diff options
| author | WANG Cong <xiyou.wangcong@gmail.com> | 2017-01-23 11:17:35 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-12-01 09:48:05 +0100 |
| commit | 580c3e9a858e9ca5b5283755d910b9229d9b3224 (patch) | |
| tree | 6d78d86102b4676c45b52f5d46f9649cf35df22e /net/lapb/lapb_timer.c | |
| parent | b4575761960a0276e554c1d3a87dae103b52c445 (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>
Cc: Petr Vorel <pvorel@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/lapb/lapb_timer.c')
0 files changed, 0 insertions, 0 deletions