audit: type=1800 audit(1650549608.679:7): pid=9763 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.4" name="bus" dev="sda1" ino=13928 res=0 watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor.1:9742] Modules linked in: irq event stamp: 5213301 hardirqs last enabled at (5213300): [] restore_regs_and_return_to_kernel+0x0/0x2a hardirqs last disabled at (5213301): [] apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:793 softirqs last enabled at (62742): [] __do_softirq+0x68b/0x9ff kernel/softirq.c:314 softirqs last disabled at (63905): [] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (63905): [] irq_exit+0x193/0x240 kernel/softirq.c:409 CPU: 0 PID: 9742 Comm: syz-executor.1 Not tainted 4.14.276-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880518a0240 task.stack: ffff8880518a8000 RIP: 0010:depot_save_stack+0x0/0x3f0 lib/stackdepot.c:210 RSP: 0018:ffff8880ba4074d0 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000011 RBX: ffff8880b5307700 RCX: 0000000000000010 RDX: 0000000000000010 RSI: 0000000001090220 RDI: ffff8880ba4074e0 RBP: ffff8880b5307740 R08: 0000000000000000 R09: 0000000000000007 R10: 0000000000000000 R11: ffff8880518a0240 R12: 0000000001090220 R13: 0000000000000040 R14: ffff88813fe74940 R15: 00000000000001c0 FS: 00007f31ccf61700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055fca81c2988 CR3: 000000009bd0d000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: save_stack mm/kasan/kasan.c:453 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0x139/0x160 mm/kasan/kasan.c:551 __do_kmalloc_node mm/slab.c:3682 [inline] __kmalloc_node_track_caller+0x4c/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] nlmsg_new include/net/netlink.h:511 [inline] __neigh_notify+0x84/0x150 net/core/neighbour.c:2927 neigh_cleanup_and_release+0x71/0xc0 net/core/neighbour.c:106 neigh_del+0x161/0x1f0 net/core/neighbour.c:141 neigh_forced_gc net/core/neighbour.c:190 [inline] neigh_alloc net/core/neighbour.c:315 [inline] __neigh_create+0xc71/0x19c0 net/core/neighbour.c:499 ip6_finish_output2+0x802/0x1f10 net/ipv6/ip6_output.c:117 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:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:411 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x265/0x910 kernel/locking/qspinlock.c:465 RSP: 0018:ffff8880518af2a0 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000001 RBX: ffff8880ba434f00 RCX: ffffed1015cf4a6c RDX: 0000000000007fb1 RSI: 0000000000000000 RDI: 0000000000000004 RBP: ffff8880ae7a5360 R08: 0000000000000001 R09: 000000000004024e R10: ffff8880518a0b18 R11: ffff8880518a0240 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff8880ae7a5361 R15: ffffed10174869e8 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:669 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:52 [inline] queued_spin_lock include/asm-generic/qspinlock.h:90 [inline] do_raw_spin_lock+0x178/0x200 kernel/locking/spinlock_debug.c:113 spin_lock include/linux/spinlock.h:317 [inline] dd_insert_requests+0xb8/0x830 block/mq-deadline.c:431 blk_mq_sched_insert_requests+0x26b/0x4a0 block/blk-mq-sched.c:415 blk_mq_flush_plug_list+0x606/0xa60 block/blk-mq.c:1536 blk_flush_plug_list+0x2de/0x9f0 block/blk-core.c:3372 blk_finish_plug block/blk-core.c:3436 [inline] blk_finish_plug+0x50/0xa0 block/blk-core.c:3432 do_blockdev_direct_IO fs/direct-io.c:1366 [inline] __blockdev_direct_IO+0x700f/0xdcb0 fs/direct-io.c:1423 ext4_direct_IO_read fs/ext4/inode.c:3852 [inline] ext4_direct_IO+0x549/0x1b80 fs/ext4/inode.c:3888 generic_file_read_iter+0x234/0x21c0 mm/filemap.c:2252 ext4_file_read_iter+0x14b/0x330 fs/ext4/file.c:76 call_read_iter include/linux/fs.h:1774 [inline] generic_file_splice_read+0x3a7/0x5c0 fs/splice.c:307 do_splice_to+0xfb/0x140 fs/splice.c:880 splice_direct_to_actor+0x207/0x730 fs/splice.c:952 do_splice_direct+0x164/0x210 fs/splice.c:1061 do_sendfile+0x47f/0xb30 fs/read_write.c:1441 SYSC_sendfile64 fs/read_write.c:1502 [inline] SyS_sendfile64+0xff/0x110 fs/read_write.c:1488 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f31ce5ec0e9 RSP: 002b:00007f31ccf61168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f31ce6fef60 RCX: 00007f31ce5ec0e9 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004 RBP: 00007f31ce64608d R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000d600 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc3e7423af R14: 00007f31ccf61300 R15: 0000000000022000 Code: 01 00 00 00 44 89 c0 c3 48 8b 07 48 c7 07 00 00 00 00 48 89 04 d5 60 93 8b 8c 44 89 c0 c3 45 31 c0 44 89 c0 c3 66 0f 1f 44 00 00 <41> 57 41 56 41 55 41 54 55 53 48 83 ec 18 44 8b 2f 89 74 24 08 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 9763 Comm: syz-executor.4 Not tainted 4.14.276-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880b47c0040 task.stack: ffff888051688000 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x50 kernel/kcov.c:60 RSP: 0018:ffff8880ba507ba8 EFLAGS: 00000002 RAX: ffff8880b47c0040 RBX: ffff88809fe37488 RCX: 0000000000000017 RDX: 0000000000010000 RSI: 000000293ea64071 RDI: ffff88809fe374a8 RBP: 0000000000002710 R08: ffff88823fff7058 R09: ffff88823fff704f R10: ffff88823fff7057 R11: 0000002acf41e4f9 R12: 000000293ea647b5 R13: 000000293ea620a5 R14: 0000000000000001 R15: 000000293ea620a5 FS: 00007fbc5a7b5700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f20a5439000 CR3: 00000000a9f58000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ktime_add_safe kernel/time/hrtimer.c:317 [inline] hrtimer_add_expires include/linux/hrtimer.h:225 [inline] hrtimer_forward+0xf1/0x1e0 kernel/time/hrtimer.c:827 hrtimer_forward_now include/linux/hrtimer.h:457 [inline] perf_swevent_hrtimer+0x2c3/0x350 kernel/events/core.c:8762 __run_hrtimer kernel/time/hrtimer.c:1223 [inline] __hrtimer_run_queues+0x30b/0xc80 kernel/time/hrtimer.c:1287 hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1079 [inline] smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1104 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793 RIP: 0010:pv_wait_node kernel/locking/qspinlock_paravirt.h:279 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x4e2/0x910 kernel/locking/qspinlock.c:430 RSP: 0018:ffff88805168f2a0 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff10 RAX: 0000000000007959 RBX: ffff8880ba534f00 RCX: 0000000000000004 RDX: 0000000000000000 RSI: 0000000000000003 RDI: dffffc0000000000 RBP: ffff8880ae7a5360 R08: ffffed10174a69e1 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880ba434f00 R13: ffffed10174869e8 R14: ffff8880ba534f08 R15: ffff8880ba434f44 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:669 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:52 [inline] queued_spin_lock include/asm-generic/qspinlock.h:90 [inline] do_raw_spin_lock+0x178/0x200 kernel/locking/spinlock_debug.c:113 spin_lock include/linux/spinlock.h:317 [inline] dd_insert_requests+0xb8/0x830 block/mq-deadline.c:431 blk_mq_sched_insert_requests+0x26b/0x4a0 block/blk-mq-sched.c:415 blk_mq_flush_plug_list+0x606/0xa60 block/blk-mq.c:1536 blk_flush_plug_list+0x2de/0x9f0 block/blk-core.c:3372 blk_finish_plug block/blk-core.c:3436 [inline] blk_finish_plug+0x50/0xa0 block/blk-core.c:3432 do_blockdev_direct_IO fs/direct-io.c:1366 [inline] __blockdev_direct_IO+0x700f/0xdcb0 fs/direct-io.c:1423 ext4_direct_IO_read fs/ext4/inode.c:3852 [inline] ext4_direct_IO+0x549/0x1b80 fs/ext4/inode.c:3888 generic_file_read_iter+0x234/0x21c0 mm/filemap.c:2252 ext4_file_read_iter+0x14b/0x330 fs/ext4/file.c:76 call_read_iter include/linux/fs.h:1774 [inline] generic_file_splice_read+0x3a7/0x5c0 fs/splice.c:307 do_splice_to+0xfb/0x140 fs/splice.c:880 splice_direct_to_actor+0x207/0x730 fs/splice.c:952 do_splice_direct+0x164/0x210 fs/splice.c:1061 do_sendfile+0x47f/0xb30 fs/read_write.c:1441 SYSC_sendfile64 fs/read_write.c:1502 [inline] SyS_sendfile64+0xff/0x110 fs/read_write.c:1488 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7fbc5be400e9 RSP: 002b:00007fbc5a7b5168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fbc5bf52f60 RCX: 00007fbc5be400e9 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004 RBP: 00007fbc5be9a08d R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000d600 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd2a44019f R14: 00007fbc5a7b5300 R15: 0000000000022000 Code: ff ff 48 89 df e8 31 b4 29 00 e9 9f fe ff ff 4c 89 e7 e8 24 b4 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 9b 38 ad 7e ---------------- Code disassembly (best guess): 0: 01 00 add %eax,(%rax) 2: 00 00 add %al,(%rax) 4: 44 89 c0 mov %r8d,%eax 7: c3 retq 8: 48 8b 07 mov (%rdi),%rax b: 48 c7 07 00 00 00 00 movq $0x0,(%rdi) 12: 48 89 04 d5 60 93 8b mov %rax,-0x73746ca0(,%rdx,8) 19: 8c 1a: 44 89 c0 mov %r8d,%eax 1d: c3 retq 1e: 45 31 c0 xor %r8d,%r8d 21: 44 89 c0 mov %r8d,%eax 24: c3 retq 25: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) * 2b: 41 57 push %r15 <-- trapping instruction 2d: 41 56 push %r14 2f: 41 55 push %r13 31: 41 54 push %r12 33: 55 push %rbp 34: 53 push %rbx 35: 48 83 ec 18 sub $0x18,%rsp 39: 44 8b 2f mov (%rdi),%r13d 3c: 89 74 24 08 mov %esi,0x8(%rsp)