netlink: 24 bytes leftover after parsing attributes in process `syz-executor.2'. watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.4:25851] Modules linked in: irq event stamp: 4379647 hardirqs last enabled at (4379646): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (4379647): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (3862218): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (3862221): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (3862221): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 25851 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:45 [inline] RIP: 0010:unwind_next_frame+0xed2/0x1400 arch/x86/kernel/unwind_orc.c:572 Code: fa 48 c1 ea 03 80 3c 02 00 0f 85 ea 02 00 00 49 39 ec 49 8b 46 10 77 24 48 39 e8 76 1f 48 8d 55 08 48 39 d0 0f 93 c1 49 39 d4 <0f> 92 c0 84 c1 74 0b 48 3b 6c 24 18 0f 86 5f 01 00 00 bf 01 00 00 RSP: 0018:ffff8880ba007760 EFLAGS: 00000287 ORIG_RAX: ffffffffffffff13 RAX: ffff8880ba008000 RBX: 1ffff11017400ef5 RCX: 0000000000000001 RDX: ffff8880ba007fd0 RSI: ffff8880ba0076f0 RDI: ffff8880ba0078a0 RBP: ffff8880ba007fc8 R08: 0000000000000001 R09: 0000000000000001 R10: ffff8880ba0078ef R11: 0000000000074071 R12: ffff8880ba000000 R13: ffff8880ba0078c5 R14: ffff8880ba007890 R15: ffffffff8b912364 FS: 00007fa0395b7700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c0186b1000 CR3: 00000000b4eba000 CR4: 00000000003426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 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 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 __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:preempt_schedule_irq+0xa6/0x140 kernel/sched/core.c:3744 Code: 00 00 e8 3d 04 29 f9 e8 58 3f 4f f9 4c 89 e8 48 c1 e8 03 80 3c 18 00 75 69 48 83 3d 9b 18 d9 01 00 74 5b fb 66 0f 1f 44 00 00 01 00 00 00 e8 40 d1 ff ff 48 c7 c0 90 82 f1 89 48 c1 e8 03 80 RSP: 0018:ffff888221ea7740 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3053 RBX: dffffc0000000000 RCX: 1ffff11007bea5a5 RDX: 0000000000000000 RSI: ffff88803df52d08 RDI: ffff88803df52d04 RBP: ffffed1007bea490 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88803df52480 R13: ffffffff89f18298 R14: 0000000000000000 R15: 0000000000000000 retint_kernel+0x1b/0x2d RIP: 0010:unwind_next_frame+0xef5/0x1400 arch/x86/kernel/unwind_orc.c:579 Code: d0 0f 93 c1 49 39 d4 0f 92 c0 84 c1 74 0b 48 3b 6c 24 18 0f 86 5f 01 00 00 bf 01 00 00 00 e8 f2 dc 17 00 65 8b 15 6b 4f d8 7e <85> d2 b8 01 00 00 00 0f 85 90 f1 ff ff e8 23 ad d6 ff e9 86 f1 ff RSP: 0018:ffff888221ea7810 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff13 RAX: 0000000080000001 RBX: 1ffff110443d4f0b RCX: 0000000000000000 RDX: 0000000080000000 RSI: ffff888221ea77a0 RDI: 0000000000000001 RBP: ffff888221ea7e08 R08: 0000000000000001 R09: 0000000000000001 R10: ffff888221ea799f R11: 0000000000074071 R12: ffff888221ea0000 R13: ffff888221ea7975 R14: ffff888221ea7940 R15: ffffffff8b91e9be __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 wlan1: No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge) slab_post_alloc_hook mm/slab.h:445 [inline] slab_alloc mm/slab.c:3397 [inline] kmem_cache_alloc_trace+0x11a/0x380 mm/slab.c:3623 kmalloc include/linux/slab.h:515 [inline] tc_action_net_init include/net/act_api.h:117 [inline] vlan_init_net+0x18b/0x490 net/sched/act_vlan.c:327 ops_init+0xb3/0x410 net/core/net_namespace.c:129 setup_net+0x2c2/0x720 net/core/net_namespace.c:316 copy_net_ns+0x1f7/0x340 net/core/net_namespace.c:439 create_new_namespaces+0x3f6/0x7b0 kernel/nsproxy.c:107 unshare_nsproxy_namespaces+0xbd/0x1f0 kernel/nsproxy.c:206 ksys_unshare+0x36c/0x9a0 kernel/fork.c:2542 __do_sys_unshare kernel/fork.c:2610 [inline] __se_sys_unshare kernel/fork.c:2608 [inline] __x64_sys_unshare+0x2d/0x40 kernel/fork.c:2608 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fa03c041a39 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:00007fa0395b7188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007fa03c144f60 RCX: 00007fa03c041a39 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 00007fa03c09be8f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff0dbff23f R14: 00007fa0395b7300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 12889 Comm: kworker/u4:3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: phy17 ieee80211_iface_work RIP: 0010:lockdep_hardirqs_on+0x14a/0x5c0 kernel/locking/lockdep.c:2873 Code: e8 03 80 3c 10 00 0f 85 48 04 00 00 48 83 3d ec 2a a6 08 00 0f 84 60 03 00 00 9c 58 0f 1f 44 00 00 f6 c4 02 0f 85 b5 03 00 00 <48> b8 00 00 00 00 00 fc ff df 48 89 da 83 e3 07 48 c1 ea 03 83 c3 RSP: 0018:ffff888227d6f750 EFLAGS: 00000046 RAX: 0000000000000086 RBX: ffffffff8d243760 RCX: 1ffffffff148be2c RDX: dffffc0000000000 RSI: ffffffff8167a995 RDI: ffff888227d64d90 RBP: ffffffff88195174 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888227d64540 R13: ffff888227d64540 R14: ffff888227d68000 R15: ffff8880ba12b0c0 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f75c5625000 CR3: 00000000af9a7000 CR4: 00000000003426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] _raw_spin_unlock_irq+0x24/0x80 kernel/locking/spinlock.c:192 rq_unlock_irq kernel/sched/sched.h:1851 [inline] __schedule+0x15a9/0x2040 kernel/sched/core.c:3520 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 yield+0xa2/0xd0 kernel/sched/core.c:5066 tasklet_kill+0x3f/0xc0 kernel/softirq.c:566 tasklet_hrtimer_cancel include/linux/interrupt.h:648 [inline] mac80211_hwsim_bss_info_changed+0xc14/0xf20 drivers/net/wireless/mac80211_hwsim.c:1793 drv_bss_info_changed net/mac80211/driver-ops.h:178 [inline] ieee80211_bss_info_change_notify+0x311/0x920 net/mac80211/main.c:204 ieee80211_offchannel_stop_vifs+0x2af/0x560 net/mac80211/offchannel.c:143 ieee80211_start_sw_scan net/mac80211/scan.c:488 [inline] __ieee80211_start_scan+0x12d5/0x25e0 net/mac80211/scan.c:729 ieee80211_request_ibss_scan+0x3ea/0x840 net/mac80211/scan.c:1103 ieee80211_sta_merge_ibss net/mac80211/ibss.c:1313 [inline] ieee80211_ibss_work.cold+0x179/0x67a net/mac80211/ibss.c:1703 ieee80211_iface_work+0x7ba/0x8a0 net/mac80211/iface.c:1362 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 ---------------- Code disassembly (best guess): 0: fa cli 1: 48 c1 ea 03 shr $0x3,%rdx 5: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 9: 0f 85 ea 02 00 00 jne 0x2f9 f: 49 39 ec cmp %rbp,%r12 12: 49 8b 46 10 mov 0x10(%r14),%rax 16: 77 24 ja 0x3c 18: 48 39 e8 cmp %rbp,%rax 1b: 76 1f jbe 0x3c 1d: 48 8d 55 08 lea 0x8(%rbp),%rdx 21: 48 39 d0 cmp %rdx,%rax 24: 0f 93 c1 setae %cl 27: 49 39 d4 cmp %rdx,%r12 * 2a: 0f 92 c0 setb %al <-- trapping instruction 2d: 84 c1 test %al,%cl 2f: 74 0b je 0x3c 31: 48 3b 6c 24 18 cmp 0x18(%rsp),%rbp 36: 0f 86 5f 01 00 00 jbe 0x19b 3c: bf .byte 0xbf 3d: 01 00 add %eax,(%rax)