------------[ cut here ]------------
WARNING: kernel/printk/printk_ringbuffer.c:1278 at get_data+0x364/0x400, CPU#0: syz-executor.1/11291
Modules linked in:
CPU: 0 UID: 0 PID: 11291 Comm: syz-executor.1 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:ffff88805067ecc0 EFLAGS: 00010212
RAX: 000000000000067a RBX: ffff88805067edd8 RCX: ffffc90000805000
RDX: 0000000000040000 RSI: ffffffff81555ba3 RDI: 0000000000000006
RBP: ffff88805067eda0 R08: 0000000000000fec R09: 0000016471ca6d10
R10: 0000000000000000 R11: 00002c1b82000050 R12: ffffffff85d30790
R13: 00003fffffffffff R14: 0000000000000000 R15: 0000000000000000
FS:  00007f46717e7700(0000) GS:ffff8880e53ed000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d522000 CR3: 000000000b02f000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 _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
 vprintk_emit+0x4c1/0x690
 _printk+0xbe/0xf0
 __nla_validate_parse+0x765/0x2880
 __nla_parse+0x42/0x60
 genl_family_rcv_msg_attrs_parse.constprop.0+0x1b0/0x290
 genl_family_rcv_msg_doit+0xab/0x2f0
 genl_rcv_msg+0x532/0x7e0
 netlink_rcv_skb+0x147/0x430
 genl_rcv+0x28/0x40
 netlink_unicast+0x5a7/0x870
 netlink_sendmsg+0x8a3/0xd80
 ____sys_sendmsg+0xa67/0xc20
 ___sys_sendmsg+0x10f/0x1b0
 __sys_sendmsg+0x150/0x200
 do_syscall_64+0xbf/0x390
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4674271b19
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:00007f46717e7188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f4674384f60 RCX: 00007f4674271b19
RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003
RBP: 00007f46742cbf6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc4889fbbf R14: 00007f46717e7300 R15: 0000000000022000
 </TASK>
irq event stamp: 1535
hardirqs last  enabled at (1541): [<ffffffff8154e480>] vprintk_emit+0x650/0x690
hardirqs last disabled at (1546): [<ffffffff8154e411>] vprintk_emit+0x5e1/0x690
softirqs last  enabled at (1528): [<ffffffff813bc0ec>] handle_softirqs+0x50c/0x770
softirqs last disabled at (1497): [<ffffffff813bc484>] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
loop5: detected capacity change from 0 to 78
EXT4-fs (loop5): fragment/cluster size (16384) != block size (1024)
loop5: detected capacity change from 0 to 78
EXT4-fs (loop5): fragment/cluster size (16384) != block size (1024)