loop5: detected capacity change from 0 to 264192 FAT-fs (loop5): invalid media value (0x9b) FAT-fs (loop5): Can't find a valid FAT filesystem watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.4:13998] Modules linked in: irq event stamp: 2504239 hardirqs last enabled at (2504238): [] irqentry_exit+0x3b/0x90 hardirqs last disabled at (2504239): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (2483778): [] handle_softirqs+0x50c/0x770 softirqs last disabled at (2483781): [] __irq_exit_rcu+0xc4/0x100 CPU: 1 UID: 0 PID: 13998 Comm: syz-executor.4 Not tainted 6.12.0-rc7-next-20241115 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:arch_stack_walk+0x8d/0xf0 Code: 8b 95 68 ff ff ff 85 d2 75 24 eb 36 4c 89 e7 e8 a9 cb 79 03 84 c0 74 2a 48 8d bd 68 ff ff ff e8 29 89 07 00 8b 85 68 ff ff ff <85> c0 74 14 48 8d bd 68 ff ff ff e8 83 86 07 00 48 89 c6 48 85 c0 RSP: 0018:ffff88806cf09a78 EFLAGS: 00000292 RAX: 0000000000000002 RBX: ffffffff813f2300 RCX: 0000000000000001 RDX: ffff88806cf09e70 RSI: ffff88806cf09e58 RDI: ffff88806cf09a88 RBP: ffff88806cf09b10 R08: 0000000000000001 R09: ffff88806cf09ab8 R10: 000000000003c001 R11: 00000000000226af R12: ffff88806cf09b40 R13: 0000000000000000 R14: ffff8880165b0000 R15: ffff888030662a68 FS: 00007fa1f3d8b700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d023000 CR3: 0000000034916000 CR4: 0000000000350ef0 Call Trace: stack_trace_save+0x8f/0xc0 kasan_save_stack+0x24/0x50 kasan_save_track+0x14/0x30 kasan_save_free_info+0x3a/0x60 __kasan_slab_free+0x38/0x50 kmem_cache_free+0x138/0x470 rcu_core+0x7c9/0x1790 handle_softirqs+0x1b1/0x770 __irq_exit_rcu+0xc4/0x100 irq_exit_rcu+0x9/0x20 sysvec_apic_timer_interrupt+0x70/0x80 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:put_cpu_partial+0x10a/0x1b0 Code: 24 28 75 5b 49 c7 44 24 28 00 00 00 00 4c 89 e7 48 8d 35 00 00 00 00 e8 14 9a ab ff 4d 85 ed 74 06 e8 8a 62 d5 ff fb 4d 85 f6 <74> 1c 5b 4c 89 f6 48 89 ef 5d 41 5c 41 5d 41 5e e9 c1 fa ff ff 44 RSP: 0018:ffff888037f2ed40 EFLAGS: 00000246 RAX: 0000000000258869 RBX: ffffea0000377400 RCX: 1ffffffff0fdfecf RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff81849d96 RBP: ffff888008c4f780 R08: 0000000000000001 R09: fffffbfff0fdddf1 R10: ffffffff87eeef8f R11: 0000000000000000 R12: ffff88806cf40350 R13: 0000000000000200 R14: 0000000000000000 R15: ffff88800ddd0940 qlist_free_all+0x50/0x160 kasan_quarantine_reduce+0x19f/0x240 __kasan_slab_alloc+0x49/0x70 kmem_cache_alloc_noprof+0x13d/0x3d0 __alloc_object+0x2f/0x270 __create_object+0x1d/0x80 kmem_cache_alloc_node_noprof+0x311/0x3e0 __alloc_skb+0x2ad/0x370 alloc_skb_with_frags+0x8f/0x7c0 sock_alloc_send_pskb+0x7e7/0x970 __ip_append_data+0x14de/0x3f80 ip_make_skb+0x22d/0x2a0 udp_sendmsg+0x1644/0x22d0 udpv6_sendmsg+0x1730/0x2920 inet6_sendmsg+0x109/0x150 ____sys_sendmsg+0x80c/0xc80 ___sys_sendmsg+0x110/0x1b0 __sys_sendmmsg+0x1f6/0x420 __x64_sys_sendmmsg+0x9d/0x110 do_syscall_64+0xbf/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa1f6815b19 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:00007fa1f3d8b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007fa1f6928f60 RCX: 00007fa1f6815b19 RDX: 0000000000000002 RSI: 0000000020009ac0 RDI: 0000000000000006 RBP: 00007fa1f686ff6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc525fa3af R14: 00007fa1f3d8b300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at default_idle+0x1e/0x30 ---------------- Code disassembly (best guess): 0: 8b 95 68 ff ff ff mov -0x98(%rbp),%edx 6: 85 d2 test %edx,%edx 8: 75 24 jne 0x2e a: eb 36 jmp 0x42 c: 4c 89 e7 mov %r12,%rdi f: e8 a9 cb 79 03 callq 0x379cbbd 14: 84 c0 test %al,%al 16: 74 2a je 0x42 18: 48 8d bd 68 ff ff ff lea -0x98(%rbp),%rdi 1f: e8 29 89 07 00 callq 0x7894d 24: 8b 85 68 ff ff ff mov -0x98(%rbp),%eax * 2a: 85 c0 test %eax,%eax <-- trapping instruction 2c: 74 14 je 0x42 2e: 48 8d bd 68 ff ff ff lea -0x98(%rbp),%rdi 35: e8 83 86 07 00 callq 0x786bd 3a: 48 89 c6 mov %rax,%rsi 3d: 48 85 c0 test %rax,%rax