signalfd: fix error return code

If anon_inode_getfile() fails, return appropriate error code. This looks
like a single typo: the similar code changes in timerfd and userfaultfd
are okay.

Found by Linux Verification Center (linuxtesting.org).

Fixes: fbe38120eb1d ("signalfd: convert to ->read_iter()")
Signed-off-by: Fedor Pchelkin <pchelkin@ispras.ru>
Link: https://lore.kernel.org/r/20240520090819.76342-1-pchelkin@ispras.ru
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Christian Brauner <brauner@kernel.org>

diff --git a/fs/signalfd.c b/fs/signalfd.c
index 4a5614442dbfa733ff2dc9fa704532e8b5cc147c..65fe5eed0be4cd30f239d0e8f9451a090779495b 100644 (file)
--- a/fs/signalfd.c
+++ b/fs/signalfd.c
@@ -282,7 +282,7 @@ static int do_signalfd4(int ufd, sigset_t *mask, int flags)
                if (IS_ERR(file)) {
                        put_unused_fd(ufd);
                        kfree(ctx);
-                       return ufd;
+                       return PTR_ERR(file);
                }
                file->f_mode |= FMODE_NOWAIT;