audit: type=1400 audit(1732009750.986:13): avc: denied { associate } for pid=4173 comm="syz-executor.5" name="tty31" dev="devtmpfs" ino=51 scontext=system_u:object_r:apt_exec_t:s0 tcontext=system_u:object_r:device_t:s0 tclass=filesystem permissive=1 watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [syz-executor.1:4183] Modules linked in: irq event stamp: 4803379 hardirqs last enabled at (4803378): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (4803379): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (4779302): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (4779305): [] asm_call_irq_on_stack+0x12/0x20 CPU: 1 PID: 4183 Comm: syz-executor.1 Not tainted 5.10.229 #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:ffff88806cf09668 EFLAGS: 00000216 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff85d4485c RDX: 1ffffffff0ba890c RSI: ffffffff85d4485c RDI: ffffffff85944588 RBP: ffff88806cf09775 R08: ffffffff85d4485c R09: ffffffff85d44922 R10: 0000000000032042 R11: 1ffff1100d9e12d5 R12: ffff88806cf09788 R13: ffff88806cf09740 R14: 1ffff1100d9e12d5 R15: ffffffff85d44860 FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe0d3bb0590 CR3: 000000000ceea000 CR4: 0000000000350ee0 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] kmem_cache_alloc_node+0x14b/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:__unlock_page_memcg mm/memcontrol.c:2178 [inline] RIP: 0010:unlock_page_memcg+0x57/0x170 mm/memcontrol.c:2198 Code: 48 b8 00 00 00 00 00 fc ff df 48 0f 45 da 48 8d 7b 38 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 f8 00 00 00 48 8b 5b 38 48 85 db <74> 34 48 8d bb 08 0b 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa RSP: 0018:ffff8880471d7750 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff8164406c RDX: 1ffffd40001f8aff RSI: ffffffff81643dae RDI: ffffea0000fc57f8 RBP: ffffea0000fc57c0 R08: 0000000000000001 R09: ffffea0000fc57f3 R10: 0000000000000000 R11: 0000000000000001 R12: ffffea0000fc57c8 R13: ffff88800e680ff8 R14: dffffc0000000000 R15: 00007f5790400000 zap_pte_range mm/memory.c:1287 [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+0x110f/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:3235 __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: 0033:0x7f5791ecdb19 Code: Unable to access opcode bytes at RIP 0x7f5791ecdaef. RSP: 002b:00007f578f443188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: 0000000000000004 RBX: 00007f5791fe0f60 RCX: 00007f5791ecdb19 RDX: 0000000000000000 RSI: 0000000020000080 RDI: ffffffffffffff9c RBP: 00007f5791f27f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe25a8e9ff R14: 00007f578f443300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline] NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline] NMI backtrace for cpu 0 skipped: idling at default_idle+0xe/0x20 arch/x86/kernel/process.c:706 ---------------- 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