audit: type=1326 audit(1730182110.940:18): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4052 comm="syz-executor.7" exe="/syz-executor.7" sig=0 arch=c000003e syscall=18 compat=0 ip=0x7fe9f7409ab7 code=0x7ffc0000 audit: type=1326 audit(1730182110.940:19): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4052 comm="syz-executor.7" exe="/syz-executor.7" sig=0 arch=c000003e syscall=18 compat=0 ip=0x7fe9f7409ab7 code=0x7ffc0000 watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.3:4065] Modules linked in: irq event stamp: 6481991 hardirqs last enabled at (6481990): [<ffffffff84000d02>] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (6481991): [<ffffffff83e6275b>] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (6434906): [<ffffffff84001092>] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (6434909): [<ffffffff84001092>] asm_call_irq_on_stack+0x12/0x20 CPU: 1 PID: 4065 Comm: syz-executor.3 Not tainted 5.10.228 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:unwind_get_return_address arch/x86/kernel/unwind_orc.c:323 [inline] RIP: 0010:unwind_get_return_address+0x6e/0xa0 arch/x86/kernel/unwind_orc.c:318 Code: ea 03 80 3c 02 00 75 36 48 8b 7b 48 e8 6b 68 0b 00 85 c0 74 cf 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 80 3c 02 00 <75> 1c 48 8b 43 48 5b 5d e9 b5 cf 0f 03 e8 00 43 5c 00 eb a0 48 89 RSP: 0018:ffff88806cf09928 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffff88806cf09940 RCX: ffffffff8596c801 RDX: 1ffff1100d9e1331 RSI: 0000000000000001 RDI: ffffffff81158764 RBP: ffff88806cf09988 R08: 0000000000000007 R09: ffff8880454ef558 R10: 0000000000032042 R11: 1ffff1100d9e1315 R12: ffff88806cf099f8 R13: 0000000000000000 R14: ffff888047153480 R15: ffff8880482ca000 FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcd7903af8 CR3: 000000000d486000 CR4: 0000000000350ee0 Call Trace: <IRQ> arch_stack_walk+0x99/0xf0 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 __save_stack_trace mm/kmemleak.c:563 [inline] create_object.isra.0+0x372/0xa20 mm/kmemleak.c:618 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] __kmalloc_node_track_caller+0x1a6/0x3b0 mm/slub.c:4496 __kmalloc_reserve net/core/skbuff.c:143 [inline] __alloc_skb+0xb1/0x5b0 net/core/skbuff.c:211 __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 </IRQ> __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:instrument_atomic_read_write include/linux/instrumented.h:101 [inline] RIP: 0010:atomic_dec_and_test include/asm-generic/atomic-instrumented.h:748 [inline] RIP: 0010:page_ref_dec_and_test include/linux/page_ref.h:148 [inline] RIP: 0010:put_page_testzero include/linux/mm.h:708 [inline] RIP: 0010:release_pages+0x150/0xc20 mm/swap.c:914 Code: 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 56 09 00 00 41 8b 5f 34 31 ff 89 de e8 1d c9 e9 ff 85 db 0f 84 50 07 00 00 e8 c0 cf e9 ff <be> 04 00 00 00 4c 89 e7 e8 53 9e 15 00 f0 41 ff 0c 24 41 0f 94 c4 RSP: 0018:ffff8880454ef630 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000004 RCX: ffffffff8156eeb3 RDX: ffff888047153480 RSI: ffffffff8156eec0 RDI: 0000000000000005 RBP: 0000000000000072 R08: 0000000000000000 R09: ffffea0001133537 R10: 0000000000000000 R11: 0000000000000001 R12: ffffea0001133534 R13: dffffc0000000000 R14: ffff8880458f33a8 R15: ffffea0001133500 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline] tlb_flush_mmu_free mm/mmu_gather.c:240 [inline] tlb_flush_mmu+0xe9/0x6e0 mm/mmu_gather.c:247 zap_pte_range mm/memory.c:1355 [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+0x17d9/0x1fe0 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: 0033:0x7fe6406e0b19 Code: Unable to access opcode bytes at RIP 0x7fe6406e0aef. RSP: 002b:00007fe63dc56218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007fe6407f3f68 RCX: 00007fe6406e0b19 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fe6407f3f68 RBP: 00007fe6407f3f60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe6407f3f6c R13: 00007ffc91df915f R14: 00007fe63dc56300 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), 1 bytes skipped: 0: 03 80 3c 02 00 75 add 0x7500023c(%rax),%eax 6: 36 48 8b 7b 48 mov %ss:0x48(%rbx),%rdi b: e8 6b 68 0b 00 callq 0xb687b 10: 85 c0 test %eax,%eax 12: 74 cf je 0xffffffe3 14: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1b: fc ff df 1e: 48 89 ea mov %rbp,%rdx 21: 48 c1 ea 03 shr $0x3,%rdx 25: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) * 29: 75 1c jne 0x47 <-- trapping instruction 2b: 48 8b 43 48 mov 0x48(%rbx),%rax 2f: 5b pop %rbx 30: 5d pop %rbp 31: e9 b5 cf 0f 03 jmpq 0x30fcfeb 36: e8 00 43 5c 00 callq 0x5c433b 3b: eb a0 jmp 0xffffffdd 3d: 48 rex.W 3e: 89 .byte 0x89