RBP: 00007f6e0d4711d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007fffb3b4db3f R14: 00007f6e0d471300 R15: 0000000000022000
------------[ cut here ]------------
WARNING: kernel/printk/printk_ringbuffer.c:1278 at get_data+0x364/0x400, CPU#0: syz-executor.4/26681
Modules linked in:
CPU: 0 UID: 0 PID: 26681 Comm: syz-executor.4 Not tainted 6.18.0-rc2-next-20251027 #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 47 91 5b 00 e9 a9 fe ff ff e8 3d b7 1e 00 90 <0f> 0b 90 45 31 e4 e9 3b ff ff ff e8 2c b7 1e 00 90 0f 0b 90 45 31
RSP: 0000:ffff88806ce08720 EFLAGS: 00010046
RAX: 0000000080010001 RBX: ffff88806ce08838 RCX: ffffffff81555756
RDX: ffff888050be1b80 RSI: ffffffff81555923 RDI: 0000000000000006
RBP: ffff88806ce08800 R08: 000000000000112c R09: 0000011ac8b7aad7
R10: 0000000000000000 R11: 0000683882000008 R12: ffffffff85d30650
R13: 00003fffffffffff R14: 0000000000000000 R15: 0000000000000000
FS: 0000555562307400(0000) GS:ffff8880e53f4000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f69e7d8fca0 CR3: 000000005694d000 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+0x6b/0x80
asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:css_rstat_updated+0x170/0x4d0
Code: 0f 85 0b 03 00 00 4c 8d 04 ed 80 ec a7 85 48 8b 53 20 48 b8 00 00 00 00 00 fc ff df 4c 89 c1 48 c1 e9 03 49 89 d7 80 3c 01 00 <0f> 85 c2 02 00 00 4c 03 3c ed 80 ec a7 85 48 b8 00 00 00 00 00 fc
RSP: 0000:ffff888059687d20 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffff8880165ae880 RCX: 1ffffffff0b4fd90
RDX: 0000607f1a834088 RSI: ffffffff816d215d RDI: ffff8880165ae8a0
RBP: 0000000000000000 R08: ffffffff85a7ec80 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 1ffff1100b2d0fa6
R13: ffff8880165ae888 R14: 0000000000000001 R15: 0000607f1a834088
count_memcg_events+0x1a8/0x420
count_memcg_events_mm.constprop.0+0xca/0x2a0
handle_mm_fault+0x4c4/0x750
do_user_addr_fault+0x844/0x1760
exc_page_fault+0xb0/0x180
asm_exc_page_fault+0x26/0x30
RIP: 0033:0x7f69e7d8fca0
Code: 66 0f eb c2 66 0f d7 c8 48 c1 e1 30 48 09 c8 89 f9 28 d1 48 d3 e8 48 85 c0 0f 85 4b ff ff ff e9 a0 fe ff ff 66 0f 1f 44 00 00 <66> 0f 6e ce 89 f8 25 ff 0f 00 00 66 0f 60 c9 3d c0 0f 00 00 66 0f
RSP: 002b:00007ffef9a71a48 EFLAGS: 00010246
RAX: 00007ffef9a72160 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 00007ffef9a72140 RSI: 0000000000000025 RDI: 00007f69e7dfae8f
RBP: 00007ffef9a71fa0 R08: 0000000000000000 R09: 00007ffef9a720b0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffef9a71fc0
R13: 00007f69e7dfae8f R14: 00007ffef9a72140 R15: 00000000fbad8001
irq event stamp: 122
hardirqs last enabled at (121): [] _raw_spin_unlock_irqrestore+0x2c/0x50
hardirqs last disabled at (122): [] sysvec_apic_timer_interrupt+0xf/0x80
softirqs last enabled at (0): [] copy_process+0x1ee7/0x7410
softirqs last disabled at (0): [<0000000000000000>] 0x0
---[ end trace 0000000000000000 ]---
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 UID: 0 PID: 26814 Comm: syz-executor.4 Tainted: G W 6.18.0-rc2-next-20251027 #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
__kvmalloc_node_noprof+0x11f/0x770
alloc_fdtable+0x163/0x2d0
dup_fd+0x6ef/0xa80
copy_process+0x21b4/0x7410
kernel_clone+0xea/0x7f0
__do_sys_clone3+0x1f5/0x280
do_syscall_64+0xbf/0x390
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f69e7da0b19
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:00007f69e5316188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007f69e7eb3f60 RCX: 00007f69e7da0b19
RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020005880
RBP: 00007f69e53161d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffef9a71fcf R14: 00007f69e5316300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: 0f 85 0b 03 00 00 jne 0x311
6: 4c 8d 04 ed 80 ec a7 lea -0x7a581380(,%rbp,8),%r8
d: 85
e: 48 8b 53 20 mov 0x20(%rbx),%rdx
12: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
19: fc ff df
1c: 4c 89 c1 mov %r8,%rcx
1f: 48 c1 e9 03 shr $0x3,%rcx
23: 49 89 d7 mov %rdx,%r15
26: 80 3c 01 00 cmpb $0x0,(%rcx,%rax,1)
* 2a: 0f 85 c2 02 00 00 jne 0x2f2 <-- trapping instruction
30: 4c 03 3c ed 80 ec a7 add -0x7a581380(,%rbp,8),%r15
37: 85
38: 48 rex.W
39: b8 00 00 00 00 mov $0x0,%eax
3e: 00 fc add %bh,%ah