watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.5:23479] Modules linked in: irq event stamp: 2520339 hardirqs last enabled at (2520338): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (2520339): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (2476896): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (2476899): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (2476899): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 1 PID: 23479 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:unwind_next_frame+0x755/0x1400 arch/x86/kernel/unwind_orc.c:437 Code: 89 4c 24 28 e8 2c de 6e 00 4c 8b 44 24 30 48 8b 4c 24 28 e9 06 ff ff ff 48 b8 00 00 00 00 00 fc ff df 48 8b 14 24 48 c1 ea 03 <80> 3c 02 00 0f 85 c4 09 00 00 4c 89 f8 49 8b 4e 38 48 ba 00 00 00 RSP: 0018:ffff8880ba106af0 EFLAGS: 00000a06 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff11017420d67 RCX: ffffffff8b8f764b RDX: 1ffff11017420d8b RSI: 0000000000000001 RDI: 0000000000000001 RBP: 0000000000000001 R08: ffffffff8b8f764a R09: ffffffff8b8f761c R10: ffff8880ba106c7f R11: 0000000000074071 R12: ffff8880ba106c68 R13: ffff8880ba106c55 R14: ffff8880ba106c20 R15: ffffffff8b8f7646 FS: 00007fe2b11a7700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2fb25000 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 kmem_cache_alloc+0x122/0x370 mm/slab.c:3559 dst_alloc+0x106/0x1a0 net/core/dst.c:105 rt_dst_alloc+0x7f/0x400 net/ipv4/route.c:1641 __mkroute_output net/ipv4/route.c:2341 [inline] ip_route_output_key_hash_rcu+0xdd2/0x3060 net/ipv4/route.c:2569 ip_route_output_key_hash+0x1c6/0x320 net/ipv4/route.c:2397 __ip_route_output_key include/net/route.h:124 [inline] ip_route_output_flow+0x23/0x150 net/ipv4/route.c:2654 ip_route_output_key include/net/route.h:134 [inline] sctp_v4_get_dst+0x391/0x1190 net/sctp/protocol.c:463 sctp_transport_route+0x125/0x350 net/sctp/transport.c:312 sctp_ootb_pkt_new+0x1cf/0x390 net/sctp/sm_statefuns.c:6303 sctp_sf_tabort_8_4_8.constprop.0+0x30/0x420 net/sctp/sm_statefuns.c:3404 sctp_sf_ootb+0x5ba/0x670 net/sctp/sm_statefuns.c:3632 sctp_do_sm+0x162/0x5110 net/sctp/sm_sideeffect.c:1167 sctp_endpoint_bh_rcv+0x405/0x880 net/sctp/endpointola.c:457 sctp_inq_push+0x1da/0x270 net/sctp/inqueue.c:95 sctp_rcv+0x1642/0x3300 net/sctp/input.c:268 ip_local_deliver_finish+0x495/0xc00 net/ipv4/ip_input.c:215 NF_HOOK include/linux/netfilter.h:289 [inline] ip_local_deliver+0x188/0x500 net/ipv4/ip_input.c:256 dst_input include/net/dst.h:461 [inline] ip_rcv_finish+0x1ca/0x2e0 net/ipv4/ip_input.c:414 NF_HOOK include/linux/netfilter.h:289 [inline] ip_rcv+0xca/0x3c0 net/ipv4/ip_input.c:524 __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:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:rcu_read_unlock_special+0x456/0xfc0 kernel/rcu/tree_plugin.h:601 Code: 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 bd 09 00 00 48 83 3d ee 24 a0 08 00 0f 84 37 06 00 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 48 83 c4 40 5b 5d 41 5c 41 5d 41 5e 41 5f c3 c3 48 RSP: 0018:ffff88805a13f6a0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3051 RBX: 0000000000000000 RCX: 1ffff1101250698d RDX: dffffc0000000000 RSI: ffff888092834c70 RDI: 0000000000000286 RBP: ffff888092834734 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880928343c0 R13: ffff888092834736 R14: ffff888092834735 R15: 0000000000000001 __rcu_read_unlock+0x158/0x160 kernel/rcu/tree_plugin.h:428 rcu_read_unlock include/linux/rcupdate.h:680 [inline] __unlock_page_memcg+0x54/0x100 mm/memcontrol.c:1955 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: 0033:0x7fe2b3c31ae9 Code: Bad RIP value. RSP: 002b:00007fe2b11a7188 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: fffffffffffffe00 RBX: 00007fe2b3d44f60 RCX: 00007fe2b3c31ae9 RDX: 000000000000006b RSI: 0000000000000084 RDI: 0000000000000006 RBP: 00007fe2b3c8bf45 R08: 000000000000001c R09: 0000000000000000 R10: 000000002055bfe4 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdaac36dcf R14: 00007fe2b11a7300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 23493 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:lock_release+0x440/0x8b0 kernel/locking/lockdep.c:3931 Code: 83 3d 7b 34 a6 08 00 0f 84 cc 01 00 00 48 8b 3c 24 57 9d 0f 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 49 c7 04 04 00 00 00 00 <48> 8b 44 24 70 65 48 2b 04 25 28 00 00 00 0f 85 67 03 00 00 48 83 RSP: 0018:ffff8880573af068 EFLAGS: 00000086 RAX: dffffc0000000000 RBX: ffff88804bf62680 RCX: 1ffff110097ec5eb RDX: dffffc0000000000 RSI: 0000000000000003 RDI: 0000000000000086 RBP: 0000000000000002 R08: ffffffff8d3cfb88 R09: 0000000000000002 R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff1100ae75e10 R13: 24d8564fabcdcfff R14: ffff88804bf62680 R15: 0000000000000003 FS: 000055555629f400(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002055bfe4 CR3: 0000000099f28000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:158 [inline] _raw_spin_unlock_irqrestore+0x1b/0xe0 kernel/locking/spinlock.c:184 debug_object_activate+0x295/0x450 lib/debugobjects.c:498 debug_object_activate+0x390/0x450 lib/debugobjects.c:513 debug_rcu_head_queue kernel/rcu/rcu.h:193 [inline] __call_rcu.constprop.0+0x31/0x7f0 kernel/rcu/tree.c:2977 sctp_transport_destroy net/sctp/transport.c:182 [inline] sctp_transport_put+0xdb/0x120 net/sctp/transport.c:341 sctp_association_free+0x4c7/0x7b0 net/sctp/associola.c:401 sctp_cmd_delete_tcb net/sctp/sm_sideeffect.c:944 [inline] sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1332 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1199 [inline] sctp_do_sm+0x39ee/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_close+0x43a/0x7f0 net/sctp/socket.c:1582 inet_release+0xd7/0x1e0 net/ipv4/af_inet.c:427 inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:472 __sock_release+0xcd/0x2a0 net/socket.c:599 sock_close+0x15/0x20 net/socket.c:1214 __fput+0x2ce/0x890 fs/file_table.c:278 task_work_run+0x148/0x1c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0xbf3/0x2be0 kernel/exit.c:870 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: 0033:0x7f79583b0ae9 Code: Bad RIP value. RSP: 002b:00007ffe5b392b18 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000001 RBX: 0000000000000000 RCX: 00007f79583b0ae9 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f79584c3f68 RBP: 00007f79584c3f60 R08: 00007f79584c00b0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f79584c9278 R13: 00007ffe5b392c20 R14: 00007f79584c3f60 R15: 00000000000b95d3 ---------------- Code disassembly (best guess): 0: 89 4c 24 28 mov %ecx,0x28(%rsp) 4: e8 2c de 6e 00 callq 0x6ede35 9: 4c 8b 44 24 30 mov 0x30(%rsp),%r8 e: 48 8b 4c 24 28 mov 0x28(%rsp),%rcx 13: e9 06 ff ff ff jmpq 0xffffff1e 18: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1f: fc ff df 22: 48 8b 14 24 mov (%rsp),%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 c4 09 00 00 jne 0x9f8 34: 4c 89 f8 mov %r15,%rax 37: 49 8b 4e 38 mov 0x38(%r14),%rcx 3b: 48 rex.W 3c: ba .byte 0xba 3d: 00 00 add %al,(%rax)