admin/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2025-12-07 20:06:24 +00:00
Code Issues Packages Projects Releases Wiki Activity

btrfs: exit after state insertion failure at set_extent_bit()

Browse Source 
If insert_state() state failed it returns an error pointer and we call
extent_io_tree_panic() which will trigger a BUG() call. However if
CONFIG_BUG is disabled, which is an uncommon and exotic scenario, then
we fallthrough and call cache_state() which will dereference the error
pointer, resulting in an invalid memory access.

So jump to the 'out' label after calling extent_io_tree_panic(), it also
makes the code more clear besides dealing with the exotic scenario where
CONFIG_BUG is disabled.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Filipe Manana
2025-04-16 15:56:53 +01:00
committed by David Sterba
parent 0edc1a5c54
commit 67f10a1018
1 changed files with 1 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
fs/btrfs/extent-io-tree.c
View File

@@ -1223,6 +1223,7 @@ hit_next:
if (IS_ERR(inserted_state)) {
ret = PTR_ERR(inserted_state);
extent_io_tree_panic(tree, prealloc, "insert", ret);
goto out;
}
cache_state(inserted_state, cached_state);