blk_update_request: I/O error, dev nbd0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev nbd0, logical block 0, async page read
------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: CPU: 0 PID: 149 at lib/refcount.c:28 refcount_warn_saturate+0x1c8/0x20c lib/refcount.c:28
Modules linked in:
CPU: 0 PID: 149 Comm: kworker/0:1H Not tainted 5.15.168-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: kblockd blk_mq_run_work_fn
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : refcount_warn_saturate+0x1c8/0x20c lib/refcount.c:28
lr : refcount_warn_saturate+0x1c8/0x20c lib/refcount.c:28
sp : ffff80001d777590
x29: ffff80001d777590 x28: fffffbffeffd0200 x27: 1fffe000196c11c3
x26: 1fffe000196c11c3 x25: 0000000000000000 x24: 0000000000000001
x23: dfff800000000000 x22: fffffbffeffd02c8 x21: 0000000000000003
x20: ffff0000cb608ee8 x19: ffff800016efe000 x18: 0000000000000001
x17: 0000000000000000 x16: ffff8000083364dc x15: 00000000ffffffff
x14: ffff0000c2f20000 x13: 0000000000000001 x12: 0000000000000001
x11: 0000000000000000 x10: 0000000000000000 x9 : 04420e9a2ca60100
x8 : 04420e9a2ca60100 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff80001d776cf8 x4 : ffff800014b905e0 x3 : ffff800008336628
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026
Call trace:
 refcount_warn_saturate+0x1c8/0x20c lib/refcount.c:28
 __refcount_sub_and_test include/linux/refcount.h:283 [inline]
 __refcount_dec_and_test include/linux/refcount.h:315 [inline]
 refcount_dec_and_test include/linux/refcount.h:333 [inline]
 blk_mq_free_request+0x440/0x584 block/blk-mq.c:543
 __blk_mq_end_request+0x318/0x350 block/blk-mq.c:568
 blk_mq_end_request block/blk-mq.c:577 [inline]
 blk_mq_dispatch_rq_list+0x9c8/0x14ac block/blk-mq.c:1408
 __blk_mq_do_dispatch_sched block/blk-mq-sched.c:200 [inline]
 blk_mq_do_dispatch_sched+0x8b4/0x9f4 block/blk-mq-sched.c:214
 __blk_mq_sched_dispatch_requests+0x310/0x420
 blk_mq_sched_dispatch_requests+0xbc/0x138 block/blk-mq-sched.c:366
 __blk_mq_run_hw_queue block/blk-mq.c:1511 [inline]
 blk_mq_run_work_fn+0x150/0x208 block/blk-mq.c:1842
 process_one_work+0x790/0x11b8 kernel/workqueue.c:2310
 worker_thread+0x910/0x1034 kernel/workqueue.c:2457
 kthread+0x37c/0x45c kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870
irq event stamp: 2756
hardirqs last  enabled at (2755): [<ffff80000832c128>] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:257
hardirqs last disabled at (2756): [<ffff800011ab7150>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (2714): [<ffff8000081b691c>] softirq_handle_end kernel/softirq.c:401 [inline]
softirqs last  enabled at (2714): [<ffff8000081b691c>] handle_softirqs+0xb88/0xdbc kernel/softirq.c:586
softirqs last disabled at (2679): [<ffff8000081b6fb4>] __do_softirq kernel/softirq.c:592 [inline]
softirqs last disabled at (2679): [<ffff8000081b6fb4>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (2679): [<ffff8000081b6fb4>] invoke_softirq kernel/softirq.c:439 [inline]
softirqs last disabled at (2679): [<ffff8000081b6fb4>] __irq_exit_rcu+0x268/0x4d8 kernel/softirq.c:641
---[ end trace 106db5bf2a4cd798 ]---
blk_update_request: I/O error, dev nbd0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev nbd0, logical block 0, async page read