From: Anand Jain <anand.jain@xxxxxxxxxx>
Segmentation fault with the following trace when csum-tree is
deliberately corrupted using btrfs-corrupt-block
read block failed check_tree_block
Couldn't setup csum tree
checking extents
Check tree block failed, want=29376512, have=0
::
read block failed check_tree_block <---- !!
Segmentation fault (core dumped) <--- !!
The below fix will redirect btrfsck user to use --init-csum-tree
when csum root is corrupted
---
btrfsck.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/btrfsck.c b/btrfsck.c
index 7aac736..6ced7b5 100644
--- a/btrfsck.c
+++ b/btrfsck.c
@@ -3483,6 +3483,10 @@ int main(int ac, char **av)
fprintf(stderr, "Critical roots corrupted, unable to fsck the FS\n");
return -EIO;
}
+ if (!extent_buffer_uptodate(info->csum_root->node) && !init_csum_tree) {
+ fprintf(stderr, "Checksum root corrupted, run 'btrfsck --init-csum-tree'\n");
+ return -EIO;
+ }
root = info->fs_root;
--
1.7.1
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