netlink: 12 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 'syz-executor.2': attribute type 7 has an invalid length. netlink: 'syz-executor.0': attribute type 7 has an invalid length. netlink: 'syz-executor.1': attribute type 7 has an invalid length. watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.0:22321] Modules linked in: irq event stamp: 3242952 hardirqs last enabled at (3242951): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (3242952): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (3237932): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 kernel/softirq.c:318 softirqs last disabled at (3237819): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (3237819): [] invoke_softirq kernel/softirq.c:372 [inline] kernel/softirq.c:412 softirqs last disabled at (3237819): [] irq_exit+0x215/0x260 kernel/softirq.c:412 kernel/softirq.c:412 CPU: 0 PID: 22321 Comm: syz-executor.0 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:435 [inline] RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:435 [inline] kernel/locking/qspinlock.c:474 RIP: 0010:__pv_queued_spin_lock_slowpath+0x3a6/0xae0 kernel/locking/qspinlock.c:474 kernel/locking/qspinlock.c:474 Code: eb c6 45 01 01 41 bc 00 80 00 00 48 c1 e9 03 83 e3 07 41 be 01 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8d 2c 01 eb 0c f3 90 <41> 83 ec 01 0f 84 38 04 00 00 41 0f b6 45 00 38 d8 7f 08 84 c0 0f RSP: 0018:ffff88807418f5b8 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000003 RBX: 0000000000000000 RCX: 1ffff11046a16428 RDX: 0000000000000001 RSI: ffffffff8167a995 RDI: 0000000000000286 RBP: ffff8882350b2140 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 00000000000000f2 R13: ffffed1046a16428 R14: 0000000000000001 R15: ffff8880ba02be00 FS: 00007f06dec3b700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5e3fac3fc8 CR3: 000000007d849000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:679 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:53 [inline] queued_spin_lock include/asm-generic/qspinlock.h:88 [inline] pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:679 [inline] kernel/locking/spinlock_debug.c:113 queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:53 [inline] kernel/locking/spinlock_debug.c:113 queued_spin_lock include/asm-generic/qspinlock.h:88 [inline] kernel/locking/spinlock_debug.c:113 do_raw_spin_lock+0x189/0x220 kernel/locking/spinlock_debug.c:113 kernel/locking/spinlock_debug.c:113 spin_lock include/linux/spinlock.h:329 [inline] ext4_lock_group fs/ext4/ext4.h:3022 [inline] spin_lock include/linux/spinlock.h:329 [inline] fs/ext4/ialloc.c:945 ext4_lock_group fs/ext4/ext4.h:3022 [inline] fs/ext4/ialloc.c:945 __ext4_new_inode+0x2dee/0x5a20 fs/ext4/ialloc.c:945 fs/ext4/ialloc.c:945 ext4_create+0x29e/0x5f0 fs/ext4/namei.c:2517 fs/ext4/namei.c:2517 lookup_open+0x893/0x1a20 fs/namei.c:3235 fs/namei.c:3235 do_last fs/namei.c:3327 [inline] do_last fs/namei.c:3327 [inline] fs/namei.c:3537 path_openat+0x1094/0x2df0 fs/namei.c:3537 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f06df528e99 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:00007f06dec3b168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f06df63c1d0 RCX: 00007f06df528e99 RDX: 00000000000026e1 RSI: 0000000020000280 RDI: ffffffffffffff9c RBP: 00007f06df582ff1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc3d8f797f R14: 00007f06dec3b300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 22345 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:native_apic_mem_write+0x8/0x10 arch/x86/include/asm/apic.h:109 arch/x86/include/asm/apic.h:109 Code: 3d cc 17 3d 0b 01 7f 02 5d c3 89 ef 5d e9 f5 fe c9 06 48 c7 c7 00 97 65 8c e8 84 e2 6f 00 eb df 66 90 89 ff 89 b7 00 c0 5f ff 0f 1f 80 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 53 89 fb 48 RSP: 0018:ffff8880ba107508 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffffffff89cfb1a0 RCX: 0000000000000020 RDX: 1ffffffff139f636 RSI: 00000000000000f5 RDI: 0000000000000380 RBP: ffff8880ba11e2c0 R08: ffffffff8c665058 R09: 0000000000000000 R10: 0000000000000007 R11: ffffffff8c66505b R12: 00000000000000f5 R13: 0000000000000000 R14: ffff8880ba124cc0 R15: ffff8880ba124d30 FS: 00007f9a9a4a6700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fba339b4718 CR3: 0000000079ff8000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: apic_write arch/x86/include/asm/apic.h:389 [inline] apic_write arch/x86/include/asm/apic.h:389 [inline] arch/x86/kernel/apic/apic.c:460 lapic_next_event+0x4d/0x80 arch/x86/kernel/apic/apic.c:460 arch/x86/kernel/apic/apic.c:460 clockevents_program_event+0x234/0x350 kernel/time/clockevents.c:344 kernel/time/clockevents.c:344 tick_program_event+0xac/0x140 kernel/time/tick-oneshot.c:48 kernel/time/tick-oneshot.c:48 hrtimer_interrupt+0x40a/0x9e0 kernel/time/hrtimer.c:1598 kernel/time/hrtimer.c:1598 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1071 [inline] local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1071 [inline] arch/x86/kernel/apic/apic.c:1096 smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1096 arch/x86/kernel/apic/apic.c:1096 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 arch/x86/entry/entry_64.S:894 RIP: 0010:__orc_find+0x4a/0xf0 arch/x86/kernel/unwind_orc.c:46 arch/x86/kernel/unwind_orc.c:46 Code: 49 89 fd 0f 87 9a 00 00 00 49 bf 00 00 00 00 00 fc ff df 49 89 fe 48 89 fd eb 0c 48 8d 6b 04 49 89 de 49 39 ec 72 4d 4c 89 e0 <48> 29 e8 48 89 c2 48 c1 e8 3f 48 c1 fa 02 48 01 d0 48 d1 f8 48 8d RSP: 0018:ffff8880ba107728 EFLAGS: 00000216 ORIG_RAX: ffffffffffffff13 RAX: ffffffff8b3979f8 RBX: ffffffff8b3979e8 RCX: ffffffff81a206e2 RDX: 0000000000000000 RSI: ffffffff8b9a9336 RDI: ffffffff8b3979d8 RBP: ffffffff8b3979ec R08: 0000000000000000 R09: ffffffff8b9a9336 R10: ffff8880ba1078ff R11: 0000000000074071 R12: ffffffff8b3979f8 R13: ffffffff8b3979d8 R14: ffffffff8b3979e8 R15: dffffc0000000000 orc_find arch/x86/kernel/unwind_orc.c:159 [inline] orc_find arch/x86/kernel/unwind_orc.c:159 [inline] arch/x86/kernel/unwind_orc.c:422 unwind_next_frame+0x339/0x1400 arch/x86/kernel/unwind_orc.c:422 arch/x86/kernel/unwind_orc.c:422 __save_stack_trace+0x9f/0x190 arch/x86/kernel/stacktrace.c:44 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] save_stack mm/kasan/kasan.c:448 [inline] mm/kasan/kasan.c:553 set_track mm/kasan/kasan.c:460 [inline] mm/kasan/kasan.c:553 kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553 mm/kasan/kasan.c:553 __do_kmalloc_node mm/slab.c:3689 [inline] __do_kmalloc_node mm/slab.c:3689 [inline] mm/slab.c:3703 __kmalloc_node_track_caller+0x4c/0x70 mm/slab.c:3703 mm/slab.c:3703 __kmalloc_reserve net/core/skbuff.c:137 [inline] __kmalloc_reserve net/core/skbuff.c:137 [inline] net/core/skbuff.c:205 __alloc_skb+0xae/0x560 net/core/skbuff.c:205 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:995 [inline] alloc_skb include/linux/skbuff.h:995 [inline] net/ipv6/ndisc.c:403 ndisc_alloc_skb+0x134/0x320 net/ipv6/ndisc.c:403 net/ipv6/ndisc.c:403 ndisc_send_rs+0x33a/0x690 net/ipv6/ndisc.c:669 net/ipv6/ndisc.c:669 addrconf_rs_timer+0x384/0x6a0 net/ipv6/addrconf.c:3835 net/ipv6/addrconf.c:3835 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] __run_timers kernel/time/timer.c:1696 [inline] kernel/time/timer.c:1709 run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] invoke_softirq kernel/softirq.c:372 [inline] kernel/softirq.c:412 irq_exit+0x215/0x260 kernel/softirq.c:412 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] exiting_irq arch/x86/include/asm/apic.h:536 [inline] arch/x86/kernel/apic/apic.c:1098 smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 arch/x86/entry/entry_64.S:894 RIP: 0010:find_inode_bit+0x3bc/0x520 fs/ext4/ialloc.c:725 fs/ext4/ialloc.c:725 Code: 89 f8 31 ff 29 d8 29 d0 89 c3 89 c6 e8 0d f3 85 ff 85 db 79 b7 e8 94 f1 85 ff 4c 89 f7 e8 ec db d3 ff 48 8b 44 24 08 80 38 00 <75> 74 49 8b 45 00 4c 8d 70 01 48 8b 04 24 4d 89 75 00 48 c1 e8 03 RSP: 0018:ffff8880765df648 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffffed100ecbbf01 RBX: 00000000ffffffa6 RCX: ffffffff81b07054 RDX: 0000000000000000 RSI: ffffffff81dc93e4 RDI: ffff88808a0e2a38 RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffed101141c547 R10: ffff88808a0e2a3b R11: 0000000000000000 R12: ffff8880a3dba880 R13: ffff8880765df808 R14: ffff88808a0e29d8 R15: 0000000061bd60ac __ext4_new_inode+0x2e14/0x5a20 fs/ext4/ialloc.c:951 fs/ext4/ialloc.c:951 ext4_create+0x29e/0x5f0 fs/ext4/namei.c:2517 fs/ext4/namei.c:2517 lookup_open+0x893/0x1a20 fs/namei.c:3235 fs/namei.c:3235 do_last fs/namei.c:3327 [inline] do_last fs/namei.c:3327 [inline] fs/namei.c:3537 path_openat+0x1094/0x2df0 fs/namei.c:3537 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f9a9ad93e99 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:00007f9a9a4a6168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f9a9aea71d0 RCX: 00007f9a9ad93e99 RDX: 00000000000026e1 RSI: 0000000020000280 RDI: ffffffffffffff9c RBP: 00007f9a9adedff1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe76665b0f R14: 00007f9a9a4a6300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: eb c6 jmp 0xffffffc8 2: 45 01 01 add %r8d,(%r9) 5: 41 bc 00 80 00 00 mov $0x8000,%r12d b: 48 c1 e9 03 shr $0x3,%rcx f: 83 e3 07 and $0x7,%ebx 12: 41 be 01 00 00 00 mov $0x1,%r14d 18: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1f: fc ff df 22: 4c 8d 2c 01 lea (%rcx,%rax,1),%r13 26: eb 0c jmp 0x34 28: f3 90 pause * 2a: 41 83 ec 01 sub $0x1,%r12d <-- trapping instruction 2e: 0f 84 38 04 00 00 je 0x46c 34: 41 0f b6 45 00 movzbl 0x0(%r13),%eax 39: 38 d8 cmp %bl,%al 3b: 7f 08 jg 0x45 3d: 84 c0 test %al,%al 3f: 0f .byte 0xf ---------------- Code disassembly (best guess): 0: eb c6 jmp 0xffffffc8 2: 45 01 01 add %r8d,(%r9) 5: 41 bc 00 80 00 00 mov $0x8000,%r12d b: 48 c1 e9 03 shr $0x3,%rcx f: 83 e3 07 and $0x7,%ebx 12: 41 be 01 00 00 00 mov $0x1,%r14d 18: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1f: fc ff df 22: 4c 8d 2c 01 lea (%rcx,%rax,1),%r13 26: eb 0c jmp 0x34 28: f3 90 pause * 2a: 41 83 ec 01 sub $0x1,%r12d <-- trapping instruction 2e: 0f 84 38 04 00 00 je 0x46c 34: 41 0f b6 45 00 movzbl 0x0(%r13),%eax 39: 38 d8 cmp %bl,%al 3b: 7f 08 jg 0x45 3d: 84 c0 test %al,%al 3f: 0f .byte 0xf