RBP: 00007f57afd46040 R08: 0000000000000000 R09: ffffffffffffffff
R10: 0000000000000000 R11: 0000000000000213 R12: 0000000020000000
R13: 0000000020000100 R14: 00007f57afd46000 R15: 0000000020000680
------------[ cut here ]------------
WARNING: kernel/printk/printk_ringbuffer.c:1278 at get_data+0x364/0x400, CPU#1: syz-executor.3/19847
Modules linked in:
CPU: 1 UID: 0 PID: 19847 Comm: syz-executor.3 Not tainted 6.18.0-rc4-next-20251105 #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 a7 01 5c 00 e9 a9 fe ff ff e8 0d f8 1e 00 90 <0f> 0b 90 45 31 e4 e9 3b ff ff ff e8 fc f7 1e 00 90 0f 0b 90 45 31
RSP: 0018:ffff88806cf086b8 EFLAGS: 00010046
RAX: 0000000000010000 RBX: ffff88806cf087d0 RCX: ffffffff8155a316
RDX: ffff88804bcd8000 RSI: ffffffff8155a4e3 RDI: 0000000000000006
RBP: ffff88806cf08798 R08: 0000000000000fe8 R09: 000000cf3dbe9688
R10: 0000000000000000 R11: 00004d8782000019 R12: ffffffff85d2e590
R13: 00003fffffffffff R14: 0000000000000000 R15: 0000000000000000
FS: 00007f57afd46700(0000) GS:ffff8880e54a5000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000ffffffff CR3: 0000000016892000 CR4: 0000000000350ef0
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
wake_up_klogd_work_func+0x17c/0x1e0
irq_work_single+0x128/0x260
irq_work_run_list+0x91/0xc0
update_process_times+0x12f/0x210
tick_nohz_handler+0x4ff/0x8c0
__hrtimer_run_queues+0x60f/0xab0
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 76 c3 6f fc e8 01 06 9a fc 48 89 ee 31 ff e8 97 16 ba fc e8 32 1b ba fc e8 1d 84 c2 fc fb 5b <5d> 41 5c e9 23 1b ba fc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffff88804d70f9c0 EFLAGS: 00000202
RAX: 00000000000001f1 RBX: ffffffff85f022c0 RCX: 0000000000000040
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff84ba81c3
RBP: 0000000000000200 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff86648957 R11: 0000000000000001 R12: ffffffff85520520
R13: ffffffff85f022d0 R14: 0000000000000000 R15: 0000000000000000
should_fail_ex+0x4d7/0x5e0
should_failslab+0xc2/0x120
kmem_cache_alloc_noprof+0x80/0x690
security_inode_alloc+0x3e/0x130
inode_init_always_gfp+0xc9d/0xff0
alloc_inode+0x8d/0x250
new_inode+0x1e/0x160
__ext4_new_inode+0x35d/0x4d60
ext4_mkdir+0x331/0xb30
vfs_mkdir+0x59a/0x8d0
do_mkdirat+0x19f/0x3d0
__x64_sys_mkdir+0xf3/0x140
do_syscall_64+0xbf/0x430
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f57b27cfc27
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:00007f57afd45fa8 EFLAGS: 00000213 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f57b27cfc27
RDX: 0000000000000005 RSI: 00000000000001ff RDI: 0000000020000100
RBP: 00007f57afd46040 R08: 0000000000000000 R09: ffffffffffffffff
R10: 0000000000000000 R11: 0000000000000213 R12: 0000000020000000
R13: 0000000020000100 R14: 00007f57afd46000 R15: 0000000020000680
irq event stamp: 498
hardirqs last enabled at (497): [] dump_stack_lvl+0x113/0x120
hardirqs last disabled at (498): [] sysvec_apic_timer_interrupt+0xf/0x80
softirqs last enabled at (492): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (463): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
loop5: detected capacity change from 0 to 512
EXT4-fs error (device loop5): __ext4_fill_super:5512: inode #2: comm syz-executor.5: iget: special inode unallocated
EXT4-fs (loop5): get root inode failed
EXT4-fs (loop5): mount failed
FAT-fs (loop3): unable to read boot sector
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 UID: 0 PID: 20082 Comm: syz-executor.3 Tainted: G W 6.18.0-rc4-next-20251105 #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
jbd2__journal_start+0x193/0x6b0
__ext4_journal_start_sb+0x325/0x5d0
__ext4_new_inode+0x2cbe/0x4d60
ext4_mkdir+0x331/0xb30
vfs_mkdir+0x59a/0x8d0
do_mkdirat+0x19f/0x3d0
__x64_sys_mkdir+0xf3/0x140
do_syscall_64+0xbf/0x430
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f57b27cfc27
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:00007f57afd45fa8 EFLAGS: 00000213 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f57b27cfc27
RDX: 0000000000000005 RSI: 00000000000001ff RDI: 0000000020000100
RBP: 00007f57afd46040 R08: 0000000000000000 R09: ffffffffffffffff
R10: 0000000000000000 R11: 0000000000000213 R12: 0000000020000000
R13: 0000000020000100 R14: 00007f57afd46000 R15: 0000000020000680
EXT4-fs error (device sda) in __ext4_new_inode:1086: Out of memory
loop5: detected capacity change from 0 to 512
netlink: 192 bytes leftover after parsing attributes in process `syz-executor.4'.
EXT4-fs error (device loop5): __ext4_fill_super:5512: inode #2: comm syz-executor.5: iget: special inode unallocated
EXT4-fs (loop5): get root inode failed
EXT4-fs (loop5): mount failed
loop5: detected capacity change from 0 to 512
EXT4-fs error (device loop5): __ext4_fill_super:5512: inode #2: comm syz-executor.5: iget: special inode unallocated
EXT4-fs (loop5): get root inode failed
EXT4-fs (loop5): mount failed
FAT-fs (loop3): unable to read boot sector
----------------
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 76 c3 6f fc callq 0xfc6fc383
d: e8 01 06 9a fc callq 0xfc9a0613
12: 48 89 ee mov %rbp,%rsi
15: 31 ff xor %edi,%edi
17: e8 97 16 ba fc callq 0xfcba16b3
1c: e8 32 1b ba fc callq 0xfcba1b53
21: e8 1d 84 c2 fc callq 0xfcc28443
26: fb sti
27: 5b pop %rbx
* 28: 5d pop %rbp <-- trapping instruction
29: 41 5c pop %r12
2b: e9 23 1b ba fc jmpq 0xfcba1b53
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