RBP: 00007f52b13ee1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000000a0103 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffead1c39bf R14: 00007f52b13ee300 R15: 0000000000022000
------------[ cut here ]------------
WARNING: kernel/printk/printk_ringbuffer.c:1278 at get_data+0x364/0x400, CPU#1: syz-executor.4/20699
Modules linked in:
CPU: 1 UID: 0 PID: 20699 Comm: syz-executor.4 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:ffff88806cf08720 EFLAGS: 00010046
RAX: 0000000000010001 RBX: ffff88806cf08838 RCX: ffffffff81555756
RDX: ffff8880171f0000 RSI: ffffffff81555923 RDI: 0000000000000006
RBP: ffff88806cf08800 R08: 0000000000001063 R09: 0000010e24ddae3e
R10: 0000000000000000 R11: 000050db82000023 R12: ffffffff85d30650
R13: 00003fffffffffff R14: 0000000000000000 R15: 0000000000000000
FS: 00007f52b13ee700(0000) GS:ffff8880e54f4000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d323000 CR3: 000000004a9a0000 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:ffff888049d46eb0 EFLAGS: 00000206
RAX: 00000000000001c9 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
kmem_cache_alloc_noprof+0x80/0x690
__es_insert_extent+0xed2/0x1370
ext4_es_insert_extent+0x4d0/0x1100
ext4_map_blocks+0x7ff/0x14a0
ext4_iomap_begin+0xa62/0xe80
iomap_iter+0x544/0xdb0
__iomap_dio_rw+0x698/0x1cd0
iomap_dio_rw+0x40/0xa0
ext4_file_write_iter+0x11f3/0x1a00
iter_file_splice_write+0xa3a/0x11f0
direct_splice_actor+0x192/0x7b0
splice_direct_to_actor+0x347/0x9d0
do_splice_direct+0x179/0x250
do_sendfile+0xa8e/0xdc0
__x64_sys_sendfile64+0x1d3/0x210
do_syscall_64+0xbf/0x390
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f52b3ebab19
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:00007f52b13ee188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f52b3fce0e0 RCX: 00007f52b3ebab19
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000006
RBP: 00007f52b13ee1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000000a0103 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffead1c39bf R14: 00007f52b13ee300 R15: 0000000000022000
irq event stamp: 458
hardirqs last enabled at (457): [] dump_stack_lvl+0x113/0x120
hardirqs last disabled at (458): [] sysvec_apic_timer_interrupt+0xf/0x80
softirqs last enabled at (452): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (447): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 UID: 0 PID: 20725 Comm: syz-executor.5 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
kmem_cache_alloc_noprof+0x80/0x690
ext4_mb_new_blocks+0x64e/0x45b0
ext4_ind_map_blocks+0x184b/0x2340
ext4_map_blocks+0xa9e/0x14a0
ext4_iomap_begin+0xa62/0xe80
iomap_iter+0x544/0xdb0
__iomap_dio_rw+0x698/0x1cd0
iomap_dio_rw+0x40/0xa0
ext4_file_write_iter+0xe16/0x1a00
iter_file_splice_write+0xa3a/0x11f0
direct_splice_actor+0x192/0x7b0
splice_direct_to_actor+0x347/0x9d0
do_splice_direct+0x179/0x250
do_sendfile+0xa8e/0xdc0
__x64_sys_sendfile64+0x1d3/0x210
do_syscall_64+0xbf/0x390
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa44b7e2b19
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:00007fa448d16188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fa44b8f60e0 RCX: 00007fa44b7e2b19
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000006
RBP: 00007fa448d161d0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000000a0103 R11: 0000000000000246 R12: 0000000000000002
R13: 00007fffae33b3bf R14: 00007fa448d16300 R15: 0000000000022000
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
----------------
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