watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.5:30594] Modules linked in: irq event stamp: 3082135 hardirqs last enabled at (3082134): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (3082135): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (3067296): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (3067299): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (3067299): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 30594 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:preempt_count_add+0x3b/0x190 kernel/sched/core.c:3230 Code: 60 37 24 8d 48 89 da 48 c1 ea 03 0f b6 14 02 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 2a 01 00 00 8b 0d 05 c9 e2 0b <85> c9 75 07 65 8b 05 ea 70 c0 7e 48 b8 00 00 00 00 00 fc ff df 48 RSP: 0018:ffff8880ba0078f0 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000003 RBX: ffffffff8d243760 RCX: 0000000000000000 RDX: 0000000000000004 RSI: 0000000000000004 RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffed101740455a R10: ffff8880ba022ad3 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000001 R14: ffff8880a4bc7d00 R15: ffff8880ba007dd8 FS: 00007fd7639c4700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd7639a2ff8 CR3: 000000020df1b000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lockdep_current_cpu_online kernel/rcu/tree.c:1076 [inline] rcu_lockdep_current_cpu_online+0x32/0x1b0 kernel/rcu/tree.c:1068 rcu_read_lock_held+0xc3/0x110 kernel/rcu/update.c:285 ieee80211_rx_h_decrypt net/mac80211/rx.c:1885 [inline] ieee80211_rx_handlers+0x5e1b/0x9730 net/mac80211/rx.c:3676 ieee80211_invoke_rx_handlers net/mac80211/rx.c:3726 [inline] ieee80211_prepare_and_rx_handle+0x23fa/0x6790 net/mac80211/rx.c:4423 __ieee80211_rx_handle_packet net/mac80211/rx.c:4483 [inline] ieee80211_rx_napi+0x108d/0x2470 net/mac80211/rx.c:4672 ieee80211_rx include/net/mac80211.h:4109 [inline] ieee80211_tasklet_handler+0x101/0x160 net/mac80211/main.c:229 tasklet_action_common.constprop.0+0x265/0x360 kernel/softirq.c:522 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:ns_test_super+0x29/0x50 fs/super.c:1047 Code: 90 55 48 89 f5 53 48 89 fb e8 a3 4e bf ff 48 8d bb 80 06 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <75> 0f 31 c0 48 39 ab 80 06 00 00 5b 5d 0f 94 c0 c3 e8 61 2b f5 ff RSP: 0018:ffff8881ec9f79b0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff888010606cc0 RCX: ffffc9001071d000 RDX: 1ffff110020c0e68 RSI: ffffffff81a336cd RDI: ffff888010607340 RBP: ffff888012a8e478 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000005 R11: 00000000e79d86ea R12: ffff888010606cc0 R13: ffffffff8a066ca8 R14: ffff8880512c8fd0 R15: dffffc0000000000 sget_userns+0x300/0xcd0 fs/super.c:504 mount_ns+0x8d/0x1d0 fs/super.c:1068 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] kern_mount_data+0x55/0xd0 fs/namespace.c:3278 pid_ns_prepare_proc+0x1a/0x90 fs/proc/root.c:214 alloc_pid+0x721/0x8f0 kernel/pid.c:208 copy_process.part.0+0x3bc0/0x8260 kernel/fork.c:1927 copy_process kernel/fork.c:1710 [inline] _do_fork+0x22f/0xf30 kernel/fork.c:2219 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fd76644eae9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd7639c4188 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fd766561f60 RCX: 00007fd76644eae9 RDX: 9999999999999999 RSI: 0000000000000000 RDI: 0004000030006dfd RBP: 00007fd7664a8f6d R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd417ac21f R14: 00007fd7639c4300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 30601 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:reacquire_held_locks+0x0/0x430 kernel/locking/lockdep.c:3551 Code: c7 68 83 f1 89 e8 b0 2a 4d 00 e9 26 ea ff ff 4c 8d bc 24 d8 00 00 00 4c 89 ff e8 7b 51 ff ff e9 c7 f0 ff ff 66 0f 1f 44 00 00 <48> 63 c2 39 d6 48 8d 04 80 48 8d 84 c7 88 08 00 00 0f 86 89 02 00 RSP: 0018:ffff8880ba107df0 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffffffff8d243760 RCX: 1ffff11009412d63 RDX: 0000000000000003 RSI: 0000000000000003 RDI: ffff88804a096240 RBP: 0000000000000002 R08: ffffffff8cd56d78 R09: 0000000000000001 R10: 0000000000000000 R11: ffffffff8c66505b R12: 1ffff11017420fc2 R13: b6426ceb46065a36 R14: ffff88804a096240 R15: 0000000000000003 FS: 00007fe688db2700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f54e7173718 CR3: 00000001e9618000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __lock_release kernel/locking/lockdep.c:3707 [inline] lock_release+0x379/0x8b0 kernel/locking/lockdep.c:3927 seqcount_lockdep_reader_access include/linux/seqlock.h:82 [inline] read_seqcount_begin include/linux/seqlock.h:164 [inline] ktime_get_update_offsets_now+0xe3/0x460 kernel/time/timekeeping.c:2225 hrtimer_update_base kernel/time/hrtimer.c:621 [inline] hrtimer_interrupt+0x138/0x9e0 kernel/time/hrtimer.c:1567 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1071 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1096 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:435 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x3a6/0xae0 kernel/locking/qspinlock.c:474 Code: eb c6 45 01 01 41 bc 00 80 00 00 48 c1 e9 03 83 e3 07 41 be 01 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8d 2c 01 eb 0c f3 90 <41> 83 ec 01 0f 84 38 04 00 00 41 0f b6 45 00 38 d8 7f 08 84 c0 0f RSP: 0018:ffff8881f7f9f8c0 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000003 RBX: 0000000000000000 RCX: 1ffffffff140787c RDX: 0000000000000001 RSI: ffffffff8167a995 RDI: 0000000000000286 RBP: ffffffff8a03c3e0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 000000000000249c R13: fffffbfff140787c R14: 0000000000000001 R15: ffff8880ba12be00 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:679 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:53 [inline] queued_spin_lock include/asm-generic/qspinlock.h:88 [inline] do_raw_spin_lock+0x189/0x220 kernel/locking/spinlock_debug.c:113 spin_lock include/linux/spinlock.h:329 [inline] sget_userns+0xcc/0xcd0 fs/super.c:501 mount_ns+0x8d/0x1d0 fs/super.c:1068 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] kern_mount_data+0x55/0xd0 fs/namespace.c:3278 pid_ns_prepare_proc+0x1a/0x90 fs/proc/root.c:214 alloc_pid+0x721/0x8f0 kernel/pid.c:208 copy_process.part.0+0x3bc0/0x8260 kernel/fork.c:1927 copy_process kernel/fork.c:1710 [inline] _do_fork+0x22f/0xf30 kernel/fork.c:2219 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fe68b83cae9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe688db2188 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fe68b94ff60 RCX: 00007fe68b83cae9 RDX: 9999999999999999 RSI: 0000000000000000 RDI: 0004000030006dfd RBP: 00007fe68b896f6d R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffff85c32ef R14: 00007fe688db2300 R15: 0000000000022000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 24 8d and $0x8d,%al 2: 48 89 da mov %rbx,%rdx 5: 48 c1 ea 03 shr $0x3,%rdx 9: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx d: 48 89 d8 mov %rbx,%rax 10: 83 e0 07 and $0x7,%eax 13: 83 c0 03 add $0x3,%eax 16: 38 d0 cmp %dl,%al 18: 7c 08 jl 0x22 1a: 84 d2 test %dl,%dl 1c: 0f 85 2a 01 00 00 jne 0x14c 22: 8b 0d 05 c9 e2 0b mov 0xbe2c905(%rip),%ecx # 0xbe2c92d * 28: 85 c9 test %ecx,%ecx <-- trapping instruction 2a: 75 07 jne 0x33 2c: 65 8b 05 ea 70 c0 7e mov %gs:0x7ec070ea(%rip),%eax # 0x7ec0711d 33: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 3a: fc ff df 3d: 48 rex.W