RBP: 00007f8786d4f1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffdfcd0132f R14: 00007f8786d4f300 R15: 0000000000022000
------------[ cut here ]------------
WARNING: kernel/printk/printk_ringbuffer.c:1278 at get_data+0x364/0x400, CPU#0: syz-executor.3/16239
Modules linked in:
CPU: 0 UID: 0 PID: 16239 Comm: syz-executor.3 Not tainted 6.18.0-rc3-next-20251028 #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 95 5b 00 e9 a9 fe ff ff e8 3d bb 1e 00 90 <0f> 0b 90 45 31 e4 e9 3b ff ff ff e8 2c bb 1e 00 90 0f 0b 90 45 31
RSP: 0018:ffff88806ce08720 EFLAGS: 00010046
RAX: 0000000000010000 RBX: ffff88806ce08838 RCX: ffffffff81555756
RDX: ffff88800a751b80 RSI: ffffffff81555923 RDI: 0000000000000006
RBP: ffff88806ce08800 R08: 00000000000010e9 R09: 00000263d2c1a115
R10: 0000000000000000 R11: 00003f6f82000019 R12: ffffffff85d30650
R13: 00003fffffffffff R14: 0000000000000000 R15: 0000000000000000
FS: 00007f8786d4f700(0000) GS:ffff8880e53f4000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d421000 CR3: 00000000569d7000 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 87 72 fc e8 91 80 9c fc 48 89 ee 31 ff e8 c7 51 bc fc e8 62 56 bc fc e8 0d b3 c4 fc fb 5b <5d> 41 5c e9 53 56 bc fc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffff8880525cfa40 EFLAGS: 00000206
RAX: 000000000000018b RBX: ffffffff85f03720 RCX: 0000000000000040
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff84b7be03
RBP: 0000000000000200 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff86646857 R11: 0000000000000001 R12: ffffffff855192e0
R13: ffffffff85f03730 R14: 0000000000000000 R15: 0000000000000000
should_fail_ex+0x4d7/0x5e0
should_failslab+0xc2/0x120
__kvmalloc_node_noprof+0x11f/0x770
seq_read_iter+0x82f/0x1320
seq_read+0x375/0x540
vfs_read+0x1eb/0xc70
ksys_read+0x121/0x240
do_syscall_64+0xbf/0x390
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f87897d9b19
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:00007f8786d4f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f87898ecf60 RCX: 00007f87897d9b19
RDX: 00007ffffffff000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007f8786d4f1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffdfcd0132f R14: 00007f8786d4f300 R15: 0000000000022000
irq event stamp: 396
hardirqs last enabled at (395): [] dump_stack_lvl+0x113/0x120
hardirqs last disabled at (396): [] sysvec_apic_timer_interrupt+0xf/0x80
softirqs last enabled at (390): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (361): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 UID: 0 PID: 16245 Comm: syz-executor.6 Tainted: G W 6.18.0-rc3-next-20251028 #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
seq_read_iter+0x82f/0x1320
seq_read+0x375/0x540
proc_reg_read+0x22e/0x310
vfs_read+0x1eb/0xc70
__x64_sys_pread64+0x1f1/0x260
do_syscall_64+0xbf/0x390
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faf7e375b19
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:00007faf7b8eb188 EFLAGS: 00000246 ORIG_RAX: 0000000000000011
RAX: ffffffffffffffda RBX: 00007faf7e488f60 RCX: 00007faf7e375b19
RDX: 00000000000000dc RSI: 00000000200000c0 RDI: 0000000000000004
RBP: 00007faf7b8eb1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffdb6b23eef R14: 00007faf7b8eb300 R15: 0000000000022000
FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 0
CPU: 0 UID: 0 PID: 16249 Comm: syz-executor.2 Tainted: G W 6.18.0-rc3-next-20251028 #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_from_user+0x30/0xd0
copy_msghdr_from_user+0x88/0x150
___sys_sendmsg+0xdc/0x1b0
__sys_sendmmsg+0x1f5/0x420
__x64_sys_sendmmsg+0x9d/0x110
do_syscall_64+0xbf/0x390
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2fd6209b19
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:00007f2fd377f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f2fd631cf60 RCX: 00007f2fd6209b19
RDX: 0000000000000007 RSI: 0000000020004dc0 RDI: 0000000000000003
RBP: 00007f2fd377f1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000044894 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffdfc60441f R14: 00007f2fd377f300 R15: 0000000000022000
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 0
CPU: 1 UID: 0 PID: 16258 Comm: syz-executor.1 Tainted: G W 6.18.0-rc3-next-20251028 #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_fail_alloc_page+0xe0/0x110
prepare_alloc_pages+0x1eb/0x550
__alloc_frozen_pages_noprof+0x17f/0x1f20
alloc_pages_mpol+0xed/0x340
alloc_pages_noprof+0x9d/0x180
get_free_pages_noprof+0x10/0xb0
vcs_write+0x11c/0xc50
vfs_write+0x2b7/0x1150
ksys_write+0x121/0x240
do_syscall_64+0xbf/0x390
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3988a9eb19
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:00007f3986014188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f3988bb1f60 RCX: 00007f3988a9eb19
RDX: 0000000000000012 RSI: 0000000020000100 RDI: 0000000000000003
RBP: 00007f39860141d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffecd03153f R14: 00007f3986014300 R15: 0000000000022000
FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 0
CPU: 1 UID: 0 PID: 16283 Comm: syz-executor.2 Tainted: G W 6.18.0-rc3-next-20251028 #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/0x390
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2fd61bc69c
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:00007f2fd377f170 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 00007f2fd61bc69c
RDX: 000000000000000f RSI: 00007f2fd377f1e0 RDI: 0000000000000004
RBP: 00007f2fd377f1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000044894 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffdfc60441f R14: 00007f2fd377f300 R15: 0000000000022000
FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 0
CPU: 1 UID: 0 PID: 16284 Comm: syz-executor.1 Tainted: G W 6.18.0-rc3-next-20251028 #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_from_user+0x30/0xd0
vcs_write+0x2de/0xc50
vfs_write+0x2b7/0x1150
ksys_write+0x121/0x240
do_syscall_64+0xbf/0x390
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3988a9eb19
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:00007f3986014188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f3988bb1f60 RCX: 00007f3988a9eb19
RDX: 0000000000000012 RSI: 0000000020000100 RDI: 0000000000000003
RBP: 00007f39860141d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffecd03153f R14: 00007f3986014300 R15: 0000000000022000
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 UID: 0 PID: 16290 Comm: syz-executor.3 Tainted: G W 6.18.0-rc3-next-20251028 #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
proc_cgroup_show+0x55/0x9a0
proc_single_show+0x124/0x1f0
seq_read_iter+0x513/0x1320
seq_read+0x375/0x540
vfs_read+0x1eb/0xc70
ksys_read+0x121/0x240
do_syscall_64+0xbf/0x390
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f87897d9b19
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:00007f8786d4f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f87898ecf60 RCX: 00007f87897d9b19
RDX: 00007ffffffff000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007f8786d4f1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffdfcd0132f R14: 00007f8786d4f300 R15: 0000000000022000
FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 0
CPU: 1 UID: 0 PID: 16291 Comm: syz-executor.6 Tainted: G W 6.18.0-rc3-next-20251028 #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_iter+0x578/0x1660
seq_read_iter+0xdd2/0x1320
seq_read+0x375/0x540
proc_reg_read+0x22e/0x310
vfs_read+0x1eb/0xc70
__x64_sys_pread64+0x1f1/0x260
do_syscall_64+0xbf/0x390
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faf7e375b19
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:00007faf7b8eb188 EFLAGS: 00000246 ORIG_RAX: 0000000000000011
RAX: ffffffffffffffda RBX: 00007faf7e488f60 RCX: 00007faf7e375b19
RDX: 00000000000000dc RSI: 00000000200000c0 RDI: 0000000000000004
RBP: 00007faf7b8eb1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffdb6b23eef R14: 00007faf7b8eb300 R15: 0000000000022000
FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 0
CPU: 1 UID: 0 PID: 16304 Comm: syz-executor.6 Tainted: G W 6.18.0-rc3-next-20251028 #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
----------------
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 87 72 fc callq 0xfc728793
d: e8 91 80 9c fc callq 0xfc9c80a3
12: 48 89 ee mov %rbp,%rsi
15: 31 ff xor %edi,%edi
17: e8 c7 51 bc fc callq 0xfcbc51e3
1c: e8 62 56 bc fc callq 0xfcbc5683
21: e8 0d b3 c4 fc callq 0xfcc4b333
26: fb sti
27: 5b pop %rbx
* 28: 5d pop %rbp <-- trapping instruction
29: 41 5c pop %r12
2b: e9 53 56 bc fc jmpq 0xfcbc5683
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