netlink: 'syz-executor.4': attribute type 1 has an invalid length. watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.2:14124] Modules linked in: irq event stamp: 4143713 hardirqs last enabled at (4143712): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (4143713): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (690244): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (690565): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (690565): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 1 PID: 14124 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [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:184 Code: 48 c7 c0 88 82 f1 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 2f 48 83 3d 7c 31 d8 01 00 74 15 48 89 df 57 9d <0f> 1f 44 00 00 eb b2 e8 fb eb e6 f8 eb c0 0f 0b 0f 0b 48 c7 c7 88 RSP: 0018:ffff8880ba107c28 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3051 RBX: 0000000000000286 RCX: 1ffff11003c0e5c9 RDX: dffffc0000000000 RSI: ffff88801e072e28 RDI: 0000000000000286 RBP: ffff8880ba122b40 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000022b40 R14: 0000000000000000 R15: ffff8880ba122b40 FS: 00007f734fd90700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2b6e94b718 CR3: 0000000014828000 CR4: 00000000003426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __mod_timer kernel/time/timer.c:1071 [inline] mod_timer+0x4ea/0x1010 kernel/time/timer.c:1114 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:unhash_mnt+0x367/0x470 fs/namespace.c:806 Code: 89 ee e8 ec 10 b8 ff 85 ed 75 0d e8 73 0f b8 ff 4c 89 e7 e8 6b f6 ff ff e8 66 0f b8 ff 4c 89 ea 48 b8 00 00 00 00 00 fc ff df <48> c1 ea 03 80 3c 02 00 75 3c 48 c7 83 e8 00 00 00 00 00 00 00 5b RSP: 0018:ffff8881e32a7b90 EFLAGS: 00000212 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff888094406e00 RCX: ffffc9000cc45000 RDX: ffff888094406ee8 RSI: ffffffff81aa760a RDI: 0000000000000005 RBP: 0000000000000028 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffff88809c315900 R13: ffff888094406ee8 R14: ffff888094406e60 R15: ffff888094406e10 umount_mnt fs/namespace.c:826 [inline] umount_tree+0x928/0xc80 fs/namespace.c:1460 attach_recursive_mnt+0x817/0xd80 fs/namespace.c:2056 graft_tree+0x187/0x210 fs/namespace.c:2120 do_loopback fs/namespace.c:2228 [inline] do_mount+0x219b/0x2f50 fs/namespace.c:2816 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f735281aa39 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:00007f734fd90188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f735291df60 RCX: 00007f735281aa39 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000020000000 RBP: 00007f7352874c5f R08: 0000000000000000 R09: 0000000000000000 R10: 00000000000c50c4 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffa33a3e6f R14: 00007f734fd90300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 14137 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:mark_held_locks+0x65/0xf0 kernel/locking/lockdep.c:2799 Code: 85 80 08 00 00 85 c0 7e 72 8d 2c b5 00 00 00 00 31 db 49 be 00 00 00 00 00 fc ff df 44 8d 65 02 83 c5 03 4d 8d bd 88 08 00 00 <48> 63 c3 48 8d 04 80 49 8d 34 c7 48 8d 7e 22 48 89 f8 48 89 fa 48 RSP: 0018:ffff8880ba007c58 EFLAGS: 00000002 RAX: 0000000000000002 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000003 RSI: ffff88808b884a88 RDI: ffff88808b884aaa RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000002 R13: ffff88808b884200 R14: dffffc0000000000 R15: ffff88808b884a88 FS: 00007f16ee5b1700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f16ee5b0fe8 CR3: 000000004176d000 CR4: 00000000003426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __trace_hardirqs_on_caller kernel/locking/lockdep.c:2831 [inline] lockdep_hardirqs_on+0x288/0x5c0 kernel/locking/lockdep.c:2884 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irqrestore+0x79/0xe0 kernel/locking/spinlock.c:184 spin_unlock_irqrestore include/linux/spinlock.h:384 [inline] skb_dequeue+0x125/0x180 net/core/skbuff.c:2839 garp_queue_xmit net/802/garp.c:274 [inline] garp_join_timer+0xc3/0xf0 net/802/garp.c:426 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:263 [inline] RIP: 0010:__read_seqcount_begin include/linux/seqlock.h:113 [inline] RIP: 0010:raw_read_seqcount_begin include/linux/seqlock.h:148 [inline] RIP: 0010:read_seqcount_begin include/linux/seqlock.h:165 [inline] RIP: 0010:read_seqbegin include/linux/seqlock.h:440 [inline] RIP: 0010:path_init+0x1271/0x19d0 fs/namei.c:2206 Code: 82 bc ff 45 84 f6 0f 84 87 f0 ff ff eb c5 48 b8 00 00 00 00 00 fc ff df 49 c1 ee 03 4c 01 f0 48 89 45 c0 e8 e1 80 bc ff f3 90 <48> 8b 45 c0 0f b6 00 84 c0 74 08 3c 03 0f 8e 93 05 00 00 44 8b 3d RSP: 0018:ffff88818706fad8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000040000 RBX: 0000000000000040 RCX: ffffc9000a2fe000 RDX: 0000000000040000 RSI: ffffffff81a6048f RDI: 0000000000000001 RBP: ffff88818706fb60 R08: ffffffff8cd41398 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff88818706fce0 R13: ffffffff89f18280 R14: 0000000000000001 R15: 000000000000dfb3 path_openat+0x185/0x2df0 fs/namei.c:3535 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f16f0fee954 Code: 84 00 00 00 00 00 44 89 54 24 0c e8 96 f9 ff ff 44 8b 54 24 0c 44 89 e2 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 89 44 24 0c e8 c8 f9 ff ff 8b 44 RSP: 002b:00007f16ee5b0ed0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f16f1085970 RCX: 00007f16f0fee954 RDX: 0000000000000002 RSI: 00007f16ee5b1000 RDI: 00000000ffffff9c RBP: 00007f16ee5b1000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002 R13: 0000000000000006 R14: 0000000020000728 R15: 0000000000000037 ---------------- Code disassembly (best guess): 0: 48 c7 c0 88 82 f1 89 mov $0xffffffff89f18288,%rax 7: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx e: fc ff df 11: 48 c1 e8 03 shr $0x3,%rax 15: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1) 19: 75 2f jne 0x4a 1b: 48 83 3d 7c 31 d8 01 cmpq $0x0,0x1d8317c(%rip) # 0x1d8319f 22: 00 23: 74 15 je 0x3a 25: 48 89 df mov %rbx,%rdi 28: 57 push %rdi 29: 9d popfq * 2a: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) <-- trapping instruction 2f: eb b2 jmp 0xffffffe3 31: e8 fb eb e6 f8 callq 0xf8e6ec31 36: eb c0 jmp 0xfffffff8 38: 0f 0b ud2 3a: 0f 0b ud2 3c: 48 rex.W 3d: c7 .byte 0xc7 3e: c7 (bad) 3f: 88 .byte 0x88