From b911884dd707ba1e6f641eb17857df3155013a45 Mon Sep 17 00:00:00 2001
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From: Daniel Axtens <dja@axtens.net>
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Date: Mon, 18 Jan 2021 17:27:18 +1100
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Subject: [PATCH] fs/btrfs: Squash some uninitialized reads
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We need to check errors before calling into a function that uses the result.
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Signed-off-by: Daniel Axtens <dja@axtens.net>
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Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
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Signed-off-by: Stefan Sørensen <stefan.sorensen@spectralink.com>
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---
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grub-core/fs/btrfs.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/grub-core/fs/btrfs.c b/grub-core/fs/btrfs.c
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index e4e87ba..d489cb0 100644
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--- a/grub-core/fs/btrfs.c
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+++ b/grub-core/fs/btrfs.c
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@@ -381,9 +381,9 @@ next (struct grub_btrfs_data *data,
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err = grub_btrfs_read_logical (data, grub_le_to_cpu64 (node.addr),
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&head, sizeof (head), 0);
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- check_btrfs_header (data, &head, grub_le_to_cpu64 (node.addr));
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if (err)
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return -err;
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+ check_btrfs_header (data, &head, grub_le_to_cpu64 (node.addr));
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save_ref (desc, grub_le_to_cpu64 (node.addr), 0,
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grub_le_to_cpu32 (head.nitems), !head.level);
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@@ -443,9 +443,9 @@ lower_bound (struct grub_btrfs_data *data,
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/* FIXME: preread few nodes into buffer. */
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err = grub_btrfs_read_logical (data, addr, &head, sizeof (head),
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recursion_depth + 1);
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- check_btrfs_header (data, &head, addr);
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if (err)
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return err;
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+ check_btrfs_header (data, &head, addr);
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addr += sizeof (head);
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if (head.level)
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{
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--
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2.14.2
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