audit: type=1400 audit(1747221962.031:10): avc: denied { create } for pid=3952 comm="syz-executor.6" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=dccp_socket permissive=1 netlink: 'syz-executor.1': attribute type 4 has an invalid length. loop1: detected capacity change from 0 to 512 watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor.1:3931] Modules linked in: irq event stamp: 7445395 hardirqs last enabled at (7445394): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (7445395): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (7432092): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (7432095): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 3931 Comm: syz-executor.1 Not tainted 5.10.237 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__orc_find+0x4a/0xf0 arch/x86/kernel/unwind_orc.c:50 Code: 4c 39 e7 0f 87 a2 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:ffff88806ce09718 EFLAGS: 00000202 RAX: ffffffff85946358 RBX: ffffffff8594635c RCX: ffffffff84001091 RDX: 0000000000000000 RSI: ffffffff85d47312 RDI: ffffffff85946338 RBP: ffffffff85946354 R08: ffffffff85d47312 R09: ffffffff85d473ba R10: 0000000000032042 R11: 1ffff1100d9c12f4 R12: ffffffff85946358 R13: ffffffff85946338 R14: ffffffff85946350 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000559c46672df0 CR3: 0000000044006000 CR4: 0000000000350ef0 Call Trace: orc_find arch/x86/kernel/unwind_orc.c:178 [inline] unwind_next_frame+0x2b3/0x1a90 arch/x86/kernel/unwind_orc.c:448 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+0x1c/0x30 mm/kasan/common.c:56 kasan_set_free_info+0x1b/0x30 mm/kasan/generic.c:355 __kasan_slab_free+0x110/0x160 mm/kasan/common.c:422 slab_free_hook mm/slub.c:1542 [inline] slab_free_freelist_hook+0xa9/0x180 mm/slub.c:1576 slab_free mm/slub.c:3149 [inline] kfree+0xd7/0x340 mm/slub.c:4125 skb_free_head net/core/skbuff.c:606 [inline] skb_release_data+0x604/0x820 net/core/skbuff.c:626 skb_release_all net/core/skbuff.c:680 [inline] __kfree_skb net/core/skbuff.c:694 [inline] consume_skb net/core/skbuff.c:850 [inline] consume_skb+0x110/0x2b0 net/core/skbuff.c:844 mac80211_hwsim_tx_frame+0x15a/0x1e0 drivers/net/wireless/mac80211_hwsim.c:1717 mac80211_hwsim_beacon_tx+0x494/0x940 drivers/net/wireless/mac80211_hwsim.c:1770 __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:1588 [inline] __hrtimer_run_queues+0x632/0xb40 kernel/time/hrtimer.c:1652 hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1669 __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:__tlb_remove_page_size+0xbb/0x420 mm/mmu_gather.c:81 Code: 03 0f 8e f0 02 00 00 48 b8 00 00 00 00 00 fc ff df 44 8b 65 08 4a 8d 7c e5 10 45 8d 7c 24 01 48 89 fa 44 89 7d 08 48 c1 ea 03 <80> 3c 02 00 0f 85 e4 02 00 00 48 8d 7d 0c 4e 89 6c e5 10 48 b8 00 RSP: 0018:ffff8880485c7728 EFLAGS: 00000212 RAX: dffffc0000000000 RBX: ffff8880485c7a40 RCX: ffffffff81630e82 RDX: 1ffff1100194058c RSI: ffffffff81630e90 RDI: ffff88800ca02c60 RBP: ffff88800ca02000 R08: 0000000000000000 R09: ffffea0001096ef3 R10: 0000000000000000 R11: 0000000000000001 R12: 000000000000018a R13: ffffea0001096ec0 R14: ffff8880485c7a68 R15: 000000000000018b __tlb_remove_page include/asm-generic/tlb.h:442 [inline] zap_pte_range mm/memory.c:1290 [inline] zap_pmd_range mm/memory.c:1404 [inline] zap_pud_range mm/memory.c:1433 [inline] zap_p4d_range mm/memory.c:1454 [inline] unmap_page_range+0x1186/0x1fe0 mm/memory.c:1475 unmap_single_vma+0x198/0x300 mm/memory.c:1520 unmap_vmas+0x16d/0x300 mm/memory.c:1552 exit_mmap+0x27f/0x4f0 mm/mmap.c:3253 __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: 0033:0x7fadfdd2fb19 Code: Unable to access opcode bytes at RIP 0x7fadfdd2faef. RSP: 002b:00007fadfb2a5188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: 0000000000000008 RBX: 00007fadfde42f60 RCX: 00007fadfdd2fb19 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020001d80 RBP: 00007fadfdd89f6d R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffffa3986cf R14: 00007fadfb2a5300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline] NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline] NMI backtrace for cpu 1 skipped: idling at default_idle+0xe/0x20 arch/x86/kernel/process.c:711 ---------------- Code disassembly (best guess): 0: 4c 39 e7 cmp %r12,%rdi 3: 0f 87 a2 00 00 00 ja 0xab 9: 49 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%r15 10: fc ff df 13: 49 89 fe mov %rdi,%r14 16: 48 89 fd mov %rdi,%rbp 19: eb 0c jmp 0x27 1b: 48 8d 6b 04 lea 0x4(%rbx),%rbp 1f: 49 89 de mov %rbx,%r14 22: 49 39 ec cmp %rbp,%r12 25: 72 4d jb 0x74 27: 4c 89 e0 mov %r12,%rax * 2a: 48 29 e8 sub %rbp,%rax <-- trapping instruction 2d: 48 89 c2 mov %rax,%rdx 30: 48 c1 e8 3f shr $0x3f,%rax 34: 48 c1 fa 02 sar $0x2,%rdx 38: 48 01 d0 add %rdx,%rax 3b: 48 d1 f8 sar %rax 3e: 48 rex.W 3f: 8d .byte 0x8d