From: Eric W. Biederman <ebiederm@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Eric W. Biederman <ebiederm@xxxxxxxxxxxxxxxxxx> --- fs/locks.c | 8 +++++++- 1 files changed, 7 insertions(+), 1 deletions(-) diff --git a/fs/locks.c b/fs/locks.c index ec3deea..f74794e 100644 --- a/fs/locks.c +++ b/fs/locks.c @@ -1584,9 +1584,13 @@ SYSCALL_DEFINE2(flock, unsigned int, fd, unsigned int, cmd) !(filp->f_mode & (FMODE_READ|FMODE_WRITE))) goto out_putf; + error = -EIO; + if (!file_hotplug_read_trylock(filp)) + goto out_putf; + error = flock_make_lock(filp, &lock, cmd); if (error) - goto out_putf; + goto out_unlock; if (can_sleep) lock->fl_flags |= FL_SLEEP; @@ -1604,6 +1608,8 @@ SYSCALL_DEFINE2(flock, unsigned int, fd, unsigned int, cmd) out_free: locks_free_lock(lock); + out_unlock: + file_hotplug_read_unlock(filp); out_putf: fput(filp); out: -- 1.6.3.1.54.g99dd.dirty -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
