watchdog: BUG: soft lockup - CPU#0 stuck for 24s! [syz-executor.3:6311] Modules linked in: irq event stamp: 9659641 hardirqs last enabled at (9659640): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (9659641): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (9648056): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (9648059): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 6311 Comm: syz-executor.3 Not tainted 5.10.229 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:30 [inline] RIP: 0010:__orc_find+0x6f/0xf0 arch/x86/kernel/unwind_orc.c:52 Code: 72 4d 4c 89 e0 48 29 e8 48 89 c2 48 c1 e8 3f 48 c1 fa 02 48 01 d0 48 d1 f8 48 8d 5c 85 00 48 89 d8 48 c1 e8 03 42 0f b6 14 38 <48> 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 50 48 63 03 48 01 RSP: 0018:ffff88806ce09620 EFLAGS: 00000217 RAX: 1ffffffff0ad8f05 RBX: ffffffff856c782c RCX: ffffffff81158763 RDX: 0000000000000000 RSI: ffffffff8598944c RDI: ffffffff856c7828 RBP: ffffffff856c7828 R08: ffffffff8598944c R09: ffffffff8598945e R10: 0000000000032042 R11: 1ffff1100d9c12d5 R12: ffffffff856c7830 R13: ffffffff856c7828 R14: ffffffff856c7828 R15: dffffc0000000000 FS: 00007fbad9042700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555568139c58 CR3: 0000000047efe000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000dd060a Call Trace: orc_find arch/x86/kernel/unwind_orc.c:178 [inline] unwind_next_frame+0x2b3/0x1a90 arch/x86/kernel/unwind_orc.c:448 arch_stack_walk+0x83/0xf0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc.constprop.0+0xc9/0xd0 mm/kasan/common.c:461 slab_post_alloc_hook mm/slab.h:532 [inline] slab_alloc_node mm/slub.c:2896 [inline] kmem_cache_alloc_node+0x14b/0x330 mm/slub.c:2932 __alloc_skb+0x6d/0x5b0 net/core/skbuff.c:199 __netdev_alloc_skb+0x6e/0x360 net/core/skbuff.c:447 netdev_alloc_skb include/linux/skbuff.h:2854 [inline] dev_alloc_skb include/linux/skbuff.h:2867 [inline] __ieee80211_beacon_get+0x3af/0x1440 net/mac80211/tx.c:4876 ieee80211_beacon_get_tim+0x88/0x9f0 net/mac80211/tx.c:4990 ieee80211_beacon_get include/net/mac80211.h:4912 [inline] mac80211_hwsim_beacon_tx+0x111/0x940 drivers/net/wireless/mac80211_hwsim.c:1740 __iterate_interfaces+0x1f0/0x550 net/mac80211/util.c:792 ieee80211_iterate_active_interfaces_atomic+0x71/0x1c0 net/mac80211/util.c:828 mac80211_hwsim_beacon+0xd1/0x1d0 drivers/net/wireless/mac80211_hwsim.c:1793 __run_hrtimer kernel/time/hrtimer.c:1586 [inline] __hrtimer_run_queues+0x632/0xb40 kernel/time/hrtimer.c:1650 hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1667 __do_softirq+0x1b8/0x7c9 kernel/softirq.c:298 asm_call_irq_on_stack+0x12/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x80/0xa0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x114/0x1b0 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x43/0xa0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:qlink_free mm/kasan/quarantine.c:151 [inline] RIP: 0010:qlist_free_all+0x54/0xe0 mm/kasan/quarantine.c:170 Code: bd 00 00 00 00 00 fc ff df eb 2c 48 63 87 c0 00 00 00 4c 8b 3e 48 c7 c2 a5 b7 6c 81 48 29 c6 48 89 f0 48 c1 e8 03 c6 04 28 fb 27 c6 ff ff 4d 85 ff 74 44 4c 89 fe 48 89 df 48 85 db 75 cc 48 RSP: 0018:ffff8880363e71f8 EFLAGS: 00000216 RAX: 1ffff110019fab96 RBX: 0000000000000000 RCX: ffffea000033f500 RDX: ffffffff816cb7a5 RSI: ffff88800cfd5cb0 RDI: ffff88800804d640 RBP: dffffc0000000000 R08: 0000000000000011 R09: ffffffff816cb701 R10: ffff88800d2f1440 R11: 0000000000000001 R12: ffff8880363e7230 R13: 0000000080000000 R14: ffffffff80000000 R15: ffff8880092f9cb0 quarantine_reduce+0x184/0x210 mm/kasan/quarantine.c:267 __kasan_kmalloc.constprop.0+0xa2/0xd0 mm/kasan/common.c:442 slab_post_alloc_hook mm/slab.h:532 [inline] slab_alloc_node mm/slub.c:2896 [inline] slab_alloc mm/slub.c:2904 [inline] kmem_cache_alloc+0x13b/0x310 mm/slub.c:2909 mem_pool_alloc mm/kmemleak.c:423 [inline] create_object.isra.0+0x3a/0xa20 mm/kmemleak.c:578 kmemleak_alloc_percpu+0xa0/0x100 mm/kmemleak.c:924 pcpu_alloc+0x4e2/0x1240 mm/percpu.c:1842 fib6_nh_init+0x855/0x1a00 net/ipv6/route.c:3503 ip6_route_info_create+0x1185/0x1a00 net/ipv6/route.c:3703 addrconf_f6i_alloc+0x28f/0x430 net/ipv6/route.c:4473 ipv6_add_addr+0x36c/0x1cf0 net/ipv6/addrconf.c:1114 add_addr+0xcf/0x2c0 net/ipv6/addrconf.c:3121 init_loopback net/ipv6/addrconf.c:3206 [inline] addrconf_notify+0xf71/0x2410 net/ipv6/addrconf.c:3636 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0xb3/0x110 kernel/notifier.c:410 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2047 call_netdevice_notifiers_extack net/core/dev.c:2059 [inline] call_netdevice_notifiers net/core/dev.c:2073 [inline] __dev_notify_flags+0x110/0x2c0 net/core/dev.c:8564 dev_change_flags+0x100/0x160 net/core/dev.c:8602 dev_ifsioc+0x5b9/0xa00 net/core/dev_ioctl.c:230 dev_ioctl+0x23c/0xd30 net/core/dev_ioctl.c:481 sock_do_ioctl+0x17d/0x300 net/socket.c:1089 sock_ioctl+0x3ea/0x700 net/socket.c:1206 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __x64_sys_ioctl+0x19a/0x210 fs/ioctl.c:739 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7fbadbaccb19 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:00007fbad9042188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fbadbbdff60 RCX: 00007fbadbaccb19 RDX: 0000000020000140 RSI: 0000000000008914 RDI: 0000000000000006 RBP: 00007fbadbb26f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc2fab2d7f R14: 00007fbad9042300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline] NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline] NMI backtrace for cpu 1 skipped: idling at default_idle+0xe/0x20 arch/x86/kernel/process.c:706 ---------------- Code disassembly (best guess): 0: 72 4d jb 0x4f 2: 4c 89 e0 mov %r12,%rax 5: 48 29 e8 sub %rbp,%rax 8: 48 89 c2 mov %rax,%rdx b: 48 c1 e8 3f shr $0x3f,%rax f: 48 c1 fa 02 sar $0x2,%rdx 13: 48 01 d0 add %rdx,%rax 16: 48 d1 f8 sar %rax 19: 48 8d 5c 85 00 lea 0x0(%rbp,%rax,4),%rbx 1e: 48 89 d8 mov %rbx,%rax 21: 48 c1 e8 03 shr $0x3,%rax 25: 42 0f b6 14 38 movzbl (%rax,%r15,1),%edx * 2a: 48 89 d8 mov %rbx,%rax <-- trapping instruction 2d: 83 e0 07 and $0x7,%eax 30: 83 c0 03 add $0x3,%eax 33: 38 d0 cmp %dl,%al 35: 7c 04 jl 0x3b 37: 84 d2 test %dl,%dl 39: 75 50 jne 0x8b 3b: 48 63 03 movslq (%rbx),%rax 3e: 48 rex.W 3f: 01 .byte 0x1