watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.5:9824] Modules linked in: irq event stamp: 3981597 hardirqs last enabled at (3981596): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (3981597): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (3977538): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (3977541): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (3977541): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 9824 Comm: syz-executor.5 Not tainted 4.19.189-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:preempt_count_sub+0x4b/0x150 kernel/sched/core.c:3267 Code: 0f b6 14 11 38 d0 7c 08 84 d2 0f 85 ef 00 00 00 8b 0d 89 ad e2 0b 85 c9 75 18 65 8b 05 2e 75 c0 7e 25 ff ff ff 7f 39 c3 7f 1a <81> fb fe 00 00 00 76 6a 65 8b 05 16 75 c0 7e f7 db 65 01 1d 0d 75 RSP: 0018:ffff8880ba007778 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000103 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000004 RSI: ffff8880ba007718 RDI: 0000000000000001 RBP: ffff88801a74f700 R08: 0000000000000001 R09: 0000000000000001 R10: ffff8880ba007917 R11: 0000000000074071 R12: ffff88801a748000 R13: ffff8880ba0078ed R14: ffff8880ba0078b8 R15: ffffffff8b9971aa FS: 00007f59a83d3700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f008c9f0ca0 CR3: 000000008fb56000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unwind_next_frame+0xeee/0x1400 arch/x86/kernel/unwind_orc.c:579 __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+0x133/0x3b0 mm/slab.c:3647 __alloc_skb+0x71/0x560 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:995 [inline] mrp_pdu_init net/802/mrp.c:303 [inline] mrp_pdu_append_vecattr_event+0x7d2/0x1050 net/802/mrp.c:402 mrp_attr_event+0x15d/0x220 net/802/mrp.c:497 mrp_mad_event net/802/mrp.c:577 [inline] mrp_join_timer+0x5a/0xc0 net/802/mrp.c:594 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:535 [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:constant_test_bit arch/x86/include/asm/bitops.h:317 [inline] RIP: 0010:PageCompound include/linux/page-flags.h:156 [inline] RIP: 0010:PageHuge+0x27/0x160 mm/hugetlb.c:1367 Code: ff ff ff 41 54 55 53 48 89 fb e8 f4 82 ce ff 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 13 01 00 00 <48> 8b 2b 31 ff 48 c1 ed 0f 83 e5 01 89 ee e8 f6 83 ce ff 40 84 ed RSP: 0018:ffff88801a74f6e0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffffea000125d4c0 RCX: ffffffff81516bc3 RDX: 1ffffd400024ba98 RSI: ffffffff8193db7c RDI: ffffea000125d4c0 RBP: ffffea000125d4c0 R08: 0000000000000000 R09: ffffed1017404552 R10: ffff8880ba022a93 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffffea000125d4c0 R15: 00007f59a8d24000 page_remove_file_rmap+0x3e/0xa30 mm/rmap.c:1218 page_remove_rmap+0xe5/0x120 mm/rmap.c:1300 zap_pte_range mm/memory.c:1350 [inline] zap_pmd_range mm/memory.c:1452 [inline] zap_pud_range mm/memory.c:1481 [inline] zap_p4d_range mm/memory.c:1502 [inline] unmap_page_range+0x12f6/0x2a70 mm/memory.c:1523 unmap_single_vma+0x198/0x300 mm/memory.c:1568 unmap_vmas+0xa9/0x180 mm/memory.c:1598 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: 0033:0x4665f9 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:00007f59a83d3188 EFLAGS: 00000246 ORIG_RAX: 000000000000010e RAX: fffffffffffffdfe RBX: 000000000056bf60 RCX: 00000000004665f9 RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000040 RBP: 00000000004bfce1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000140 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffc8c81623f R14: 00007f59a83d3300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 9884 Comm: syz-executor.4 Not tainted 4.19.189-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__rb_erase_augmented include/linux/rbtree_augmented.h:168 [inline] RIP: 0010:rb_erase+0x0/0x1290 lib/rbtree.c:459 Code: 86 3c aa f9 48 8b 54 24 10 4c 8b 44 24 08 e9 1c f8 ff ff 4c 89 ff 48 89 54 24 08 e8 9a 39 aa f9 48 8b 54 24 08 e9 31 f9 ff ff <48> b8 00 00 00 00 00 fc ff df 41 57 49 89 f7 41 56 41 55 41 54 49 RSP: 0018:ffff8880ba107dd0 EFLAGS: 00000006 RAX: ffff88801165a500 RBX: ffff888011988c98 RCX: 1ffff110174249a9 RDX: 0000000000010000 RSI: ffff8880ba124d40 RDI: ffff888011988c98 RBP: ffff8880ba124d40 R08: 0000000000000000 R09: ffff8880ba125560 R10: 0000000000000006 R11: ffffffff8c66305b R12: ffff8880ba124d48 R13: ffff888011988c98 R14: ffff8880ba124d00 R15: dffffc0000000000 FS: 00007f1c3eb89700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f33fba49718 CR3: 000000008f33a000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: timerqueue_del+0x7f/0x140 lib/timerqueue.c:87 __remove_hrtimer kernel/time/hrtimer.c:1004 [inline] __run_hrtimer kernel/time/hrtimer.c:1401 [inline] __hrtimer_run_queues+0x2ea/0xe60 kernel/time/hrtimer.c:1481 hrtimer_interrupt+0x326/0x9e0 kernel/time/hrtimer.c:1539 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:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:lock_release+0x429/0x8b0 kernel/locking/lockdep.c:3930 Code: 84 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 95 03 00 00 48 83 3d db 54 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 RSP: 0018:ffff888013fbf690 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3049 RBX: ffff88801165a500 RCX: 1ffff110022cb5b6 RDX: dffffc0000000000 RSI: 0000000000000002 RDI: 0000000000000282 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff110027f7ed5 R13: af95cb6746fc68d3 R14: ffff88801165a500 R15: 0000000000000002 page_remove_rmap+0xe5/0x120 mm/rmap.c:1300 zap_pte_range mm/memory.c:1350 [inline] zap_pmd_range mm/memory.c:1452 [inline] zap_pud_range mm/memory.c:1481 [inline] zap_p4d_range mm/memory.c:1502 [inline] unmap_page_range+0x12f6/0x2a70 mm/memory.c:1523 unmap_single_vma+0x198/0x300 mm/memory.c:1568 unmap_vmas+0xa9/0x180 mm/memory.c:1598 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: 0033:0x4665f9 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:00007f1c3eb89188 EFLAGS: 00000246 ORIG_RAX: 000000000000010e RAX: fffffffffffffdfe RBX: 000000000056bf60 RCX: 00000000004665f9 RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000040 RBP: 00000000004bfce1 R08: 0000000020000200 R09: 0000000000000000 R10: 0000000020000140 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffc525700ff R14: 00007f1c3eb89300 R15: 0000000000022000