RBP: 00007f88cce0f040 R08: 00007f88cce0f040 R09: 0000000020000040
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000040
R13: 0000000000000000 R14: 00007f88cce0f000 R15: 00000000200015c0
------------[ cut here ]------------
WARNING: kernel/printk/printk_ringbuffer.c:1278 at get_data+0x364/0x400, CPU#1: syz-executor.7/6618
Modules linked in:
CPU: 1 UID: 0 PID: 6618 Comm: syz-executor.7 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: ffff88804957d340 RSI: ffffffff8155a4e3 RDI: 0000000000000006
RBP: ffff88806cf08798 R08: 00000000000010ce R09: 000000a468be46d2
R10: 0000000000000000 R11: 000019da82000041 R12: ffffffff85d2e590
R13: 00003fffffffffff R14: 0000000000000000 R15: 0000000000000000
FS: 00007f88cce0f700(0000) GS:ffff8880e54a5000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f88cce10000 CR3: 0000000016406000 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:ffff888049297d20 EFLAGS: 00000202
RAX: 000000000000032f RBX: ffffffff85f022c0 RCX: ffffffff817d04f6
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
getname_flags.part.0+0x48/0x540
getname_flags+0x95/0xe0
user_path_at+0x27/0x90
__x64_sys_mount+0x1fb/0x310
do_syscall_64+0xbf/0x430
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f88cf89b04a
Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 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:00007f88cce0efa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00000000200002c0 RCX: 00007f88cf89b04a
RDX: 0000000020000040 RSI: 0000000000000000 RDI: 00007f88cce0f000
RBP: 00007f88cce0f040 R08: 00007f88cce0f040 R09: 0000000020000040
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000040
R13: 0000000000000000 R14: 00007f88cce0f000 R15: 00000000200015c0
irq event stamp: 816
hardirqs last enabled at (815): [] dump_stack_lvl+0x113/0x120
hardirqs last disabled at (816): [] sysvec_apic_timer_interrupt+0xf/0x80
softirqs last enabled at (810): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (721): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
loop2: detected capacity change from 0 to 512
EXT4-fs (loop2): ext4_check_descriptors: Block bitmap for group 0 not in group (block 0)!
EXT4-fs (loop2): group descriptors corrupted!
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 UID: 0 PID: 6639 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_node_noprof+0x87/0x6b0
__alloc_skb+0x2ab/0x370
alloc_skb_with_frags+0x8f/0x7c0
sock_alloc_send_pskb+0x7cb/0x950
unix_dgram_sendmsg+0x38e/0x1710
____sys_sendmsg+0xa67/0xc20
___sys_sendmsg+0x10f/0x1b0
__sys_sendmmsg+0x1f5/0x420
__x64_sys_sendmmsg+0x9d/0x110
do_syscall_64+0xbf/0x430
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6df1778b19
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:00007f6deecee188 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f6df188bf60 RCX: 00007f6df1778b19
RDX: 0000000000000002 RSI: 0000000020000980 RDI: 0000000000000005
RBP: 00007f6deecee1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffc7d57034f R14: 00007f6deecee300 R15: 0000000000022000
loop2: detected capacity change from 0 to 512
EXT4-fs (loop2): ext4_check_descriptors: Block bitmap for group 0 not in group (block 0)!
EXT4-fs (loop2): group descriptors corrupted!
----------------
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