diff options
| author | Jeremy Bongio <jbongio@google.com> | 2025-05-07 12:30:10 +0000 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2025-05-09 12:31:57 +0200 |
| commit | 04679f3c27e132c1a2d3881de2f0c5d7128de7c1 (patch) | |
| tree | 33f6b82e7d9fab09e0eef9d0698642da7e34d55b /lib/mpi/mpi-inline.c | |
| parent | 6ba0982c3235a047c953bf73a7b014af7840c4de (diff) | |
fs: Remove redundant errseq_set call in mark_buffer_write_io_error.
mark_buffer_write_io_error sets sb->s_wb_err to -EIO twice.
Once in mapping_set_error and once in errseq_set.
Only mapping_set_error checks if bh->b_assoc_map->host is NULL.
Discovered during null pointer dereference during writeback
to a failing device:
[<ffffffff9a416dc8>] ? mark_buffer_write_io_error+0x98/0xc0
[<ffffffff9a416dbe>] ? mark_buffer_write_io_error+0x8e/0xc0
[<ffffffff9ad4bda0>] end_buffer_async_write+0x90/0xd0
[<ffffffff9ad4e3eb>] end_bio_bh_io_sync+0x2b/0x40
[<ffffffff9adbafe6>] blk_update_request+0x1b6/0x480
[<ffffffff9adbb3d8>] blk_mq_end_request+0x18/0x30
[<ffffffff9adbc6aa>] blk_mq_dispatch_rq_list+0x4da/0x8e0
[<ffffffff9adc0a68>] __blk_mq_sched_dispatch_requests+0x218/0x6a0
[<ffffffff9adc07fa>] blk_mq_sched_dispatch_requests+0x3a/0x80
[<ffffffff9adbbb98>] blk_mq_run_hw_queue+0x108/0x330
[<ffffffff9adbcf58>] blk_mq_flush_plug_list+0x178/0x5f0
[<ffffffff9adb6741>] __blk_flush_plug+0x41/0x120
[<ffffffff9adb6852>] blk_finish_plug+0x22/0x40
[<ffffffff9ad47cb0>] wb_writeback+0x150/0x280
[<ffffffff9ac5343f>] ? set_worker_desc+0x9f/0xc0
[<ffffffff9ad4676e>] wb_workfn+0x24e/0x4a0
Fixes: 485e9605c0573 ("fs/buffer.c: record blockdev write errors in super_block that it backs")
Signed-off-by: Jeremy Bongio <jbongio@google.com>
Link: https://lore.kernel.org/20250507123010.1228243-1-jbongio@google.com
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'lib/mpi/mpi-inline.c')
0 files changed, 0 insertions, 0 deletions