From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: B Horn Date: Sun, 12 May 2024 06:37:08 +0100 Subject: [PATCH] fs/iso9660: Set a grub_errno if mount fails It was possible for a grub_errno to not be set if mount of an ISO 9660 filesystem failed when set_rockridge() returned 0. This isn't known to be exploitable as the other filesystems due to filesystem helper checking the requested file type. Though fixing as a precaution. Reported-by: B Horn Signed-off-by: B Horn Reviewed-by: Daniel Kiper --- grub-core/fs/iso9660.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/grub-core/fs/iso9660.c b/grub-core/fs/iso9660.c index ac011950a..82cf1a271 100644 --- a/grub-core/fs/iso9660.c +++ b/grub-core/fs/iso9660.c @@ -491,6 +491,9 @@ grub_iso9660_mount (grub_disk_t disk) return data; fail: + if (grub_errno == GRUB_ERR_NONE) + grub_error (GRUB_ERR_BAD_FS, "not a ISO9660 filesystem"); + grub_free (data); return 0; }