From 498830861020ac6b713d002bb2e72f713860ea04 Mon Sep 17 00:00:00 2001 From: Daniel Axtens Date: Mon, 18 Jan 2021 17:27:18 +1100 Subject: [PATCH] fs/btrfs: Squash some uninitialized reads We need to check errors before calling into a function that uses the result. Reference: http://git.savannah.gnu.org/cgit/grub.git/commit/?id=b911884dd707ba1e6f641eb17857df3155013a45 Signed-off-by: Daniel Axtens Reviewed-by: Daniel Kiper --- grub-core/fs/btrfs.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/grub-core/fs/btrfs.c b/grub-core/fs/btrfs.c index a6384a8..cf3647a 100644 --- a/grub-core/fs/btrfs.c +++ b/grub-core/fs/btrfs.c @@ -410,9 +410,9 @@ next (struct grub_btrfs_data *data, err = grub_btrfs_read_logical (data, grub_le_to_cpu64 (node.addr), &head, sizeof (head), 0); - check_btrfs_header (data, &head, grub_le_to_cpu64 (node.addr)); if (err) return -err; + check_btrfs_header (data, &head, grub_le_to_cpu64 (node.addr)); save_ref (desc, grub_le_to_cpu64 (node.addr), 0, grub_le_to_cpu32 (head.nitems), !head.level); @@ -472,9 +472,9 @@ lower_bound (struct grub_btrfs_data *data, /* FIXME: preread few nodes into buffer. */ err = grub_btrfs_read_logical (data, addr, &head, sizeof (head), recursion_depth + 1); - check_btrfs_header (data, &head, addr); if (err) return err; + check_btrfs_header (data, &head, addr); addr += sizeof (head); if (head.level) { -- 2.19.1