audit: type=1804 audit(1639144891.623:229): pid=28124 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir118674077/syzkaller.9IHiDX/40/bus" dev="sda1" ino=14603 res=1 watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.5:28125] Modules linked in: irq event stamp: 2803301 hardirqs last enabled at (2803300): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (2803301): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (2762834): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (2762837): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (2762837): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 28125 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:on_stack arch/x86/include/asm/stacktrace.h:42 [inline] RIP: 0010:stack_access_ok arch/x86/kernel/unwind_orc.c:321 [inline] RIP: 0010:deref_stack_reg+0xba/0x1d0 arch/x86/kernel/unwind_orc.c:331 Code: ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 00 01 00 00 49 8d 7c 24 10 4d 8b 74 24 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa <48> c1 ea 03 80 3c 02 00 0f 85 c7 00 00 00 49 39 ee 49 8b 44 24 10 RSP: 0018:ffff8880ba006da0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff11017400db5 RCX: 0000000000000000 RDX: ffff8880ba006f78 RSI: ffff8880962efc88 RDI: ffff8880ba006f78 RBP: ffff8880962efc88 R08: ffffffff8c06534a R09: ffffffff8c065346 R10: ffff8880ba006fc7 R11: 0000000000074071 R12: ffff8880ba006f68 R13: ffff8880ba006fb0 R14: ffff8880962e8000 R15: ffffffff8c065346 FS: 00007f0784de2700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2f44a000 CR3: 0000000092a11000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unwind_next_frame+0x9fc/0x1400 arch/x86/kernel/unwind_orc.c:502 __save_stack_trace+0x9f/0x190 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553 kmem_cache_alloc_node+0x146/0x3b0 mm/slab.c:3649 __alloc_skb+0x71/0x560 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:995 [inline] sctp_ulpevent_new.constprop.0+0x1f/0x170 net/sctp/ulpevent.c:69 sctp_ulpevent_make_peer_addr_change+0x31/0x7f0 net/sctp/ulpevent.c:265 sctp_assoc_control_transport+0x20e/0xb70 net/sctp/associola.c:869 sctp_cmd_transport_on net/sctp/sm_sideeffect.c:768 [inline] sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1668 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1199 [inline] sctp_do_sm+0x3c5c/0x5110 net/sctp/sm_sideeffect.c:1170 sctp_assoc_bh_rcv+0x345/0x650 net/sctp/associola.c:1073 sctp_inq_push+0x1da/0x270 net/sctp/inqueue.c:95 sctp_rcv+0x1642/0x3300 net/sctp/input.c:268 sctp6_rcv+0x12/0x30 net/sctp/ipv6.c:1072 ip6_input_finish+0x46a/0x17a0 net/ipv6/ip6_input.c:385 NF_HOOK include/linux/netfilter.h:289 [inline] ip6_input+0xcf/0x3c0 net/ipv6/ip6_input.c:428 dst_input include/net/dst.h:461 [inline] ip6_rcv_finish+0x1d9/0x2f0 net/ipv6/ip6_input.c:76 NF_HOOK include/linux/netfilter.h:289 [inline] ipv6_rcv+0xf2/0x3f0 net/ipv6/ip6_input.c:273 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:4954 __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5066 process_backlog+0x241/0x700 net/core/dev.c:5849 napi_poll net/core/dev.c:6280 [inline] net_rx_action+0x4ac/0xfb0 net/core/dev.c:6346 __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:schedule_debug kernel/sched/core.c:3329 [inline] RIP: 0010:__schedule+0x110/0x2040 kernel/sched/core.c:3439 Code: 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 f2 19 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 74 24 18 4c 89 f2 48 c1 ea 03 80 3c 02 00 <0f> 85 c5 19 00 00 49 81 3e 9d 6e ac 57 0f 85 09 1f 00 00 65 8b 05 RSP: 0018:ffff8880962ee7c8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc900076b1000 RDX: 1ffff11012c5d000 RSI: ffffffff83771e31 RDI: ffff8880406002d8 RBP: ffff8880962ee890 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880406002c0 R13: 000000000002b0c0 R14: ffff8880962e8000 R15: ffff8880ba02b0c0 preempt_schedule_irq+0xb0/0x140 kernel/sched/core.c:3744 retint_kernel+0x1b/0x2d RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:23 [inline] RIP: 0010:preempt_schedule_notrace+0x0/0x110 kernel/sched/core.c:3690 Code: 0f 1f 44 00 00 f6 c4 02 74 ce e9 fb fe ff ff 0f 0b 48 c7 c7 80 82 f1 89 e8 bd fa 7f f9 eb d5 66 66 2e 0f 1f 84 00 00 00 00 00 <65> 8b 05 99 77 e9 77 a9 ff ff ff 7f 74 01 c3 48 c7 c0 80 82 f1 89 RSP: 0018:ffff8880962ee970 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000001 RBX: ffff8880ba022ac0 RCX: ffffffff81518c83 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880ba022ad0 RBP: ffff8880962ee9c0 R08: 0000000000000000 R09: ffffed101740455a R10: ffff8880ba022ad3 R11: 0000000000000000 R12: ffff8880a8f93d00 R13: ffffed1012c5dd54 R14: ffff8880962eea98 R15: 0000000000000001 ___preempt_schedule_notrace+0x16/0x2e rcu_is_watching+0x96/0xc0 kernel/rcu/tree.c:1026 rcu_read_lock_held+0xba/0x110 kernel/rcu/update.c:283 fib6_node_lookup_1+0x1a0/0x910 net/ipv6/ip6_fib.c:1416 fib6_node_lookup+0xbe/0x170 net/ipv6/ip6_fib.c:1485 fib6_table_lookup+0xb3/0xf40 net/ipv6/route.c:1869 ip6_pol_route+0x180/0x1270 net/ipv6/route.c:1909 fib6_rule_lookup+0x10b/0x4e0 net/ipv6/fib6_rules.c:118 ip6_route_output_flags+0x2b0/0x350 net/ipv6/route.c:2163 ip6_dst_lookup_tail+0x566/0x19b0 net/ipv6/ip6_output.c:1019 ip6_dst_lookup_flow+0x8c/0x1d0 net/ipv6/ip6_output.c:1120 sctp_v6_get_dst+0x120e/0x1c90 net/sctp/ipv6.c:349 sctp_transport_route+0x125/0x350 net/sctp/transport.c:312 sctp_assoc_add_peer+0x5bf/0x1050 net/sctp/associola.c:677 sctp_process_param net/sctp/sm_make_chunk.c:2553 [inline] sctp_process_init+0x250a/0x2b60 net/sctp/sm_make_chunk.c:2373 sctp_cmd_process_init net/sctp/sm_sideeffect.c:682 [inline] sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1391 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1199 [inline] sctp_do_sm+0x173e/0x5110 net/sctp/sm_sideeffect.c:1170 sctp_assoc_bh_rcv+0x345/0x650 net/sctp/associola.c:1073 sctp_inq_push+0x1da/0x270 net/sctp/inqueue.c:95 sctp_backlog_rcv+0x1e9/0x11e0 net/sctp/input.c:356 sk_backlog_rcv include/net/sock.h:952 [inline] __release_sock+0x134/0x3a0 net/core/sock.c:2362 release_sock+0x54/0x1b0 net/core/sock.c:2901 sctp_wait_for_connect+0x301/0x530 net/sctp/socket.c:8635 __sctp_connect+0xb6e/0xd00 net/sctp/socket.c:1273 __sctp_setsockopt_connectx+0x132/0x1c0 net/sctp/socket.c:1381 sctp_setsockopt_connectx_old net/sctp/socket.c:1397 [inline] sctp_setsockopt+0x29d9/0x4b40 net/sctp/socket.c:4354 __sys_setsockopt+0x14d/0x240 net/socket.c:2013 __do_sys_setsockopt net/socket.c:2024 [inline] __se_sys_setsockopt net/socket.c:2021 [inline] __x64_sys_setsockopt+0xba/0x150 net/socket.c:2021 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f078626ce99 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:00007f0784de2168 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f078637ff60 RCX: 00007f078626ce99 RDX: 000000000000006b RSI: 0000000000000084 RDI: 0000000000000006 RBP: 00007f07862c7031 R08: 000000000000001c R09: 0000000000000000 R10: 000000002055bfe4 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe690d413f R14: 00007f0784de2300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: df 48 89 fisttps -0x77(%rax) 3: fa cli 4: 48 c1 ea 03 shr $0x3,%rdx 8: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) c: 0f 85 00 01 00 00 jne 0x112 12: 49 8d 7c 24 10 lea 0x10(%r12),%rdi 17: 4d 8b 74 24 08 mov 0x8(%r12),%r14 1c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 23: fc ff df 26: 48 89 fa mov %rdi,%rdx * 29: 48 c1 ea 03 shr $0x3,%rdx <-- trapping instruction 2d: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 31: 0f 85 c7 00 00 00 jne 0xfe 37: 49 39 ee cmp %rbp,%r14 3a: 49 8b 44 24 10 mov 0x10(%r12),%rax