fs/pipe.c: local vars have to match types of proper pipe_inode_info f…

…ields head, tail, ring_size are declared as unsigned int, so all local variables that operate with these fields have to be unsigned to avoid signed integer overflow. Right now, it isn't an issue because the maximum pipe size is limited by 1U<<31. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Andrei Vagin <[email protected]> Suggested-by: Dmitry Safonov <[email protected]> Acked-by: Christian Brauner <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
josf · Mar 24, 2022 · aeb213c · aeb213c
1 parent 5a519c8
commit aeb213c
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/fs/pipe.c b/fs/pipe.c
@@ -607,7 +607,7 @@ pipe_write(struct kiocb *iocb, struct iov_iter *from)
 static long pipe_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 {
 	struct pipe_inode_info *pipe = filp->private_data;
-	int count, head, tail, mask;
+	unsigned int count, head, tail, mask;
 
 	switch (cmd) {
 	case FIONREAD:
@@ -829,7 +829,7 @@ struct pipe_inode_info *alloc_pipe_info(void)
 
 void free_pipe_info(struct pipe_inode_info *pipe)
 {
-	int i;
+	unsigned int i;
 
 #ifdef CONFIG_WATCH_QUEUE
 	if (pipe->watch_queue)