audit: type=1326 audit(1732268986.856:117): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4440 comm="syz-executor.2" exe="/syz-executor.2" sig=0 arch=c000003e syscall=18 compat=0 ip=0x7f211e699ab7 code=0x7ffc0000 audit: type=1326 audit(1732268986.969:118): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4440 comm="syz-executor.2" exe="/syz-executor.2" sig=0 arch=c000003e syscall=18 compat=0 ip=0x7f211e699ab7 code=0x7ffc0000 watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.7:4439] Modules linked in: irq event stamp: 12527615 hardirqs last enabled at (12527614): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (12527615): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (12506684): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (12506687): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 4439 Comm: syz-executor.7 Not tainted 5.10.229 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__read_once_word_nocheck+0x3/0x10 include/asm-generic/rwonce.h:68 Code: 0a fe ff ff e8 4e 49 5c 00 e9 bf fd ff ff e8 44 49 5c 00 e9 8c fd ff ff e8 3a 49 5c 00 e9 44 fd ff ff cc cc cc cc cc 48 8b 07 88 d4 0f 03 0f 1f 84 00 00 00 00 00 41 57 89 d0 41 56 41 55 41 RSP: 0018:ffff88806ce09598 EFLAGS: 00000283 RAX: ffffffff8113445a RBX: ffff88806ce096f0 RCX: ffff88806ce096f0 RDX: dffffc0000000000 RSI: ffff888046e3fb28 RDI: ffff888046e3fb28 RBP: ffff888046e3fb28 R08: ffffffff85a07c3d R09: ffff888046e3fb30 R10: 0000000000032042 R11: 1ffff1100d9c12c2 R12: ffff88806ce096a8 R13: ffff888046e38000 R14: 1ffff1100d9c12c2 R15: ffffffff85a07c3c FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe2f809d344 CR3: 000000000e364000 CR4: 0000000000350ef0 Call Trace: deref_stack_reg+0xf2/0x160 arch/x86/kernel/unwind_orc.c:360 unwind_next_frame+0xbf8/0x1a90 arch/x86/kernel/unwind_orc.c:536 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:find_stack lib/stackdepot.c:185 [inline] RIP: 0010:stack_depot_save+0x10b/0x400 lib/stackdepot.c:257 Code: df 41 81 e7 ff ff 0f 00 4a 8b 2c fd 80 44 1d 87 48 85 ed 75 12 e9 b4 00 00 00 48 8b 6d 00 48 85 ed 0f 84 a7 00 00 00 39 5d 08 <75> ee 44 3b 6d 0c 75 e8 31 c0 48 8b 74 c5 18 49 39 34 c4 75 db 48 RSP: 0018:ffff888046e3f570 EFLAGS: 00000246 RAX: 00000000fa66d77d RBX: 00000000090ef921 RCX: 0000000000000800 RDX: 000000005a2ad646 RSI: 0000000000000003 RDI: 00000000590df118 RBP: ffff888046a7f1f0 R08: 00000000a54216c7 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffff888046e3f5c0 R13: 0000000000000012 R14: 0000000000000012 R15: 00000000000ef921 kasan_save_stack+0x32/0x40 mm/kasan/common.c:50 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] 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: 0033:0x7ff9c67c9c27 Code: Unable to access opcode bytes at RIP 0x7ff9c67c9bfd. RSP: 002b:00007ff9c3d3ffa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007ff9c67c9c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000000020000180 RBP: 00007ff9c3d40040 R08: 0000000000000000 R09: 0000000000100000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000020000180 R14: 00007ff9c3d40000 R15: 0000000000000000 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:706 ---------------- Code disassembly (best guess), 4 bytes skipped: 0: e8 4e 49 5c 00 callq 0x5c4953 5: e9 bf fd ff ff jmpq 0xfffffdc9 a: e8 44 49 5c 00 callq 0x5c4953 f: e9 8c fd ff ff jmpq 0xfffffda0 14: e8 3a 49 5c 00 callq 0x5c4953 19: e9 44 fd ff ff jmpq 0xfffffd62 1e: cc int3 1f: cc int3 20: cc int3 21: cc int3 22: cc int3 23: 48 8b 07 mov (%rdi),%rax * 26: e9 88 d4 0f 03 jmpq 0x30fd4b3 <-- trapping instruction 2b: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) 32: 00 33: 41 57 push %r15 35: 89 d0 mov %edx,%eax 37: 41 56 push %r14 39: 41 55 push %r13 3b: 41 rex.B