audit: type=1800 audit(1645483816.352:9): pid=9563 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="memory.events" dev="sda1" ino=13923 res=0 watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.4:9549] Modules linked in: irq event stamp: 3997875 hardirqs last enabled at (3997874): [] restore_regs_and_return_to_kernel+0x0/0x2a hardirqs last disabled at (3997875): [] apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:793 softirqs last enabled at (32946): [] __do_softirq+0x68b/0x9ff kernel/softirq.c:314 softirqs last disabled at (35981): [] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (35981): [] irq_exit+0x193/0x240 kernel/softirq.c:409 CPU: 0 PID: 9549 Comm: syz-executor.4 Not tainted 4.14.267-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880b5550080 task.stack: ffff8880a5f08000 RIP: 0010:preempt_count_add+0x88/0x170 kernel/sched/core.c:3110 RSP: 0018:ffff8880ba4077f8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000002 RBX: 0000000000000003 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff8880ba4077c0 RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000001 R10: ffff8880ba407cd0 R11: 0000000000000001 R12: ffff8880ba407958 R13: ffff8880ba407908 R14: ffff88813fe74ac0 R15: ffff8880ba4078d0 FS: 00007fda06dc5700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9948bb4000 CR3: 000000009c46a000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unwind_next_frame+0xc2/0x17d0 arch/x86/kernel/unwind_orc.c:333 __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 audit: type=1804 audit(1645483816.362:10): pid=9558 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.5" name="/root/syzkaller-testdir707826094/syzkaller.ydHuAT/2/memory.events" dev="sda1" ino=13923 res=1 kmem_cache_alloc_node_trace+0x153/0x400 mm/slab.c:3661 __do_kmalloc_node mm/slab.c:3681 [inline] __kmalloc_node_track_caller+0x38/0x70 mm/slab.c:3696 __kmalloc_reserve net/core/skbuff.c:137 [inline] __alloc_skb+0x96/0x510 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:980 [inline] ndisc_alloc_skb+0x134/0x310 net/ipv6/ndisc.c:402 ndisc_send_rs+0x2ec/0x630 net/ipv6/ndisc.c:661 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:__sanitizer_cov_trace_pc+0x23/0x50 kernel/kcov.c:68 RSP: 0018:ffff8880a5f0f7b8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: ffff8880b5550080 RBX: dffffc0000000000 RCX: ffff8880a5f0f9d0 RDX: 0000000000000000 RSI: ffffea0001661a80 RDI: ffff8880a4e0900c RBP: ffff8880a95c2908 R08: ffffffff8b9bad48 R09: 0000000000040411 R10: ffff8880b5550908 R11: ffff8880b5550080 R12: 800000005986b845 R13: ffffc00000000fff R14: 00007fda08522000 R15: 0000000000000001 pte_flags arch/x86/include/asm/pgtable_types.h:428 [inline] pte_present arch/x86/include/asm/pgtable.h:672 [inline] zap_pte_range mm/memory.c:1334 [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+0x92d/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 batman_adv: batadv0: Interface deactivated: batadv_slave_0 __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 batman_adv: batadv0: Removing interface: batadv_slave_0 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 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: 0033:0x7fda08450059 RSP: 002b:00007fda06dc5218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007fda08562f68 RCX: 00007fda08450059 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fda08562f68 RBP: 00007fda08562f60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fda08562f6c R13: 00007ffdc3a86c5f R14: 00007fda06dc5300 R15: 0000000000022000 Code: 65 01 2d 5c 5a c9 7e 0f b6 04 02 38 c3 7c 08 84 c0 0f 85 c1 00 00 00 8b 15 36 c8 b3 0a 85 d2 75 11 65 8b 05 3b 5a c9 7e 0f b6 c0 <3d> f4 00 00 00 7f 60 65 8b 05 2a 5a c9 7e 25 ff ff ff 7f 39 c5 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 7990 Comm: syz-executor.1 Not tainted 4.14.267-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880abe2c2c0 task.stack: ffff88809c358000 RIP: 0010:__read_once_size include/linux/compiler.h:185 [inline] RIP: 0010:csd_lock_wait kernel/smp.c:108 [inline] RIP: 0010:smp_call_function_single+0x181/0x370 kernel/smp.c:302 RSP: 0018:ffff88809c35fa60 EFLAGS: 00000297 RAX: ffff8880abe2c2c0 RBX: 1ffff1101386bf50 RCX: 1ffffffff1198fac RDX: 0000000000000000 RSI: ffff88809c35faa0 RDI: ffff88809c35faa0 RBP: ffff88809c35fb08 R08: ffff8880abe2c2c0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88809c35fbc0 R14: 0000000000000001 R15: 0000000000000001 FS: 0000555555a4b400(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7edbdb53a5 CR3: 000000009c46a000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: smp_call_function_many+0x60f/0x7a0 kernel/smp.c:434 flush_tlb_others arch/x86/include/asm/paravirt.h:309 [inline] flush_tlb_mm_range+0x158/0x2f0 arch/x86/mm/tlb.c:709 dup_mmap kernel/fork.c:721 [inline] dup_mm kernel/fork.c:1200 [inline] copy_mm kernel/fork.c:1255 [inline] copy_process.part.0+0x5fd9/0x71c0 kernel/fork.c:1791 copy_process kernel/fork.c:1606 [inline] _do_fork+0x184/0xc80 kernel/fork.c:2092 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f7edad6764b RSP: 002b:00007ffee301bd10 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7edad6764b RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000555555a4b400 R10: 0000555555a4b6d0 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffee301bdf0 Code: ca 08 00 48 8b 54 24 10 4c 89 e9 8b 7c 24 1c 48 8d 74 24 40 e8 71 fa ff ff 41 89 c4 8b 44 24 58 a8 01 74 0f e8 e1 c9 08 00 f3 90 <8b> 44 24 58 a8 01 75 f1 e8 d2 c9 08 00 e8 cd c9 08 00 bf 01 00 ---------------- Code disassembly (best guess): 0: 65 01 2d 5c 5a c9 7e add %ebp,%gs:0x7ec95a5c(%rip) # 0x7ec95a63 7: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax b: 38 c3 cmp %al,%bl d: 7c 08 jl 0x17 f: 84 c0 test %al,%al 11: 0f 85 c1 00 00 00 jne 0xd8 17: 8b 15 36 c8 b3 0a mov 0xab3c836(%rip),%edx # 0xab3c853 1d: 85 d2 test %edx,%edx 1f: 75 11 jne 0x32 21: 65 8b 05 3b 5a c9 7e mov %gs:0x7ec95a3b(%rip),%eax # 0x7ec95a63 28: 0f b6 c0 movzbl %al,%eax * 2b: 3d f4 00 00 00 cmp $0xf4,%eax <-- trapping instruction 30: 7f 60 jg 0x92 32: 65 8b 05 2a 5a c9 7e mov %gs:0x7ec95a2a(%rip),%eax # 0x7ec95a63 39: 25 ff ff ff 7f and $0x7fffffff,%eax 3e: 39 c5 cmp %eax,%ebp