| From 49221cf86d18bb66fe95d3338cb33bd4b9880ca5 Mon Sep 17 00:00:00 2001 |
| From: Miklos Szeredi <mszeredi@redhat.com> |
| Date: Tue, 22 Jun 2021 09:15:35 +0200 |
| Subject: fuse: reject internal errno |
| |
| 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(-) |
| |
| --- a/fs/fuse/dev.c |
| +++ b/fs/fuse/dev.c |
| @@ -1871,7 +1871,7 @@ 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); |
