RBP: 00007f48f6222040 R08: 00007f48f6222040 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000
R13: 0000000020000100 R14: 00007f48f6222000 R15: 0000000020012c00
------------[ cut here ]------------
WARNING: kernel/printk/printk_ringbuffer.c:1278 at get_data+0x364/0x400, CPU#1: syz-executor.3/8358
Modules linked in:
CPU: 1 UID: 0 PID: 8358 Comm: syz-executor.3 Not tainted 6.18.0-rc2-next-20251024 #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 37 89 5b 00 e9 a9 fe ff ff e8 fd b6 1e 00 90 <0f> 0b 90 45 31 e4 e9 3b ff ff ff e8 ec b6 1e 00 90 0f 0b 90 45 31
RSP: 0018:ffff88806cf07ff8 EFLAGS: 00010006
RAX: 0000000000010100 RBX: ffff88806cf08110 RCX: ffffffff81555256
RDX: ffff88804ac38000 RSI: ffffffff81555423 RDI: 0000000000000006
RBP: ffff88806cf080d8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff85d30690
R13: 00003fffffffffff R14: 0000000000000000 R15: 0000000000000000
FS: 00007f48f6222700(0000) GS:ffff8880e54f4000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4cf2cee650 CR3: 0000000013d7c000 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+0x414/0x6d0
__hrtimer_run_queues+0x60f/0xac0
hrtimer_interrupt+0x369/0x830
__sysvec_apic_timer_interrupt+0xbb/0x330
sysvec_apic_timer_interrupt+0x34/0x80
asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__orc_find+0x6f/0xf0
Code: 77 4d 4c 89 e0 48 29 e8 48 89 c2 48 c1 e8 3f 48 c1 fa 02 48 01 d0 48 d1 f8 48 8d 5c 85 00 48 89 d8 48 c1 e8 03 42 0f b6 14 38 <48> 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 50 48 63 03 48 01
RSP: 0018:ffff88806cf08998 EFLAGS: 00000212
RAX: 1ffffffff0d3360b RBX: ffffffff8699b058 RCX: ffffffff84b7ae05
RDX: 0000000000000000 RSI: ffffffff86e6937c RDI: ffffffff8699b048
RBP: ffffffff8699b048 R08: ffffffff86e6937c R09: 0000000000000000
R10: 000000000003c79f R11: 00000000000c5286 R12: ffffffff8699b068
R13: ffffffff8699b048 R14: ffffffff8699b048 R15: dffffc0000000000
unwind_next_frame+0x2f9/0x2540
arch_stack_walk+0x86/0xf0
stack_trace_save+0x8e/0xc0
kasan_save_stack+0x24/0x50
kasan_record_aux_stack+0x89/0xa0
__call_rcu_common.constprop.0+0x70/0x960
kmem_cache_free+0x33d/0x540
rcu_core+0x7c8/0x1800
handle_softirqs+0x1b1/0x770
__irq_exit_rcu+0xc4/0x100
irq_exit_rcu+0x9/0x20
sysvec_call_function_single+0xa6/0xc0
asm_sysvec_call_function_single+0x1a/0x20
RIP: 0010:dump_stack_lvl+0x115/0x120
Code: fc ff ff 4c 89 e2 31 f6 31 ff e8 86 97 72 fc e8 81 8e 9c fc 48 89 ee 31 ff e8 87 58 bc fc e8 22 5d bc fc e8 cd b9 c4 fc fb 5b <5d> 41 5c e9 13 5d bc fc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffff88804ae07ac0 EFLAGS: 00000206
RAX: 00000000000004e1 RBX: ffffffff85f036e0 RCX: ffffffff817c66e6
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff84b7ae03
RBP: 0000000000000200 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff86646857 R11: 0000000000000001 R12: ffffffff855191e0
R13: ffffffff85f036f0 R14: 0000000000000000 R15: 0000000000000000
should_fail_ex+0x4d7/0x5e0
should_failslab+0xc2/0x120
__kmalloc_node_track_caller_noprof+0xc6/0x690
kmemdup_nul+0x3b/0xa0
vfs_parse_fs_qstr+0x112/0x1c0
vfs_parse_monolithic_sep+0x198/0x220
path_mount+0x6d0/0x2130
__x64_sys_mount+0x293/0x310
do_syscall_64+0xbf/0x390
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f48f8cae04a
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:00007f48f6221fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f48f8cae04a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f48f6222000
RBP: 00007f48f6222040 R08: 00007f48f6222040 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000
R13: 0000000020000100 R14: 00007f48f6222000 R15: 0000000020012c00
irq event stamp: 1283
hardirqs last enabled at (1282): [] _raw_spin_unlock_irqrestore+0x2c/0x50
hardirqs last disabled at (1283): [] sysvec_apic_timer_interrupt+0xf/0x80
softirqs last enabled at (1244): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (1251): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
loop0: detected capacity change from 0 to 5
EXT4-fs (loop0): bad geometry: block count 256 exceeds size of device (2 blocks)
loop4: detected capacity change from 0 to 8192
EXT4-fs (loop4): failed to parse options in superblock: Hí/‹¥¤Ë@;„ñ‚æ©eÜ' (Œ
EXT4-fs (loop4): ext4_check_descriptors: Block bitmap for group 0 not in group (block 0)!
EXT4-fs (loop4): group descriptors corrupted!
loop6: detected capacity change from 0 to 15
EXT4-fs: quotafile must be on filesystem root
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 UID: 0 PID: 8383 Comm: syz-executor.3 Tainted: G W 6.18.0-rc2-next-20251024 #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_cache_noprof+0x81/0x6b0
alloc_super+0x53/0xb20
sget_fc+0xfe/0xb80
get_tree_bdev_flags+0x1b8/0x620
vfs_get_tree+0x93/0x340
path_mount+0x720/0x2130
__x64_sys_mount+0x293/0x310
do_syscall_64+0xbf/0x390
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f48f8cae04a
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:00007f48f6221fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f48f8cae04a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f48f6222000
RBP: 00007f48f6222040 R08: 00007f48f6222040 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000
R13: 0000000020000100 R14: 00007f48f6222000 R15: 0000000020012c00
loop6: detected capacity change from 0 to 15
loop0: detected capacity change from 0 to 5
EXT4-fs: quotafile must be on filesystem root
loop4: detected capacity change from 0 to 8192
EXT4-fs (loop4): failed to parse options in superblock: Hí/‹¥¤Ë@;„ñ‚æ©eÜ' (Œ
EXT4-fs (loop4): ext4_check_descriptors: Block bitmap for group 0 not in group (block 0)!
EXT4-fs (loop4): group descriptors corrupted!
EXT4-fs (loop0): bad geometry: block count 256 exceeds size of device (2 blocks)
loop2: detected capacity change from 0 to 16
EXT4-fs (loop3): unable to read superblock
EXT4-fs (loop2): bad geometry: block count 512 exceeds size of device (2 blocks)
loop2: detected capacity change from 0 to 16
EXT4-fs (loop2): bad geometry: block count 512 exceeds size of device (2 blocks)
loop0: detected capacity change from 0 to 5
EXT4-fs (loop0): bad geometry: block count 256 exceeds size of device (2 blocks)
loop4: detected capacity change from 0 to 8192
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
EXT4-fs (loop4): failed to parse options in superblock: Hí/‹¥¤Ë@;„ñ‚æ©eÜ' (Œ
CPU: 1 UID: 0 PID: 8409 Comm: syz-executor.3 Tainted: G W 6.18.0-rc2-next-20251024 #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
security_sb_alloc+0xe3/0x140
alloc_super+0x1e9/0xb20
sget_fc+0xfe/0xb80
get_tree_bdev_flags+0x1b8/0x620
vfs_get_tree+0x93/0x340
path_mount+0x720/0x2130
__x64_sys_mount+0x293/0x310
do_syscall_64+0xbf/0x390
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f48f8cae04a
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:00007f48f6221fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f48f8cae04a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f48f6222000
RBP: 00007f48f6222040 R08: 00007f48f6222040 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000
R13: 0000000020000100 R14: 00007f48f6222000 R15: 0000000020012c00
EXT4-fs (loop4): ext4_check_descriptors: Inode table for group 0 not in group (block 0)!
EXT4-fs (loop4): group descriptors corrupted!
----------------
Code disassembly (best guess):
0: 77 4d ja 0x4f
2: 4c 89 e0 mov %r12,%rax
5: 48 29 e8 sub %rbp,%rax
8: 48 89 c2 mov %rax,%rdx
b: 48 c1 e8 3f shr $0x3f,%rax
f: 48 c1 fa 02 sar $0x2,%rdx
13: 48 01 d0 add %rdx,%rax
16: 48 d1 f8 sar %rax
19: 48 8d 5c 85 00 lea 0x0(%rbp,%rax,4),%rbx
1e: 48 89 d8 mov %rbx,%rax
21: 48 c1 e8 03 shr $0x3,%rax
25: 42 0f b6 14 38 movzbl (%rax,%r15,1),%edx
* 2a: 48 89 d8 mov %rbx,%rax <-- trapping instruction
2d: 83 e0 07 and $0x7,%eax
30: 83 c0 03 add $0x3,%eax
33: 38 d0 cmp %dl,%al
35: 7c 04 jl 0x3b
37: 84 d2 test %dl,%dl
39: 75 50 jne 0x8b
3b: 48 63 03 movslq (%rbx),%rax
3e: 48 rex.W
3f: 01 .byte 0x1