tree 9c10bbad25bbb8f3b40bd25ec3aadf8f0c0a4324
parent b4f90189dc2c7a7e6926ea480ae3404ec3de4581
author Renaud Lottiaux <renaud.lottiaux@kerlabs.com> 1246387294 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1246413360 -0700

bsdacct: fix access to invalid filp in acct_on()

The file opened in acct_on and freshly stored in the ns->bacct struct can
be closed in acct_file_reopen by a concurrent call after we release
acct_lock and before we call mntput(file->f_path.mnt).

Record file->f_path.mnt in a local variable and use this variable only.

Signed-off-by: Renaud Lottiaux <renaud.lottiaux@kerlabs.com>
Signed-off-by: Louis Rilling <louis.rilling@kerlabs.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>