watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.3:9436] Modules linked in: irq event stamp: 2324363 hardirqs last enabled at (2324362): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (2324363): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (2316248): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (2316251): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (2316251): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 9436 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:unwind_get_return_address+0x24/0x90 arch/x86/kernel/unwind_orc.c:294 Code: 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 48 c1 ea 03 53 48 89 fb 0f b6 04 02 84 c0 74 04 3c 03 7e 51 8b 03 <85> c0 75 05 5b 31 c0 5d c3 48 8d 6b 48 48 b8 00 00 00 00 00 fc ff RSP: 0018:ffff8880ba007868 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000002 RBX: ffff8880ba007890 RCX: 0000000000000000 RDX: 1ffff11017400f12 RSI: ffff8880ba0076f0 RDI: ffff8880ba007890 RBP: ffff8880ba007910 R08: 0000000000000001 R09: 0000000000000001 R10: ffff8880ba0078ef R11: 0000000000074071 R12: ffff8880ba007928 R13: 0000000000000000 R14: ffff88813bff0c40 R15: 0000000000000740 FS: 00007f13ac866700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c00c0d8000 CR3: 0000000009e6d000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __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 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] mrp_pdu_init net/802/mrp.c:316 [inline] mrp_pdu_append_vecattr_event+0x7d2/0x1050 net/802/mrp.c:415 mrp_attr_event+0x15d/0x220 net/802/mrp.c:510 mrp_mad_event net/802/mrp.c:590 [inline] mrp_join_timer+0x5a/0xc0 net/802/mrp.c:607 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:__read_once_size include/linux/compiler.h:263 [inline] RIP: 0010:compound_head include/linux/page-flags.h:142 [inline] RIP: 0010:PageAnon include/linux/page-flags.h:418 [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+0x124a/0x2c50 mm/memory.c:1534 Code: 39 79 18 48 0f 43 41 18 4d 85 ed 48 89 41 18 0f 84 36 fe ff ff e8 36 e7 d6 ff 49 8d 6d 08 48 89 e8 48 c1 e8 03 42 80 3c 30 00 <0f> 85 df 16 00 00 49 8b 45 08 31 ff 4d 89 ec 48 89 c3 48 89 84 24 RSP: 0018:ffff8882303af770 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 1ffffd400054ed39 RBX: 0000000000000001 RCX: ffff8882303af9b0 RDX: 0000000000000000 RSI: ffffffff818b9e3a RDI: ffff8882303af9c8 RBP: ffffea0002a769c8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 80000000a9da7007 R13: ffffea0002a769c0 R14: dffffc0000000000 R15: 00007f13ad0aa000 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: 0033:0x7f13adef1049 Code: Bad RIP value. RSP: 002b:00007f13ac866168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: 0000000000000004 RBX: 00007f13ae003f60 RCX: 00007f13adef1049 RDX: 0000000000000002 RSI: 0000000020000140 RDI: ffffffffffffff9c RBP: 00007f13adf4b08d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffebcc8a41f R14: 00007f13ac866300 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): 0: 84 00 test %al,(%rax) 2: 00 00 add %al,(%rax) 4: 00 00 add %al,(%rax) 6: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax d: fc ff df 10: 48 89 fa mov %rdi,%rdx 13: 55 push %rbp 14: 48 c1 ea 03 shr $0x3,%rdx 18: 53 push %rbx 19: 48 89 fb mov %rdi,%rbx 1c: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax 20: 84 c0 test %al,%al 22: 74 04 je 0x28 24: 3c 03 cmp $0x3,%al 26: 7e 51 jle 0x79 28: 8b 03 mov (%rbx),%eax * 2a: 85 c0 test %eax,%eax <-- trapping instruction 2c: 75 05 jne 0x33 2e: 5b pop %rbx 2f: 31 c0 xor %eax,%eax 31: 5d pop %rbp 32: c3 retq 33: 48 8d 6b 48 lea 0x48(%rbx),%rbp 37: 48 rex.W 38: b8 00 00 00 00 mov $0x0,%eax 3d: 00 fc add %bh,%ah 3f: ff .byte 0xff