RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 0000000000000004 R14: 00000000200025d8 R15: 0000000000000001
------------[ cut here ]------------
WARNING: kernel/printk/printk_ringbuffer.c:1278 at get_data+0x364/0x400, CPU#0: syz-executor.6/6973
Modules linked in:
CPU: 0 UID: 0 PID: 6973 Comm: syz-executor.6 Not tainted 6.18.0-rc4-next-20251106 #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 e7 4c 5c 00 e9 a9 fe ff ff e8 6d 1c 1f 00 90 <0f> 0b 90 45 31 e4 e9 3b ff ff ff e8 5c 1c 1f 00 90 0f 0b 90 45 31
RSP: 0018:ffff88806ce086b8 EFLAGS: 00010046
RAX: 0000000000010000 RBX: ffff88806ce087d0 RCX: ffffffff8155afe6
RDX: ffff888049225340 RSI: ffffffff8155b1b3 RDI: 0000000000000006
RBP: ffff88806ce08798 R08: 00000000000010da R09: 000000b2c5d0b340
R10: 0000000000000000 R11: 00001b3d8200001b R12: ffffffff85d2e610
R13: 00003fffffffffff R14: 0000000000000000 R15: 0000000000000000
FS: 00007fb20e24b700(0000) GS:ffff8880e539c000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe3bb37c3a4 CR3: 000000004a18c000 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/0xab0
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 76 39 6d fc e8 d1 82 97 fc 48 89 ee 31 ff e8 c7 b7 b7 fc e8 62 bc b7 fc e8 7d 26 c0 fc fb 5b <5d> 41 5c e9 53 bc b7 fc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffff888018ad7610 EFLAGS: 00000206
RAX: 0000000000000163 RBX: ffffffff85f02940 RCX: 0000000000000040
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff84bd11c3
RBP: 0000000000000200 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff86648d57 R11: 0000000000000001 R12: ffffffff855204a0
R13: ffffffff85f02950 R14: 0000000000000000 R15: 0000000000000000
should_fail_ex+0x4d7/0x5e0
should_failslab+0xc2/0x120
kmem_cache_alloc_node_noprof+0x87/0x6b0
__alloc_skb+0x2ab/0x370
alloc_uevent_skb+0x7b/0x210
kobject_uevent_env+0xa8c/0xf90
loop_configure+0xe31/0x15a0
lo_ioctl+0x66d/0x1ca0
blkdev_ioctl+0x365/0x6d0
__x64_sys_ioctl+0x18f/0x210
do_syscall_64+0xbf/0x430
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb210cd58d7
Code: 3c 1c 48 f7 d8 49 39 c4 72 b8 e8 a4 54 02 00 85 c0 78 bd 48 83 c4 08 4c 89 e0 5b 41 5c c3 0f 1f 44 00 00 b8 10 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:00007fb20e24ae98 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb210d1f970 RCX: 00007fb210cd58d7
RDX: 0000000000000004 RSI: 0000000000004c00 RDI: 0000000000000005
RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 0000000000000004 R14: 00000000200025d8 R15: 0000000000000001
irq event stamp: 356
hardirqs last enabled at (355): [] dump_stack_lvl+0x113/0x120
hardirqs last disabled at (356): [] sysvec_apic_timer_interrupt+0xf/0x80
softirqs last enabled at (350): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (341): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
loop2: detected capacity change from 0 to 1
loop4: detected capacity change from 0 to 1
loop7: detected capacity change from 0 to 1
loop3: detected capacity change from 0 to 1
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 UID: 0 PID: 6984 Comm: syz-executor.3 Tainted: G W 6.18.0-rc4-next-20251106 #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
alloc_uevent_skb+0x7b/0x210
kobject_uevent_env+0xa8c/0xf90
loop_configure+0xe31/0x15a0
lo_ioctl+0x66d/0x1ca0
blkdev_ioctl+0x365/0x6d0
__x64_sys_ioctl+0x18f/0x210
do_syscall_64+0xbf/0x430
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3ecbf538d7
Code: 3c 1c 48 f7 d8 49 39 c4 72 b8 e8 a4 54 02 00 85 c0 78 bd 48 83 c4 08 4c 89 e0 5b 41 5c c3 0f 1f 44 00 00 b8 10 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:00007f3ec94c8e98 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f3ecbf9d970 RCX: 00007f3ecbf538d7
RDX: 0000000000000004 RSI: 0000000000004c00 RDI: 0000000000000005
RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 0000000000000004 R14: 00000000200025d8 R15: 0000000000000001
loop1: detected capacity change from 0 to 1
loop6: detected capacity change from 0 to 1
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 UID: 0 PID: 6993 Comm: syz-executor.2 Tainted: G W 6.18.0-rc4-next-20251106 #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
security_inode_alloc+0x3e/0x130
inode_init_always_gfp+0xc9d/0xff0
alloc_inode+0x8d/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/0x430
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe3ba32fb19
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:00007fe3b78a4e98 EFLAGS: 00000246 ORIG_RAX: 000000000000013f
RAX: ffffffffffffffda RBX: 00000000200025c0 RCX: 00007fe3ba32fb19
RDX: 0000000000000040 RSI: 0000000000000000 RDI: 00007fe3ba3890fb
RBP: 0000000000000001 R08: 0000000000000020 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000008100000
R13: 00007ffd3eaec60f R14: 0000000000000040 R15: 0000000000022000
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 UID: 0 PID: 6996 Comm: syz-executor.4 Tainted: G W 6.18.0-rc4-next-20251106 #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
security_inode_alloc+0x3e/0x130
inode_init_always_gfp+0xc9d/0xff0
alloc_inode+0x8d/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/0x430
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbfeb229b19
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:00007fbfe879ee98 EFLAGS: 00000246 ORIG_RAX: 000000000000013f
RAX: ffffffffffffffda RBX: 00000000200025c0 RCX: 00007fbfeb229b19
RDX: 0000000000000040 RSI: 0000000000000000 RDI: 00007fbfeb2830fb
RBP: 0000000000000001 R08: 0000000000000020 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000008100000
R13: 00007ffd07ed737f R14: 0000000000000040 R15: 0000000000022000
loop2: detected capacity change from 0 to 1
loop1: detected capacity change from 0 to 1
loop6: detected capacity change from 0 to 1
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 UID: 0 PID: 7015 Comm: syz-executor.1 Tainted: G W 6.18.0-rc4-next-20251106 #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
netlink_broadcast_filtered+0xab1/0xe90
netlink_broadcast+0x39/0x50
kobject_uevent_env+0xa58/0xf90
loop_configure+0xe31/0x15a0
lo_ioctl+0x66d/0x1ca0
blkdev_ioctl+0x365/0x6d0
__x64_sys_ioctl+0x18f/0x210
do_syscall_64+0xbf/0x430
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f51258078d7
Code: 3c 1c 48 f7 d8 49 39 c4 72 b8 e8 a4 54 02 00 85 c0 78 bd 48 83 c4 08 4c 89 e0 5b 41 5c c3 0f 1f 44 00 00 b8 10 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:00007f5122d7ce98 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f5125851970 RCX: 00007f51258078d7
RDX: 0000000000000004 RSI: 0000000000004c00 RDI: 0000000000000005
RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 0000000000000004 R14: 00000000200025d8 R15: 0000000000000001
loop4: detected capacity change from 0 to 1
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 0
CPU: 0 UID: 0 PID: 7012 Comm: syz-executor.6 Tainted: G W 6.18.0-rc4-next-20251106 #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
alloc_uevent_skb+0x7b/0x210
kobject_uevent_env+0xa8c/0xf90
loop_configure+0xe31/0x15a0
lo_ioctl+0x66d/0x1ca0
blkdev_ioctl+0x365/0x6d0
__x64_sys_ioctl+0x18f/0x210
do_syscall_64+0xbf/0x430
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb210cd58d7
Code: 3c 1c 48 f7 d8 49 39 c4 72 b8 e8 a4 54 02 00 85 c0 78 bd 48 83 c4 08 4c 89 e0 5b 41 5c c3 0f 1f 44 00 00 b8 10 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:00007fb20e24ae98 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb210d1f970 RCX: 00007fb210cd58d7
RDX: 0000000000000004 RSI: 0000000000004c00 RDI: 0000000000000005
RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 0000000000000004 R14: 00000000200025d8 R15: 0000000000000001
CPU: 1 UID: 0 PID: 7018 Comm: syz-executor.7 Tainted: G W 6.18.0-rc4-next-20251106 #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
strncpy_from_user+0x3b/0x2f0
alloc_name+0x78/0x110
__x64_sys_memfd_create+0x130/0x280
do_syscall_64+0xbf/0x430
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2d2807fb19
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:00007f2d255f4e98 EFLAGS: 00000246 ORIG_RAX: 000000000000013f
RAX: ffffffffffffffda RBX: 00000000200025c0 RCX: 00007f2d2807fb19
RDX: 0000000000000040 RSI: 0000000000000000 RDI: 00007f2d280d90fb
RBP: 0000000000000001 R08: 0000000000000020 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000008100000
R13: 00007ffc88a2cf8f R14: 0000000000000040 R15: 0000000000022000
loop3: detected capacity change from 0 to 1
loop6: detected capacity change from 0 to 1
loop1: detected capacity change from 0 to 1
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 UID: 0 PID: 7031 Comm: syz-executor.2 Tainted: G W 6.18.0-rc4-next-20251106 #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_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/0x430
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe3ba32fb19
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:00007fe3b78a4e98 EFLAGS: 00000246 ORIG_RAX: 000000000000013f
RAX: ffffffffffffffda RBX: 00000000200025c0 RCX: 00007fe3ba32fb19
RDX: 0000000000000040 RSI: 0000000000000000 RDI: 00007fe3ba3890fb
RBP: 0000000000000001 R08: 0000000000000020 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000008100000
R13: 00007ffd3eaec60f R14: 0000000000000040 R15: 0000000000022000
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 UID: 0 PID: 7033 Comm: syz-executor.7 Tainted: G W 6.18.0-rc4-next-20251106 #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
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/0x430
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2d2807fb19
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:00007f2d255f4e98 EFLAGS: 00000246 ORIG_RAX: 000000000000013f
RAX: ffffffffffffffda RBX: 00000000200025c0 RCX: 00007f2d2807fb19
RDX: 0000000000000040 RSI: 0000000000000000 RDI: 00007f2d280d90fb
RBP: 0000000000000001 R08: 0000000000000020 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000008100000
R13: 00007ffc88a2cf8f R14: 0000000000000040 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 76 39 6d fc callq 0xfc6d3983
d: e8 d1 82 97 fc callq 0xfc9782e3
12: 48 89 ee mov %rbp,%rsi
15: 31 ff xor %edi,%edi
17: e8 c7 b7 b7 fc callq 0xfcb7b7e3
1c: e8 62 bc b7 fc callq 0xfcb7bc83
21: e8 7d 26 c0 fc callq 0xfcc026a3
26: fb sti
27: 5b pop %rbx
* 28: 5d pop %rbp <-- trapping instruction
29: 41 5c pop %r12
2b: e9 53 bc b7 fc jmpq 0xfcb7bc83
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