netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'. syz-executor.5 (4018) used greatest stack depth: 23536 bytes left syz-executor.3 (3982) used greatest stack depth: 23472 bytes left watchdog: BUG: soft lockup - CPU#0 stuck for 21s! [syz-executor.6:4002] Modules linked in: irq event stamp: 14707145 hardirqs last enabled at (14707144): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (14707145): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (14681382): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (14681385): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 4002 Comm: syz-executor.6 Not tainted 5.10.230 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:unwind_next_frame+0x30b/0x1a90 arch/x86/kernel/unwind_orc.c:461 Code: 85 49 12 00 00 41 c6 45 34 01 48 c7 c1 60 8d eb 84 48 b8 00 00 00 00 00 fc ff df 4c 8d 79 04 4c 89 fa 48 c1 ea 03 0f b6 04 02 <4c> 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 b9 07 00 00 0f b6 41 04 RSP: 0018:ffff88806ce095d0 EFLAGS: 00000213 RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffffffff859ba0f8 RDX: 1ffffffff0b3741f RSI: ffffffff859ba0e6 RDI: ffffffff856e8084 RBP: ffff88806ce096dd R08: ffffffff859ba0e6 R09: ffffffff859ba164 R10: 0000000000032042 R11: 1ffff1100d9c12c2 R12: ffff88806ce096f0 R13: ffff88806ce096a8 R14: 1ffff1100d9c12c2 R15: ffffffff859ba0fc FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd4157a0998 CR3: 0000000009760000 CR4: 0000000000350ef0 Call Trace: arch_stack_walk+0x83/0xf0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc.constprop.0+0xc9/0xd0 mm/kasan/common.c:461 slab_post_alloc_hook mm/slab.h:532 [inline] slab_alloc_node mm/slub.c:2896 [inline] slab_alloc mm/slub.c:2904 [inline] kmem_cache_alloc+0x13b/0x310 mm/slub.c:2909 mem_pool_alloc mm/kmemleak.c:423 [inline] create_object.isra.0+0x3a/0xa20 mm/kmemleak.c:578 kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] slab_post_alloc_hook mm/slab.h:534 [inline] slab_alloc_node mm/slub.c:2896 [inline] kmem_cache_alloc_node+0x169/0x330 mm/slub.c:2932 __alloc_skb+0x6d/0x5b0 net/core/skbuff.c:199 __netdev_alloc_skb+0x6e/0x360 net/core/skbuff.c:447 netdev_alloc_skb include/linux/skbuff.h:2854 [inline] dev_alloc_skb include/linux/skbuff.h:2867 [inline] __ieee80211_beacon_get+0x3af/0x1440 net/mac80211/tx.c:4876 ieee80211_beacon_get_tim+0x88/0x9f0 net/mac80211/tx.c:4990 ieee80211_beacon_get include/net/mac80211.h:4912 [inline] mac80211_hwsim_beacon_tx+0x111/0x940 drivers/net/wireless/mac80211_hwsim.c:1740 __iterate_interfaces+0x1f0/0x550 net/mac80211/util.c:792 ieee80211_iterate_active_interfaces_atomic+0x71/0x1c0 net/mac80211/util.c:828 mac80211_hwsim_beacon+0xd1/0x1d0 drivers/net/wireless/mac80211_hwsim.c:1793 __run_hrtimer kernel/time/hrtimer.c:1586 [inline] __hrtimer_run_queues+0x632/0xb40 kernel/time/hrtimer.c:1650 hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1667 __do_softirq+0x1b8/0x7c9 kernel/softirq.c:298 asm_call_irq_on_stack+0x12/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x80/0xa0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x114/0x1b0 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x43/0xa0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:call_rcu+0x2bd/0x9c0 kernel/rcu/tree.c:3051 Code: 85 ab 05 00 00 8b 85 28 01 00 00 65 ff 0d 8b cd d3 7e a8 02 0f 84 8d 01 00 00 48 83 7c 24 08 00 0f 85 f0 00 00 00 ff 34 24 9d <48> 83 c4 28 5b 5d 41 5c 41 5d 41 5e 41 5f e9 e0 9d f1 02 4c 89 c7 RSP: 0018:ffff8880477277b8 EFLAGS: 00000246 RAX: 0000000000dc7681 RBX: ffff88801dc01670 RCX: 1ffffffff0ace879 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff812ea345 RBP: ffff88806ce3c0f0 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000708 R13: ffff88806ce3c000 R14: ffff88806ce3c0e0 R15: ffff88806ce3c098 kmemleak_free_recursive include/linux/kmemleak.h:49 [inline] slab_free_hook mm/slub.c:1517 [inline] slab_free_freelist_hook+0x13e/0x180 mm/slub.c:1576 slab_free mm/slub.c:3149 [inline] kmem_cache_free+0xa7/0x2d0 mm/slub.c:3165 pgtable_pte_page_dtor include/linux/mm.h:2232 [inline] ___pte_free_tlb+0x19/0xb0 arch/x86/mm/pgtable.c:55 __pte_free_tlb arch/x86/include/asm/pgalloc.h:61 [inline] free_pte_range mm/memory.c:220 [inline] free_pmd_range mm/memory.c:238 [inline] free_pud_range mm/memory.c:272 [inline] free_p4d_range mm/memory.c:306 [inline] free_pgd_range+0x747/0x1380 mm/memory.c:386 free_pgtables+0x230/0x2f0 mm/memory.c:418 exit_mmap+0x28e/0x4f0 mm/mmap.c:3236 __mmput kernel/fork.c:1101 [inline] mmput+0xca/0x340 kernel/fork.c:1122 exit_mm kernel/exit.c:536 [inline] do_exit+0xa96/0x2600 kernel/exit.c:847 do_group_exit+0x125/0x310 kernel/exit.c:982 get_signal+0x4bc/0x2350 kernel/signal.c:2762 arch_do_signal_or_restart+0x2b7/0x1990 arch/x86/kernel/signal.c:805 handle_signal_work kernel/entry/common.c:145 [inline] exit_to_user_mode_loop kernel/entry/common.c:169 [inline] exit_to_user_mode_prepare+0x10f/0x190 kernel/entry/common.c:199 syscall_exit_to_user_mode+0x38/0x1d0 kernel/entry/common.c:274 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7fae0079ab19 Code: Unable to access opcode bytes at RIP 0x7fae0079aaef. RSP: 002b:00007fadfdcce188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: fffffffffffffff4 RBX: 00007fae008ae0e0 RCX: 00007fae0079ab19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020000440 RBP: 00007fae007f4f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe3c4763ef R14: 00007fadfdcce300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 261 Comm: syz-fuzzer Not tainted 5.10.230 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:lock_acquire+0x1b9/0x470 kernel/locking/lockdep.c:5534 Code: 2b db 7e e8 39 91 ff ff b8 ff ff ff ff 48 83 c4 20 65 0f c1 05 b8 2b db 7e 83 f8 01 4c 8b 54 24 08 0f 85 48 02 00 00 41 52 9d <48> b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00 00 00 00 48 c7 RSP: 0018:ffff88800e52f8c0 EFLAGS: 00000046 RAX: 0000000000000001 RBX: 1ffff11001ca5f1a RCX: 000000008a66c5f4 RDX: 1ffff11001707b00 RSI: 8a980ee05ec18257 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8686a6e7 R10: 0000000000000046 R11: 0000000000000001 R12: 0000000000000002 R13: 0000000000000000 R14: ffffffff84ff9960 R15: 0000000000000000 FS: 000000c000030e90(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fddb995b000 CR3: 0000000018178000 CR4: 0000000000350ee0 Call Trace: rcu_lock_acquire include/linux/rcupdate.h:303 [inline] rcu_read_lock include/linux/rcupdate.h:717 [inline] select_task_rq_fair+0x248/0x2ee0 kernel/sched/fair.c:6959 select_task_rq kernel/sched/core.c:2367 [inline] try_to_wake_up+0x34c/0x1290 kernel/sched/core.c:2982 wake_up_process kernel/sched/core.c:3066 [inline] wake_up_q+0x9e/0x110 kernel/sched/core.c:596 futex_wake+0x3f0/0x490 kernel/futex/core.c:1641 do_futex+0xfb8/0x1a60 kernel/futex/core.c:3758 __do_sys_futex+0x2bb/0x480 kernel/futex/core.c:3816 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x466533 Code: 24 20 c3 cc cc cc cc 48 8b 7c 24 08 8b 74 24 10 8b 54 24 14 4c 8b 54 24 18 4c 8b 44 24 20 44 8b 4c 24 28 b8 ca 00 00 00 0f 05 <89> 44 24 30 c3 cc cc cc cc cc cc cc cc 8b 7c 24 08 48 8b 74 24 10 RSP: 002b:000000c0005f3cc0 EFLAGS: 00000202 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000466533 RDX: 0000000000000001 RSI: 0000000000000081 RDI: 0000000001f20100 RBP: 000000c0005f3d10 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 000000312713404d R13: 0000000000000001 R14: 000000312713404d R15: ffffffffffffffff Bluetooth: hci0: command 0x0406 tx timeout Bluetooth: hci1: command 0x0406 tx timeout Bluetooth: hci5: command 0x0406 tx timeout Bluetooth: hci4: command 0x0406 tx timeout Bluetooth: hci7: command 0x0406 tx timeout Bluetooth: hci2: command 0x0406 tx timeout Bluetooth: hci3: command 0x0406 tx timeout Bluetooth: hci6: command 0x0406 tx timeout ---------------- Code disassembly (best guess): 0: 85 49 12 test %ecx,0x12(%rcx) 3: 00 00 add %al,(%rax) 5: 41 c6 45 34 01 movb $0x1,0x34(%r13) a: 48 c7 c1 60 8d eb 84 mov $0xffffffff84eb8d60,%rcx 11: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 18: fc ff df 1b: 4c 8d 79 04 lea 0x4(%rcx),%r15 1f: 4c 89 fa mov %r15,%rdx 22: 48 c1 ea 03 shr $0x3,%rdx 26: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax * 2a: 4c 89 fa mov %r15,%rdx <-- trapping instruction 2d: 83 e2 07 and $0x7,%edx 30: 38 d0 cmp %dl,%al 32: 7f 08 jg 0x3c 34: 84 c0 test %al,%al 36: 0f 85 b9 07 00 00 jne 0x7f5 3c: 0f b6 41 04 movzbl 0x4(%rcx),%eax