Buffer I/O error on dev sr0, logical block 7, async page read isofs_fill_super: root inode is not a directory. Corrupted media? ------------[ cut here ]------------ percpu ref (free_ioctx_users) <= 0 (0) after switching to atomic WARNING: lib/percpu-refcount.c:197 at percpu_ref_switch_to_atomic_rcu+0x3cc/0x480, CPU#0: systemd-udevd/113 Modules linked in: CPU: 0 UID: 0 PID: 113 Comm: systemd-udevd Tainted: G W 6.17.0-rc3-next-20250829 #1 PREEMPT(voluntary) Tainted: [W]=WARN loop0: detected capacity change from 0 to 736 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:percpu_ref_switch_to_atomic_rcu+0x3cc/0x480 Code: 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 80 3c 01 00 0f 85 9e 00 00 00 49 8b 75 e8 48 c7 c7 80 97 e2 84 e8 75 c5 e9 fe 90 <0f> 0b 90 90 e9 2b ff ff ff e8 f6 de 5f ff e9 9e fe ff ff e8 7c df RSP: 0018:ffff88806ce08e20 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8139de70 RDX: ffff888015d1b700 RSI: ffffffff8139de7e RDI: 0000000000000001 RBP: 7fffffffffffffff R08: 0000000000000001 R09: ffffed100d9c117f R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800da63d00 R13: ffff88800da63d20 R14: 0000000000000002 R15: 0000000000000003 FS: 00007fa4c51c28c0(0000) GS:ffff8880e55dd000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000204af000 CR3: 000000000e0f9000 CR4: 0000000000350ef0 Call Trace: rcu_core+0x7c8/0x1800 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:__sanitizer_cov_trace_pc+0x8/0x80 Code: 4a 03 48 c7 c0 f4 ff ff ff eb 92 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 34 24 <65> 48 8b 15 88 48 10 06 65 8b 05 99 48 10 06 a9 00 01 ff 00 74 27 RSP: 0018:ffff888016417dd0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff8880179bf000 RCX: ffffffff8175392d RDX: 000000007fff0000 RSI: ffffffff81753945 RDI: 0000000000000004 RBP: 000000007fff0000 R08: 0000000000000000 R09: ffffed10031b8e06 R10: 000000007fff0000 R11: 0000000000000000 R12: 000000007fff0000 R13: dffffc0000000000 R14: 000000007fff0000 R15: 000000007fff0000 __seccomp_filter+0x215/0xfa0 __secure_computing+0x1ac/0x290 syscall_trace_enter+0x8d/0x240 do_syscall_64+0x2ac/0x360 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa4c5671d62 Code: c0 f6 c2 40 75 52 89 d0 45 31 d2 25 00 00 41 00 3d 00 00 41 00 74 41 64 8b 04 25 18 00 00 00 85 c0 75 65 b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 a2 00 00 00 48 8b 4c 24 38 64 48 2b 0c 25 RSP: 002b:00007fff8d4e0110 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fa4c5671d62 RDX: 00000000002a0000 RSI: 0000563e1f6155b1 RDI: 0000000000000013 loop3: detected capacity change from 0 to 184 RBP: 0000563e1f6155b0 R08: 0000563e038108f0 R09: 00007fa4c5741be0 R10: 0000000000000000 R11: 0000000000000246 R12: 0000563e1f64e04a R13: 0000000000000013 R14: 0000000000000005 R15: 0000563e1f6155b1 irq event stamp: 599188 hardirqs last enabled at (599198): [] __up_console_sem+0x78/0x80 hardirqs last disabled at (599207): [] __up_console_sem+0x5d/0x80 vfat: Unknown parameter 'rÚp‹v®^æ@' softirqs last enabled at (598526): [] handle_softirqs+0x50c/0x770 softirqs last disabled at (598541): [] __irq_exit_rcu+0xc4/0x100 ---[ end trace 0000000000000000 ]--- percpu_ref_switch_to_atomic_rcu: percpu_ref_switch_to_atomic_rcu(): percpu_ref underflow slab kmalloc-64 start ffff88800da63d00 pointer offset 0 size 64 isofs_fill_super: root inode is not a directory. Corrupted media? ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 48 c7 c0 f4 ff ff ff mov $0xfffffffffffffff4,%rax 7: eb 92 jmp 0xffffff9b 9: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: f3 0f 1e fa endbr64 24: 48 8b 34 24 mov (%rsp),%rsi * 28: 65 48 8b 15 88 48 10 mov %gs:0x6104888(%rip),%rdx # 0x61048b8 <-- trapping instruction 2f: 06 30: 65 8b 05 99 48 10 06 mov %gs:0x6104899(%rip),%eax # 0x61048d0 37: a9 00 01 ff 00 test $0xff0100,%eax 3c: 74 27 je 0x65