i2som-imx-linux/fs at ac2c39824efafedca3fe02f429443cbfcd44cbaa - i2som-imx-linux - i2SOMGit

iMX/i2som-imx-linux

Files

History

Eric Wong 416db02bea epoll: prevent missed events on EPOLL_CTL_MOD

commit 128dd1759d upstream.

EPOLL_CTL_MOD sets the interest mask before calling f_op->poll() to
ensure events are not missed.  Since the modifications to the interest
mask are not protected by the same lock as ep_poll_callback, we need to
ensure the change is visible to other CPUs calling ep_poll_callback.

We also need to ensure f_op->poll() has an up-to-date view of past
events which occured before we modified the interest mask.  So this
barrier also pairs with the barrier in wq_has_sleeper().

This should guarantee either ep_poll_callback or f_op->poll() (or both)
will notice the readiness of a recently-ready/modified item.

This issue was encountered by Andreas Voellmy and Junchang(Jason) Wang in:
http://thread.gmane.org/gmane.linux.kernel/1408782/

Signed-off-by: Eric Wong <normalperson@yhbt.net>
Cc: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Davide Libenzi <davidel@xmailserver.org>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: David Miller <davem@davemloft.net>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andreas Voellmy <andreas.voellmy@yale.edu>
Tested-by: "Junchang(Jason) Wang" <junchang.wang@yale.edu>
Cc: netdev@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

2013-01-16 01:13:22 +00:00

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afs: Remote abort can cause BUG in rxrpc code

2012-03-23 11:21:22 -07:00

autofs4 - fix reset pending flag on mount fail

2012-10-17 03:49:49 +01:00

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Btrfs: call the ordered free operation without any locks held

2012-08-02 14:38:02 +01:00

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tmpfs,ceph,gfs2,isofs,reiserfs,xfs: fix fh_len checking

2012-10-30 23:26:40 +00:00

cifs: adjust sequence number downward after signing NT_CANCEL request

2013-01-16 01:13:13 +00:00

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configfs: register_filesystem() called too early

2011-12-13 12:35:15 -05:00

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eCryptfs: check for eCryptfs cipher support at mount

2012-11-16 16:47:19 +00:00

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ore: Fix out-of-bounds access in _ios_obj()

2012-08-10 00:25:12 +01:00

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ext3: Fix fdatasync() for files with only i_size changes

2012-09-19 15:04:37 +01:00

ext4: do not try to write superblock on ro remount w/o journal

2013-01-16 01:13:12 +00:00

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fuse: fix retrieve length

2012-09-19 15:04:38 +01:00

GFS2: Test bufdata with buffer locked and gfs2_log_lock held

2012-12-06 11:20:17 +00:00

hfs: add sanity check for file name length

2011-11-15 14:29:42 -02:00

hfsplus: fix overflow in sector calculations in hfsplus_submit_bio

2012-08-19 18:15:27 +01:00

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mm: compaction: introduce sync-light migration for use by compaction

2012-08-02 14:37:32 +01:00

tmpfs,ceph,gfs2,isofs,reiserfs,xfs: fix fh_len checking

2012-10-30 23:26:40 +00:00

jbd: Fix lock ordering bug in journal_unmap_buffer()

2012-12-06 11:20:35 +00:00

jbd2: fix assertion failure in jbd2_journal_flush()

2013-01-16 01:13:11 +00:00

jffs2: Fix lock acquisition order bug in jffs2_write_begin

2012-12-06 11:20:22 +00:00

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Revert "lockd: use rpc client's cl_nodename for id encoding"

2012-10-30 23:27:08 +00:00

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minixfs: misplaced checks lead to dentry leak

2012-01-04 15:03:06 -08:00

fs/ncpfs: fix error paths and goto statements in ncp_fill_super()

2011-12-14 00:45:33 -05:00

nfs: fix null checking in nfs_get_option_str()

2013-01-16 01:13:19 +00:00

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nfsd4: fix oops on unusual readlike compound

2013-01-03 03:33:43 +00:00

nilfs2: fix deadlock issue between chcp and thaw ioctls

2012-08-10 00:25:02 +01:00

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fanotify: fix missing break

2012-11-16 16:47:12 +00:00

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ocfs2: fix NULL pointer dereference in __ocfs2_change_file_space()

2012-07-25 04:11:14 +01:00

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block: Fix NULL pointer dereference in sd_revalidate_disk

2012-03-19 09:02:34 -07:00

proc: pid/status: show all supplementary groups

2013-01-03 03:33:43 +00:00

pstore: pass allocated memory region back to caller

2011-11-17 12:58:07 -08:00

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fs: ramfs: file-nommu: add SetPageUptodate()

2012-07-25 04:11:16 +01:00

reiserfs: Move quota calls out of write lock

2012-12-06 11:20:28 +00:00

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Squashfs: fix mount time sanity check for corrupted superblock

2012-09-12 03:37:36 +01:00

sysfs: sysfs_pathname/sysfs_add_one: Use strlcat() instead of strcat()

2012-10-30 23:26:59 +00:00

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UBIFS: fix mounting problems after power cuts

2012-12-06 11:20:01 +00:00

udf: don't increment lenExtents while writing to a hole

2013-01-16 01:13:21 +00:00

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xfs: drop buffer io reference when a bad bio is built

2012-12-06 11:20:25 +00:00

aio.c

vfs: make AIO use the proper rw_verify_area() area helpers

2012-05-31 00:43:29 +01:00

anon_inodes.c

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attr.c

vfs: increment iversion when a file is truncated

2012-06-10 14:41:50 +01:00

bad_inode.c

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binfmt_aout.c

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binfmt_elf_fdpic.c

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binfmt_elf.c

coredump: prevent double-free on an error path in core dumper

2012-10-17 03:49:05 +01:00

binfmt_em86.c

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binfmt_flat.c

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binfmt_misc.c

exec: do not leave bprm->interp on stack

2013-01-03 03:33:45 +00:00

binfmt_script.c

exec: do not leave bprm->interp on stack

2013-01-03 03:33:45 +00:00

binfmt_som.c

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bio-integrity.c

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bio.c

bio allocation failure due to bio_get_nr_vecs()

2012-05-31 00:43:15 +01:00

block_dev.c

block: don't mark buffers beyond end of disk as mapped

2012-05-31 00:44:04 +01:00

buffer.c

block: replace __getblk_slow misfix by grow_dev_page fix

2012-09-12 03:37:28 +01:00

char_dev.c

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compat_binfmt_elf.c

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compat_ioctl.c

fs/compat_ioctl.c: VIDEO_SET_SPU_PALETTE missing error check

2012-10-30 23:27:08 +00:00

compat.c

vfs: missed source of ->f_pos races

2012-09-12 03:37:21 +01:00

dcache.c

vfs: d_obtain_alias() needs to use "/" as default name.

2013-01-03 03:33:45 +00:00

dcookies.c

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direct-io.c

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drop_caches.c

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eventfd.c

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eventpoll.c

epoll: prevent missed events on EPOLL_CTL_MOD

2013-01-16 01:13:22 +00:00

exec.c

exec: do not leave bprm->interp on stack

2013-01-03 03:33:45 +00:00

fcntl.c

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fhandle.c

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fifo.c

fifo: Do not restart open() if it already found a partner

2012-07-25 04:11:24 +01:00

file_table.c

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file.c

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filesystems.c

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fs_struct.c

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fs-writeback.c

ext4: fix potential deadlock in ext4_nonda_switch()

2012-10-17 03:48:38 +01:00

generic_acl.c

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inode.c

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internal.h

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ioctl.c

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ioprio.c

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Kconfig

ore: FIX breakage when MISC_FILESYSTEMS is not set

2012-01-12 11:29:29 -08:00

Kconfig.binfmt

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libfs.c

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locks.c

locks: fix checking of fcntl_setlease argument

2012-08-02 14:37:59 +01:00

Makefile

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mbcache.c

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mpage.c

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namei.c

vfs: fix double put after complete_walk()

2012-03-19 09:02:20 -07:00

namespace.c

vfs: umount_tree() might be called on subtree that had never made it

2012-06-10 14:41:51 +01:00

no-block.c

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open.c

vfs: canonicalize create mode in build_open_flags()

2012-09-12 03:37:03 +01:00

pipe.c

pipes: add a "packetized pipe" mode for writing

2012-05-11 13:14:43 +01:00

pnode.c

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pnode.h

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posix_acl.c

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read_write.c

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read_write.h

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readdir.c

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select.c

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seq_file.c

fix apparmor dereferencing potentially freed dentry, sanitize __d_path() API

2011-12-06 23:57:18 -05:00

signalfd.c

epoll: ep_unregister_pollwait() can use the freed pwq->whead

2012-02-29 16:31:24 -08:00

splice.c

splice: fix racy pipe->buffers uses

2012-07-12 04:31:59 +01:00

stack.c

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stat.c

vfs: make O_PATH file descriptors usable for 'fstat()'

2012-09-19 15:05:25 +01:00

statfs.c

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super.c

wake up s_wait_unfrozen when ->freeze_fs fails

2012-05-31 00:43:54 +01:00

sync.c

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timerfd.c

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utimes.c

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xattr_acl.c

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xattr.c

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