watchdog: BUG: soft lockup - CPU#1 stuck for 26s! [syz-executor.5:3971] Modules linked in: irq event stamp: 227884 hardirqs last enabled at (227883): [<ffffffff8460144a>] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (227884): [<ffffffff84504fff>] sysvec_apic_timer_interrupt+0xf/0x90 softirqs last enabled at (227842): [<ffffffff8118dda3>] irq_exit_rcu+0x93/0xc0 softirqs last disabled at (227829): [<ffffffff8118dda3>] irq_exit_rcu+0x93/0xc0 CPU: 1 PID: 3971 Comm: syz-executor.5 Not tainted 6.4.0-rc6-next-20230613 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 Code: be b0 01 00 00 e8 a0 ff ff ff 31 c0 e9 f9 c0 06 03 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 65 8b 05 9d 81 b7 7e 89 c1 48 8b 34 24 81 e1 00 01 00 RSP: 0018:ffff8880158b7320 EFLAGS: 00000246 RAX: 0000000000000002 RBX: 0000000000010000 RCX: ffffffff83c33b4c RDX: ffff88800fef8000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: ffff88801bbfb7f0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001 R13: dffffc0000000000 R14: ffff888042af6000 R15: 0000000000000001 FS: 00007f9e67856700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2bd2d000 CR3: 000000001f510000 CR4: 0000000000350ee0 Call Trace: <IRQ> </IRQ> <TASK> __ip6_append_data.isra.0+0xbac/0x4560 ip6_append_data+0x1d4/0x530 rawv6_sendmsg+0x156e/0x3dc0 inet_sendmsg+0x121/0x150 sock_sendmsg+0x19b/0x200 splice_to_socket+0x949/0xe10 direct_splice_actor+0x119/0x180 splice_direct_to_actor+0x349/0x9d0 do_splice_direct+0x1bb/0x290 do_sendfile+0xb4b/0x12f0 __x64_sys_sendfile64+0x1d5/0x210 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 RIP: 0033:0x7f9e6a301b19 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:00007f9e67856188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f9e6a415020 RCX: 00007f9e6a301b19 RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000008 RBP: 00007f9e6a35bf6d R08: 0000000000000000 R09: 0000000000000000 R10: 000000000001a000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc2f8a7faf R14: 00007f9e67856300 R15: 0000000000022000 </TASK> Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.4.0-rc6-next-20230613 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:rcu_sched_clock_irq+0xffc/0x2f40 Code: 88 84 e8 17 0a f8 ff 58 e9 d1 fe ff ff 65 8b 05 b6 ad ca 7e 85 c0 0f 84 db f1 ff ff 0f 0b e9 d4 f1 ff ff 65 8b 05 a0 ad ca 7e <85> c0 0f 84 2d f1 ff ff 0f 0b e9 26 f1 ff ff 65 8b 05 8a ad ca 7e RSP: 0018:ffff88806ce09c58 EFLAGS: 00000046 RAX: 0000000000000000 RBX: ffffffff85d3b310 RCX: ffffffff8137c8f9 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff0ba743a R10: ffffffff85d3a1d7 R11: 0000000000000001 R12: ffffffffffffffb4 R13: ffff88806ce2c240 R14: 1ffff1100d9c139c R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007efcc83aa318 CR3: 0000000015ad2000 CR4: 0000000000350ef0 Call Trace: <NMI> </NMI> <IRQ> update_process_times+0xea/0x150 tick_sched_handle+0x8e/0x170 tick_sched_timer+0xe6/0x110 __hrtimer_run_queues+0x17f/0xb60 hrtimer_interrupt+0x2ef/0x750 __sysvec_apic_timer_interrupt+0xff/0x380 sysvec_apic_timer_interrupt+0x69/0x90 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:default_idle+0xf/0x20 Code: 4c 01 c7 4c 29 c2 e9 72 ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 07 0f 00 2d 43 09 32 00 fb f4 <fa> e9 9b 55 02 00 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 RSP: 0018:ffffffff85407e10 EFLAGS: 00000206 RAX: 00000000000daebb RBX: 0000000000000000 RCX: ffffffff8450650e RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff81288995 RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffed100d9c6a00 R10: ffff88806ce35003 R11: 0000000000000001 R12: ffffffff85d3a1d0 R13: 1ffffffff0a80fc7 R14: 0000000000000000 R15: 0000000000000000 default_idle_call+0x67/0xa0 do_idle+0x305/0x3c0 cpu_startup_entry+0x18/0x20 rest_init+0x168/0x290 arch_call_rest_init+0x13/0x40 start_kernel+0x3c9/0x4f0 x86_64_start_reservations+0x18/0x30 x86_64_start_kernel+0xcf/0xe0 secondary_startup_64_no_verify+0x179/0x17b </TASK> ---------------- Code disassembly (best guess): 0: be b0 01 00 00 mov $0x1b0,%esi 5: e8 a0 ff ff ff callq 0xffffffaa a: 31 c0 xor %eax,%eax c: e9 f9 c0 06 03 jmpq 0x306c10a 11: 66 0f 1f 84 00 00 00 nopw 0x0(%rax,%rax,1) 18: 00 00 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: 90 nop 21: 90 nop 22: 90 nop 23: 90 nop 24: 90 nop 25: 90 nop 26: 90 nop 27: 90 nop 28: 90 nop 29: 90 nop * 2a: f3 0f 1e fa endbr64 <-- trapping instruction 2e: 65 8b 05 9d 81 b7 7e mov %gs:0x7eb7819d(%rip),%eax # 0x7eb781d2 35: 89 c1 mov %eax,%ecx 37: 48 8b 34 24 mov (%rsp),%rsi 3b: 81 .byte 0x81 3c: e1 00 loope 0x3e 3e: 01 00 add %eax,(%rax)