watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.0:15304] Modules linked in: irq event stamp: 3939295 hardirqs last enabled at (3939294): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (3939295): [] sysvec_apic_timer_interrupt+0xf/0xc0 softirqs last enabled at (3925426): [] irq_exit_rcu+0x11f/0x190 softirqs last disabled at (3925429): [] irq_exit_rcu+0x11f/0x190 CPU: 1 PID: 15304 Comm: syz-executor.0 Not tainted 6.2.0-rc4-next-20230119 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:_raw_spin_unlock_irqrestore+0x32/0x60 Code: 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8 d6 3e e7 fc 48 89 ef e8 de b7 e7 fc 80 e7 02 74 06 e8 34 9f 0b fd fb bf 01 00 00 00 b9 05 dd fc 65 8b 05 9a a7 be 7b 85 c0 74 07 5b 5d e9 4b 29 00 RSP: 0018:ffff88806cf09b18 EFLAGS: 00000206 RAX: 00000000003c1bac RBX: 0000000000000246 RCX: ffffffff812b827f RDX: 0000000000000000 RSI: 0000000000000103 RDI: 0000000000000001 RBP: ffffffff856d4c00 R08: 0000000000000001 R09: ffffffff8765b96f R10: fffffbfff0ecb72d R11: 0000000000000001 R12: ffff888008795dc0 R13: 0000000000000820 R14: 0000000000000000 R15: 0000000000000820 FS: 00007efe9f5d7700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020007038 CR3: 0000000036262000 CR4: 0000000000350ee0 Call Trace: kmem_cache_alloc_node+0x215/0x310 __alloc_skb+0x21a/0x310 __netdev_alloc_skb+0x76/0x3e0 __ieee80211_beacon_get+0x3d9/0x13c0 ieee80211_beacon_get_tim+0x99/0x540 mac80211_hwsim_beacon_tx+0x1d3/0xb10 __iterate_interfaces+0x2d3/0x580 ieee80211_iterate_active_interfaces_atomic+0x73/0x1c0 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x54b/0xcb0 hrtimer_run_softirq+0x176/0x350 __do_softirq+0x274/0x8ff irq_exit_rcu+0x11f/0x190 sysvec_apic_timer_interrupt+0x92/0xc0 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:do_raw_spin_unlock+0x24/0x220 Code: 90 90 90 90 90 90 66 0f 1f 00 48 b8 00 00 00 00 00 fc ff df 41 54 55 53 48 89 fb 48 83 c7 04 48 89 fa 48 c1 ea 03 0f b6 14 02 <48> 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 b9 01 00 00 81 RSP: 0018:ffff888044f272b0 EFLAGS: 00000217 RAX: dffffc0000000000 RBX: ffff88806cf3f6c0 RCX: ffff888044f27258 RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff88806cf3f6c4 RBP: ffff88806cf3f6c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000003 R13: 0000000000044d60 R14: 0000000000000000 R15: ffff88807ffdc500 _raw_spin_unlock+0x1e/0x50 free_unref_page+0x291/0x3c0 __unfreeze_partials+0x130/0x150 qlist_free_all+0x6d/0x1a0 kasan_quarantine_reduce+0x199/0x230 __kasan_kmalloc+0x6f/0x90 __kmalloc+0x56/0xc0 ext4_find_extent+0xa41/0xd30 ext4_ext_map_blocks+0x1c7/0x5dd0 ext4_da_get_block_prep+0xcbb/0x1180 __block_write_begin_int+0x380/0x13d0 ext4_da_write_begin+0x357/0x9c0 generic_perform_write+0x25a/0x580 ext4_buffered_write_iter+0x164/0x460 ext4_file_write_iter+0x3ff/0x1930 vfs_write+0x9c7/0xdd0 ksys_write+0x12b/0x260 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7efea2061b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007efe9f5d7188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007efea2174f60 RCX: 00007efea2061b19 RDX: 00000000000292e9 RSI: 0000000020000080 RDI: 0000000000000007 RBP: 00007efea20bbf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe3c4acc0f R14: 00007efe9f5d7300 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: 48 83 c7 18 add $0x18,%rdi 4: 53 push %rbx 5: 48 89 f3 mov %rsi,%rbx 8: 48 8b 74 24 10 mov 0x10(%rsp),%rsi d: e8 d6 3e e7 fc callq 0xfce73ee8 12: 48 89 ef mov %rbp,%rdi 15: e8 de b7 e7 fc callq 0xfce7b7f8 1a: 80 e7 02 and $0x2,%bh 1d: 74 06 je 0x25 1f: e8 34 9f 0b fd callq 0xfd0b9f58 24: fb sti 25: bf 01 00 00 00 mov $0x1,%edi * 2a: e8 b9 05 dd fc callq 0xfcdd05e8 <-- trapping instruction 2f: 65 8b 05 9a a7 be 7b mov %gs:0x7bbea79a(%rip),%eax # 0x7bbea7d0 36: 85 c0 test %eax,%eax 38: 74 07 je 0x41 3a: 5b pop %rbx 3b: 5d pop %rbp 3c: e9 .byte 0xe9 3d: 4b 29 00 rex.WXB sub %rax,(%r8)