INFO: task syz-executor.0:10201 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.0 state:D stack:23416 pid:10201 ppid: 6535 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 lo_release+0x114/0x1f0 drivers/block/loop.c:1768 blkdev_put_whole block/bdev.c:694 [inline] blkdev_put+0x477/0x7b0 block/bdev.c:956 kill_f2fs_super+0x2f9/0x3c0 fs/f2fs/super.c:4478 deactivate_locked_super+0xa7/0xf0 fs/super.c:335 mount_bdev+0x288/0x3a0 fs/super.c:1372 legacy_get_tree+0xea/0x180 fs/fs_context.c:610 vfs_get_tree+0x86/0x270 fs/super.c:1500 do_new_mount fs/namespace.c:2988 [inline] path_mount+0x1986/0x2c30 fs/namespace.c:3318 do_mount fs/namespace.c:3331 [inline] __do_sys_mount fs/namespace.c:3539 [inline] __se_sys_mount+0x308/0x3c0 fs/namespace.c:3516 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: 0033:0x7f65998b301a RSP: 002b:00007f6596e26fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f65998b301a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f6596e27000 RBP: 00007f6596e27040 R08: 00007f6596e27040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f6596e27000 R15: 0000000020000040 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8cb1dc00 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 3 locks held by kworker/u4:3/54: #0: ffff8880b9b395d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x110 kernel/sched/core.c:478 #1: ffff8880b9b27888 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x4c1/0x780 kernel/sched/psi.c:880 #2: ffff8880816acd40 (&wdev->mtx){+.+.}-{3:3}, at: sdata_lock net/mac80211/ieee80211_i.h:1013 [inline] #2: ffff8880816acd40 (&wdev->mtx){+.+.}-{3:3}, at: ieee80211_ibss_work+0xa0/0x14f0 net/mac80211/ibss.c:1681 1 lock held by systemd-journal/2967: 2 locks held by in:imklog/6214: 2 locks held by syz-executor.0/10201: #0: ffff88801acc6118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xfa/0x7b0 block/bdev.c:914 #1: ffff88801acc1b60 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_release+0x4d/0x1f0 drivers/block/loop.c:1748 ============================================= NMI backtrace for cpu 0 CPU: 0 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:111 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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 8310 Comm: kworker/u4:7 Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: phy14 ieee80211_iface_work RIP: 0010:_compound_head include/linux/page-flags.h:200 [inline] RIP: 0010:virt_to_head_page include/linux/mm.h:863 [inline] RIP: 0010:kasan_addr_to_page+0x36/0x50 mm/kasan/report.c:149 Code: ff ff 01 72 39 48 39 3d 28 71 f0 0e 76 30 e8 91 89 6b ff 48 c1 e8 06 48 83 e0 c0 48 ba 00 00 00 00 00 ea ff ff 48 8b 4c 10 08 <89> ce 83 e6 01 48 85 f6 75 04 48 01 d0 c3 48 ff c9 48 89 c8 c3 0f RSP: 0018:ffffc90000dc0ac0 EFLAGS: 00000006 RAX: 0000000001e92400 RBX: ffff88807a490800 RCX: ffffea00007a0d08 RDX: ffffea0000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff88807a490800 R08: ffffffff813bae57 R09: fffffbfff21d76b2 R10: fffffbfff21d76b2 R11: 0000000000000000 R12: 0000000000000005 R13: ffff88807a490800 R14: 0000000000000000 R15: ffff8880b9b3e200 FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f37add2b000 CR3: 000000006f95b000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __kasan_record_aux_stack+0x11/0x130 mm/kasan/generic.c:333 insert_work+0x54/0x400 kernel/workqueue.c:1354 __queue_work+0x928/0xc60 kernel/workqueue.c:1520 call_timer_fn+0xf6/0x210 kernel/time/timer.c:1421 expire_timers kernel/time/timer.c:1461 [inline] __run_timers+0x752/0x910 kernel/time/timer.c:1734 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1747 __do_softirq+0x392/0x7a3 kernel/softirq.c:558 __irq_exit_rcu+0xec/0x170 kernel/softirq.c:636 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202 Code: 71 54 fd ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 6e 83 51 f7 48 89 df e8 76 34 53 f7 e8 a1 8c 76 f7 fb bf 01 00 00 00 56 8f 45 f7 65 8b 05 57 eb ed 75 85 c0 74 02 5b c3 e8 dc d2 eb RSP: 0018:ffffc90016f07c50 EFLAGS: 00000282 RAX: 9cc74533f7c7b400 RBX: ffff888011469800 RCX: ffffffff90bb1903 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffffc90016f07dd0 R08: ffffffff818b1130 R09: ffffed100228d301 R10: ffffed100228d301 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff888015b817c8 R14: ffff888015b817c8 R15: ffff88801439fd00 process_one_work+0x7c2/0x1140 kernel/workqueue.c:2271 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: ff 01 incl (%rcx) 2: 72 39 jb 0x3d 4: 48 39 3d 28 71 f0 0e cmp %rdi,0xef07128(%rip) # 0xef07133 b: 76 30 jbe 0x3d d: e8 91 89 6b ff callq 0xff6b89a3 12: 48 c1 e8 06 shr $0x6,%rax 16: 48 83 e0 c0 and $0xffffffffffffffc0,%rax 1a: 48 ba 00 00 00 00 00 movabs $0xffffea0000000000,%rdx 21: ea ff ff 24: 48 8b 4c 10 08 mov 0x8(%rax,%rdx,1),%rcx * 29: 89 ce mov %ecx,%esi <-- trapping instruction 2b: 83 e6 01 and $0x1,%esi 2e: 48 85 f6 test %rsi,%rsi 31: 75 04 jne 0x37 33: 48 01 d0 add %rdx,%rax 36: c3 retq 37: 48 ff c9 dec %rcx 3a: 48 89 c8 mov %rcx,%rax 3d: c3 retq 3e: 0f .byte 0xf