netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.1:7225] Modules linked in: irq event stamp: 5657419 hardirqs last enabled at (5657418): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (5657419): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (5639800): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (5639803): [] asm_call_irq_on_stack+0x12/0x20 CPU: 1 PID: 7225 Comm: syz-executor.1 Not tainted 5.10.238 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:169 [inline] RIP: 0010:unwind_next_frame+0x21c/0x1a90 arch/x86/kernel/unwind_orc.c:448 Code: 8d 3c 8d 10 ef d6 85 49 89 f8 49 c1 e8 03 45 0f b6 04 10 48 89 fa 83 e2 07 83 c2 03 44 38 c2 7c 09 45 84 c0 0f 85 67 12 00 00 <44> 8d 46 01 8b 0c 8d 10 ef d6 85 48 ba 00 00 00 00 00 fc ff df 4a RSP: 0018:ffff88806cf09760 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 000000000000159a RDX: 0000000000000003 RSI: 000000000000159a RDI: ffffffff85d74578 RBP: ffff88806cf0986d R08: 0000000000000000 R09: ffff88801a2875d8 R10: 0000000000032042 R11: 1ffff1100d9e12f4 R12: ffff88806cf09880 R13: ffff88806cf09838 R14: 1ffff1100d9e12f4 R15: ffffffff81159a13 FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055b9d16799f8 CR3: 000000003d98e000 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+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:constant_test_bit arch/x86/include/asm/bitops.h:207 [inline] RIP: 0010:test_bit include/asm-generic/bitops/instrumented-non-atomic.h:135 [inline] RIP: 0010:PageSwapBacked include/linux/page-flags.h:357 [inline] RIP: 0010:PageSwapCache include/linux/page-flags.h:402 [inline] RIP: 0010:free_swap_cache mm/swap_state.c:326 [inline] RIP: 0010:free_pages_and_swap_cache+0xd3/0x290 mm/swap_state.c:354 Code: 89 c6 48 89 04 24 e8 9c e0 d8 ff 48 8b 04 24 48 85 c0 0f 85 60 01 00 00 e8 1a e7 d8 ff be 08 00 00 00 4c 89 ff e8 3d c7 04 00 <4c> 89 f8 48 c1 e8 03 42 80 3c 28 00 0f 85 64 01 00 00 4d 8b 3f 31 RSP: 0018:ffff88801a2876b8 EFLAGS: 00000246 RAX: 0000000000000001 RBX: ffff88804d185f88 RCX: ffffffff8167e8c3 RDX: fffff940001b4a59 RSI: 0000000000000008 RDI: ffffea0000da52c0 RBP: ffffea0000da52c0 R08: 0000000000000000 R09: ffffea0000da52c7 R10: fffff940001b4a58 R11: 0000000000000001 R12: 00000000000001ef R13: dffffc0000000000 R14: 00000000000001fe R15: ffffea0000da52c0 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: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: 0033:0x7fbe66e66b19 Code: Unable to access opcode bytes at RIP 0x7fbe66e66aef. RSP: 002b:00007fbe643dc188 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: 0000000000000004 RBX: 00007fbe66f79f60 RCX: 00007fbe66e66b19 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000010 RBP: 00007fbe66ec0f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff334ecb8f R14: 00007fbe643dc300 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:711 ---------------- Code disassembly (best guess): 0: 8d 3c 8d 10 ef d6 85 lea -0x7a2910f0(,%rcx,4),%edi 7: 49 89 f8 mov %rdi,%r8 a: 49 c1 e8 03 shr $0x3,%r8 e: 45 0f b6 04 10 movzbl (%r8,%rdx,1),%r8d 13: 48 89 fa mov %rdi,%rdx 16: 83 e2 07 and $0x7,%edx 19: 83 c2 03 add $0x3,%edx 1c: 44 38 c2 cmp %r8b,%dl 1f: 7c 09 jl 0x2a 21: 45 84 c0 test %r8b,%r8b 24: 0f 85 67 12 00 00 jne 0x1291 * 2a: 44 8d 46 01 lea 0x1(%rsi),%r8d <-- trapping instruction 2e: 8b 0c 8d 10 ef d6 85 mov -0x7a2910f0(,%rcx,4),%ecx 35: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 3c: fc ff df 3f: 4a rex.WX