R10: 0000000000000001 R11: 0000000000000246 R12: 0000000008100000
R13: 0000000020000100 R14: 0000000000011000 R15: 0000000020000040
------------[ cut here ]------------
WARNING: kernel/printk/printk_ringbuffer.c:1278 at get_data+0x364/0x400, CPU#1: syz-executor.7/42786
Modules linked in:
CPU: 1 UID: 0 PID: 42786 Comm: syz-executor.7 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:ffff88806cf08720 EFLAGS: 00010046
RAX: 0000000000010000 RBX: ffff88806cf08838 RCX: ffffffff81555256
RDX: ffff8880551eb700 RSI: ffffffff81555423 RDI: 0000000000000006
RBP: ffff88806cf08800 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff85d30690
R13: 00003fffffffffff R14: 0000000000000000 R15: 0000000000000000
FS: 00007ffb790d1700(0000) GS:ffff8880e54f4000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffb790d0f78 CR3: 00000000515e4000 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: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:ffff888051887c40 EFLAGS: 00000202
RAX: 00000000000000d5 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
kmem_cache_alloc_lru_noprof+0x84/0x690
shmem_alloc_inode+0x27/0x50
alloc_inode+0x67/0x250
new_inode+0x1e/0x160
__shmem_get_inode+0x17c/0xe80
__shmem_file_setup+0x107/0x370
alloc_file+0x2ae/0x590
__x64_sys_memfd_create+0x193/0x280
do_syscall_64+0xbf/0x390
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ffb7bb5bb19
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:00007ffb790d0f48 EFLAGS: 00000246 ORIG_RAX: 000000000000013f
RAX: ffffffffffffffda RBX: 0000000020000500 RCX: 00007ffb7bb5bb19
RDX: 0000000000011000 RSI: 0000000000000000 RDI: 00007ffb7bbb50fb
RBP: 0000000000000001 R08: 0000000000008800 R09: ffffffffffffffff
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000008100000
R13: 0000000020000100 R14: 0000000000011000 R15: 0000000020000040
irq event stamp: 216
hardirqs last enabled at (215): [] irqentry_exit+0x3b/0x90
hardirqs last disabled at (216): [] sysvec_apic_timer_interrupt+0xf/0x80
softirqs last enabled at (208): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (169): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 UID: 0 PID: 43012 Comm: syz-executor.4 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
kmem_cache_alloc_noprof+0x80/0x690
skb_clone+0x191/0x400
raw6_local_deliver+0x373/0x900
ip6_protocol_deliver_rcu+0x1e7/0x1150
ip6_input_finish+0x1e1/0x4a0
ip6_input+0x10b/0x300
ip6_mc_input+0x256/0x5d0
ipv6_rcv+0x372/0x500
__netif_receive_skb_one_core+0x12d/0x1e0
__netif_receive_skb+0x1d/0x160
netif_receive_skb+0x122/0x730
tun_rx_batched.isra.0+0x45c/0x710
tun_get_user+0x1bf9/0x39e0
tun_chr_write_iter+0xd9/0x1e0
vfs_write+0xbe9/0x1150
ksys_write+0x121/0x240
do_syscall_64+0xbf/0x390
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f79e78d95ff
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 99 fd ff ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 cc fd ff ff 48
RSP: 002b:00007f79e4e9c150 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f79e7a39f60 RCX: 00007f79e78d95ff
RDX: 000000000000004e RSI: 00000000200003c0 RDI: 00000000000000f0
RBP: 00007f79e4e9c1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
R13: 00007ffef106509f R14: 00007f79e4e9c300 R15: 0000000000022000
loop7: detected capacity change from 0 to 136
ISOFS: unable to read i-node block
isofs_fill_super: get root inode failed
----------------
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 86 97 72 fc callq 0xfc729793
d: e8 81 8e 9c fc callq 0xfc9c8e93
12: 48 89 ee mov %rbp,%rsi
15: 31 ff xor %edi,%edi
17: e8 87 58 bc fc callq 0xfcbc58a3
1c: e8 22 5d bc fc callq 0xfcbc5d43
21: e8 cd b9 c4 fc callq 0xfcc4b9f3
26: fb sti
27: 5b pop %rbx
* 28: 5d pop %rbp <-- trapping instruction
29: 41 5c pop %r12
2b: e9 13 5d bc fc jmpq 0xfcbc5d43
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