netlink: 24 bytes leftover after parsing attributes in process `syz-executor.0'. watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.3:6396] Modules linked in: irq event stamp: 1678721 hardirqs last enabled at (1678720): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (1678721): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (1390): [] rcu_read_unlock_bh include/linux/rcupdate.h:717 [inline] softirqs last enabled at (1390): [] __dev_queue_xmit+0x15f5/0x2e00 net/core/dev.c:3865 softirqs last disabled at (1529): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (1529): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 6396 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:unwind_next_frame+0xe55/0x1400 arch/x86/kernel/unwind_orc.c:572 Code: 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e a0 03 00 00 41 39 2e 0f 85 8f 00 00 00 <48> b8 00 00 00 00 00 fc ff df 48 8b 14 24 48 c1 ea 03 80 3c 02 00 RSP: 0018:ffff8880ba007760 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 1ffff11017400ef5 RCX: 0000000000000000 RDX: 1ffff11017400f12 RSI: ffff8880ba0076f0 RDI: ffff8880ba007e10 RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000000000001 R10: ffff8880ba0078ef R11: 0000000000074071 R12: ffff8880ba007e40 R13: ffff8880ba0078c5 R14: ffff8880ba007890 R15: ffffffff8b93e926 FS: 00007f189f370700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000100 CR3: 000000004c9b6000 CR4: 00000000003406f0 DR0: 00000000000000ff DR1: 0000000000000000 DR2: 0000000000000000 DR3: 4000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __save_stack_trace+0x9f/0x190 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553 kmem_cache_alloc_node_trace+0x151/0x3b0 mm/slab.c:3668 __do_kmalloc_node mm/slab.c:3688 [inline] __kmalloc_node_track_caller+0x38/0x70 mm/slab.c:3703 __kmalloc_reserve net/core/skbuff.c:137 [inline] __alloc_skb+0xae/0x560 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:995 [inline] mrp_pdu_init net/802/mrp.c:316 [inline] mrp_pdu_append_vecattr_event+0x7d2/0x1050 net/802/mrp.c:415 mrp_attr_event+0x15d/0x220 net/802/mrp.c:510 mrp_mad_event net/802/mrp.c:590 [inline] mrp_join_timer+0x5a/0xc0 net/802/mrp.c:607 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:orc_find arch/x86/kernel/unwind_orc.c:149 [inline] RIP: 0010:unwind_next_frame+0x24a/0x1400 arch/x86/kernel/unwind_orc.c:422 Code: 8d 43 ff 39 c6 0f 83 06 0e 00 00 48 b8 00 00 00 00 00 fc ff df 89 f2 48 8d 3c 95 bc 91 17 8c 48 89 f9 48 c1 e9 03 0f b6 0c 01 <48> 89 f8 83 e0 07 83 c0 03 38 c8 7c 27 84 c9 74 23 48 89 54 24 30 RSP: 0018:ffff88804b5c7478 EFLAGS: 00000a02 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff110096b8e98 RCX: 0000000000000000 RDX: 0000000000000077 RSI: 0000000000000077 RDI: ffffffff8c179398 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000001 R10: ffff88804b5c7607 R11: 0000000000074071 R12: ffff88804b5c75f0 R13: ffff88804b5c75dd R14: ffff88804b5c75a8 R15: ffffffff81007718 __save_stack_trace+0x9f/0x190 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553 slab_post_alloc_hook mm/slab.h:445 [inline] slab_alloc_node mm/slab.c:3340 [inline] kmem_cache_alloc_node_trace+0x13c/0x3b0 mm/slab.c:3666 kmalloc_node include/linux/slab.h:553 [inline] kzalloc_node include/linux/slab.h:720 [inline] __get_vm_area_node+0x128/0x3a0 mm/vmalloc.c:1394 __vmalloc_node_range mm/vmalloc.c:1748 [inline] __vmalloc_node mm/vmalloc.c:1804 [inline] __vmalloc_node_flags mm/vmalloc.c:1818 [inline] vmalloc+0xe6/0x1a0 mm/vmalloc.c:1840 netlink_alloc_large_skb net/netlink/af_netlink.c:1202 [inline] netlink_sendmsg+0x48b/0xc50 net/netlink/af_netlink.c:1892 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 sock_no_sendpage+0xf5/0x140 net/core/sock.c:2686 kernel_sendpage net/socket.c:3585 [inline] sock_sendpage+0xdf/0x140 net/socket.c:912 pipe_to_sendpage+0x268/0x330 fs/splice.c:452 splice_from_pipe_feed fs/splice.c:503 [inline] __splice_from_pipe+0x389/0x800 fs/splice.c:627 splice_from_pipe fs/splice.c:662 [inline] generic_splice_sendpage+0xd4/0x140 fs/splice.c:833 do_splice_from fs/splice.c:852 [inline] do_splice fs/splice.c:1154 [inline] __do_sys_splice fs/splice.c:1428 [inline] __se_sys_splice+0xfe7/0x16d0 fs/splice.c:1408 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f18a0a3d0e9 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f189f370168 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 00007f18a0b50100 RCX: 00007f18a0a3d0e9 RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007f18a0a9708d R08: 000000000004ffe6 R09: 0000000000000007 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffa8785d0f R14: 00007f189f370300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 6335 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:__read_once_size include/linux/compiler.h:263 [inline] RIP: 0010:csd_lock_wait kernel/smp.c:108 [inline] RIP: 0010:smp_call_function_single+0x1db/0x420 kernel/smp.c:302 Code: 00 e8 09 04 0a 00 48 8b 4c 24 08 48 8b 54 24 10 48 8d 74 24 40 8b 7c 24 1c e8 a1 f9 ff ff 41 89 c5 eb 07 e8 e7 03 0a 00 f3 90 <44> 8b 64 24 58 31 ff 41 83 e4 01 44 89 e6 e8 42 05 0a 00 45 85 e4 RSP: 0018:ffff88804bb97980 EFLAGS: 00000293 RAX: ffff8880a9610640 RBX: 1ffff11009772f34 RCX: ffffffff8158819e RDX: 0000000000000000 RSI: ffffffff81588189 RDI: 0000000000000005 RBP: ffff88804bb97a60 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000002 FS: 0000555556359400(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2c027000 CR3: 0000000042e56000 CR4: 00000000003406e0 DR0: 00000000000000ff DR1: 0000000000000000 DR2: 0000000000000000 DR3: 4000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: smp_call_function_many+0x743/0x8d0 kernel/smp.c:434 smp_call_function kernel/smp.c:492 [inline] on_each_cpu+0x47/0x240 kernel/smp.c:602 text_poke_bp+0xd7/0x1a0 arch/x86/kernel/alternative.c:818 __jump_label_transform+0x2d6/0x460 arch/x86/kernel/jump_label.c:103 arch_jump_label_transform+0x26/0x40 arch/x86/kernel/jump_label.c:111 __jump_label_update+0x1cf/0x230 kernel/jump_label.c:383 jump_label_update kernel/jump_label.c:768 [inline] jump_label_update+0x177/0x310 kernel/jump_label.c:747 __static_key_slow_dec_cpuslocked+0x23d/0x280 kernel/jump_label.c:212 __static_key_slow_dec kernel/jump_label.c:223 [inline] static_key_slow_dec+0x5b/0x90 kernel/jump_label.c:237 tracepoint_remove_func kernel/tracepoint.c:347 [inline] tracepoint_probe_unregister+0x513/0x860 kernel/tracepoint.c:443 bpf_raw_tracepoint_release+0x82/0xf0 kernel/bpf/syscall.c:1525 __fput+0x2ce/0x890 fs/file_table.c:278 task_work_run+0x148/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7faa2323dd2b Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44 RSP: 002b:00007ffed3bb9da0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007faa2323dd2b RDX: 0000001b2c020000 RSI: 0000001b2c0276f8 RDI: 0000000000000004 RBP: 00007faa2339f960 R08: 0000000000000000 R09: 000000003253460c R10: 0016e48d5b10d555 R11: 0000000000000293 R12: 00000000000c8dc9 R13: 00007ffed3bb9ea0 R14: 00007ffed3bb9ec0 R15: 0000000000000032 ---------------- Code disassembly (best guess): 0: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 7: fc ff df a: 4c 89 f2 mov %r14,%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 a0 03 00 00 jle 0x3c1 21: 41 39 2e cmp %ebp,(%r14) 24: 0f 85 8f 00 00 00 jne 0xb9 * 2a: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax <-- trapping instruction 31: fc ff df 34: 48 8b 14 24 mov (%rsp),%rdx 38: 48 c1 ea 03 shr $0x3,%rdx 3c: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)