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authorTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>2022-09-20 22:43:51 +0900
committerDavid Sterba <dsterba@suse.com>2022-09-29 17:08:31 +0200
commitcbddcc4fa3443fe8cfb2ff8e210deb1f6a0eea38 (patch)
tree3bbcdb1c58e7d96e0cc5f9d4ba439e7c1c9ac285 /fs/verity
parentdb21370bffbc966253ba32edb112f4beec1531cc (diff)
btrfs: set generation before calling btrfs_clean_tree_block in btrfs_init_new_buffer
syzbot is reporting uninit-value in btrfs_clean_tree_block() [1], for commit bc877d285ca3dba2 ("btrfs: Deduplicate extent_buffer init code") missed that btrfs_set_header_generation() in btrfs_init_new_buffer() must not be moved to after clean_tree_block() because clean_tree_block() is calling btrfs_header_generation() since commit 55c69072d6bd5be1 ("Btrfs: Fix extent_buffer usage when nodesize != leafsize"). Since memzero_extent_buffer() will reset "struct btrfs_header" part, we can't move btrfs_set_header_generation() to before memzero_extent_buffer(). Just re-add btrfs_set_header_generation() before btrfs_clean_tree_block(). Link: https://syzkaller.appspot.com/bug?extid=fba8e2116a12609b6c59 [1] Reported-by: syzbot <syzbot+fba8e2116a12609b6c59@syzkaller.appspotmail.com> Fixes: bc877d285ca3dba2 ("btrfs: Deduplicate extent_buffer init code") CC: stable@vger.kernel.org # 4.19+ Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/verity')
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