diff mbox series

[5.12,117/700] fuse: reject internal errno

Message ID 20210712060941.472655185@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg KH July 12, 2021, 6:03 a.m. UTC 
From: Miklos Szeredi <mszeredi@redhat.com>

commit 49221cf86d18bb66fe95d3338cb33bd4b9880ca5 upstream.

Don't allow userspace to report errors that could be kernel-internal.

Reported-by: Anatoly Trosinenko <anatoly.trosinenko@gmail.com>
Fixes: 334f485df85a ("[PATCH] FUSE - device functions")
Cc: <stable@vger.kernel.org> # v2.6.14
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/fuse/dev.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -1867,7 +1867,7 @@  static ssize_t fuse_dev_do_write(struct
 	}
 
 	err = -EINVAL;
-	if (oh.error <= -1000 || oh.error > 0)
+	if (oh.error <= -512 || oh.error > 0)
 		goto copy_finish;
 
 	spin_lock(&fpq->lock);