RBP: 00007f68d487f1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffd3530f74f R14: 00007f68d487f300 R15: 0000000000022000
------------[ cut here ]------------
WARNING: kernel/printk/printk_ringbuffer.c:1278 at get_data+0x364/0x400, CPU#0: in:imklog/176
Modules linked in:
CPU: 0 UID: 0 PID: 176 Comm: in:imklog Not tainted 6.18.0-rc3-next-20251031 #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 17 b8 5b 00 e9 a9 fe ff ff e8 4d bb 1e 00 90 <0f> 0b 90 45 31 e4 e9 3b ff ff ff e8 3c bb 1e 00 90 0f 0b 90 45 31
RSP: 0018:ffff8880173bf768 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff8880173bf880 RCX: ffffffff815559d6
RDX: ffff888015f65280 RSI: ffffffff81555ba3 RDI: 0000000000000006
RBP: ffff8880173bf848 R08: 00000000000010b2 R09: 000000d94897f454
R10: 0000000000000000 R11: 000022c08200001c R12: ffffffff85d30790
R13: 00003fffffffffff R14: 0000000000000000 R15: 0000000000000000
FS: 00007f92515dc700(0000) GS:ffff8880e53ed000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f393ea72718 CR3: 000000000fc88000 CR4: 0000000000350ef0
Call Trace:
_prb_read_valid+0x2f3/0x830
prb_read_valid+0x78/0xa0
syslog_print+0x37c/0x5c0
do_syslog.part.0+0x20b/0x5b0
do_syslog+0xcd/0x110
kmsg_read+0x8e/0xc0
proc_reg_read+0x120/0x310
vfs_read+0x1eb/0xc70
ksys_read+0x121/0x240
do_syscall_64+0xbf/0x390
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f925201f08c
Code: ec 28 48 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 89 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 bf fc ff ff 48
RSP: 002b:00007f92515bb4d0 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f925201f08c
RDX: 0000000000001fa0 RSI: 00007f92515bbd00 RDI: 0000000000000005
RBP: 00005596ccf704c0 R08: 0000000000000000 R09: 00005596ccf6ce88
R10: a3d70a3d70a3d70b R11: 0000000000000246 R12: 00007f92515bbd00
R13: 0000000000001fa0 R14: 00007f92515bbd00 R15: 00007f92515bc6c6
irq event stamp: 33547
hardirqs last enabled at (33553): [] vprintk_emit+0x650/0x690
hardirqs last disabled at (33558): [] vprintk_emit+0x5e1/0x690
softirqs last enabled at (33416): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (33401): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 0
CPU: 0 UID: 0 PID: 8910 Comm: syz-executor.6 Tainted: G W 6.18.0-rc3-next-20251031 #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_noprof+0x21/0x80
filemap_alloc_folio_noprof.part.0+0x372/0x410
__filemap_get_folio_mpol+0x513/0x9a0
ioctx_alloc+0x6d2/0x1e10
__x64_sys_io_setup+0xc8/0x1f0
do_syscall_64+0xbf/0x390
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd945a67b19
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:00007fd942fdd188 EFLAGS: 00000246 ORIG_RAX: 00000000000000ce
RAX: ffffffffffffffda RBX: 00007fd945b7af60 RCX: 00007fd945a67b19
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000208
RBP: 00007fd942fdd1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffce83da6cf R14: 00007fd942fdd300 R15: 0000000000022000