INFO: task syz-executor.1:570 blocked for more than 143 seconds. Not tainted 5.16.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:27088 pid: 570 ppid: 8031 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4972 [inline] __schedule+0xb72/0x1460 kernel/sched/core.c:6253 schedule+0x12b/0x1f0 kernel/sched/core.c:6326 blk_mq_freeze_queue_wait+0x105/0x190 block/blk-mq.c:178 nbd_add_socket+0x17b/0x8e0 drivers/block/nbd.c:1109 __nbd_ioctl drivers/block/nbd.c:1454 [inline] nbd_ioctl+0x263/0xb80 drivers/block/nbd.c:1511 blkdev_ioctl+0x3ac/0x790 block/ioctl.c:609 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f0fa7aa0ae9 RSP: 002b:00007f0fa5016188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f0fa7bb3f60 RCX: 00007f0fa7aa0ae9 RDX: 0000000000000004 RSI: 000000000000ab00 RDI: 0000000000000003 RBP: 00007f0fa7afaf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffc079ab3f R14: 00007f0fa5016300 R15: 0000000000022000 INFO: task syz-executor.1:573 blocked for more than 143 seconds. Not tainted 5.16.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:27088 pid: 573 ppid: 8031 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4972 [inline] __schedule+0xb72/0x1460 kernel/sched/core.c:6253 schedule+0x12b/0x1f0 kernel/sched/core.c:6326 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385 __mutex_lock_common+0xd1f/0x2590 kernel/locking/mutex.c:680 __mutex_lock kernel/locking/mutex.c:740 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:792 nbd_ioctl+0x148/0xb80 drivers/block/nbd.c:1504 blkdev_ioctl+0x3ac/0x790 block/ioctl.c:609 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f0fa7aa0ae9 RSP: 002b:00007f0fa4ff5188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f0fa7bb4020 RCX: 00007f0fa7aa0ae9 RDX: 0000000000000000 RSI: 000000000000ab08 RDI: 0000000000000005 RBP: 00007f0fa7afaf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffc079ab3f R14: 00007f0fa4ff5300 R15: 0000000000022000 INFO: task syz-executor.1:578 blocked for more than 143 seconds. Not tainted 5.16.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28688 pid: 578 ppid: 8031 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4972 [inline] __schedule+0xb72/0x1460 kernel/sched/core.c:6253 schedule+0x12b/0x1f0 kernel/sched/core.c:6326 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385 __mutex_lock_common+0xd1f/0x2590 kernel/locking/mutex.c:680 __mutex_lock kernel/locking/mutex.c:740 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:792 nbd_ioctl+0x148/0xb80 drivers/block/nbd.c:1504 blkdev_ioctl+0x3ac/0x790 block/ioctl.c:609 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f0fa7aa0ae9 RSP: 002b:00007f0fa4fd4188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f0fa7bb40e0 RCX: 00007f0fa7aa0ae9 RDX: ffffffffffffffff RSI: 000000000000ab00 RDI: 0000000000000005 RBP: 00007f0fa7afaf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffc079ab3f R14: 00007f0fa4fd4300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8cd1db00 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 1 lock held by in:imklog/6199: #0: ffff88801a98bc70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:990 2 locks held by kworker/u4:8/11826: #0: ffff8880b9b395d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x110 kernel/sched/core.c:478 #1: ffffc900055bfd20 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2273 4 locks held by kworker/0:10/15478: #0: ffff8880b9a395d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x110 kernel/sched/core.c:478 #1: ffff8880b9a27888 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x4c1/0x780 kernel/sched/psi.c:880 #2: ffffffff8cbea3a8 (&group->avgs_lock){+.+.}-{3:3}, at: psi_avgs_work+0xa2/0x220 kernel/sched/psi.c:433 #3: ffff8880b9a280d8 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x12a/0x270 kernel/time/timer.c:946 1 lock held by syz-executor.1/570: #0: ffff88801b65a198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x148/0xb80 drivers/block/nbd.c:1504 1 lock held by syz-executor.1/573: #0: ffff88801b65a198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x148/0xb80 drivers/block/nbd.c:1504 1 lock held by syz-executor.1/578: #0: ffff88801b65a198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x148/0xb80 drivers/block/nbd.c:1504 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106 nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xc82/0xcd0 kernel/hung_task.c:295 kthread+0x468/0x490 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 7723 Comm: kworker/0:5 Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events nsim_dev_trap_report_work RIP: 0010:kasan_check_range+0x4/0x2f0 mm/kasan/generic.c:188 Code: c7 e8 f0 2b 58 08 31 c0 c3 0f 0b b8 ea ff ff ff c3 0f 0b b8 ea ff ff ff c3 cc cc cc cc cc cc cc cc cc cc cc cc cc 41 57 41 56 <41> 55 41 54 53 b0 01 48 85 f6 0f 84 0d 02 00 00 48 89 fb 48 01 f3 RSP: 0018:ffffc90005abf848 EFLAGS: 00000046 RAX: 000000000000001c RBX: 0000000000000701 RCX: ffffffff8165e4df RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff901a6fc0 RBP: ffffc90005abf9b0 R08: dffffc0000000000 R09: fffffbfff2034ddf R10: fffffbfff2034ddf R11: 0000000000000000 R12: 0000000000000004 R13: 0000000000000001 R14: 0000000000000001 R15: ffff88806e5e8aa8 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007feba949a008 CR3: 000000001ee3b000 CR4: 00000000003506f0 Call Trace: instrument_atomic_read include/linux/instrumented.h:71 [inline] test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline] hlock_class kernel/locking/lockdep.c:199 [inline] check_wait_context kernel/locking/lockdep.c:4725 [inline] __lock_acquire+0x81f/0x2b00 kernel/locking/lockdep.c:4977 lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5637 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:354 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:813 [inline] nsim_dev_trap_report_work+0x701/0xaf0 drivers/net/netdevsim/dev.c:843 process_one_work+0x853/0x1140 kernel/workqueue.c:2298 worker_thread+0xac1/0x1320 kernel/workqueue.c:2445 kthread+0x468/0x490 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: e8 f0 2b 58 08 callq 0x8582bf5 5: 31 c0 xor %eax,%eax 7: c3 retq 8: 0f 0b ud2 a: b8 ea ff ff ff mov $0xffffffea,%eax f: c3 retq 10: 0f 0b ud2 12: b8 ea ff ff ff mov $0xffffffea,%eax 17: c3 retq 18: cc int3 19: cc int3 1a: cc int3 1b: cc int3 1c: cc int3 1d: cc int3 1e: cc int3 1f: cc int3 20: cc int3 21: cc int3 22: cc int3 23: cc int3 24: cc int3 25: 41 57 push %r15 27: 41 56 push %r14 * 29: 41 55 push %r13 <-- trapping instruction 2b: 41 54 push %r12 2d: 53 push %rbx 2e: b0 01 mov $0x1,%al 30: 48 85 f6 test %rsi,%rsi 33: 0f 84 0d 02 00 00 je 0x246 39: 48 89 fb mov %rdi,%rbx 3c: 48 01 f3 add %rsi,%rbx