The patch along with all submitted patches for fuzzed image can be found at the following repo: https://github.com/adam900710/linux/tree/tree_checker_enhance Although fuzzed images are not really possible to happen in real world, it's still a pretty possible Deny of Service to attack the kernel, so we still need to address such problems. Instead of previous failed attempt to use cached eb to determine if we're allocating new tree blocks on already used tree block, this time we allow btrfs_tree_lock() to return error number to inform callers there is something wrong so we can exit a little more gracefully. This branch should address the 2nd wave of fuzzed images reported by Xu Wen. Please note, since extent tree corruption is the worst scenario, we still keep kernel to WARN() on such problem. But at least for that fuzzed image we can switched to RO other than deadlock the kernel. Qu Wenruo (1): btrfs: locking: Allow btrfs_tree_lock() to return error to avoid deadlock fs/btrfs/ctree.c | 57 +++++++++++++++++++++++++++++++------- fs/btrfs/extent-tree.c | 28 +++++++++++++++---- fs/btrfs/extent_io.c | 8 ++++-- fs/btrfs/free-space-tree.c | 4 ++- fs/btrfs/locking.c | 12 ++++++-- fs/btrfs/locking.h | 2 +- fs/btrfs/qgroup.c | 4 ++- fs/btrfs/relocation.c | 13 +++++++-- fs/btrfs/tree-log.c | 14 ++++++++-- 9 files changed, 114 insertions(+), 28 deletions(-) -- 2.18.0 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
