loop4: detected capacity change from 0 to 524288 EXT4-fs warning (device loop4): ext4_enable_quotas:6504: Failed to enable quota tracking (type=0, err=-22, ino=3). Please run e2fsck to fix. EXT4-fs (loop4): mount failed watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor:6022] Modules linked in: irq event stamp: 3940514 hardirqs last enabled at (3940513): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (3940514): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (30456): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (30261): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 6022 Comm: syz-executor Not tainted 5.10.240 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__preempt_count_sub arch/x86/include/asm/preempt.h:84 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x25/0x40 kernel/locking/spinlock.c:191 Code: 36 00 0f 1f 00 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8 9a e0 3d fd 48 89 ef e8 f2 9a 3e fd f6 c7 02 75 10 53 9d <65> ff 0d 64 fd 18 7c 5b 5d e9 dd cd 36 00 e8 38 c9 5d fd eb e9 66 RSP: 0018:ffff88804962fc40 EFLAGS: 00000287 RAX: 00000000003c1fd9 RBX: 0000000000000287 RCX: 1ffffffff0d11c02 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff83e971e8 RBP: ffff88800f744bd0 R08: 0000000000000001 R09: ffffffff8686e6f7 R10: fffffbfff0d0dcde R11: 0000000000000001 R12: dffffc0000000000 R13: ffff888009b18dd8 R14: ffff88800f744c28 R15: ffffffff844e6900 FS: 000055558c832400(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffed83d2080 CR3: 00000000180b8000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 00000000dddd06aa Call Trace: kmemleak_scan+0x1bd/0x13f0 mm/kmemleak.c:1435 kmemleak_write+0x576/0x680 mm/kmemleak.c:1826 full_proxy_write+0x11d/0x190 fs/debugfs/file.c:244 vfs_write+0x29a/0xb10 fs/read_write.c:603 ksys_write+0x12d/0x260 fs/read_write.c:658 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7f0a9dc6a5c3 Code: 16 00 00 00 eb ae 90 b8 6e 00 00 00 eb a6 e8 44 ef 04 00 0f 1f 40 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 55 c3 0f 1f 40 00 48 83 ec 28 48 89 54 24 18 RSP: 002b:00007ffed83bb7b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007ffed83bbdf8 RCX: 00007f0a9dc6a5c3 RDX: 0000000000000004 RSI: 00007f0a9dd20ed9 RDI: 0000000000000003 RBP: 0000000000000003 R08: 000000000000028f R09: 00007ffed83d2080 R10: 00007ffed83d2090 R11: 0000000000000246 R12: 00007f0a9dc6cb10 R13: 00007ffed83bdeda R14: 0000000000000000 R15: 000000000009ff9d Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline] NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline] NMI backtrace for cpu 1 skipped: idling at default_idle+0xe/0x20 arch/x86/kernel/process.c:717 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 0f 1f 00 nopl (%rax) 3: 55 push %rbp 4: 48 89 fd mov %rdi,%rbp 7: 48 83 c7 18 add $0x18,%rdi b: 53 push %rbx c: 48 89 f3 mov %rsi,%rbx f: 48 8b 74 24 10 mov 0x10(%rsp),%rsi 14: e8 9a e0 3d fd callq 0xfd3de0b3 19: 48 89 ef mov %rbp,%rdi 1c: e8 f2 9a 3e fd callq 0xfd3e9b13 21: f6 c7 02 test $0x2,%bh 24: 75 10 jne 0x36 26: 53 push %rbx 27: 9d popfq * 28: 65 ff 0d 64 fd 18 7c decl %gs:0x7c18fd64(%rip) # 0x7c18fd93 <-- trapping instruction 2f: 5b pop %rbx 30: 5d pop %rbp 31: e9 dd cd 36 00 jmpq 0x36ce13 36: e8 38 c9 5d fd callq 0xfd5dc973 3b: eb e9 jmp 0x26 3d: 66 data16