watchdog: BUG: soft lockup - CPU#0 stuck for 21s! [syz-executor.5:7991] Modules linked in: irq event stamp: 2847169 hardirqs last enabled at (2847168): [] irqentry_exit+0x3b/0x90 hardirqs last disabled at (2847169): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (2819518): [] handle_softirqs+0x50c/0x770 softirqs last disabled at (2819523): [] __irq_exit_rcu+0xc4/0x100 CPU: 0 UID: 0 PID: 7991 Comm: syz-executor.5 Not tainted 6.13.0-rc1-next-20241206 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:arch_stack_walk+0x79/0xf0 Code: 00 00 4c 89 ea 4c 89 f6 48 8d bd 68 ff ff ff e8 2d a5 07 00 8b 95 68 ff ff ff 85 d2 75 24 eb 36 4c 89 e7 e8 99 35 7a 03 84 c0 <74> 2a 48 8d bd 68 ff ff ff e8 69 80 07 00 8b 85 68 ff ff ff 85 c0 RSP: 0018:ffff88806ce09a78 EFLAGS: 00000202 RAX: 0000000000000001 RBX: ffffffff815f0170 RCX: 0000000000000001 RDX: 1ffff1100d9c1383 RSI: ffffffff81abe8af RDI: ffff88806ce09b4c RBP: ffff88806ce09b10 R08: 0000000000000001 R09: ffff88806ce09ab8 R10: 000000000003a7a3 R11: 000000000002438e R12: ffff88806ce09b40 R13: 0000000000000000 R14: ffff88800e681bc0 R15: ffff888009acca68 FS: 00007f26ae444700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005592749e8b48 CR3: 0000000032d78000 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+0x7c9/0x17a0 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 f4 a9 ab ff 4d 85 ed 74 06 e8 da 71 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:ffff8880401e7090 EFLAGS: 00000246 RAX: 00000000002b05c1 RBX: ffffea00003361c0 RCX: 1ffffffff0fdfcc7 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff81a47976 RBP: ffff888008c4f780 R08: 0000000000000001 R09: fffffbfff0fddbe9 R10: ffffffff87eedf4f R11: 0000000000000000 R12: ffff88806ce40390 R13: 0000000000000200 R14: 0000000000000000 R15: ffff88800cd874a0 qlist_free_all+0x50/0x160 kasan_quarantine_reduce+0x19f/0x240 __kasan_slab_alloc+0x49/0x70 kmem_cache_alloc_noprof+0x13d/0x3d0 ext4_mb_new_blocks+0x2468/0x45d0 ext4_ext_map_blocks+0x1aea/0x5b10 ext4_map_blocks+0x3f1/0x1500 ext4_iomap_begin+0x3aa/0x710 iomap_iter+0x46d/0xf70 __iomap_dio_rw+0x6d5/0x1cf0 iomap_dio_rw+0x40/0xa0 ext4_file_write_iter+0xd7f/0x18e0 vfs_write+0xbe2/0x10b0 ksys_write+0x122/0x240 do_syscall_64+0xbf/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f26b0eceb19 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:00007f26ae444188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f26b0fe1f60 RCX: 00007f26b0eceb19 RDX: 0000000000140000 RSI: 0000000020000200 RDI: 0000000000000003 RBP: 00007f26b0f28f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe0049069f R14: 00007f26ae444300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at default_idle+0x1e/0x30 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 4c 89 ea mov %r13,%rdx 5: 4c 89 f6 mov %r14,%rsi 8: 48 8d bd 68 ff ff ff lea -0x98(%rbp),%rdi f: e8 2d a5 07 00 callq 0x7a541 14: 8b 95 68 ff ff ff mov -0x98(%rbp),%edx 1a: 85 d2 test %edx,%edx 1c: 75 24 jne 0x42 1e: eb 36 jmp 0x56 20: 4c 89 e7 mov %r12,%rdi 23: e8 99 35 7a 03 callq 0x37a35c1 28: 84 c0 test %al,%al * 2a: 74 2a je 0x56 <-- trapping instruction 2c: 48 8d bd 68 ff ff ff lea -0x98(%rbp),%rdi 33: e8 69 80 07 00 callq 0x780a1 38: 8b 85 68 ff ff ff mov -0x98(%rbp),%eax 3e: 85 c0 test %eax,%eax