Hi,
there is a kernel crash during when running our cryptsetup testsuite
if using veritysetup with --use-tasklets option (try_verify_in_tasklet table option).
With
# veritysetup format /dev/sdb /dev/sdc
# veritysetup open /dev/sdb test /dev/sdc --use-tasklets <root_hash>
it generates BUG below, bisect point to
450e8dee51aa6fa1dd0f64073e88235f1a77b035 is the first bad commit
commit 450e8dee51aa6fa1dd0f64073e88235f1a77b035
Author: Joe Thornber <ejt@xxxxxxxxxx>
Date: Fri Mar 10 16:02:29 2023 +0000
dm bufio: improve concurrent IO performance
So, it is broken since kernel 6.4 ... !
(I wonder why we added dm-verity tasklet option when nobody apparently use it...)
: =============================
: [ BUG: Invalid wait context ]
: 6.6.0+ #170 Not tainted
: -----------------------------
: ksoftirqd/2/25 is trying to lock:
: ffff88810f57c6f8 (&bc->trees[i].lock){.+.+}-{3:3}, at: cache_get+0x46/0xc0 [dm_bufio]
: other info that might help us debug this:
: context-{2:2}
: no locks held by ksoftirqd/2/25.
: stack backtrace:
: CPU: 2 PID: 25 Comm: ksoftirqd/2 Not tainted 6.6.0+ #170
: Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 11/12/2020
: Call Trace:
: <TASK>
: dump_stack_lvl+0x5c/0xc0
: dump_stack+0x10/0x20
: __lock_acquire+0xa3f/0x2800
: lock_acquire+0xd8/0x2d0
: ? cache_get+0x46/0xc0 [dm_bufio]
: ? __this_cpu_preempt_check+0x13/0x20
: down_read+0x30/0x270
: ? cache_get+0x46/0xc0 [dm_bufio]
: cache_get+0x46/0xc0 [dm_bufio]
: new_read+0x53/0x1d0 [dm_bufio]
: dm_bufio_get+0x11/0x20 [dm_bufio]
: verity_verify_level+0x17d/0x230 [dm_verity]
: verity_hash_for_block+0x37/0xe0 [dm_verity]
: verity_verify_io+0x124/0x5d0 [dm_verity]
: ? find_held_lock+0x31/0x80
: ? __this_cpu_preempt_check+0x13/0x20
: ? percpu_ref_put_many.constprop.0+0x6a/0x110
: ? blk_queue_exit+0xd/0x10
: ? __blk_mq_free_request+0x65/0xc0
: ? tasklet_action_common.isra.0+0x34/0x250
: verity_tasklet+0x11/0x90 [dm_verity]
: tasklet_action_common.isra.0+0xdf/0x250
: tasklet_action+0x28/0x30
: __do_softirq+0xcf/0x459
: run_ksoftirqd+0x32/0x50
: smpboot_thread_fn+0x17c/0x220
: ? sort_range+0x20/0x20
: kthread+0xfc/0x130
: ? kthread_complete_and_exit+0x20/0x20
: ret_from_fork+0x31/0x50
: ? kthread_complete_and_exit+0x20/0x20
: ret_from_fork_asm+0x11/0x20
: </TASK>
Thanks,
Milan
