On Wed, Aug 28, 2024 at 07:14:11PM +0300, Fedor Pchelkin wrote: > The local extent changeset is passed to clear_record_extent_bits() where > it may have some additional memory dynamically allocated for ulist. When > qgroup is disabled, the memory is leaked because in this case the > changeset is not released upon __btrfs_qgroup_release_data() return. > > Since the recorded contents of the changeset are not used thereafter, just > don't pass it. > > Found by Linux Verification Center (linuxtesting.org) with Syzkaller. > > Reported-by: syzbot+81670362c283f3dd889c@xxxxxxxxxxxxxxxxxxxxxxxxx > Closes: https://lore.kernel.org/lkml/000000000000aa8c0c060ade165e@xxxxxxxxxx > Fixes: af0e2aab3b70 ("btrfs: qgroup: flush reservations during quota disable") > Cc: stable@xxxxxxxxxxxxxxx # 6.10+ > Signed-off-by: Fedor Pchelkin <pchelkin@xxxxxxxxx> > --- > v2: rework the fix as Qu Wenruo suggested - just don't pass unneeded > changeset. Update the commit title and description accordingly. Thanks, added to for-next.
