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authorpiaojun <piaojun@huawei.com>2018-01-31 16:14:59 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-05-30 07:50:23 +0200
commit1d5fdc1307eeb04b334c5dc23e11dbd6068d90eb (patch)
tree2034db72c7e2ea444f12883cfe7fb560c94375dd /fs/squashfs/decompressor_multi.c
parente2afc4063eaa4c5b2b2c51ad8540db8d08d119c5 (diff)
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ocfs2/acl: use 'ip_xattr_sem' to protect getting extended attribute
[ Upstream commit 16c8d569f5704a84164f30ff01b29879f3438065 ] 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> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/squashfs/decompressor_multi.c')
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