RBP: 00007f3882b321d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffeb94a9b1f R14: 00007f3882b32300 R15: 0000000000022000
------------[ cut here ]------------
WARNING: kernel/printk/printk_ringbuffer.c:1278 at get_data+0x364/0x400, CPU#0: syz-executor.1/7751
Modules linked in:
CPU: 0 UID: 0 PID: 7751 Comm: syz-executor.1 Not tainted 6.18.0-rc4-next-20251104 #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 d7 f1 5b 00 e9 a9 fe ff ff e8 3d f2 1e 00 90 <0f> 0b 90 45 31 e4 e9 3b ff ff ff e8 2c f2 1e 00 90 0f 0b 90 45 31
RSP: 0018:ffff88803a3aee30 EFLAGS: 00010212
RAX: 000000000000a68b RBX: ffff88803a3aef48 RCX: ffffc90011c69000
RDX: 0000000000040000 RSI: ffffffff81559633 RDI: 0000000000000006
RBP: ffff88803a3aef10 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff85d2e3d0
R13: 00003fffffffffff R14: 0000000000000000 R15: 0000000000000000
FS: 00007fc02ac58700(0000) GS:ffff8880e53a8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007faa97222f78 CR3: 0000000017d3c000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
_prb_read_valid+0x2f3/0x830
prb_read_valid+0x78/0xa0
printk_get_next_message+0x10b/0x570
console_flush_one_record+0x64f/0xb20
__console_flush_and_unlock+0xb1/0x1d0
vprintk_emit+0x4c1/0x690
_printk+0xbe/0xf0
should_fail_ex+0x4ac/0x5e0
should_failslab+0xc2/0x120
__kmalloc_noprof+0xcd/0x680
ext4_find_extent+0x7f5/0xa00
ext4_ext_map_blocks+0x1cc/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/0x3f0
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc02d6e1c27
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:00007fc02ac57fa8 EFLAGS: 00000213 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007fc02d6e1c27
RDX: 0000000000000004 RSI: 00000000000001ff RDI: 0000000020000100
RBP: 00007fc02ac58040 R08: 0000000000000000 R09: ffffffffffffffff
R10: 0000000000000000 R11: 0000000000000213 R12: 0000000020000000
R13: 0000000020000100 R14: 00007fc02ac58000 R15: 0000000020013c00
irq event stamp: 1561
hardirqs last enabled at (1567): [] vprintk_emit+0x650/0x690
hardirqs last disabled at (1572): [] vprintk_emit+0x5e1/0x690
softirqs last enabled at (836): [] kernel_fpu_end+0x59/0x70
softirqs last disabled at (834): [] kernel_fpu_begin_mask+0x1b7/0x290
---[ end trace 0000000000000000 ]---
CPU: 0 UID: 0 PID: 7751 Comm: syz-executor.1 Tainted: G W 6.18.0-rc4-next-20251104 #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_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/0x3f0
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc02d6e1c27
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:00007fc02ac57fa8 EFLAGS: 00000213 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007fc02d6e1c27
RDX: 0000000000000004 RSI: 00000000000001ff RDI: 0000000020000100
RBP: 00007fc02ac58040 R08: 0000000000000000 R09: ffffffffffffffff
R10: 0000000000000000 R11: 0000000000000213 R12: 0000000020000000
R13: 0000000020000100 R14: 00007fc02ac58000 R15: 0000000020013c00
loop1: detected capacity change from 0 to 4
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 UID: 0 PID: 7883 Comm: syz-executor.7 Tainted: G W 6.18.0-rc4-next-20251104 #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
kmem_cache_alloc_noprof+0x80/0x690
anon_vma_fork+0xe6/0x630
dup_mmap+0x11f8/0x1d00
copy_process+0x6359/0x7420
kernel_clone+0xea/0x7f0