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| author | WANG Cong <xiyou.wangcong@gmail.com> | 2017-01-23 11:17:35 -0800 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-07-04 11:51:31 +0200 |
| commit | 8856b3e0e8482eb3ffed8ef733bae0f3877a4d71 (patch) | |
| tree | f26aab84d06768aa86ad0f1ab7d250223a8797de /scripts/diffconfig | |
| parent | e450a7d4b9603956a98e80b54906a214bb4c50ed (diff) | |
af_unix: move unix_mknod() out of bindlock
commit 0fb44559ffd67de8517098b81f675fa0210f13f0 upstream.
Dmitry reported a deadlock scenario:
unix_bind() path:
u->bindlock ==> sb_writer
do_splice() path:
sb_writer ==> pipe->mutex ==> u->bindlock
In the unix_bind() code path, unix_mknod() does not have to
be done with u->bindlock held, since it is a pure fs operation,
so we can just move unix_mknod() out.
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Tested-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Rainer Weikusat <rweikusat@mobileactivedefense.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Diffstat (limited to 'scripts/diffconfig')
0 files changed, 0 insertions, 0 deletions