diff options
| author | WANG Cong <xiyou.wangcong@gmail.com> | 2017-01-23 11:17:35 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-02-04 09:45:09 +0100 |
| commit | 0492a033fb71b5ef0573aa157aadda049e8a7770 (patch) | |
| tree | e3ed6418ab81fa0ed94a02ee7eeab1f3ba3c536e /drivers/net | |
| parent | e674c70bafe78f96ca63b645b7881744c82b5586 (diff) | |
af_unix: move unix_mknod() out of bindlock
[ Upstream commit 0fb44559ffd67de8517098b81f675fa0210f13f0 ]
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/net')
0 files changed, 0 insertions, 0 deletions