RBP: 00007faade81f1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffc493baeff R14: 00007faade81f300 R15: 0000000000022000
------------[ cut here ]------------
WARNING: kernel/printk/printk_ringbuffer.c:1278 at get_data+0x364/0x400, CPU#1: syz-executor.4/23056
Modules linked in:
CPU: 1 UID: 0 PID: 23056 Comm: syz-executor.4 Not tainted 6.18.0-rc4-next-20251103 #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 c7 ed 5b 00 e9 a9 fe ff ff e8 cd f1 1e 00 90 <0f> 0b 90 45 31 e4 e9 3b ff ff ff e8 bc f1 1e 00 90 0f 0b 90 45 31
RSP: 0018:ffff88806cf086b8 EFLAGS: 00010046
RAX: 0000000000010000 RBX: ffff88806cf087d0 RCX: ffffffff81558b86
RDX: ffff888015d01bc0 RSI: ffffffff81558d53 RDI: 0000000000000006
RBP: ffff88806cf08798 R08: 000000000000107b R09: 0000022911cf4018
R10: 0000000000000000 R11: 00005a108200001d R12: ffffffff85d2e130
R13: 00003fffffffffff R14: 0000000000000000 R15: 0000000000000000
FS: 00007faade81f700(0000) GS:ffff8880e54a8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007faade81ef78 CR3: 000000001e168000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
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/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 f6 25 70 fc e8 31 52 9a fc 48 89 ee 31 ff e8 87 5c ba fc e8 22 61 ba fc e8 cd cb c2 fc fb 5b <5d> 41 5c e9 13 61 ba fc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffff88803dd07310 EFLAGS: 00000206
RAX: 0000000000000263 RBX: ffffffff85f01e80 RCX: 0000000000000040
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff84ba1e03
RBP: 0000000000000200 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff86647f57 R11: 0000000000000001 R12: ffffffff8551ffe0
R13: ffffffff85f01e90 R14: 0000000000000000 R15: 0000000000000000
should_fail_ex+0x4d7/0x5e0
should_failslab+0xc2/0x120
__kmalloc_noprof+0xcd/0x680
___neigh_create+0x903/0x2670
ip6_finish_output2+0x9a1/0x1780
__ip6_finish_output+0x5d5/0xd10
ip6_output+0x24d/0x700
ip6_local_out+0xd5/0x4d0
ip6_send_skb+0x117/0x460
udp_v6_send_skb+0x7d9/0x1620
udp_v6_push_pending_frames+0x11d/0x1e0
udpv6_sendmsg+0x18ef/0x2ad0
inet6_sendmsg+0x109/0x150
____sys_sendmsg+0x7b2/0xc20
___sys_sendmsg+0x10f/0x1b0
__sys_sendmmsg+0x1f5/0x420
__x64_sys_sendmmsg+0x9d/0x110
do_syscall_64+0xbf/0x3f0
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faae12a9b19
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:00007faade81f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007faae13bcf60 RCX: 00007faae12a9b19
RDX: 0000000000000003 RSI: 0000000020006680 RDI: 0000000000000004
RBP: 00007faade81f1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffc493baeff R14: 00007faade81f300 R15: 0000000000022000
irq event stamp: 612
hardirqs last enabled at (611): [] dump_stack_lvl+0x113/0x120
hardirqs last disabled at (612): [] sysvec_apic_timer_interrupt+0xf/0x80
softirqs last enabled at (606): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (571): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 0
CPU: 1 UID: 0 PID: 23163 Comm: syz-executor.1 Tainted: G W 6.18.0-rc4-next-20251103 #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
_copy_to_user+0x32/0xd0
simple_read_from_buffer+0xe0/0x180
proc_fail_nth_read+0x18a/0x240
vfs_read+0x1eb/0xc70
ksys_read+0x121/0x240
do_syscall_64+0xbf/0x3f0
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc62e31269c
Code: ec 28 48 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 fc ff ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 48 89 44 24 08 e8 2f fd ff ff 48
RSP: 002b:00007fc62b8d5170 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000000000000003c RCX: 00007fc62e31269c
RDX: 000000000000000f RSI: 00007fc62b8d51e0 RDI: 0000000000000003
RBP: 00007fc62b8d51d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffde20620ff R14: 00007fc62b8d5300 R15: 0000000000022000
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 UID: 0 PID: 23303 Comm: syz-executor.4 Tainted: G W 6.18.0-rc4-next-20251103 #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
ndisc_alloc_skb+0xd7/0x500
ndisc_ns_create+0x15d/0x7e0
ndisc_send_ns+0x8e/0x130
ndisc_solicit+0x2e1/0x490
neigh_probe+0xcd/0x110
__neigh_event_send+0xaf3/0x14c0
neigh_resolve_output+0x50c/0x7f0
ip6_finish_output2+0x960/0x1780
__ip6_finish_output+0x5d5/0xd10
ip6_output+0x24d/0x700
ip6_local_out+0xd5/0x4d0
ip6_send_skb+0x117/0x460
udp_v6_send_skb+0x7d9/0x1620
udp_v6_push_pending_frames+0x11d/0x1e0
udpv6_sendmsg+0x18ef/0x2ad0
inet6_sendmsg+0x109/0x150
____sys_sendmsg+0x7b2/0xc20
___sys_sendmsg+0x10f/0x1b0
__sys_sendmmsg+0x1f5/0x420
__x64_sys_sendmmsg+0x9d/0x110
do_syscall_64+0xbf/0x3f0
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faae12a9b19
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:00007faade81f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007faae13bcf60 RCX: 00007faae12a9b19
RDX: 0000000000000003 RSI: 0000000020006680 RDI: 0000000000000004
RBP: 00007faade81f1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffc493baeff R14: 00007faade81f300 R15: 0000000000022000
----------------
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 f6 25 70 fc callq 0xfc702603
d: e8 31 52 9a fc callq 0xfc9a5243
12: 48 89 ee mov %rbp,%rsi
15: 31 ff xor %edi,%edi
17: e8 87 5c ba fc callq 0xfcba5ca3
1c: e8 22 61 ba fc callq 0xfcba6143
21: e8 cd cb c2 fc callq 0xfcc2cbf3
26: fb sti
27: 5b pop %rbx
* 28: 5d pop %rbp <-- trapping instruction
29: 41 5c pop %r12
2b: e9 13 61 ba fc jmpq 0xfcba6143
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