watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.5:13004] Modules linked in: irq event stamp: 2509069 hardirqs last enabled at (2509068): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (2509069): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (3546): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (3819): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (3819): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 13004 Comm: syz-executor.5 Not tainted 4.19.206-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:get_reg+0x50/0x1f0 arch/x86/kernel/unwind_orc.c:377 Code: b3 8a b5 41 48 8d 6c 24 08 48 c7 44 24 10 d4 a8 b6 89 48 c1 ed 03 48 c7 44 24 18 30 8d 29 81 48 8d 54 05 00 c7 02 f1 f1 f1 f1 42 04 00 f3 f3 f3 48 89 fa 65 48 8b 0c 25 28 00 00 00 48 89 4c RSP: 0018:ffff8880ba0076d0 EFLAGS: 00000a06 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff8880ba007890 RCX: ffffffff8b95619d RDX: ffffed1017400edb RSI: 0000000000000004 RDI: ffff8880ba0078e0 RBP: 1ffff11017400edb R08: ffffffff8b95619c R09: ffffffff8b95615c R10: ffff8880ba0078ef R11: 0000000000074071 R12: ffff8880119877b0 R13: ffff8880ba0077e8 R14: ffff8880ba007890 R15: ffffffff8b956198 FS: 00007f43f6950700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2fc25000 CR3: 00000000121a0000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unwind_next_frame+0xdfc/0x1400 arch/x86/kernel/unwind_orc.c:550 __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] 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:261 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x34/0x50 kernel/kcov.c:106 Code: df 01 00 65 8b 15 7c 4c 9f 7e 81 e2 00 01 1f 00 75 2b 8b 90 60 13 00 00 83 fa 02 75 20 48 8b 88 68 13 00 00 8b 80 64 13 00 00 <48> 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 c3 0f 1f RSP: 0018:ffff8880119877a8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000040000 RBX: ffff888011987b00 RCX: ffffc90010968000 RDX: 0000000000000002 RSI: ffffffff81c02852 RDI: 0000000000000005 RBP: ffffea00013f1040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: dffffc0000000000 R13: ffffea00013f1048 R14: 0000000000000000 R15: 0000000000000000 page_mapcount include/linux/mm.h:642 [inline] smaps_account+0x892/0x11e0 fs/proc/task_mmu.c:463 smaps_pte_entry fs/proc/task_mmu.c:547 [inline] smaps_pte_range+0x778/0x1510 fs/proc/task_mmu.c:604 walk_pmd_range mm/pagewalk.c:51 [inline] walk_pud_range mm/pagewalk.c:109 [inline] walk_p4d_range mm/pagewalk.c:135 [inline] walk_pgd_range+0x8fe/0x1150 mm/pagewalk.c:161 __walk_page_range mm/pagewalk.c:254 [inline] walk_page_vma+0x259/0x300 mm/pagewalk.c:357 smap_gather_stats+0x176/0x2d0 fs/proc/task_mmu.c:754 show_smap+0xa5/0x5e0 fs/proc/task_mmu.c:792 seq_read+0x4e0/0x11c0 fs/seq_file.c:232 __vfs_read+0xf7/0x750 fs/read_write.c:416 vfs_read+0x194/0x3c0 fs/read_write.c:452 ksys_read+0x12b/0x2a0 fs/read_write.c:579 ieee802154 phy0 wpan0: encryption failed: -22 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f43f93fa739 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:00007f43f6950188 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007f43f94ff038 RCX: 00007f43f93fa739 RDX: 0000000000002020 RSI: 000000002000c200 RDI: 0000000000000003 RBP: 00007f43f9454cc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f43f94ff038 R13: 00007fff3caba3bf R14: 00007f43f6950300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 27144 Comm: syz-executor.0 Not tainted 4.19.206-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:check_kcov_mode kernel/kcov.c:67 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x14/0x50 kernel/kcov.c:101 Code: 35 00 e9 23 fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 34 24 65 48 8b 04 25 c0 df 01 00 65 8b 15 7c 4c 9f 7e <81> e2 00 01 1f 00 75 2b 8b 90 60 13 00 00 83 fa 02 75 20 48 8b 88 RSP: 0018:ffff8880ba107f50 EFLAGS: 00000006 RAX: ffff8880a35c8440 RBX: ffffffff8a45f1a0 RCX: 0000000000000001 RDX: 0000000080010003 RSI: ffffffff83771e85 RDI: ffffffff88b3e0a0 RBP: ffffffff88b3e0a0 R08: ffffffff8c664058 R09: 0000000000000000 R10: 0000000000000005 R11: ffffffff8c66405b R12: 0000000000000000 R13: ffffffff88b3e060 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f20d3d5c700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3060013248 CR3: 0000000098316000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: check_preemption_disabled+0x15/0x280 lib/smp_processor_id.c:13 rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:348 [inline] rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:1025 rcu_read_lock_sched_held+0xc6/0x1d0 kernel/rcu/update.c:113 trace_local_timer_entry arch/x86/include/asm/trace/irq_vectors.h:56 [inline] smp_apic_timer_interrupt+0x3fb/0x550 arch/x86/kernel/apic/apic.c:1095 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x50 kernel/kcov.c:97 Code: ff 48 89 df e8 11 d3 35 00 e9 ab fe ff ff 4c 89 ef e8 04 d3 35 00 e9 23 fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <48> 8b 34 24 65 48 8b 04 25 c0 df 01 00 65 8b 15 7c 4c 9f 7e 81 e2 RSP: 0018:ffff88803765f768 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 8000000000000007 RCX: ffffffff818ba221 RDX: 0000000000000000 RSI: ffff8880a35c8440 RDI: 0000000000000005 RBP: ffffea000297fac8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000 R13: ffffea000297fac0 R14: dffffc0000000000 R15: 00007f20d6613000 pte_young arch/x86/include/asm/pgtable.h:143 [inline] zap_pte_range mm/memory.c:1345 [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+0x12df/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:1015 [inline] mmput+0x14e/0x4a0 kernel/fork.c:1036 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: 0033:0x7f20d67e5739 Code: Bad RIP value. RSP: 002b:00007f20d3d5c218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f20d68e9f88 RCX: 00007f20d67e5739 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f20d68e9f88 RBP: 00007f20d68e9f80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f20d68e9f8c R13: 00007ffd55d3701f R14: 00007f20d3d5c300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: b3 8a mov $0x8a,%bl 2: b5 41 mov $0x41,%ch 4: 48 8d 6c 24 08 lea 0x8(%rsp),%rbp 9: 48 c7 44 24 10 d4 a8 movq $0xffffffff89b6a8d4,0x10(%rsp) 10: b6 89 12: 48 c1 ed 03 shr $0x3,%rbp 16: 48 c7 44 24 18 30 8d movq $0xffffffff81298d30,0x18(%rsp) 1d: 29 81 1f: 48 8d 54 05 00 lea 0x0(%rbp,%rax,1),%rdx 24: c7 02 f1 f1 f1 f1 movl $0xf1f1f1f1,(%rdx) * 2a: c7 42 04 00 f3 f3 f3 movl $0xf3f3f300,0x4(%rdx) <-- trapping instruction 31: 48 89 fa mov %rdi,%rdx 34: 65 48 8b 0c 25 28 00 mov %gs:0x28,%rcx 3b: 00 00 3d: 48 rex.W 3e: 89 .byte 0x89 3f: 4c rex.WR