watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.2:19514] Modules linked in: irq event stamp: 2906749 hardirqs last enabled at (2906748): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (2906749): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (2828850): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (2828853): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (2828853): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 1 PID: 19514 Comm: syz-executor.2 Not tainted 4.19.209-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:lock_acquire+0x1ec/0x3c0 kernel/locking/lockdep.c:3911 Code: 08 00 00 00 00 00 00 48 c1 e8 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 RSP: 0018:ffff8880ba106ea0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3051 RBX: ffff8880928e0000 RCX: fc9a007485786c54 RDX: dffffc0000000000 RSI: 000000005ff3f86a RDI: 0000000000000286 RBP: ffffffff89f85fa0 R08: 000000009b41ccd3 R09: 0000000000000005 R10: ffff8880928e0950 R11: 0000000000074071 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000002 R15: 0000000000000000 FS: 00007f9f309c5700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 Bluetooth: hci6: command 0x0406 tx timeout CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa20afb2718 CR3: 00000000712dc000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lock_acquire include/linux/rcupdate.h:242 [inline] rcu_read_lock include/linux/rcupdate.h:627 [inline] is_bpf_text_address+0x36/0x1b0 kernel/bpf/core.c:546 kernel_text_address kernel/extable.c:152 [inline] kernel_text_address+0xbd/0xf0 kernel/extable.c:122 __kernel_text_address+0x9/0x30 kernel/extable.c:107 unwind_get_return_address arch/x86/kernel/unwind_orc.c:297 [inline] unwind_get_return_address+0x51/0x90 arch/x86/kernel/unwind_orc.c:292 __save_stack_trace+0xaf/0x190 arch/x86/kernel/stacktrace.c:45 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+0x133/0x3b0 mm/slab.c:3647 __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:__unlock_page_memcg+0x4/0x100 mm/memcontrol.c:1946 Code: 8b 04 24 e9 90 fd ff ff e8 d9 9c f9 ff e9 ca fd ff ff e8 5f 9d f9 ff e9 f4 fe ff ff 66 2e 0f 1f 84 00 00 00 00 00 48 85 ff 53 <74> 37 48 b8 00 00 00 00 00 fc ff df 48 89 fb 48 8d bf 88 06 00 00 RSP: 0018:ffff88809338f730 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff818fb155 RDX: 1ffffd400059ba6f RSI: ffffffff818fb11a RDI: 0000000000000000 RBP: ffffea0002cdd340 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: dead000000000100 R15: 00007f9f321b4000 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: 0033:0x7f9f3344e8d9 Code: Bad RIP value. RSP: 002b:00007f9f309c5188 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: fffffffffffffe00 RBX: 00007f9f33552f60 RCX: 00007f9f3344e8d9 RDX: 000000000000006b RSI: 0000000000000084 RDI: 0000000000000005 RBP: 00007f9f334a8cb4 R08: 000000000000001c R09: 0000000000000000 R10: 000000002055bfe4 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff6cccf71f R14: 00007f9f309c5300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 14509 Comm: syz-executor.3 Not tainted 4.19.209-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__read_once_size include/linux/compiler.h:263 [inline] RIP: 0010:csd_lock_wait kernel/smp.c:108 [inline] RIP: 0010:smp_call_function_single+0x1db/0x420 kernel/smp.c:302 Code: 00 e8 09 04 0a 00 48 8b 4c 24 08 48 8b 54 24 10 48 8d 74 24 40 8b 7c 24 1c e8 a1 f9 ff ff 41 89 c5 eb 07 e8 e7 03 0a 00 f3 90 <44> 8b 64 24 58 31 ff 41 83 e4 01 44 89 e6 e8 42 05 0a 00 45 85 e4 RSP: 0000:ffff8880712ef8c0 EFLAGS: 00000293 RAX: ffff88809ef245c0 RBX: 1ffff1100e25df1c RCX: ffffffff8158819e RDX: 0000000000000000 RSI: ffffffff81588189 RDI: 0000000000000005 RBP: ffff8880712ef990 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000002 FS: 00005555565c0400(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555565c9848 CR3: 00000000712dc000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: smp_call_function_many+0x743/0x8d0 kernel/smp.c:434 flush_tlb_others arch/x86/include/asm/paravirt.h:309 [inline] flush_tlb_mm_range+0x179/0x320 arch/x86/mm/tlb.c:728 flush_tlb_page arch/x86/include/asm/tlbflush.h:576 [inline] ptep_clear_flush+0x123/0x160 mm/pgtable-generic.c:87 wp_page_copy+0xaf2/0x2c40 mm/memory.c:2654 do_wp_page+0x2d4/0x2210 mm/memory.c:2903 handle_pte_fault mm/memory.c:4191 [inline] __handle_mm_fault+0x258b/0x41c0 mm/memory.c:4299 handle_mm_fault+0x436/0xb10 mm/memory.c:4336 __do_page_fault+0x68e/0xd60 arch/x86/mm/fault.c:1412 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1205 RIP: 0033:0x7fa20da2b8a5 Code: e8 4b 8d 0c 2f 48 8b 6c 24 18 48 39 d3 48 89 4b 60 0f 95 c2 48 83 c8 01 0f b6 d2 48 c1 e2 02 4c 09 ea 48 83 ca 01 49 89 57 08 <48> 89 41 08 49 83 c7 10 eb b3 48 8d 3d fa d8 09 00 e8 75 c9 ff ff RSP: 002b:00007fffe1c5f4c0 EFLAGS: 00010206 RAX: 00000000000187c1 RBX: 00007fa20db405e0 RCX: 00005555565c9840 RDX: 0000000000008041 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 0000000000008030 R08: 0000000000000003 R09: 00007fa20db40640 R10: 0000000000000231 R11: 0000000000000000 R12: 0000000000000802 R13: 0000000000008040 R14: 0000000000000804 R15: 00005555565c1800 ---------------- Code disassembly (best guess): 0: 08 00 or %al,(%rax) 2: 00 00 add %al,(%rax) 4: 00 00 add %al,(%rax) 6: 00 48 c1 add %cl,-0x3f(%rax) 9: e8 03 80 3c 10 callq 0x103c8011 e: 00 0f add %cl,(%rdi) 10: 85 b7 01 00 00 48 test %esi,0x48000001(%rdi) 16: 83 3d 09 2e a6 08 00 cmpl $0x0,0x8a62e09(%rip) # 0x8a62e26 1d: 0f 84 2a 01 00 00 je 0x14d 23: 48 8b 7c 24 08 mov 0x8(%rsp),%rdi 28: 57 push %rdi 29: 9d popfq * 2a: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) <-- trapping instruction 2f: 48 83 c4 18 add $0x18,%rsp 33: 5b pop %rbx 34: 5d pop %rbp 35: 41 5c pop %r12 37: 41 5d pop %r13 39: 41 5e pop %r14 3b: 41 5f pop %r15 3d: c3 retq 3e: 65 gs 3f: 8b .byte 0x8b