watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.1:18297] Modules linked in: irq event stamp: 3646923 hardirqs last enabled at (3646922): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (3646923): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (3629860): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (3629863): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (3629863): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 18297 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x50 kernel/kcov.c:97 Code: ff 48 89 df e8 11 dd 35 00 e9 ab fe ff ff 4c 89 ef e8 04 dd 35 00 e9 23 fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <48> 8b 34 24 65 48 8b 04 25 c0 df 01 00 65 8b 15 cc 59 9f 7e 81 e2 RSP: 0018:ffff8880ba007cb0 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 RAX: ffff8880184b2280 RBX: 0000000000000103 RCX: ffffffff83771e23 RDX: 0000000000000100 RSI: ffffffff83771e2c RDI: 0000000000000005 RBP: ffffffff88b3e120 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff88b3e0e0 R14: 0000000000000000 R15: 0000000000000000 ieee802154 phy0 wpan0: encryption failed: -22 FS: 00007f93a3d74700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 ieee802154 phy1 wpan1: encryption failed: -22 CR2: 00007f7f63045000 CR3: 0000000096b44000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: check_preemption_disabled+0x41/0x280 lib/smp_processor_id.c:51 rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:348 [inline] rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:1025 rcu_read_lock_sched_held+0xc6/0x1d0 kernel/rcu/update.c:113 trace_timer_expire_exit include/trace/events/timer.h:121 [inline] call_timer_fn+0x617/0x700 kernel/time/timer.c:1339 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __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:__list_del include/linux/list.h:105 [inline] RIP: 0010:__list_del_entry include/linux/list.h:120 [inline] RIP: 0010:list_del_init include/linux/list.h:159 [inline] RIP: 0010:unhash_mnt+0xe9/0x470 fs/namespace.c:802 Code: 8d 6b 68 4c 8b 73 60 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02 00 0f 85 32 03 00 00 49 8d 7e 08 4c 8b 63 68 <48> b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f RSP: 0018:ffff888094e57918 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff8880aa3cf200 RCX: ffffffff81aa7345 RDX: 1ffff11015479e4d RSI: ffffffff81aa7353 RDI: ffff8880aa3cf268 RBP: ffff8880aa3cf260 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880aa3cf260 R13: ffff8880aa3cf268 R14: ffff8880aa3cf260 R15: ffff8880aa3cf210 umount_mnt fs/namespace.c:826 [inline] umount_tree+0x928/0xc80 fs/namespace.c:1460 drop_collected_mounts+0xa6/0x1a0 fs/namespace.c:1806 put_mnt_ns fs/namespace.c:3271 [inline] put_mnt_ns+0x5f/0x80 fs/namespace.c:3267 free_nsproxy+0x41/0x220 kernel/nsproxy.c:176 switch_task_namespaces+0xaa/0xc0 kernel/nsproxy.c:229 do_exit+0xbee/0x2be0 kernel/exit.c:869 do_group_exit+0x125/0x310 kernel/exit.c:967 get_signal+0x3f2/0x1f70 kernel/signal.c:2589 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f93a54005a9 Code: Bad RIP value. RSP: 002b:00007f93a3d74168 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: 0000000000000000 RBX: 00007f93a5521f80 RCX: 00007f93a54005a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000020000 RBP: 00007f93a545b580 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff2d7280af R14: 00007f93a3d74300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 8173 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 RIP: 0010:write_comp_data+0x23/0x70 kernel/kcov.c:122 Code: 1f 84 00 00 00 00 00 49 89 f1 49 89 fa 65 48 8b 34 25 c0 df 01 00 65 8b 05 7a 59 9f 7e a9 00 01 1f 00 75 4f 8b 86 60 13 00 00 <83> f8 03 75 44 48 8b 86 68 13 00 00 8b b6 64 13 00 00 48 8b 38 48 RSP: 0018:ffff888093197ae0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000040 RCX: ffffffff81a604bc RDX: 0000000000000001 RSI: ffff888091802480 RDI: 0000000000000001 RBP: ffff888093197b70 R08: ffffffff8cd41398 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff888093197c78 R13: ffffffff89f18280 R14: 0000000000000001 R15: 000000000000d1ed FS: 00005555565d6400(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000083ed28 CR3: 000000009fa6b000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __read_seqcount_begin include/linux/seqlock.h:114 [inline] raw_read_seqcount_begin include/linux/seqlock.h:148 [inline] read_seqcount_begin include/linux/seqlock.h:165 [inline] read_seqbegin include/linux/seqlock.h:440 [inline] path_init+0x129c/0x19d0 fs/namei.c:2206 path_mountpoint+0x84/0xac0 fs/namei.c:2692 filename_mountpoint+0x184/0x4f0 fs/namei.c:2718 ksys_umount+0x156/0x1070 fs/namespace.c:1654 __do_sys_umount fs/namespace.c:1680 [inline] __se_sys_umount fs/namespace.c:1678 [inline] __x64_sys_umount+0x50/0x70 fs/namespace.c:1678 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7ff2d3301a17 Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff8c7fcde8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: ffffffffffffffda RBX: 0000000000001bd4 RCX: 00007ff2d3301a17 RDX: 000000000000000c RSI: 000000000000000a RDI: 00007fff8c7fdf70 RBP: 00007fff8c7fdf4c R08: 0000000000000000 R09: 0000012eefb00a58 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff2d335a5f6 R13: 00007fff8c7fdf70 R14: 0000000000000000 R15: 00007fff8c7fdfb0