FAT-fs (loop5): bogus number of reserved sectors FAT-fs (loop5): Can't find a valid FAT filesystem watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.1:9489] Modules linked in: irq event stamp: 4423537 hardirqs last enabled at (4423536): [] restore_regs_and_return_to_kernel+0x0/0x2a hardirqs last disabled at (4423537): [] apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:793 softirqs last enabled at (26526): [] __do_softirq+0x68b/0x9ff kernel/softirq.c:314 softirqs last disabled at (27067): [] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (27067): [] irq_exit+0x193/0x240 kernel/softirq.c:409 CPU: 0 PID: 9489 Comm: syz-executor.1 Not tainted 4.14.275-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880a3318000 task.stack: ffff888056b40000 RIP: 0010:unwind_next_frame+0xdbd/0x17d0 arch/x86/kernel/unwind_orc.c:491 RSP: 0018:ffff8880ba407160 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000000 RBX: 1ffff11017480e33 RCX: ffffffff8ac8d9ac RDX: 1ffff11017480e44 RSI: ffff8880ba407110 RDI: ffff8880ba407838 RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000000000001 R10: ffff8880ba407868 R11: 0000000000000001 R12: ffff8880ba407255 R13: ffff8880ba407258 R14: ffff8880ba407270 R15: ffff8880ba407220 FS: 00007f2b64bf9700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2dc24000 CR3: 000000009c847000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __save_stack_trace+0x90/0x160 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551 kmem_cache_alloc+0x124/0x3c0 mm/slab.c:3552 kmem_cache_zalloc include/linux/slab.h:651 [inline] fill_pool lib/debugobjects.c:110 [inline] __debug_object_init+0x578/0x7a0 lib/debugobjects.c:341 debug_object_init lib/debugobjects.c:393 [inline] debug_object_activate+0x391/0x490 lib/debugobjects.c:474 debug_rcu_head_queue kernel/rcu/rcu.h:152 [inline] __call_rcu.constprop.0+0x31/0x7d0 kernel/rcu/tree.c:3050 dst_release+0x56/0x80 net/core/dst.c:188 refdst_drop include/net/dst.h:286 [inline] skb_dst_drop include/net/dst.h:298 [inline] __dev_queue_xmit+0x1543/0x2480 net/core/dev.c:3480 neigh_resolve_output+0x4e5/0x870 net/core/neighbour.c:1369 neigh_output include/net/neighbour.h:500 [inline] ip6_finish_output2+0xf48/0x1f10 net/ipv6/ip6_output.c:120 ip6_finish_output+0x5c6/0xd50 net/ipv6/ip6_output.c:192 NF_HOOK_COND include/linux/netfilter.h:239 [inline] ip6_output+0x1c5/0x660 net/ipv6/ip6_output.c:209 dst_output include/net/dst.h:470 [inline] NF_HOOK include/linux/netfilter.h:250 [inline] ndisc_send_skb+0x82a/0x1390 net/ipv6/ndisc.c:483 ndisc_send_rs+0x125/0x630 net/ipv6/ndisc.c:677 addrconf_rs_timer+0x2bb/0x5a0 net/ipv6/addrconf.c:3769 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1280 expire_timers+0x232/0x4d0 kernel/time/timer.c:1319 __run_timers kernel/time/timer.c:1637 [inline] run_timer_softirq+0x1d5/0x5a0 kernel/time/timer.c:1650 __do_softirq+0x24d/0x9ff kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x193/0x240 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:638 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1106 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xa3/0xe0 kernel/locking/spinlock.c:192 RSP: 0018:ffff888056b475a0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff11e1309 RBX: 0000000000000286 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000286 RBP: ffffffff8c03e148 R08: 1ffff11014b4ee73 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888057800000 R13: 0000000000000001 R14: ffffffff8c03e148 R15: ffff8880a5a77380 __debug_check_no_obj_freed lib/debugobjects.c:760 [inline] debug_check_no_obj_freed+0x2c0/0x680 lib/debugobjects.c:776 free_pages_prepare mm/page_alloc.c:1064 [inline] __free_pages_ok+0x215/0xeb0 mm/page_alloc.c:1262 release_pages+0x779/0xbf0 mm/swap.c:788 tlb_flush_mmu_free+0xc1/0x1a0 mm/memory.c:272 zap_pte_range mm/memory.c:1431 [inline] zap_pmd_range mm/memory.c:1466 [inline] zap_pud_range mm/memory.c:1495 [inline] zap_p4d_range mm/memory.c:1516 [inline] unmap_page_range+0x1533/0x1ce0 mm/memory.c:1537 unmap_single_vma+0x147/0x2b0 mm/memory.c:1582 unmap_vmas+0x9d/0x160 mm/memory.c:1612 exit_mmap+0x270/0x4d0 mm/mmap.c:3058 __mmput kernel/fork.c:931 [inline] mmput kernel/fork.c:952 [inline] mmput+0xfa/0x420 kernel/fork.c:947 exit_mm kernel/exit.c:548 [inline] do_exit+0x984/0x2850 kernel/exit.c:855 do_group_exit+0x100/0x2e0 kernel/exit.c:965 get_signal+0x38d/0x1ca0 kernel/signal.c:2412 do_signal+0x7c/0x1550 arch/x86/kernel/signal.c:792 exit_to_usermode_loop+0x160/0x200 arch/x86/entry/common.c:160 prepare_exit_to_usermode+0x1af/0x210 arch/x86/entry/common.c:199 retint_user+0x8/0x18 RIP: 0033:0x7f2b66284049 RSP: 002b:00007f2b64bf9218 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000000 RBX: 00007f2b66396f68 RCX: 00007f2b66284049 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f2b66396f6c RBP: 00007f2b66396f60 R08: 00000039384ef186 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2b66396f6c R13: 00007ffd6b2fb3ef R14: 00007f2b64bf9300 R15: 0000000000022000 Code: ff 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 69 07 00 00 41 39 2f 0f 85 8d 00 00 00 <48> b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02 00 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 9484 Comm: syz-executor.4 Not tainted 4.14.275-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff888056a8e640 task.stack: ffff888056aa0000 RIP: 0010:__sanitizer_cov_trace_pc+0x9/0x50 kernel/kcov.c:65 RSP: 0018:ffff888056aa7af8 EFLAGS: 00000202 RAX: ffff888056a8e640 RBX: 1ffff1100ad54f64 RCX: 1ffff1100ad51ddd RDX: 0000000000000000 RSI: ffff888056a8eec8 RDI: 0000000000000286 RBP: ffff888056aa7bb0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff888056aa7be0 R14: 0000000000000001 R15: ffff888055ca027c FS: 00005555557ca400(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2df27000 CR3: 00000000a292b000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rep_nop arch/x86/include/asm/processor.h:646 [inline] cpu_relax arch/x86/include/asm/processor.h:651 [inline] csd_lock_wait kernel/smp.c:108 [inline] smp_call_function_single+0x17f/0x370 kernel/smp.c:302 task_function_call+0xcc/0x130 kernel/events/core.c:115 event_function_call+0x1e8/0x3c0 kernel/events/core.c:283 perf_remove_from_context+0x89/0x170 kernel/events/core.c:1957 perf_event_release_kernel+0xe4/0x8a0 kernel/events/core.c:4360 perf_release+0x33/0x40 kernel/events/core.c:4443 __fput+0x25f/0x7a0 fs/file_table.c:210 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f6c9b092c8b RSP: 002b:00007ffcbe9b12e0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000007 RCX: 00007f6c9b092c8b RDX: 0000001b2df20000 RSI: 0000001b2df240dc RDI: 0000000000000006 RBP: 00007f6c9b1f4960 R08: 0000000000000000 R09: 00000000e372ef42 R10: 001498add053213d R11: 0000000000000293 R12: 0000000000035662 R13: 00007ffcbe9b13e0 R14: 00007f6c9b1f3030 R15: 0000000000000032 Code: 00 e9 9f fe ff ff 4c 89 e7 e8 04 b1 29 00 e9 2c fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 c0 7f 02 00 <48> 85 c0 74 1a 65 8b 15 fb 3c ad 7e 81 e2 00 01 1f 00 75 0b 8b ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 7: fc ff df a: 4c 89 fa mov %r15,%rdx d: 48 c1 ea 03 shr $0x3,%rdx 11: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax 15: 84 c0 test %al,%al 17: 74 08 je 0x21 19: 3c 03 cmp $0x3,%al 1b: 0f 8e 69 07 00 00 jle 0x78a 21: 41 39 2f cmp %ebp,(%r15) 24: 0f 85 8d 00 00 00 jne 0xb7 * 2a: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax <-- trapping instruction 31: fc ff df 34: 4c 89 ea mov %r13,%rdx 37: 48 c1 ea 03 shr $0x3,%rdx 3b: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)