RBP: 0000000000000003 R08: 0000000000000800 R09: ffffffffffffffff
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000008100000
R13: 0000000020000100 R14: 0000000000040000 R15: 0000000020013800
------------[ cut here ]------------
WARNING: kernel/printk/printk_ringbuffer.c:1278 at get_data+0x364/0x400, CPU#1: syz-executor.2/11184
Modules linked in:
CPU: 1 UID: 0 PID: 11184 Comm: syz-executor.2 Not tainted 6.18.0-rc3-next-20251029 #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 9e 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:ffff88806cf08720 EFLAGS: 00010046
RAX: 0000000000010000 RBX: ffff88806cf08838 RCX: ffffffff815555d6
RDX: ffff88804d35d280 RSI: ffffffff815557a3 RDI: 0000000000000006
RBP: ffff88806cf08800 R08: 0000000000000ea3 R09: 000001136685ff25
R10: 0000000000000000 R11: 00002bb082000008 R12: ffffffff85d30650
R13: 00003fffffffffff R14: 0000000000000000 R15: 0000000000000000
FS: 00007f04ed418700(0000) GS:ffff8880e54f1000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f04ed417f78 CR3: 000000004ca08000 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 67 72 fc e8 11 5f 9c fc 48 89 ee 31 ff e8 47 30 bc fc e8 e2 34 bc fc e8 8d 91 c4 fc fb 5b <5d> 41 5c e9 d3 34 bc fc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffff88804956fbf0 EFLAGS: 00000206
RAX: 00000000000000d7 RBX: ffffffff85f037e0 RCX: ffffffff817c6ea6
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff84b7de03
RBP: 0000000000000200 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff86647257 R11: 0000000000000001 R12: ffffffff855197c0
R13: ffffffff85f037f0 R14: 0000000000000000 R15: 0000000000000000
should_fail_ex+0x4d7/0x5e0
should_failslab+0xc2/0x120
kmem_cache_alloc_lru_noprof+0x84/0x690
__d_alloc+0x31/0xa10
d_alloc_pseudo+0x1d/0xc0
alloc_file_pseudo+0xbe/0x220
__shmem_file_setup+0x1a7/0x370
alloc_file+0x2ae/0x590
__x64_sys_memfd_create+0x193/0x280
do_syscall_64+0xbf/0x390
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f04efea2b19
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:00007f04ed417f48 EFLAGS: 00000246 ORIG_RAX: 000000000000013f
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f04efea2b19
RDX: 0000000000001000 RSI: 0000000000000000 RDI: 00007f04efefc0fb
RBP: 0000000000000003 R08: 0000000000000800 R09: ffffffffffffffff
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000008100000
R13: 0000000020000100 R14: 0000000000040000 R15: 0000000020013800
irq event stamp: 216
hardirqs last enabled at (215): [] dump_stack_lvl+0x113/0x120
hardirqs last disabled at (216): [] sysvec_apic_timer_interrupt+0xf/0x80
softirqs last enabled at (210): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (143): [] __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: 0 UID: 0 PID: 11186 Comm: syz-executor.5 Tainted: G W 6.18.0-rc3-next-20251029 #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
memdup_user+0x7e/0xe0
__x64_sys_kexec_load+0x195/0x230
do_syscall_64+0xbf/0x390
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f15ceb04b19
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:00007f15cc07a188 EFLAGS: 00000246 ORIG_RAX: 00000000000000f6
RAX: ffffffffffffffda RBX: 00007f15cec17f60 RCX: 00007f15ceb04b19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f15cc07a1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffde926c28f R14: 00007f15cc07a300 R15: 0000000000022000
loop1: detected capacity change from 0 to 512
loop2: detected capacity change from 0 to 512
FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 0
CPU: 0 UID: 0 PID: 11204 Comm: syz-executor.5 Tainted: G W 6.18.0-rc3-next-20251029 #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: 0033:0x7f15ceab769c
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:00007f15cc07a170 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f15ceab769c
RDX: 000000000000000f RSI: 00007f15cc07a1e0 RDI: 0000000000000003
RBP: 00007f15cc07a1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffde926c28f R14: 00007f15cc07a300 R15: 0000000000022000
EXT4-fs warning (device loop2): ext4_multi_mount_protect:292: Invalid MMP block in superblock
tmpfs: Unknown parameter 'huge}alw„ys'
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 1
CPU: 1 UID: 0 PID: 11205 Comm: syz-executor.7 Tainted: G W 6.18.0-rc3-next-20251029 #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
folio_alloc_mpol_noprof+0x38/0xa0
shmem_alloc_folio+0x11b/0x140
shmem_get_folio_gfp.constprop.0+0x4ea/0x13a0
shmem_write_begin+0x147/0x2e0
generic_perform_write+0x391/0x810
shmem_file_write_iter+0x111/0x140
vfs_write+0xbe9/0x1150
__x64_sys_pwrite64+0x1f1/0x260
do_syscall_64+0xbf/0x390
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3aa6c10ab7
Code: 08 89 3c 24 48 89 4c 24 18 e8 e5 f8 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 48 8b 74 24 08 8b 3c 24 b8 12 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 04 24 e8 15 f9 ff ff 48 8b
RSP: 002b:00007f3aa41d2f20 EFLAGS: 00000293 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007f3aa6ca7970 RCX: 00007f3aa6c10ab7
RDX: 0000000000000062 RSI: 0000000020010000 RDI: 0000000000000004
RBP: 0000000000000003 R08: 0000000000000000 R09: ffffffffffffffff
R10: 0000000000000400 R11: 0000000000000293 R12: 0000000000000004
R13: 0000000000000004 R14: 0000000020000200 R15: 0000000000000000
loop7: detected capacity change from 0 to 512
EXT4-fs (loop7): VFS: Can't find ext4 filesystem
----------------
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 67 72 fc callq 0xfc726793
d: e8 11 5f 9c fc callq 0xfc9c5f23
12: 48 89 ee mov %rbp,%rsi
15: 31 ff xor %edi,%edi
17: e8 47 30 bc fc callq 0xfcbc3063
1c: e8 e2 34 bc fc callq 0xfcbc3503
21: e8 8d 91 c4 fc callq 0xfcc491b3
26: fb sti
27: 5b pop %rbx
* 28: 5d pop %rbp <-- trapping instruction
29: 41 5c pop %r12
2b: e9 d3 34 bc fc jmpq 0xfcbc3503
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