watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.1:5066] Modules linked in: irq event stamp: 4251759 hardirqs last enabled at (4251758): [<ffffffff84000d02>] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (4251759): [<ffffffff83e6275b>] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (31516): [<ffffffff84001092>] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (31519): [<ffffffff84001092>] asm_call_irq_on_stack+0x12/0x20 CPU: 1 PID: 5066 Comm: syz-executor.1 Not tainted 5.10.228 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:rcu_lockdep_current_cpu_online+0x2e/0x110 kernel/rcu/tree.c:1152 Code: 45 d4 7e 81 e2 00 00 f0 00 b8 01 00 00 00 0f 85 c2 00 00 00 8b 15 1a 4e 39 04 85 d2 0f 84 b4 00 00 00 55 65 ff 05 72 45 d4 7e <53> 48 c7 c3 00 c0 03 00 65 48 03 1d 9a eb d3 7e 48 b8 00 00 00 00 RSP: 0018:ffff88806cf095e8 EFLAGS: 00000206 RAX: 0000000000000001 RBX: ffff88800ffcd200 RCX: ffffffff836f00c9 RDX: 0000000000000001 RSI: ffffffff836f029b RDI: ffff88806cf3c128 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000003 R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000 R13: ffff88801e24d400 R14: ffff88800ffcd222 R15: ffff88806cf09950 FS: 00007fe40d414700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe40fee8e40 CR3: 000000001d0a4000 CR4: 0000000000350ee0 Call Trace: <IRQ> rcu_read_lock_held_common kernel/rcu/update.c:110 [inline] rcu_read_lock_held_common kernel/rcu/update.c:100 [inline] rcu_read_lock_held+0x25/0x50 kernel/rcu/update.c:307 fib6_node_lookup_1 net/ipv6/ip6_fib.c:1583 [inline] fib6_node_lookup+0x550/0x730 net/ipv6/ip6_fib.c:1639 fib6_table_lookup+0xae/0xaf0 net/ipv6/route.c:2180 ip6_pol_route+0x1c5/0x11a0 net/ipv6/route.c:2220 pol_lookup_func include/net/ip6_fib.h:584 [inline] fib6_rule_lookup+0x239/0x340 net/ipv6/ip6_fib.c:317 ip6_route_input_lookup net/ipv6/route.c:2290 [inline] ip6_route_input+0x5e0/0xa60 net/ipv6/route.c:2459 ip6_rcv_finish_core.constprop.0+0x1a4/0x5d0 net/ipv6/ip6_input.c:67 ip6_list_rcv_finish.constprop.0+0x15e/0x900 net/ipv6/ip6_input.c:131 ip6_sublist_rcv net/ipv6/ip6_input.c:311 [inline] ipv6_list_rcv+0x2c4/0x3c0 net/ipv6/ip6_input.c:346 __netif_receive_skb_list_ptype net/core/dev.c:5422 [inline] __netif_receive_skb_list_core+0x4ca/0x8e0 net/core/dev.c:5470 __netif_receive_skb_list net/core/dev.c:5522 [inline] netif_receive_skb_list_internal+0x6ca/0xcd0 net/core/dev.c:5632 netif_receive_skb_list+0x54/0x370 net/core/dev.c:5684 ieee80211_rx_napi+0x35a/0x3c0 net/mac80211/rx.c:4871 ieee80211_rx include/net/mac80211.h:4502 [inline] ieee80211_tasklet_handler+0xd3/0x130 net/mac80211/main.c:235 tasklet_action_common.constprop.0+0x244/0x2f0 kernel/softirq.c:560 __do_softirq+0x1b8/0x7c9 kernel/softirq.c:298 asm_call_irq_on_stack+0x12/0x20 </IRQ> __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:check_kcov_mode kernel/kcov.c:163 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x14/0x60 kernel/kcov.c:197 Code: bd c8 48 63 c9 e9 5e ff ff ff 4c 01 d2 49 89 17 e9 cd fd ff ff 90 48 8b 34 24 65 48 8b 14 25 80 6f 02 00 65 8b 05 ac b0 c1 7e <a9> 00 01 ff 00 74 0f f6 c4 01 74 35 8b 82 fc 13 00 00 85 c0 74 2b RSP: 0018:ffff88804679f9f8 EFLAGS: 00000286 RAX: 0000000080000000 RBX: 0000000000000008 RCX: 0000000000000008 RDX: ffff8880488ecec0 RSI: ffffffff81d7f121 RDI: ffffffff871cacc0 RBP: ffffffff871cacc0 R08: 0000000000000010 R09: ffff888015785098 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000008 R13: ffff88804679fd70 R14: ffffffff871cacc0 R15: dffffc0000000000 memset include/linux/string.h:377 [inline] context_init security/selinux/ss/context.h:147 [inline] security_compute_sid.part.0+0x151/0x16e0 security/selinux/ss/services.c:1752 security_compute_sid security/selinux/ss/services.c:1925 [inline] security_transition_sid+0xc0/0x190 security/selinux/ss/services.c:1925 selinux_determine_inode_label+0x24f/0x340 security/selinux/hooks.c:1771 may_create+0x248/0x370 security/selinux/hooks.c:1806 security_inode_mkdir+0xa9/0x110 security/security.c:1219 vfs_mkdir+0x3d0/0x750 fs/namei.c:3699 do_mkdirat+0x150/0x2b0 fs/namei.c:3728 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7fe40fe9dc27 Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 53 00 00 00 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:00007fe40d413fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe40fe9dc27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000000020000180 RBP: 00007fe40d414040 R08: 0000000000000000 R09: 0000000000100000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000020000180 R14: 00007fe40d414000 R15: 0000000000000000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 5.10.228 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:193 Code: ff ff b9 ff ff ff ff b8 08 00 00 00 4d 8b 17 49 8b 16 48 0f bd c8 48 63 c9 e9 5e ff ff ff 4c 01 d2 49 89 17 e9 cd fd ff ff 90 <48> 8b 34 24 65 48 8b 14 25 80 6f 02 00 65 8b 05 ac b0 c1 7e a9 00 RSP: 0018:ffff88800892fde0 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81472c28 RDX: 0000000000000000 RSI: ffff888008920000 RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000000 R09: ffff888008920007 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000006 R13: 0000000000000040 R14: 0000000000000100 R15: 0000000000000006 FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055ecb4ca4678 CR3: 000000001709e000 CR4: 0000000000350ef0 Call Trace: <NMI> </NMI> trace_hardirqs_on+0x6e/0x180 kernel/trace/trace_preemptirq.c:44 __do_softirq+0x16d/0x7c9 kernel/softirq.c:282 run_ksoftirqd kernel/softirq.c:653 [inline] run_ksoftirqd+0x25/0x50 kernel/softirq.c:645 smpboot_thread_fn+0x3f5/0x860 kernel/smpboot.c:164 kthread+0x38f/0x470 kernel/kthread.c:328 ret_from_fork+0x22/0x30 arch/x86/entry/entry_64.S:298 ---------------- Code disassembly (best guess): 0: 45 d4 rex.RB (bad) 2: 7e 81 jle 0xffffff85 4: e2 00 loop 0x6 6: 00 f0 add %dh,%al 8: 00 b8 01 00 00 00 add %bh,0x1(%rax) e: 0f 85 c2 00 00 00 jne 0xd6 14: 8b 15 1a 4e 39 04 mov 0x4394e1a(%rip),%edx # 0x4394e34 1a: 85 d2 test %edx,%edx 1c: 0f 84 b4 00 00 00 je 0xd6 22: 55 push %rbp 23: 65 ff 05 72 45 d4 7e incl %gs:0x7ed44572(%rip) # 0x7ed4459c * 2a: 53 push %rbx <-- trapping instruction 2b: 48 c7 c3 00 c0 03 00 mov $0x3c000,%rbx 32: 65 48 03 1d 9a eb d3 add %gs:0x7ed3eb9a(%rip),%rbx # 0x7ed3ebd4 39: 7e 3a: 48 rex.W 3b: b8 00 00 00 00 mov $0x0,%eax