watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [syz-executor.0:15623] Modules linked in: irq event stamp: 2696353 hardirqs last enabled at (2696352): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (2696353): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (2694266): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (2694269): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (2694269): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 1 PID: 15623 Comm: syz-executor.0 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:unwind_next_frame+0x425/0x1400 arch/x86/kernel/unwind_orc.c:427 Code: f9 4c 89 c7 e8 3c f2 ff ff 48 85 c0 49 89 c7 74 6a 4d 8d 47 04 48 b8 00 00 00 00 00 fc ff df 4c 89 c2 48 c1 ea 03 0f b6 04 02 <4c> 89 c2 83 e2 07 38 d0 7f 08 84 c0 0f 85 23 0c 00 00 41 0f b6 47 RSP: 0018:ffff8880ba106a98 EFLAGS: 00000a02 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 1ffff11017420d5c RCX: ffffffff87786336 RDX: 1ffffffff180d38a RSI: ffffffff8c069c4e RDI: ffffffff8b817fe8 RBP: 0000000000000002 R08: ffffffff8c069c52 R09: ffffffff8c069c4e R10: ffff8880ba106c27 R11: 0000000000074071 R12: ffff8880ba106c10 R13: ffff8880ba106bfd R14: ffff8880ba106bc8 R15: ffffffff8c069c4e FS: 00007fb462f7d700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c00b399000 CR3: 0000000009e6d000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __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 slab_post_alloc_hook mm/slab.h:445 [inline] slab_alloc_node mm/slab.c:3340 [inline] kmem_cache_alloc_node_trace+0x13c/0x3b0 mm/slab.c:3666 __do_kmalloc_node mm/slab.c:3688 [inline] __kmalloc_node_track_caller+0x38/0x70 mm/slab.c:3703 __kmalloc_reserve net/core/skbuff.c:137 [inline] __alloc_skb+0xae/0x560 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:995 [inline] ndisc_alloc_skb+0x134/0x320 net/ipv6/ndisc.c:403 ndisc_send_ns+0x162/0x840 net/ipv6/ndisc.c:609 ndisc_solicit+0x2cd/0x500 net/ipv6/ndisc.c:725 neigh_probe+0xcc/0x110 net/core/neighbour.c:916 __neigh_event_send+0x387/0xf70 net/core/neighbour.c:1074 neigh_event_send include/net/neighbour.h:436 [inline] neigh_resolve_output+0x6d8/0x910 net/core/neighbour.c:1358 neigh_output include/net/neighbour.h:501 [inline] ip6_finish_output2+0x113d/0x2290 net/ipv6/ip6_output.c:120 ip6_finish_output+0x89b/0x10f0 net/ipv6/ip6_output.c:192 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip6_output+0x205/0x770 net/ipv6/ip6_output.c:209 dst_output include/net/dst.h:455 [inline] NF_HOOK include/linux/netfilter.h:289 [inline] ip6_xmit+0xdbf/0x20a0 net/ipv6/ip6_output.c:313 sctp_v6_xmit+0x377/0x710 net/sctp/ipv6.c:229 sctp_packet_transmit+0x1e21/0x3660 net/sctp/output.c:641 sctp_outq_flush_transports+0x19d/0x340 net/sctp/outqueue.c:1166 sctp_outq_flush net/sctp/outqueue.c:1214 [inline] sctp_outq_uncork+0x185/0x200 net/sctp/outqueue.c:777 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1815 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1199 [inline] sctp_do_sm+0x72a/0x5110 net/sctp/sm_sideeffect.c:1170 sctp_generate_heartbeat_event+0x2af/0x490 net/sctp/sm_sideeffect.c:406 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 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:lock_page_memcg+0x6b/0x220 mm/memcontrol.c:1913 Code: 3d 1d 33 71 09 00 0f 84 e0 00 00 00 0f 1f 44 00 00 4c 8d 7b 38 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 78 01 00 00 4c 8b 63 38 4d 89 fd 49 be 00 00 00 00 00 fc ff RSP: 0018:ffff88806946f6c0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffffea0001bd1080 RCX: ffffffff81518c83 RDX: 1ffffd400037a217 RSI: 0000000000000004 RDI: ffff8880ba122ad0 RBP: ffffea0001bd1080 R08: 0000000000000000 R09: ffffed101742455a R10: ffff8880ba122ad3 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffffea0001bd1080 R15: ffffea0001bd10b8 page_remove_file_rmap+0x36/0xa30 mm/rmap.c:1212 page_remove_rmap+0xe5/0x120 mm/rmap.c:1297 zap_pte_range mm/memory.c:1350 [inline] zap_pmd_range mm/memory.c:1463 [inline] zap_pud_range mm/memory.c:1492 [inline] zap_p4d_range mm/memory.c:1513 [inline] unmap_page_range+0x147d/0x2c50 mm/memory.c:1534 unmap_single_vma+0x198/0x300 mm/memory.c:1579 unmap_vmas+0xa9/0x180 mm/memory.c:1609 exit_mmap+0x2b9/0x530 mm/mmap.c:3093 __mmput kernel/fork.c:1016 [inline] mmput+0x14e/0x4a0 kernel/fork.c:1037 exit_mm kernel/exit.c:549 [inline] do_exit+0xaec/0x2be0 kernel/exit.c:857 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: 0033:0x7fb4646080e9 Code: Bad RIP value. RSP: 002b:00007fb462f7d168 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: fffffffffffffe00 RBX: 00007fb46471af60 RCX: 00007fb4646080e9 RDX: 000000000000006b RSI: 0000000000000084 RDI: 0000000000000006 RBP: 00007fb46466208d R08: 000000000000001c R09: 0000000000000000 R10: 000000002055bfe4 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd8251df5f R14: 00007fb462f7d300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 15614 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:lock_acquire+0x1f6/0x3c0 kernel/locking/lockdep.c:3912 Code: 03 80 3c 10 00 0f 85 b7 01 00 00 48 83 3d 09 2e a6 08 00 0f 84 2a 01 00 00 48 8b 7c 24 08 57 9d 0f 1f 44 00 00 48 83 c4 18 5b <5d> 41 5c 41 5d 41 5e 41 5f c3 65 8b 05 89 2c b6 7e 83 f8 07 0f 87 RSP: 0018:ffff8880ba006fe8 EFLAGS: 00000092 RAX: 1ffffffff13e3051 RBX: 000000000001cbc0 RCX: 0000000000004124 RDX: dffffc0000000000 RSI: 00000000489d47ff RDI: 0000000000000086 RBP: ffffffff8d38c7a0 R08: ffffffff8cd37e60 R09: 0000000000000004 R10: ffff888096664e68 R11: ffffffff8c66501b R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 FS: 00007f1e2e03d700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c0037c7000 CR3: 00000000b522a000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:152 debug_object_deactivate lib/debugobjects.c:540 [inline] debug_object_deactivate+0xfc/0x2e0 lib/debugobjects.c:529 debug_hrtimer_deactivate kernel/time/hrtimer.c:421 [inline] debug_deactivate kernel/time/hrtimer.c:471 [inline] __run_hrtimer kernel/time/hrtimer.c:1435 [inline] __hrtimer_run_queues+0x1bc/0xe60 kernel/time/hrtimer.c:1527 hrtimer_interrupt+0x326/0x9e0 kernel/time/hrtimer.c:1585 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1071 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1096 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:check_memory_region_inline mm/kasan/kasan.c:251 [inline] RIP: 0010:check_memory_region+0x9/0x170 mm/kasan/kasan.c:267 Code: 48 c1 ee 03 0f b6 04 06 84 c0 74 d8 83 e2 07 38 d0 7e d7 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 85 f6 0f 84 3f 01 00 00 <48> b8 ff ff ff ff ff 7f ff ff 44 0f b6 c2 48 39 c7 0f 86 20 01 00 RSP: 0018:ffff8880ba0073d8 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffff8880ba007548 RCX: ffffffff81299566 RDX: 0000000000000001 RSI: 0000000000000060 RDI: ffff8880ba0074c8 RBP: ffff8880ba0074c8 R08: ffffed1011715140 R09: ffffed1011715170 R10: 00000000d5176a21 R11: 00000000576cad76 R12: 0000000000000060 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8880ba0074c8 memset+0x20/0x40 mm/kasan/kasan.c:285 memset include/linux/string.h:362 [inline] __unwind_start+0x76/0x960 arch/x86/kernel/unwind_orc.c:595 unwind_start arch/x86/include/asm/unwind.h:60 [inline] __save_stack_trace+0x72/0x190 arch/x86/kernel/stacktrace.c:43 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_trace+0x151/0x3b0 mm/slab.c:3668 __do_kmalloc_node mm/slab.c:3688 [inline] __kmalloc_node_track_caller+0x38/0x70 mm/slab.c:3703 __kmalloc_reserve net/core/skbuff.c:137 [inline] __alloc_skb+0xae/0x560 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:995 [inline] _sctp_make_chunk+0x50/0x260 net/sctp/sm_make_chunk.c:1411 sctp_make_control+0x30/0x2d0 net/sctp/sm_make_chunk.c:1458 sctp_make_heartbeat+0x8c/0x270 net/sctp/sm_make_chunk.c:1165 sctp_sf_heartbeat.constprop.0+0x21/0x170 net/sctp/sm_statefuns.c:1015 sctp_sf_sendbeat_8_3+0x36c/0x510 net/sctp/sm_statefuns.c:1059 sctp_do_sm+0x162/0x5110 net/sctp/sm_sideeffect.c:1167 sctp_generate_heartbeat_event+0x2af/0x490 net/sctp/sm_sideeffect.c:406 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 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:PageAnon include/linux/page-flags.h:419 [inline] RIP: 0010:zap_pte_range mm/memory.c:1340 [inline] RIP: 0010:zap_pmd_range mm/memory.c:1463 [inline] RIP: 0010:zap_pud_range mm/memory.c:1492 [inline] RIP: 0010:zap_p4d_range mm/memory.c:1513 [inline] RIP: 0010:unmap_page_range+0x1278/0x2c50 mm/memory.c:1534 Code: 00 00 49 8b 45 08 31 ff 4d 89 ec 48 89 c3 48 89 84 24 c0 00 00 00 83 e3 01 48 89 de e8 91 e8 d6 ff 48 85 db 0f 85 90 0d 00 00 f3 e6 d6 ff 49 8d 7c 24 18 48 89 fa 48 c1 ea 03 42 80 3c 32 00 RSP: 0018:ffff88806c337770 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff818b9e6f RDX: 0000000000000000 RSI: ffff888096664540 RDI: 0000000000000007 RBP: ffffea0001b05f88 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000007 R11: 0000000000000000 R12: ffffea0001b05f80 R13: ffffea0001b05f80 R14: dffffc0000000000 R15: 00007f1e2ed70000 unmap_single_vma+0x198/0x300 mm/memory.c:1579 unmap_vmas+0xa9/0x180 mm/memory.c:1609 exit_mmap+0x2b9/0x530 mm/mmap.c:3093 __mmput kernel/fork.c:1016 [inline] mmput+0x14e/0x4a0 kernel/fork.c:1037 exit_mm kernel/exit.c:549 [inline] do_exit+0xaec/0x2be0 kernel/exit.c:857 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: 0033:0x7f1e2f6c80e9 Code: Bad RIP value. RSP: 002b:00007f1e2e03d168 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: fffffffffffffe00 RBX: 00007f1e2f7daf60 RCX: 00007f1e2f6c80e9 RDX: 000000000000006b RSI: 0000000000000084 RDI: 0000000000000011 RBP: 00007f1e2f72208d R08: 000000000000001c R09: 0000000000000000 R10: 000000002055bfe4 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffefbe6d1ef R14: 00007f1e2e03d300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: f9 stc 1: 4c 89 c7 mov %r8,%rdi 4: e8 3c f2 ff ff callq 0xfffff245 9: 48 85 c0 test %rax,%rax c: 49 89 c7 mov %rax,%r15 f: 74 6a je 0x7b 11: 4d 8d 47 04 lea 0x4(%r15),%r8 15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1c: fc ff df 1f: 4c 89 c2 mov %r8,%rdx 22: 48 c1 ea 03 shr $0x3,%rdx 26: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax * 2a: 4c 89 c2 mov %r8,%rdx <-- trapping instruction 2d: 83 e2 07 and $0x7,%edx 30: 38 d0 cmp %dl,%al 32: 7f 08 jg 0x3c 34: 84 c0 test %al,%al 36: 0f 85 23 0c 00 00 jne 0xc5f 3c: 41 rex.B 3d: 0f .byte 0xf 3e: b6 47 mov $0x47,%dh