diff options
| author | Bart Van Assche <bvanassche@acm.org> | 2026-02-25 11:59:58 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-03-19 16:15:28 +0100 |
| commit | 35b0c8768e848e1b7e32052db36b5fa59b6a33a1 (patch) | |
| tree | e54669f002759b30332e20c2943319deadf1525e | |
| parent | 41fb97353ff58fa4f31904c343fc8e3df2f7517d (diff) | |
btrfs: add missing RCU unlock in error path in try_release_subpage_extent_buffer()
commit b2840e33127ce0eea880504b7f133e780f567a9b upstream.
Call rcu_read_lock() before exiting the loop in
try_release_subpage_extent_buffer() because there is a rcu_read_unlock()
call past the loop.
This has been detected by the Clang thread-safety analyzer.
Fixes: ad580dfa388f ("btrfs: fix subpage deadlock in try_release_subpage_extent_buffer()")
CC: stable@vger.kernel.org # 6.18+
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/btrfs/extent_io.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index f6cca3c97166..3e6be1911237 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -4475,6 +4475,7 @@ static int try_release_subpage_extent_buffer(struct folio *folio) */ if (!test_and_clear_bit(EXTENT_BUFFER_TREE_REF, &eb->bflags)) { spin_unlock(&eb->refs_lock); + rcu_read_lock(); break; } |