RBP: 00007f95d4e5b040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000040
R13: 00000000200000c0 R14: 00007f95d4e5b000 R15: 00000000200014c0
------------[ cut here ]------------
WARNING: kernel/printk/printk_ringbuffer.c:1278 at get_data+0x364/0x400, CPU#0: syz-executor.6/21352
Modules linked in:
CPU: 0 UID: 0 PID: 21352 Comm: syz-executor.6 Not tainted 6.18.0-rc2-next-20251023 #1 PREEMPT(voluntary)
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:get_data+0x364/0x400
Code: e8 83 e0 07 83 c0 03 38 d0 0f 8c be fe ff ff 84 d2 0f 84 b6 fe ff ff 48 89 ef e8 07 89 5b 00 e9 a9 fe ff ff e8 cd b7 1e 00 90 <0f> 0b 90 45 31 e4 e9 3b ff ff ff e8 bc b7 1e 00 90 0f 0b 90 45 31
RSP: 0018:ffff88806ce08788 EFLAGS: 00010046
RAX: 0000000000010001 RBX: ffff88806ce088a0 RCX: ffffffff81556526
RDX: ffff88800a7ad280 RSI: ffffffff815566f3 RDI: 0000000000000006
RBP: ffff88806ce08868 R08: 00000000000011cb R09: 000001e37f5713e7
R10: 0000000000000000 R11: 000053688200001b R12: ffffffff85d30690
R13: 00003fffffffffff R14: 0000000000000000 R15: 0000000000000000
FS: 00007f95d4e5b700(0000) GS:ffff8880e53f6000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f95d4e5af78 CR3: 0000000016e8d000 CR4: 0000000000350ef0
Call Trace:
_prb_read_valid+0x2f3/0x830
prb_read_valid+0x78/0xa0
printk_get_next_message+0x10b/0x570
console_flush_all+0x630/0xb70
console_unlock+0xc2/0x1f0
wake_up_klogd_work_func+0xcf/0x110
irq_work_single+0x128/0x260
irq_work_run_list+0x91/0xc0
update_process_times+0x12f/0x210
tick_nohz_handler+0x414/0x6d0
__hrtimer_run_queues+0x60f/0xac0
hrtimer_interrupt+0x369/0x830
__sysvec_apic_timer_interrupt+0xbb/0x330
sysvec_apic_timer_interrupt+0x6b/0x80
asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:dump_stack_lvl+0x115/0x120
Code: fc ff ff 4c 89 e2 31 f6 31 ff e8 86 a7 72 fc e8 f1 b7 9c fc 48 89 ee 31 ff e8 27 7c bc fc e8 c2 80 bc fc e8 6d dd c4 fc fb 5b <5d> 41 5c e9 b3 80 bc fc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffff88801826f350 EFLAGS: 00000206
RAX: 00000000000000eb RBX: ffffffff85f036e0 RCX: 0000000000000040
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff84b79e03
RBP: 0000000000000200 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff86645c57 R11: 0000000000000001 R12: ffffffff85518ce0
R13: ffffffff85f036f0 R14: 0000000000000000 R15: 0000000000000000
should_fail_ex+0x4d7/0x5e0
should_failslab+0xc2/0x120
kmem_cache_alloc_noprof+0x80/0x690
__es_insert_extent+0xed2/0x1370
ext4_es_insert_extent+0x4d0/0x1100
ext4_ext_map_blocks+0x178d/0x5f70
ext4_map_query_blocks+0x117/0x890
ext4_map_blocks+0x4b3/0x14a0
ext4_append+0x1b6/0x530
ext4_init_new_dir+0x13c/0x240
ext4_mkdir+0x3c5/0xb30
vfs_mkdir+0x59a/0x8d0
do_mkdirat+0x19f/0x3d0
__x64_sys_mkdir+0xf3/0x140
do_syscall_64+0xbf/0x390
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f95d78e4c27
Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 53 00 00 00 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:00007f95d4e5afa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f95d78e4c27
RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00000000200000c0
RBP: 00007f95d4e5b040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000040
R13: 00000000200000c0 R14: 00007f95d4e5b000 R15: 00000000200014c0
irq event stamp: 236
hardirqs last enabled at (235): [] dump_stack_lvl+0x113/0x120
hardirqs last disabled at (236): [] sysvec_apic_timer_interrupt+0xf/0x80
softirqs last enabled at (230): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (219): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
No source specified
msdos: Invalid uid '0x00000000ffffffff'
msdos: Invalid uid '0x00000000ffffffff'
No source specified
No source specified
No source specified
msdos: Bad value for 'allow_utime'
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 UID: 0 PID: 21519 Comm: syz-executor.6 Tainted: G W 6.18.0-rc2-next-20251023 #1 PREEMPT(voluntary)
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0xfa/0x120
should_fail_ex+0x4d7/0x5e0
should_failslab+0xc2/0x120
__kmalloc_noprof+0xcd/0x680
ext4_find_extent+0x7f5/0xa00
ext4_ext_map_blocks+0x1cc/0x5f70
ext4_map_blocks+0x624/0x14a0
ext4_getblk+0x682/0x8e0
ext4_bread+0x2e/0x1a0
ext4_append+0x224/0x530
ext4_init_new_dir+0x13c/0x240
ext4_mkdir+0x3c5/0xb30
vfs_mkdir+0x59a/0x8d0
do_mkdirat+0x19f/0x3d0
__x64_sys_mkdir+0xf3/0x140
do_syscall_64+0xbf/0x390
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f95d78e4c27
Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 53 00 00 00 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:00007f95d4e5afa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f95d78e4c27
RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00000000200000c0
RBP: 00007f95d4e5b040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000040
R13: 00000000200000c0 R14: 00007f95d4e5b000 R15: 00000000200014c0
----------------
Code disassembly (best guess), 2 bytes skipped:
0: ff 4c 89 e2 decl -0x1e(%rcx,%rcx,4)
4: 31 f6 xor %esi,%esi
6: 31 ff xor %edi,%edi
8: e8 86 a7 72 fc callq 0xfc72a793
d: e8 f1 b7 9c fc callq 0xfc9cb803
12: 48 89 ee mov %rbp,%rsi
15: 31 ff xor %edi,%edi
17: e8 27 7c bc fc callq 0xfcbc7c43
1c: e8 c2 80 bc fc callq 0xfcbc80e3
21: e8 6d dd c4 fc callq 0xfcc4dd93
26: fb sti
27: 5b pop %rbx
* 28: 5d pop %rbp <-- trapping instruction
29: 41 5c pop %r12
2b: e9 b3 80 bc fc jmpq 0xfcbc80e3
30: 0f 1f 00 nopl (%rax)
33: 90 nop
34: 90 nop
35: 90 nop
36: 90 nop
37: 90 nop
38: 90 nop
39: 90 nop
3a: 90 nop
3b: 90 nop
3c: 90 nop
3d: 90 nop