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| author | Ming Lei <ming.lei@canonical.com> | 2013-03-20 23:25:24 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-20 16:53:42 -0700 |
| commit | 991f76f837bf22c5bb07261cfd86525a0a96650c (patch) | |
| tree | aabd6397c35daee20d579507f4c5256e88e813ec /fs/mount.h | |
| parent | a937536b868b8369b98967929045f1df54234323 (diff) | |
| download | linux-3.10-991f76f837bf22c5bb07261cfd86525a0a96650c.tar.gz linux-3.10-991f76f837bf22c5bb07261cfd86525a0a96650c.tar.bz2 linux-3.10-991f76f837bf22c5bb07261cfd86525a0a96650c.zip | |
sysfs: fix race between readdir and lseek
While readdir() is running, lseek() may set filp->f_pos as zero,
then may leave filp->private_data pointing to one sysfs_dirent
object without holding its reference counter, so the sysfs_dirent
object may be used after free in next readdir().
This patch holds inode->i_mutex to avoid the problem since
the lock is always held in readdir path.
Reported-by: Dave Jones <davej@redhat.com>
Tested-by: Sasha Levin <levinsasha928@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/mount.h')
0 files changed, 0 insertions, 0 deletions