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author | piaojun <piaojun@huawei.com> | 2018-01-31 16:14:59 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-01-31 17:18:35 -0800 |
commit | 16c8d569f5704a84164f30ff01b29879f3438065 (patch) | |
tree | c775e1a2cdba767c6d66b054eccbcc131ad428c3 /net/sched/act_police.c | |
parent | d22aa61549036c1dfb47c04c0766630b128efe40 (diff) | |
download | linux-16c8d569f5704a84164f30ff01b29879f3438065.tar.gz |
ocfs2/acl: use 'ip_xattr_sem' to protect getting extended attribute
The race between *set_acl and *get_acl will cause getting incomplete
xattr data as below:
processA processB
ocfs2_set_acl
ocfs2_xattr_set
__ocfs2_xattr_set_handle
ocfs2_get_acl_nolock
ocfs2_xattr_get_nolock:
processB may get incomplete xattr data if processA hasn't set_acl done.
So we should use 'ip_xattr_sem' to protect getting extended attribute in
ocfs2_get_acl_nolock(), as other processes could be changing it
concurrently.
Link: http://lkml.kernel.org/r/5A5DDCFF.7030001@huawei.com
Signed-off-by: Jun Piao <piaojun@huawei.com>
Reviewed-by: Alex Chen <alex.chen@huawei.com>
Cc: Mark Fasheh <mfasheh@versity.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <jiangqi903@gmail.com>
Cc: Changwei Ge <ge.changwei@h3c.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'net/sched/act_police.c')
0 files changed, 0 insertions, 0 deletions