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[2003:f6:f71a:eb00:fa63:3fff:fe02:74c]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-37d08234048sm3246607f8f.47.2024.10.04.06.19.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 04 Oct 2024 06:19:12 -0700 (PDT) From: Johannes Thumshirn To: Chris Mason , Josef Bacik , David Sterba , linux-btrfs@vger.kernel.org (open list:BTRFS FILE SYSTEM), linux-kernel@vger.kernel.org (open list) Cc: Qu Wenruo , Naohiro Aota , Johannes Thumshirn , Filipe Manana Subject: [PATCH v3] btrfs: don't BUG_ON() NOCOW ordered-extents with checksum list Date: Fri, 4 Oct 2024 15:19:01 +0200 Message-ID: <20241004131901.21720-1-jth@kernel.org> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Johannes Thumshirn Currently we BUG_ON() in btrfs_finish_one_ordered() if we finishing an ordered-extent that is flagged as NOCOW, but it's checsum list is non-empty. This is clearly a logic error which we can recover from by aborting the transaction. For developer builds which enable CONFIG_BTRFS_ASSERT, also ASSERT() that t= he list is empty. Suggested-by: Filipe Manana Signed-off-by: Johannes Thumshirn Reviewed-by: Qu Wenruo Reviewed-by: Filipe Manana --- Changes to v2: * Move ASSERT() out of if () block (Filipe) * goto 'out' after aborting the transaction (Filipe) Changes to v1: * Fixup if () and ASSERT() (Qu) * Fix spelling of 'Currently' --- fs/btrfs/inode.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 103ec917ca9d..ef82579dfe09 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -3088,7 +3088,12 @@ int btrfs_finish_one_ordered(struct btrfs_ordered_ex= tent *ordered_extent) =20 if (test_bit(BTRFS_ORDERED_NOCOW, &ordered_extent->flags)) { /* Logic error */ - BUG_ON(!list_empty(&ordered_extent->list)); + ASSERT(list_empty(&ordered_extent->list)); + if (!list_empty(&ordered_extent->list)) { + ret =3D -EINVAL; + btrfs_abort_transaction(trans, ret); + goto out; + } =20 btrfs_inode_safe_disk_i_size_write(inode, 0); ret =3D btrfs_update_inode_fallback(trans, inode); --=20 2.43.0