RBP: 00007f45ef1791d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007fff014297bf R14: 00007f45ef179300 R15: 0000000000022000
------------[ cut here ]------------
WARNING: kernel/printk/printk_ringbuffer.c:1278 at get_data+0x364/0x400, CPU#0: syz-executor.4/17084
Modules linked in:
CPU: 0 UID: 0 PID: 17084 Comm: syz-executor.4 Not tainted 6.18.0-rc4-next-20251104 #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 d7 f1 5b 00 e9 a9 fe ff ff e8 3d f2 1e 00 90 <0f> 0b 90 45 31 e4 e9 3b ff ff ff e8 2c f2 1e 00 90 0f 0b 90 45 31
RSP: 0018:ffff88806ce086b8 EFLAGS: 00010046
RAX: 0000000000010000 RBX: ffff88806ce087d0 RCX: ffffffff81559466
RDX: ffff88804b03d340 RSI: ffffffff81559633 RDI: 0000000000000006
RBP: ffff88806ce08798 R08: 000000000000114d R09: 000002bd53533f6b
R10: 0000000000000000 R11: 000042bc82000025 R12: ffffffff85d2e3d0
R13: 00003fffffffffff R14: 0000000000000000 R15: 0000000000000000
FS: 00007f45ef179700(0000) GS:ffff8880e53a8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020002000 CR3: 0000000016106000 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/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 f5 6f fc e8 11 2b 9a fc 48 89 ee 31 ff e8 d7 35 ba fc e8 72 3a ba fc e8 1d a5 c2 fc fb 5b <5d> 41 5c e9 63 3a ba fc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffff888013f071e0 EFLAGS: 00000206
RAX: 00000000000001f9 RBX: ffffffff8609e800 RCX: ffffffff817cf236
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff84ba4e03
RBP: 0000000000000200 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff86648157 R11: 0000000000000001 R12: ffffffff855203a0
R13: ffffffff8609e810 R14: 0000000000000000 R15: 0000000000000000
should_fail_ex+0x4d7/0x5e0
_copy_from_user+0x30/0xd0
csum_and_copy_from_iter_full+0x1fb/0x1f30
ip_generic_getfrag+0x181/0x270
__ip_append_data+0x17ab/0x40d0
ip_make_skb+0x22b/0x2a0
udp_sendmsg+0x1647/0x22c0
inet_sendmsg+0x109/0x150
____sys_sendmsg+0x947/0xc20
___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: 0033:0x7f45f1c03b19
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:00007f45ef179188 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f45f1d16f60 RCX: 00007f45f1c03b19
RDX: 0000000000000001 RSI: 0000000020000640 RDI: 0000000000000003
RBP: 00007f45ef1791d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007fff014297bf R14: 00007f45ef179300 R15: 0000000000022000
irq event stamp: 506
hardirqs last enabled at (505): [] dump_stack_lvl+0x113/0x120
hardirqs last disabled at (506): [] sysvec_apic_timer_interrupt+0xf/0x80
softirqs last enabled at (500): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (491): [] __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: 17094 Comm: syz-executor.5 Tainted: G W 6.18.0-rc4-next-20251104 #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_lru_noprof+0x84/0x690
__d_alloc+0x31/0xa10
d_alloc+0x4a/0x1e0
lookup_one_qstr_excl+0x174/0x270
filename_create+0x1ca/0x480
do_mkdirat+0x9a/0x3d0
__x64_sys_mkdir+0xf3/0x140
do_syscall_64+0xbf/0x3f0
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f93f4a08c27
Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 53 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:00007f93f1f7efa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f93f4a08c27
RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000000020000080
RBP: 00007f93f1f7f040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000180
R13: 0000000020000080 R14: 00007f93f1f7f000 R15: 0000000020000040
FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 0
CPU: 1 UID: 0 PID: 17099 Comm: syz-executor.0 Tainted: G W 6.18.0-rc4-next-20251104 #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: 0033:0x7f4f8603369c
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:00007f4f835f6170 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 00007f4f8603369c
RDX: 000000000000000f RSI: 00007f4f835f61e0 RDI: 0000000000000004
RBP: 00007f4f835f61d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000044894 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffc7409460f R14: 00007f4f835f6300 R15: 0000000000022000
No source specified
No source specified
No source specified
----------------
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 f5 6f fc callq 0xfc6ff603
d: e8 11 2b 9a fc callq 0xfc9a2b23
12: 48 89 ee mov %rbp,%rsi
15: 31 ff xor %edi,%edi
17: e8 d7 35 ba fc callq 0xfcba35f3
1c: e8 72 3a ba fc callq 0xfcba3a93
21: e8 1d a5 c2 fc callq 0xfcc2a543
26: fb sti
27: 5b pop %rbx
* 28: 5d pop %rbp <-- trapping instruction
29: 41 5c pop %r12
2b: e9 63 3a ba fc jmpq 0xfcba3a93
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