FAT-fs (loop5): bogus number of reserved sectors FAT-fs (loop5): Can't find a valid FAT filesystem loop6: detected capacity change from 0 to 40 FAT-fs (loop6): bogus number of reserved sectors FAT-fs (loop6): Can't find a valid FAT filesystem watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.1:8126] Modules linked in: irq event stamp: 13179617 hardirqs last enabled at (13179616): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (13179617): [] sysvec_apic_timer_interrupt+0xf/0xc0 softirqs last enabled at (13136700): [] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (13136703): [] __irq_exit_rcu+0x11b/0x180 CPU: 0 PID: 8126 Comm: syz-executor.1 Not tainted 6.1.0-rc5-next-20221115 #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 c6 31 ec fc 48 89 ef e8 8e a9 ec fc 80 e7 02 74 06 e8 94 18 10 fd fb bf 01 00 00 00 49 06 e2 fc 65 8b 05 da b0 c3 7b 85 c0 74 07 5b 5d e9 4b 29 00 RSP: 0018:ffff88806ce09bc0 EFLAGS: 00000206 RAX: 0000000000c91ad4 RBX: 0000000000000246 RCX: ffffffff812b698f RDX: 0000000000000000 RSI: 0000000000000102 RDI: 0000000000000001 RBP: ffffffff856d1e00 R08: 0000000000000001 R09: ffffffff8762f84f R10: fffffbfff0ec5f09 R11: 0000000000000001 R12: ffff88800cbaae40 R13: ffff88801ec3ee88 R14: ffff88800d9153d8 R15: ffff888008441c80 FS: 00007f7754202700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555cbdc98 CR3: 000000000efd0000 CR4: 0000000000350ef0 Call Trace: find_and_remove_object+0x123/0x170 kmemleak_free+0x25/0x40 __kmem_cache_free+0x95/0x410 skb_release_data+0x6d8/0x810 consume_skb+0xcb/0x170 mac80211_hwsim_tx_frame+0x1f6/0x2a0 mac80211_hwsim_beacon_tx+0x566/0xab0 __iterate_interfaces+0x2d3/0x560 ieee80211_iterate_active_interfaces_atomic+0x74/0x180 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x541/0xb50 hrtimer_run_softirq+0x176/0x350 __do_softirq+0x1c7/0x8f9 __irq_exit_rcu+0x11b/0x180 irq_exit_rcu+0x9/0x30 sysvec_apic_timer_interrupt+0x92/0xc0 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:unwind_next_frame+0x1fd/0x2130 Code: 48 89 54 24 28 48 89 74 24 20 44 89 5c 24 18 e8 39 0c 6a 00 48 8b 54 24 28 48 8b 74 24 20 44 8b 5c 24 18 8b 0c 95 5c 36 49 86 <8d> 56 01 48 b8 00 00 00 00 00 fc ff df 48 8d 3c 95 5c 36 49 86 49 RSP: 0018:ffff8880430b6fc8 EFLAGS: 00000246 RAX: 0000000000000003 RBX: 0000000000000001 RCX: 0000000000021654 RDX: 000000000000801f RSI: 000000000000801f RDI: ffffffff864b36d8 RBP: ffff8880430b70a0 R08: ffffffff860924d6 R09: ffffffff860924da R10: ffffed1008616e16 R11: 0000000000038001 R12: ffff8880430b7089 R13: ffff8880430b70a8 R14: ffff8880430b7048 R15: ffffffff81801fc3 arch_stack_walk+0x87/0xf0 stack_trace_save+0x90/0xd0 set_track_prepare+0x74/0xd0 __create_object+0x378/0xc00 kmem_cache_alloc+0x272/0x410 __kernfs_new_node+0xd4/0x8c0 kernfs_new_node+0x97/0x120 __kernfs_create_file+0x55/0x350 sysfs_add_file_mode_ns+0x21c/0x440 internal_create_group+0x322/0xb20 internal_create_groups.part.0+0x90/0x140 sysfs_create_groups+0x29/0x50 device_add+0x711/0x1ec0 netdev_register_kobject+0x17e/0x3b0 register_netdevice+0xd60/0x1530 register_netdev+0x31/0x60 loopback_net_init+0x77/0x170 ops_init+0xbb/0x680 setup_net+0x40c/0x9d0 copy_net_ns+0x31c/0x760 create_new_namespaces+0x3f6/0xb30 copy_namespaces+0x3b7/0x4a0 copy_process+0x29e3/0x7220 kernel_clone+0xeb/0x950 __do_sys_clone3+0x1d9/0x370 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f7756c8cb19 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:00007f7754202188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f7756d9ff60 RCX: 00007f7756c8cb19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020004c00 RBP: 00007f7756ce6f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcd1c0a33f R14: 00007f7754202300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 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 c6 31 ec fc callq 0xfcec31d8 12: 48 89 ef mov %rbp,%rdi 15: e8 8e a9 ec fc callq 0xfceca9a8 1a: 80 e7 02 and $0x2,%bh 1d: 74 06 je 0x25 1f: e8 94 18 10 fd callq 0xfd1018b8 24: fb sti 25: bf 01 00 00 00 mov $0x1,%edi * 2a: e8 49 06 e2 fc callq 0xfce20678 <-- trapping instruction 2f: 65 8b 05 da b0 c3 7b mov %gs:0x7bc3b0da(%rip),%eax # 0x7bc3b110 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)