EXT4-fs error (device loop1): ext4_validate_block_bitmap:431: comm syz-executor.1: bg 0: block 2: invalid block bitmap loop5: detected capacity change from 0 to 512 workqueue: Failed to create a rescuer kthread for wq "ext4-rsv-conversion": -EINTR EXT4-fs: failed to create workqueue EXT4-fs (loop5): mount failed watchdog: BUG: soft lockup - CPU#1 stuck for 26s! [syz-executor.6:4936] Modules linked in: irq event stamp: 3048983 hardirqs last enabled at (3048982): [<ffffffff8460158a>] asm_sysvec_irq_work+0x1a/0x20 hardirqs last disabled at (3048983): [<ffffffff844e134f>] sysvec_apic_timer_interrupt+0xf/0x90 softirqs last enabled at (2571384): [<ffffffff8118de43>] irq_exit_rcu+0x93/0xc0 softirqs last disabled at (2571387): [<ffffffff8118de43>] irq_exit_rcu+0x93/0xc0 CPU: 1 PID: 4936 Comm: syz-executor.6 Not tainted 6.4.0-rc3-next-20230525 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__rcu_read_unlock+0xc8/0x4f0 Code: b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 76 01 00 00 8b 85 f8 03 00 00 85 c0 75 58 <65> 48 8b 1c 25 c0 8c 03 00 48 8d bb f4 03 00 00 48 b8 00 00 00 00 RSP: 0018:ffff88806cf095d0 EFLAGS: 00000202 RAX: 00000000002daf4c RBX: ffff88806cf3a480 RCX: ffffffff812cdbbf RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff813731b1 RBP: ffffffff85616280 R08: 0000000000000001 R09: fffffbfff0ef458b R10: ffffffff877a2c5f R11: 0000000000000001 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000200 R15: 0000000000092820 FS: 00007f939062c700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555ad3c58 CR3: 000000001a748000 CR4: 0000000000350ee0 Call Trace: <IRQ> __is_insn_slot_addr+0x12f/0x290 kernel_text_address+0x48/0xc0 __kernel_text_address+0xd/0x40 unwind_get_return_address+0x59/0xa0 arch_stack_walk+0x9d/0xf0 stack_trace_save+0x90/0xd0 kasan_save_stack+0x22/0x50 kasan_set_track+0x25/0x30 __kasan_slab_alloc+0x59/0x70 kmem_cache_alloc+0x172/0x390 __create_object+0x3c/0xc90 kmem_cache_alloc_node+0x229/0x3a0 kmalloc_reserve+0x169/0x270 __alloc_skb+0x129/0x330 ndisc_alloc_skb+0x134/0x330 ndisc_send_rs+0x22b/0x550 addrconf_rs_timer+0x2f0/0x810 call_timer_fn+0x17d/0x4e0 expire_timers+0x272/0x460 run_timer_softirq+0x2f5/0x880 __do_softirq+0x1b7/0x7d4 irq_exit_rcu+0x93/0xc0 sysvec_irq_work+0x6e/0x90 </IRQ> <TASK> asm_sysvec_irq_work+0x1a/0x20 RIP: 0010:finish_task_switch.isra.0+0x20d/0x830 Code: 89 ff 48 c7 03 00 00 00 00 e8 6f 3e 2d 03 4d 85 e4 75 ba 4c 89 ff e8 42 19 2d 03 e8 8d f7 2f 00 fb 65 48 8b 1c 25 c0 8c 03 00 <48> 8d bb 80 14 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 RSP: 0018:ffff888044c275f8 EFLAGS: 00000202 RAX: 0000000000004d31 RBX: ffff888042c4d1c0 RCX: ffffffff812cdbbf RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff81233f83 RBP: ffff888044c27638 R08: 0000000000000001 R09: fffffbfff0ef457d R10: ffffffff877a2bef R11: 0000000000000001 R12: ffff88806cf396d8 R13: ffff888016d5d1c0 R14: ffff88800f4784a8 R15: ffff88806cf396c0 __schedule+0x9b1/0x2b10 __cond_resched+0x46/0x70 unmap_vmas+0x185/0x390 unmap_region+0x1b9/0x2d0 do_vmi_align_munmap.constprop.0+0xb66/0x1220 do_vmi_munmap+0x1ec/0x2c0 mmap_region+0x1e9/0x2650 do_mmap+0x84e/0xee0 vm_mmap_pgoff+0x1a6/0x3a0 ksys_mmap_pgoff+0x3a3/0x4f0 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f93930b6b19 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:00007f939062c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007f93931c9f60 RCX: 00007f93930b6b19 RDX: 0000000001000004 RSI: 0000000000002000 RDI: 0000000020ffc000 RBP: 00007f9393110f6d R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000002811 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd06af539f R14: 00007f939062c300 R15: 0000000000022000 </TASK> 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: b8 00 00 00 00 mov $0x0,%eax 5: 00 fc add %bh,%ah 7: ff (bad) 8: df 48 89 fisttps -0x77(%rax) b: fa cli c: 48 c1 ea 03 shr $0x3,%rdx 10: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax 14: 84 c0 test %al,%al 16: 74 08 je 0x20 18: 3c 03 cmp $0x3,%al 1a: 0f 8e 76 01 00 00 jle 0x196 20: 8b 85 f8 03 00 00 mov 0x3f8(%rbp),%eax 26: 85 c0 test %eax,%eax 28: 75 58 jne 0x82 * 2a: 65 48 8b 1c 25 c0 8c mov %gs:0x38cc0,%rbx <-- trapping instruction 31: 03 00 33: 48 8d bb f4 03 00 00 lea 0x3f4(%rbx),%rdi 3a: 48 rex.W 3b: b8 00 00 00 00 mov $0x0,%eax