From 070bde486ee469d15545ab65c8e3d1be7426bd2c Mon Sep 17 00:00:00 2001 From: Julia Lawall Date: Wed, 26 May 2010 17:54:39 +0200 Subject: [PATCH] fs: Add missing mutex_unlock Add a mutex_unlock missing on the error path. At other exists from the function that return an error flag, the mutex is unlocked, so do the same here. The semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // @@ expression E1; @@ * mutex_lock(E1,...); <+... when != E1 if (...) { ... when != E1 * return ...; } ...+> * mutex_unlock(E1,...); // Signed-off-by: Julia Lawall Signed-off-by: Al Viro --- fs/pipe.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/fs/pipe.c b/fs/pipe.c index d79872eba09a5..60da077400f1d 100644 --- a/fs/pipe.c +++ b/fs/pipe.c @@ -1169,14 +1169,18 @@ long pipe_fcntl(struct file *file, unsigned int cmd, unsigned long arg) switch (cmd) { case F_SETPIPE_SZ: - if (!capable(CAP_SYS_ADMIN) && arg > pipe_max_pages) - return -EINVAL; + if (!capable(CAP_SYS_ADMIN) && arg > pipe_max_pages) { + ret = -EINVAL; + goto out; + } /* * The pipe needs to be at least 2 pages large to * guarantee POSIX behaviour. */ - if (arg < 2) - return -EINVAL; + if (arg < 2) { + ret = -EINVAL; + goto out; + } ret = pipe_set_size(pipe, arg); break; case F_GETPIPE_SZ: @@ -1187,6 +1191,7 @@ long pipe_fcntl(struct file *file, unsigned int cmd, unsigned long arg) break; } +out: mutex_unlock(&pipe->inode->i_mutex); return ret; } -- 2.39.5