Al Viro [Wed, 5 Jun 2013 18:09:55 +0000 (14:09 -0400)]
pcm_native: switch to fdget()/fdput()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Thu, 23 May 2013 02:22:04 +0000 (22:22 -0400)]
[readdir] constify ->actor
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Thu, 23 May 2013 01:44:23 +0000 (21:44 -0400)]
[readdir] ->readdir() is gone
everything's converted to ->iterate()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Thu, 23 May 2013 01:23:40 +0000 (21:23 -0400)]
[readdir] convert ecryptfs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Thu, 23 May 2013 01:15:30 +0000 (21:15 -0400)]
[readdir] convert coda
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Thu, 23 May 2013 01:06:00 +0000 (21:06 -0400)]
[readdir] convert ocfs2
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Wed, 22 May 2013 22:37:16 +0000 (18:37 -0400)]
[readdir] convert fatfs
... pox upon the idiotic ioctls; life would be much easier without
those.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Wed, 22 May 2013 21:07:56 +0000 (17:07 -0400)]
[readdir] convert xfs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Wed, 22 May 2013 20:48:09 +0000 (16:48 -0400)]
[readdir] convert btrfs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Wed, 22 May 2013 20:34:19 +0000 (16:34 -0400)]
[readdir] convert hostfs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Wed, 22 May 2013 20:31:14 +0000 (16:31 -0400)]
[readdir] convert afs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Wed, 22 May 2013 19:11:27 +0000 (15:11 -0400)]
[readdir] convert ncpfs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Wed, 22 May 2013 18:59:39 +0000 (14:59 -0400)]
[readdir] convert hfsplus
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Wed, 22 May 2013 18:29:35 +0000 (14:29 -0400)]
[readdir] convert hfs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Wed, 22 May 2013 17:44:05 +0000 (13:44 -0400)]
[readdir] convert befs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Wed, 22 May 2013 20:17:25 +0000 (16:17 -0400)]
[readdir] convert cifs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sat, 18 May 2013 07:15:00 +0000 (03:15 -0400)]
[readdir] convert freevxfs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sat, 18 May 2013 07:03:58 +0000 (03:03 -0400)]
[readdir] convert fuse
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sat, 18 May 2013 06:58:57 +0000 (02:58 -0400)]
[readdir] convert hpfs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sat, 18 May 2013 02:58:58 +0000 (22:58 -0400)]
reiserfs: switch reiserfs_readdir_dentry to inode
... and clean the callers up a bit
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sat, 18 May 2013 02:45:29 +0000 (22:45 -0400)]
reiserfs: is_privroot_deh() needs only directory inode, actually
... and that - only to get the superblock. Privroot is a directory
and we don't allow hardlinks to those...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sat, 18 May 2013 02:42:17 +0000 (22:42 -0400)]
[readdir] convert reiserfs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sat, 18 May 2013 01:22:31 +0000 (21:22 -0400)]
[readdir] convert ntfs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sat, 18 May 2013 01:11:59 +0000 (21:11 -0400)]
[readdir] convert isofs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 17 May 2013 22:08:49 +0000 (18:08 -0400)]
[readdir] convert jffs2
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 17 May 2013 22:02:17 +0000 (18:02 -0400)]
[readdir] convert f2fs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 17 May 2013 21:51:41 +0000 (17:51 -0400)]
[readdir] convert 9p
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 17 May 2013 21:44:42 +0000 (17:44 -0400)]
[readdir] convert affs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 17 May 2013 21:30:10 +0000 (17:30 -0400)]
[readdir] convert adfs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 17 May 2013 21:06:34 +0000 (17:06 -0400)]
[readdir] convert logfs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 17 May 2013 21:00:34 +0000 (17:00 -0400)]
[readdir] convert jfs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 17 May 2013 20:52:26 +0000 (16:52 -0400)]
[readdir] convert ceph
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 17 May 2013 20:34:50 +0000 (16:34 -0400)]
[readdir] convert nfs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 17 May 2013 20:08:53 +0000 (16:08 -0400)]
[readdir] convert ext4
and trim the living hell out bogosities in inline dir case
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 17 May 2013 19:32:10 +0000 (15:32 -0400)]
[readdir] convert qnx6
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 17 May 2013 19:17:59 +0000 (15:17 -0400)]
[readdir] convert qnx4
... and use strnlen() instead of strlen() - it's done on untrusted data,
after all.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 17 May 2013 19:05:25 +0000 (15:05 -0400)]
[readdir] convert omfs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Thu, 16 May 2013 18:36:14 +0000 (14:36 -0400)]
[readdir] convert nilfs2
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Thu, 16 May 2013 18:31:02 +0000 (14:31 -0400)]
[readdir] convert sysfs
get rid of the kludges in sysfs_readdir()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Thu, 16 May 2013 18:14:48 +0000 (14:14 -0400)]
[readdir] convert gfs2
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Thu, 16 May 2013 17:48:17 +0000 (13:48 -0400)]
[readdir] convert exofs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Thu, 16 May 2013 17:41:48 +0000 (13:41 -0400)]
[readdir] convert bfs
... and get rid of that ridiculous mutex in bfs_readdir()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Thu, 16 May 2013 16:07:31 +0000 (12:07 -0400)]
[readdir] convert procfs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Thu, 16 May 2013 05:52:12 +0000 (01:52 -0400)]
[readdir] convert openpromfs
what the hell is op_mutex for, BTW?
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Thu, 16 May 2013 05:41:10 +0000 (01:41 -0400)]
[readdir] convert efs
* sanity checks belong before risky operation, not after it
* don't quit as soon as we'd found an entry
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Thu, 16 May 2013 05:28:34 +0000 (01:28 -0400)]
[readdir] convert configfs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Thu, 16 May 2013 05:22:00 +0000 (01:22 -0400)]
[readdir] convert romfs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Thu, 16 May 2013 05:17:58 +0000 (01:17 -0400)]
[readdir] convert squashfs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Thu, 16 May 2013 05:14:46 +0000 (01:14 -0400)]
[readdir] convert ubifs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Thu, 16 May 2013 05:09:37 +0000 (01:09 -0400)]
[readdir] convert udf
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Thu, 16 May 2013 01:02:48 +0000 (21:02 -0400)]
[readdir] convert ext3
new helper: dir_relax(inode). Call when you are in location that will
_not_ be invalidated by directory modifications (block boundary, in case
of ext*). Returns whether the directory has survived (dropping i_mutex
allows rmdir to kill the sucker; if it returns false to us, ->iterate()
is obviously done)
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Thu, 16 May 2013 00:23:06 +0000 (20:23 -0400)]
[readdir] switch dcache_readdir() users to ->iterate()
new helpers - dir_emit_dot(file, ctx, dentry), dir_emit_dotdot(file, ctx),
dir_emit_dots(file, ctx).
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Wed, 15 May 2013 22:51:49 +0000 (18:51 -0400)]
[readdir] simple local unixlike: switch to ->iterate()
ext2, ufs, minix, sysv
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Wed, 15 May 2013 22:49:12 +0000 (18:49 -0400)]
[readdir] introduce ->iterate(), ctx->pos, dir_emit()
New method - ->iterate(file, ctx). That's the replacement for ->readdir();
it takes callback from ctx->actor, uses ctx->pos instead of file->f_pos and
calls dir_emit(ctx, ...) instead of filldir(data, ...). It does *not*
update file->f_pos (or look at it, for that matter); iterate_dir() does the
update.
Note that dir_emit() takes the offset from ctx->pos (and eventually
filldir_t will lose that argument).
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Wed, 15 May 2013 17:52:59 +0000 (13:52 -0400)]
[readdir] introduce iterate_dir() and dir_context
iterate_dir(): new helper, replacing vfs_readdir().
struct dir_context: contains the readdir callback (and will get more stuff
in it), embedded into whatever data that callback wants to deal with;
eventually, we'll be passing it to ->readdir() replacement instead of
(data,filldir) pair.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sun, 12 May 2013 14:14:07 +0000 (10:14 -0400)]
move linux/loop.h to drivers/block
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sun, 12 May 2013 14:12:11 +0000 (10:12 -0400)]
compat.c: LOOP_CLR_FD is taken care of in loop.c itself...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sat, 11 May 2013 16:39:26 +0000 (12:39 -0400)]
pxa3xx: VM_IO is set by io_remap_pfn_range()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sat, 11 May 2013 16:38:38 +0000 (12:38 -0400)]
au1100fb: VM_IO is set by io_remap_pfn_range()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sat, 11 May 2013 16:37:38 +0000 (12:37 -0400)]
au1200fb: io_remap_pfn_range() sets VM_IO
... and single return is quite sufficient to get out of function, TYVM
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sat, 11 May 2013 16:33:31 +0000 (12:33 -0400)]
vfio: remap_pfn_range() sets all those flags...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sat, 11 May 2013 16:27:16 +0000 (12:27 -0400)]
i810: VM_IO is set by io_remap_pfn_range()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sat, 11 May 2013 16:23:17 +0000 (12:23 -0400)]
drm: io_remap_pfn_range() sets VM_IO...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sat, 11 May 2013 16:21:55 +0000 (12:21 -0400)]
sparc: __pci_mmap_set_flags() is useless
io_remap_pfn_range() does all we need
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sat, 11 May 2013 16:19:34 +0000 (12:19 -0400)]
mn10300: don't bother with VM_IO
io_remap_pfn_range() sets it
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sat, 11 May 2013 16:18:01 +0000 (12:18 -0400)]
hose_mmap_page_range(): io_remap_pfn_range() will set all those flags...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sat, 11 May 2013 16:15:47 +0000 (12:15 -0400)]
samsung: don't bother with setting VM_IO
io_remap_pfn_range() will set it just fine
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sat, 11 May 2013 16:13:10 +0000 (12:13 -0400)]
consolidate io_remap_pfn_range definitions
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Artem Bityutskiy [Fri, 28 Jun 2013 11:15:15 +0000 (14:15 +0300)]
UBIFS: fix a horrid bug
Al Viro pointed me to the fact that '->readdir()' and '->llseek()' have no
mutual exclusion, which means the 'ubifs_dir_llseek()' can be run while we are
in the middle of 'ubifs_readdir()'.
This means that 'file->private_data' can be freed while 'ubifs_readdir()' uses
it, and this is a very bad bug: not only 'ubifs_readdir()' can return garbage,
but this may corrupt memory and lead to all kinds of problems like crashes an
security holes.
This patch fixes the problem by using the 'file->f_version' field, which
'->llseek()' always unconditionally sets to zero. We set it to 1 in
'ubifs_readdir()' and whenever we detect that it became 0, we know there was a
seek and it is time to clear the state saved in 'file->private_data'.
I tested this patch by writing a user-space program which runds readdir and
seek in parallell. I could easily crash the kernel without these patches, but
could not crash it with these patches.
Cc: stable@vger.kernel.org
Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Tested-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Artem Bityutskiy [Fri, 28 Jun 2013 11:15:14 +0000 (14:15 +0300)]
UBIFS: prepare to fix a horrid bug
Al Viro pointed me to the fact that '->readdir()' and '->llseek()' have no
mutual exclusion, which means the 'ubifs_dir_llseek()' can be run while we are
in the middle of 'ubifs_readdir()'.
First of all, this means that 'file->private_data' can be freed while
'ubifs_readdir()' uses it. But this particular patch does not fix the problem.
This patch is only a preparation, and the fix will follow next.
In this patch we make 'ubifs_readdir()' stop using 'file->f_pos' directly,
because 'file->f_pos' can be changed by '->llseek()' at any point. This may
lead 'ubifs_readdir()' to returning inconsistent data: directory entry names
may correspond to incorrect file positions.
So here we introduce a local variable 'pos', read 'file->f_pose' once at very
the beginning, and then stick to 'pos'. The result of this is that when
'ubifs_dir_llseek()' changes 'file->f_pos' while we are in the middle of
'ubifs_readdir()', the latter "wins".
Cc: stable@vger.kernel.org
Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Tested-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sat, 22 Jun 2013 07:01:38 +0000 (11:01 +0400)]
aout32 coredump compat fix
dump_seek() does SEEK_CUR, not SEEK_SET; native binfmt_aout
handles it correctly (seeks by PAGE_SIZE - sizeof(struct user),
getting the current position to PAGE_SIZE), compat one seeks
by PAGE_SIZE and ends up at PAGE_SIZE + already written...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Thu, 20 Jun 2013 14:58:36 +0000 (18:58 +0400)]
splice: don't pass the address of ->f_pos to methods
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Wed, 19 Jun 2013 08:35:42 +0000 (12:35 +0400)]
mconsole: we'd better initialize pos before passing it to vfs_read()...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sun, 16 Jun 2013 17:06:06 +0000 (18:06 +0100)]
lseek(fd, n, SEEK_END) does *not* go to eof - n
When you copy some code, you are supposed to read it. If nothing else,
there's a chance to spot and fix an obvious bug instead of sharing it...
X-Song: "I Got It From Agnes", by Tom Lehrer
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
[ Tom Lehrer? You're dating yourself, Al ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sat, 15 Jun 2013 21:51:07 +0000 (11:51 -1000)]
Linux 3.10-rc6
Linus Torvalds [Sat, 15 Jun 2013 21:49:48 +0000 (11:49 -1000)]
Merge tag 'fixes-for-linus' of git://git./linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"These are a little later than I planned on since I got caught up with
handling merges for 3.11 most of the week.
Another week, another batch of fixes for arm-soc platforms.
Again, nothing controversial. A few more than would be ideal, but all
are valid fixes. In particular the prima2 panic patch is critical
since it fixes a problem where multiplatform kernels panic on all but
prima2 hardware."
* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
ARM: SAMSUNG: pm: Adjust for pinctrl- and DT-enabled platforms
ARM: prima2: fix incorrect panic usage
arm: mvebu: armada-xp-{gp,openblocks-ax3-4}: specify PCIe range
ARM: Kirkwood: handle mv88f6282 cpu in __kirkwood_variant().
ARM: omap3: clock: fix wrong container_of in clock36xx.c
ARM: dts: OMAP5: Fix missing PWM capability to timer nodes
ARM: dts: omap4-panda|sdp: Fix mux for twl6030 IRQ pin and msecure line
ARM: dts: AM33xx: Fix properties on gpmc node
arm: omap2: fix AM33xx hwmod infos for UART2
ARM: OMAP3: Fix iva2_pwrdm settings for 3703
Linus Torvalds [Sat, 15 Jun 2013 21:47:56 +0000 (11:47 -1000)]
Merge git://git./linux/kernel/git/davem/net
Pull networking fixes from David Miller:
1) Fix RTNL locking in batman-adv, from Matthias Schiffer.
2) Don't allow non-passthrough macvlan devices to set NOPROMISC via
netlink, otherwise we can end up with corrupted promisc counter
values on the device. From Michael S Tsirkin.
3) Fix stmmac driver build with debugging defines enabled, from Dinh
Nguyen.
4) Make sure name string we give in socket address in AF_PACKET is NULL
terminated, from Daniel Borkmann.
5) Fix leaking of two uninitialized bytes of memory to userspace in
l2tp, from Guillaume Nault.
6) Clear IPCB(skb) before tunneling otherwise we touch dangling IP
options state and crash. From Saurabh Mohan.
7) Fix suspend/resume for davinci_mdio by using suspend_late and
resume_early. From Mugunthan V N.
8) Don't tag ip_tunnel_init_net and ip_tunnel_delete_net with
__net_{init,exit}, they can be called outside of those contexts.
From Eric Dumazet.
9) Fix RX length error in sh_eth driver, from Yoshihiro Shimoda.
10) Fix missing sctp_outq initialization in some code paths of SCTP
stack, from Neil Horman.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (21 commits)
sctp: fully initialize sctp_outq in sctp_outq_init
netiucv: Hold rtnl between name allocation and device registration.
tulip: Properly check dma mapping result
net: sh_eth: fix incorrect RX length error if R8A7740
ip_tunnel: remove __net_init/exit from exported functions
drivers: net: davinci_mdio: restore mdio clk divider in mdio resume
drivers: net: davinci_mdio: moving mdio resume earlier than cpsw ethernet driver
net/ipv4: ip_vti clear skb cb before tunneling.
tg3: Wait for boot code to finish after power on
l2tp: Fix sendmsg() return value
l2tp: Fix PPP header erasure and memory leak
bonding: fix igmp_retrans type and two related races
bonding: reset master mac on first enslave failure
packet: packet_getname_spkt: make sure string is always 0-terminated
net: ethernet: stmicro: stmmac: Fix compile error when STMMAC_XMIT_DEBUG used
be2net: Fix 32-bit DMA Mask handling
xen-netback: don't de-reference vif pointer after having called xenvif_put()
macvlan: don't touch promisc without passthrough
batman-adv: Don't handle address updates when bla is disabled
batman-adv: forward late OGMs from best next hop
...
Linus Torvalds [Sat, 15 Jun 2013 05:25:04 +0000 (19:25 -1000)]
Merge branch 'merge' of git://git./linux/kernel/git/benh/powerpc
Pull powerpc fixes from Benjamin Herrenschmidt:
"So here are 3 fixes still for 3.10. Fixes are simple, bugs are nasty
(though not recent regressions, nasty enough) and all targeted at
stable"
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
powerpc: Fix missing/delayed calls to irq_work
powerpc: Fix emulation of illegal instructions on PowerNV platform
powerpc: Fix stack overflow crash in resume_kernel when ftracing
David Daney [Fri, 14 Jun 2013 18:13:59 +0000 (11:13 -0700)]
smp.h: Use local_irq_{save,restore}() in !SMP version of on_each_cpu().
Thanks to commit
f91eb62f71b3 ("init: scream bloody murder if interrupts
are enabled too early"), "bloody murder" is now being screamed.
With a MIPS OCTEON config, we use on_each_cpu() in our
irq_chip.irq_bus_sync_unlock() function. This gets called in early as a
result of the time_init() call. Because the !SMP version of
on_each_cpu() unconditionally enables irqs, we get:
WARNING: at init/main.c:560 start_kernel+0x250/0x410()
Interrupts were enabled early
CPU: 0 PID: 0 Comm: swapper Not tainted 3.10.0-rc5-Cavium-Octeon+ #801
Call Trace:
show_stack+0x68/0x80
warn_slowpath_common+0x78/0xb0
warn_slowpath_fmt+0x38/0x48
start_kernel+0x250/0x410
Suggested fix: Do what we already do in the SMP version of
on_each_cpu(), and use local_irq_save/local_irq_restore. Because we
need a flags variable, make it a static inline to avoid name space
issues.
[ Change from v1: Convert on_each_cpu to a static inline function, add
#include <linux/irqflags.h> to avoid build breakage on some files.
on_each_cpu_mask() and on_each_cpu_cond() suffer the same problem as
on_each_cpu(), but they are not causing !SMP bugs for me, so I will
defer changing them to a less urgent patch. ]
Signed-off-by: David Daney <david.daney@cavium.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sat, 15 Jun 2013 05:18:56 +0000 (19:18 -1000)]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs
Pull VFS fixes from Al Viro:
"Several fixes + obvious cleanup (you've missed a couple of open-coded
can_lookup() back then)"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
snd_pcm_link(): fix a leak...
use can_lookup() instead of direct checks of ->i_op->lookup
move exit_task_namespaces() outside of exit_notify()
fput: task_work_add() can fail if the caller has passed exit_task_work()
ncpfs: fix rmdir returns Device or resource busy
Linus Torvalds [Sat, 15 Jun 2013 05:16:31 +0000 (19:16 -1000)]
Merge tag 'for-linus-v3.10-rc6' of git://oss.sgi.com/xfs/xfs
Pull xfs fixes from Ben Myers:
- Remove noisy warnings about experimental support which spams the logs
- Add padding to align directory and attr structures correctly
- Set block number on child buffer on a root btree split
- Disable verifiers during log recovery for non-CRC filesystems
* tag 'for-linus-v3.10-rc6' of git://oss.sgi.com/xfs/xfs:
xfs: don't shutdown log recovery on validation errors
xfs: ensure btree root split sets blkno correctly
xfs: fix implicit padding in directory and attr CRC formats
xfs: don't emit v5 superblock warnings on write
Linus Torvalds [Sat, 15 Jun 2013 05:15:36 +0000 (19:15 -1000)]
Merge tag 'char-misc-3.10-rc5' of git://git./linux/kernel/git/gregkh/char-misc
Pull char / misc fixes from Greg Kroah-Hartman:
"Here are some small mei driver fixes for 3.10-rc6 that fix some
reported problems"
* tag 'char-misc-3.10-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
mei: me: clear interrupts on the resume path
mei: nfc: fix nfc device freeing
mei: init: Flush scheduled work before resetting the device
Linus Torvalds [Sat, 15 Jun 2013 05:14:39 +0000 (19:14 -1000)]
Merge tag 'usb-3.10-rc5' of git://git./linux/kernel/git/gregkh/usb
Pull USB fixes from Greg Kroah-Hartman:
"Here are some small USB driver fixes that resolve some reported
problems for 3.10-rc6
Nothing major, just 3 USB serial driver fixes, and two chipidea fixes"
* tag 'usb-3.10-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
usb: chipidea: fix id change handling
usb: chipidea: fix no transceiver case
USB: pl2303: fix device initialisation at open
USB: spcp8x5: fix device initialisation at open
USB: f81232: fix device initialisation at open
Benjamin Herrenschmidt [Sat, 15 Jun 2013 02:13:40 +0000 (12:13 +1000)]
powerpc: Fix missing/delayed calls to irq_work
When replaying interrupts (as a result of the interrupt occurring
while soft-disabled), in the case of the decrementer, we are exclusively
testing for a pending timer target. However we also use decrementer
interrupts to trigger the new "irq_work", which in this case would
be missed.
This change the logic to force a replay in both cases of a timer
boundary reached and a decrementer interrupt having actually occurred
while disabled. The former test is still useful to catch cases where
a CPU having been hard-disabled for a long time completely misses the
interrupt due to a decrementer rollover.
CC: <stable@vger.kernel.org> [v3.4+]
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Tested-by: Steven Rostedt <rostedt@goodmis.org>
Paul Mackerras [Fri, 14 Jun 2013 10:07:41 +0000 (20:07 +1000)]
powerpc: Fix emulation of illegal instructions on PowerNV platform
Normally, the kernel emulates a few instructions that are unimplemented
on some processors (e.g. the old dcba instruction), or privileged (e.g.
mfpvr). The emulation of unimplemented instructions is currently not
working on the PowerNV platform. The reason is that on these machines,
unimplemented and illegal instructions cause a hypervisor emulation
assist interrupt, rather than a program interrupt as on older CPUs.
Our vector for the emulation assist interrupt just calls
program_check_exception() directly, without setting the bit in SRR1
that indicates an illegal instruction interrupt. This fixes it by
making the emulation assist interrupt set that bit before calling
program_check_interrupt(). With this, old programs that use no-longer
implemented instructions such as dcba now work again.
CC: <stable@vger.kernel.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Michael Ellerman [Thu, 13 Jun 2013 11:04:56 +0000 (21:04 +1000)]
powerpc: Fix stack overflow crash in resume_kernel when ftracing
It's possible for us to crash when running with ftrace enabled, eg:
Bad kernel stack pointer
bffffd12 at
c00000000000a454
cpu 0x3: Vector: 300 (Data Access) at [
c00000000ffe3d40]
pc:
c00000000000a454: resume_kernel+0x34/0x60
lr:
c00000000000335c: performance_monitor_common+0x15c/0x180
sp:
bffffd12
msr:
8000000000001032
dar:
bffffd12
dsisr:
42000000
If we look at current's stack (paca->__current->stack) we see it is
equal to
c0000002ecab0000. Our stack is 16K, and comparing to
paca->kstack (
c0000002ecab3e30) we can see that we have overflowed our
kernel stack. This leads to us writing over our struct thread_info, and
in this case we have corrupted thread_info->flags and set
_TIF_EMULATE_STACK_STORE.
Dumping the stack we see:
3:mon> t
c0000002ecab0000
[
c0000002ecab0000]
c00000000002131c .performance_monitor_exception+0x5c/0x70
[
c0000002ecab0080]
c00000000000335c performance_monitor_common+0x15c/0x180
--- Exception: f01 (Performance Monitor) at
c0000000000fb2ec .trace_hardirqs_off+0x1c/0x30
[
c0000002ecab0370]
c00000000016fdb0 .trace_graph_entry+0xb0/0x280 (unreliable)
[
c0000002ecab0410]
c00000000003d038 .prepare_ftrace_return+0x98/0x130
[
c0000002ecab04b0]
c00000000000a920 .ftrace_graph_caller+0x14/0x28
[
c0000002ecab0520]
c0000000000d6b58 .idle_cpu+0x18/0x90
[
c0000002ecab05a0]
c00000000000a934 .return_to_handler+0x0/0x34
[
c0000002ecab0620]
c00000000001e660 .timer_interrupt+0x160/0x300
[
c0000002ecab06d0]
c0000000000025dc decrementer_common+0x15c/0x180
--- Exception: 901 (Decrementer) at
c0000000000104d4 .arch_local_irq_restore+0x74/0xa0
[
c0000002ecab09c0]
c0000000000fe044 .trace_hardirqs_on+0x14/0x30 (unreliable)
[
c0000002ecab0fb0]
c00000000016fe3c .trace_graph_entry+0x13c/0x280
[
c0000002ecab1050]
c00000000003d038 .prepare_ftrace_return+0x98/0x130
[
c0000002ecab10f0]
c00000000000a920 .ftrace_graph_caller+0x14/0x28
[
c0000002ecab1160]
c0000000000161f0 .__ppc64_runlatch_on+0x10/0x40
[
c0000002ecab11d0]
c00000000000a934 .return_to_handler+0x0/0x34
--- Exception: 901 (Decrementer) at
c0000000000104d4 .arch_local_irq_restore+0x74/0xa0
... and so on
__ppc64_runlatch_on() is called from RUNLATCH_ON in the exception entry
path. At that point the irq state is not consistent, ie. interrupts are
hard disabled (by the exception entry), but the paca soft-enabled flag
may be out of sync.
This leads to the local_irq_restore() in trace_graph_entry() actually
enabling interrupts, which we do not want. Because we have not yet
reprogrammed the decrementer we immediately take another decrementer
exception, and recurse.
The fix is twofold. Firstly make sure we call DISABLE_INTS before
calling RUNLATCH_ON. The badly named DISABLE_INTS actually reconciles
the irq state in the paca with the hardware, making it safe again to
call local_irq_save/restore().
Although that should be sufficient to fix the bug, we also mark the
runlatch routines as notrace. They are called very early in the
exception entry and we are asking for trouble tracing them. They are
also fairly uninteresting and tracing them just adds unnecessary
overhead.
[ This regression was introduced by
fe1952fc0afb9a2e4c79f103c08aef5d13db1873
"powerpc: Rework runlatch code" by myself --BenH
]
CC: <stable@vger.kernel.org> [v3.4+]
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Al Viro [Wed, 5 Jun 2013 18:07:08 +0000 (14:07 -0400)]
snd_pcm_link(): fix a leak...
in case when snd_pcm_stream_linked(substream) is true, we end up leaking
group.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Thu, 6 Jun 2013 23:33:47 +0000 (19:33 -0400)]
use can_lookup() instead of direct checks of ->i_op->lookup
a couple of places got missed back when Linus has introduced that one...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Oleg Nesterov [Fri, 14 Jun 2013 19:09:49 +0000 (21:09 +0200)]
move exit_task_namespaces() outside of exit_notify()
exit_notify() does exit_task_namespaces() after
forget_original_parent(). This was needed to ensure that ->nsproxy
can't be cleared prematurely, an exiting child we are going to
reparent can do do_notify_parent() and use the parent's (ours) pid_ns.
However, after
32084504 "pidns: use task_active_pid_ns in
do_notify_parent" ->nsproxy != NULL is no longer needed, we rely
on task_active_pid_ns().
Move exit_task_namespaces() from exit_notify() to do_exit(), after
exit_fs() and before exit_task_work().
This solves the problem reported by Andrey, free_ipc_ns()->shm_destroy()
does fput() which needs task_work_add().
Note: this particular problem can be fixed if we change fput(), and
that change makes sense anyway. But there is another reason to move
the callsite. The original reason for exit_task_namespaces() from
the middle of exit_notify() was subtle and it has already gone away,
now this looks confusing. And this allows us do simplify exit_notify(),
we can avoid unlock/lock(tasklist) and we can use ->exit_state instead
of PF_EXITING in forget_original_parent().
Reported-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Oleg Nesterov [Fri, 14 Jun 2013 19:09:47 +0000 (21:09 +0200)]
fput: task_work_add() can fail if the caller has passed exit_task_work()
fput() assumes that it can't be called after exit_task_work() but
this is not true, for example free_ipc_ns()->shm_destroy() can do
this. In this case fput() silently leaks the file.
Change it to fallback to delayed_fput_work if task_work_add() fails.
The patch looks complicated but it is not, it changes the code from
if (PF_KTHREAD) {
schedule_work(...);
return;
}
task_work_add(...)
to
if (!PF_KTHREAD) {
if (!task_work_add(...))
return;
/* fallback */
}
schedule_work(...);
As for shm_destroy() in particular, we could make another fix but I
think this change makes sense anyway. There could be another similar
user, it is not safe to assume that task_work_add() can't fail.
Reported-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Dave Chinner [Wed, 12 Jun 2013 02:19:06 +0000 (12:19 +1000)]
xfs: don't shutdown log recovery on validation errors
Unfortunately, we cannot guarantee that items logged multiple times
and replayed by log recovery do not take objects back in time. When
they are taken back in time, the go into an intermediate state which
is corrupt, and hence verification that occurs on this intermediate
state causes log recovery to abort with a corruption shutdown.
Instead of causing a shutdown and unmountable filesystem, don't
verify post-recovery items before they are written to disk. This is
less than optimal, but there is no way to detect this issue for
non-CRC filesystems If log recovery successfully completes, this
will be undone and the object will be consistent by subsequent
transactions that are replayed, so in most cases we don't need to
take drastic action.
For CRC enabled filesystems, leave the verifiers in place - we need
to call them to recalculate the CRCs on the objects anyway. This
recovery problem can be solved for such filesystems - we have a LSN
stamped in all metadata at writeback time that we can to determine
whether the item should be replayed or not. This is a separate piece
of work, so is not addressed by this patch.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
(cherry picked from commit
9222a9cf86c0d64ffbedf567412b55da18763aa3)
Dave Chinner [Wed, 12 Jun 2013 02:19:08 +0000 (12:19 +1000)]
xfs: ensure btree root split sets blkno correctly
For CRC enabled filesystems, the BMBT is rooted in an inode, so it
passes through a different code path on root splits than the
freespace and inode btrees. This is much less traversed by xfstests
than the other trees. When testing on a 1k block size filesystem,
I've been seeing ASSERT failures in generic/234 like:
XFS: Assertion failed: cur->bc_btnum != XFS_BTNUM_BMAP || cur->bc_private.b.allocated == 0, file: fs/xfs/xfs_btree.c, line: 317
which are generally preceded by a lblock check failure. I noticed
this in the bmbt stats:
$ pminfo -f xfs.btree.block_map
xfs.btree.block_map.lookup
value 39135
xfs.btree.block_map.compare
value 268432
xfs.btree.block_map.insrec
value 15786
xfs.btree.block_map.delrec
value 13884
xfs.btree.block_map.newroot
value 2
xfs.btree.block_map.killroot
value 0
.....
Very little coverage of root splits and merges. Indeed, on a 4k
filesystem, block_map.newroot and block_map.killroot are both zero.
i.e. the code is not exercised at all, and it's the only generic
btree infrastructure operation that is not exercised by a default run
of xfstests.
Turns out that on a 1k filesystem, generic/234 accounts for one of
those two root splits, and that is somewhat of a smoking gun. In
fact, it's the same problem we saw in the directory/attr code where
headers are memcpy()d from one block to another without updating the
self describing metadata.
Simple fix - when copying the header out of the root block, make
sure the block number is updated correctly.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
(cherry picked from commit
ade1335afef556df6538eb02e8c0dc91fbd9cc37)
Dave Chinner [Wed, 12 Jun 2013 02:19:07 +0000 (12:19 +1000)]
xfs: fix implicit padding in directory and attr CRC formats
Michael L. Semon has been testing CRC patches on a 32 bit system and
been seeing assert failures in the directory code from xfs/080.
Thanks to Michael's heroic efforts with printk debugging, we found
that the problem was that the last free space being left in the
directory structure was too small to fit a unused tag structure and
it was being corrupted and attempting to log a region out of bounds.
Hence the assert failure looked something like:
.....
#5 calling xfs_dir2_data_log_unused() 36 32
#1 4092 4095 4096
#2 8182 8183 4096
XFS: Assertion failed: first <= last && last < BBTOB(bp->b_length), file: fs/xfs/xfs_trans_buf.c, line: 568
Where #1 showed the first region of the dup being logged (i.e. the
last 4 bytes of a directory buffer) and #2 shows the corrupt values
being calculated from the length of the dup entry which overflowed
the size of the buffer.
It turns out that the problem was not in the logging code, nor in
the freespace handling code. It is an initial condition bug that
only shows up on 32 bit systems. When a new buffer is initialised,
where's the freespace that is set up:
[ 172.316249] calling xfs_dir2_leaf_addname() from xfs_dir_createname()
[ 172.316346] #9 calling xfs_dir2_data_log_unused()
[ 172.316351] #1 calling xfs_trans_log_buf() 60 63 4096
[ 172.316353] #2 calling xfs_trans_log_buf() 4094 4095 4096
Note the offset of the first region being logged? It's 60 bytes into
the buffer. Once I saw that, I pretty much knew that the bug was
going to be caused by this.
Essentially, all direct entries are rounded to 8 bytes in length,
and all entries start with an 8 byte alignment. This means that we
can decode inplace as variables are naturally aligned. With the
directory data supposedly starting on a 8 byte boundary, and all
entries padded to 8 bytes, the minimum freespace in a directory
block is supposed to be 8 bytes, which is large enough to fit a
unused data entry structure (6 bytes in size). The fact we only have
4 bytes of free space indicates a directory data block alignment
problem.
And what do you know - there's an implicit hole in the directory
data block header for the CRC format, which means the header is 60
byte on 32 bit intel systems and 64 bytes on 64 bit systems. Needs
padding. And while looking at the structures, I found the same
problem in the attr leaf header. Fix them both.
Note that this only affects 32 bit systems with CRCs enabled.
Everything else is just fine. Note that CRC enabled filesystems created
before this fix on such systems will not be readable with this fix
applied.
Reported-by: Michael L. Semon <mlsemon35@gmail.com>
Debugged-by: Michael L. Semon <mlsemon35@gmail.com>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
(cherry picked from commit
8a1fd2950e1fe267e11fc8c85dcaa6b023b51b60)
Dave Chinner [Mon, 27 May 2013 06:38:19 +0000 (16:38 +1000)]
xfs: don't emit v5 superblock warnings on write
We write the superblock every 30s or so which results in the
verifier being called. Right now that results in this output
every 30s:
XFS (vda): Version 5 superblock detected. This kernel has EXPERIMENTAL support enabled!
Use of these features in this kernel is at your own risk!
And spamming the logs.
We don't need to check for whether we support v5 superblocks or
whether there are feature bits we don't support set as these are
only relevant when we first mount the filesytem. i.e. on superblock
read. Hence for the write verification we can just skip all the
checks (and hence verbose output) altogether.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
(cherry picked from commit
34510185abeaa5be9b178a41c0a03d30aec3db7e)
Linus Torvalds [Fri, 14 Jun 2013 05:34:14 +0000 (22:34 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/mason/linux-btrfs
Pull btrfs fixes from Chris Mason:
"This is an assortment of crash fixes"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
Btrfs: stop all workers before cleaning up roots
Btrfs: fix use-after-free bug during umount
Btrfs: init relocate extent_io_tree with a mapping
btrfs: Drop inode if inode root is NULL
Btrfs: don't delete fs_roots until after we cleanup the transaction
Tomas Winkler [Wed, 5 Jun 2013 07:51:13 +0000 (10:51 +0300)]
mei: me: clear interrupts on the resume path
We need to clear pending interrupts on the resume
path. This brings the device into defined state
before starting the reset flow
This should solve suspend/resume issues:
mei_me : wait hw ready failed. status = 0x0
mei_me : version message write failed
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tomas Winkler [Mon, 10 Jun 2013 07:10:26 +0000 (10:10 +0300)]
mei: nfc: fix nfc device freeing
The nfc_dev is a static variable and is not cleaned properly upon reset
mainly ndev->cl and ndev->cl_info are not set to NULL after freeing which
mei_stop:198: mei_me 0000:00:16.0: stopping the device.
[ 404.253427] general protection fault: 0000 [#2] SMP
[ 404.253437] Modules linked in: mei_me(-) binfmt_misc snd_pcm_oss snd_mixer_oss snd_seq snd_seq_device edd af_packet cpufreq_conservative cpufreq_userspace cpufreq_powersave fuse loop dm_mod hid_generic usbhid hid coretemp acpi_cpufreq mperf kvm_intel kvm crc32c_intel ghash_clmulni_intel aesni_intel ablk_helper cryptd lrw gf128mul snd_hda_codec_hdmi glue_helper aes_x86_64 e1000e snd_hda_intel snd_hda_codec ehci_pci iTCO_wdt iTCO_vendor_support ehci_hcd snd_hwdep xhci_hcd snd_pcm usbcore ptp mei sg microcode snd_timer pps_core i2c_i801 snd pcspkr battery rtc_cmos lpc_ich mfd_core soundcore usb_common snd_page_alloc ac ext3 jbd mbcache drm_kms_helper drm intel_agp i2c_algo_bit intel_gtt i2c_core sd_mod crc_t10dif thermal fan video button processor thermal_sys hwmon ahci libahci libata scsi_mod [last unloaded: mei_me]
[ 404.253591] CPU: 0 PID: 5551 Comm: modprobe Tainted: G D W 3.10.0-rc3 #1
[ 404.253611] task:
ffff880143cd8300 ti:
ffff880144a2a000 task.ti:
ffff880144a2a000
[ 404.253619] RIP: 0010:[<
ffffffff81334e5d>] [<
ffffffff81334e5d>] device_del+0x1d/0x1d0
[ 404.253638] RSP: 0018:
ffff880144a2bcf8 EFLAGS:
00010206
[ 404.253645] RAX:
2020302e30202030 RBX:
ffff880144fdb000 RCX:
0000000000000086
[ 404.253652] RDX:
0000000000000001 RSI:
0000000000000086 RDI:
ffff880144fdb000
[ 404.253659] RBP:
ffff880144a2bd18 R08:
0000000000000651 R09:
0000000000000006
[ 404.253666] R10:
0000000000000651 R11:
0000000000000006 R12:
ffff880144fdb000
[ 404.253673] R13:
ffff880149371098 R14:
ffff880144482c00 R15:
ffffffffa04710e0
[ 404.253681] FS:
00007f251c59a700(0000) GS:
ffff88014e200000(0000) knlGS:
0000000000000000
[ 404.253689] CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
[ 404.253696] CR2:
ffffffffff600400 CR3:
0000000145319000 CR4:
00000000001407f0
[ 404.253703] DR0:
0000000000000000 DR1:
0000000000000000 DR2:
0000000000000000
[ 404.253710] DR3:
0000000000000000 DR6:
00000000fffe0ff0 DR7:
0000000000000400
[ 404.253716] Stack:
[ 404.253720]
ffff880144fdb000 ffff880143ffe000 ffff880149371098 ffffffffa0471000
[ 404.253732]
ffff880144a2bd38 ffffffff8133502d ffff88014e20cf48 ffff880143ffe1d8
[ 404.253744]
ffff880144a2bd48 ffffffffa02a4749 ffff880144a2bd58 ffffffffa02a4ba1
[ 404.253755] Call Trace:
[ 404.253766] [<
ffffffff8133502d>] device_unregister+0x1d/0x60
[ 404.253787] [<
ffffffffa02a4749>] mei_cl_remove_device+0x9/0x10 [mei]
[ 404.253804] [<
ffffffffa02a4ba1>] mei_nfc_host_exit+0x21/0x30 [mei]
[ 404.253819] [<
ffffffffa029c2dd>] mei_stop+0x3d/0x90 [mei]
[ 404.253830] [<
ffffffffa046e220>] mei_me_remove+0x60/0xe0 [mei_me]
[ 404.253843] [<
ffffffff81278f37>] pci_device_remove+0x37/0xb0
[ 404.253855] [<
ffffffff81337c68>] __device_release_driver+0x98/0x100
[ 404.253865] [<
ffffffff81337d80>] driver_detach+0xb0/0xc0
[ 404.253876] [<
ffffffff81336b4f>] bus_remove_driver+0x8f/0x120
[ 404.253891] [<
ffffffff81075990>] ? try_to_wake_up+0x2b0/0x2b0
[ 404.253903] [<
ffffffff81338a48>] driver_unregister+0x58/0x90
[ 404.253913] [<
ffffffff8127906b>] pci_unregister_driver+0x2b/0xb0
[ 404.253924] [<
ffffffffa046f244>] mei_me_driver_exit+0x10/0xdcc [mei_me]
[ 404.253936] [<
ffffffff810a50d8>] SyS_delete_module+0x198/0x2b0
[ 404.253949] [<
ffffffff814850d9>] ? do_page_fault+0x9/0x10
[ 404.253961] [<
ffffffff81489692>] system_call_fastpath+0x16/0x1b
[ 404.253967] Code: 41 5c 41 5d 41 5e 41 5f c9 c3 0f 1f 40 00 55 48 89 e5 41 56 41 55 41 54 49 89 fc 53 48 8b 87 88 00 00 00 4c 8b 37 48 85 c0 74 18 <48> 8b 78 78 4c 89 e2 be 02 00 00 00 48 81 c7 f8 00 00 00 e8 3b
[ 404.254048] RIP [<
ffffffff81334e5d>] device_del+0x1d/0x1d0
Cc: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Samuel Ortiz [Mon, 10 Jun 2013 07:10:25 +0000 (10:10 +0300)]
mei: init: Flush scheduled work before resetting the device
Flushing pending work items before resetting the device makes more
sense than doing so afterwards. Some of them, like e.g. the NFC
initialization one, find themselves with client IDs changed after
the reset, eventually leading to trigger a client.c:mei_me_cl_by_id()
warning after a few modprobe/rmmod cycles.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Neil Horman [Wed, 12 Jun 2013 18:26:44 +0000 (14:26 -0400)]
sctp: fully initialize sctp_outq in sctp_outq_init
In commit
2f94aabd9f6c925d77aecb3ff020f1cc12ed8f86
(refactor sctp_outq_teardown to insure proper re-initalization)
we modified sctp_outq_teardown to use sctp_outq_init to fully re-initalize the
outq structure. Steve West recently asked me why I removed the q->error = 0
initalization from sctp_outq_teardown. I did so because I was operating under
the impression that sctp_outq_init would properly initalize that value for us,
but it doesn't. sctp_outq_init operates under the assumption that the outq
struct is all 0's (as it is when called from sctp_association_init), but using
it in __sctp_outq_teardown violates that assumption. We should do a memset in
sctp_outq_init to ensure that the entire structure is in a known state there
instead.
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Reported-by: "West, Steve (NSN - US/Fort Worth)" <steve.west@nsn.com>
CC: Vlad Yasevich <vyasevich@gmail.com>
CC: netdev@vger.kernel.org
CC: davem@davemloft.net
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Benjamin Poirier [Thu, 13 Jun 2013 13:09:47 +0000 (09:09 -0400)]
netiucv: Hold rtnl between name allocation and device registration.
fixes a race condition between concurrent initializations of netiucv devices
that try to use the same name.
sysfs: cannot create duplicate filename '/devices/iucv/netiucv2'
[...]
Call Trace:
([<
00000000002edea4>] sysfs_add_one+0xb0/0xdc)
[<
00000000002eecd4>] create_dir+0x80/0xfc
[<
00000000002eee38>] sysfs_create_dir+0xe8/0x118
[<
00000000003835a8>] kobject_add_internal+0x120/0x2d0
[<
00000000003839d6>] kobject_add+0x62/0x9c
[<
00000000003d9564>] device_add+0xcc/0x510
[<
000003e00212c7b4>] netiucv_register_device+0xc0/0x1ec [netiucv]
Signed-off-by: Benjamin Poirier <bpoirier@suse.de>
Tested-by: Ursula Braun <braunu@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>