watchdog: BUG: soft lockup - CPU#1 stuck for 21s! [syz-executor.2:10464] Modules linked in: irq event stamp: 5350015 hardirqs last enabled at (5350014): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (5350015): [] sysvec_apic_timer_interrupt+0xf/0x90 softirqs last enabled at (5207956): [] __irq_exit_rcu+0xcc/0x110 softirqs last disabled at (5207959): [] __irq_exit_rcu+0xcc/0x110 CPU: 1 PID: 10464 Comm: syz-executor.2 Not tainted 6.2.0-rc7-next-20230213 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__kasan_slab_free+0x10d/0x190 Code: 8b 45 1c 0f b6 cb 4c 89 e7 ba fb 00 00 00 83 e8 01 83 c8 07 8d 70 01 e8 61 36 00 00 4c 89 e6 4c 89 ef e8 86 2b 00 00 4c 89 e6 <5b> 4c 89 ef 5d 41 5c 41 5d e9 95 3c 00 00 a9 ff 0f 00 00 0f 85 42 RSP: 0018:ffff88806cf09bf0 EFLAGS: 00000286 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffff88806c9b12a8 RDX: 0000000000000000 RSI: ffff888044853600 RDI: 0000000000000000 RBP: ffffffff83604a58 R08: 0000000072b64fcc R09: ffff888043a38958 R10: fffffbfff0ba2b9a R11: 0000000000000001 R12: ffff888044853600 R13: ffff888008f9f140 R14: 0000000000000000 R15: ffff888042e38e30 FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555709c58 CR3: 000000000982e000 CR4: 0000000000350ee0 Call Trace: kmem_cache_free+0xff/0x510 skb_release_data+0x708/0x840 consume_skb+0xcb/0x170 mac80211_hwsim_tx_frame+0x1f6/0x2a0 mac80211_hwsim_beacon_tx+0x567/0xb10 __iterate_interfaces+0x2d3/0x580 ieee80211_iterate_active_interfaces_atomic+0x73/0x1c0 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x54b/0xcb0 hrtimer_run_softirq+0x14c/0x310 __do_softirq+0x258/0x8a2 __irq_exit_rcu+0xcc/0x110 irq_exit_rcu+0x9/0x20 sysvec_apic_timer_interrupt+0x6e/0x90 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:write_comp_data+0x3c/0x90 Code: 81 e6 00 01 00 00 65 48 8b 14 25 80 89 03 00 a9 00 01 ff 00 74 0e 85 f6 74 59 8b 82 0c 14 00 00 85 c0 74 4f 8b 82 e8 13 00 00 <83> f8 03 75 44 48 8b 82 f0 13 00 00 8b 92 ec 13 00 00 48 8b 38 48 RSP: 0018:ffff88800e8376c8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff816f45c3 RDX: ffff888043a38000 RSI: 0000000000000000 RDI: 0000000000000001 RBP: ffff88804415e300 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: ffff88800e837ad8 R14: dffffc0000000000 R15: 00000000ffffffc1 trace_rss_stat+0x193/0x250 unmap_page_range+0x128d/0x2da0 unmap_single_vma+0x194/0x2a0 unmap_vmas+0x233/0x390 exit_mmap+0x15b/0x6a0 mmput+0xd5/0x390 do_exit+0x9c6/0x2800 do_group_exit+0xd4/0x2a0 get_signal+0x23c8/0x2450 arch_do_signal_or_restart+0x79/0x590 exit_to_user_mode_prepare+0xeb/0x180 syscall_exit_to_user_mode+0x1d/0x50 do_syscall_64+0x4c/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f25c0103b19 Code: Unable to access opcode bytes at 0x7f25c0103aef. RSP: 002b:00007f25bd679218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f25c0216f68 RCX: 00007f25c0103b19 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f25c0216f68 RBP: 00007f25c0216f60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f25c0216f6c R13: 00007ffc4bf0ea8f R14: 00007f25bd679300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at default_idle+0xf/0x20 ---------------- Code disassembly (best guess): 0: 8b 45 1c mov 0x1c(%rbp),%eax 3: 0f b6 cb movzbl %bl,%ecx 6: 4c 89 e7 mov %r12,%rdi 9: ba fb 00 00 00 mov $0xfb,%edx e: 83 e8 01 sub $0x1,%eax 11: 83 c8 07 or $0x7,%eax 14: 8d 70 01 lea 0x1(%rax),%esi 17: e8 61 36 00 00 callq 0x367d 1c: 4c 89 e6 mov %r12,%rsi 1f: 4c 89 ef mov %r13,%rdi 22: e8 86 2b 00 00 callq 0x2bad 27: 4c 89 e6 mov %r12,%rsi * 2a: 5b pop %rbx <-- trapping instruction 2b: 4c 89 ef mov %r13,%rdi 2e: 5d pop %rbp 2f: 41 5c pop %r12 31: 41 5d pop %r13 33: e9 95 3c 00 00 jmpq 0x3ccd 38: a9 ff 0f 00 00 test $0xfff,%eax 3d: 0f .byte 0xf 3e: 85 .byte 0x85 3f: 42 rex.X