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
------------[ cut here ]------------
WARNING: kernel/printk/printk_ringbuffer.c:1278 at get_data+0x364/0x400, CPU#1: syz-executor.0/13324
Modules linked in:
CPU: 1 UID: 0 PID: 13324 Comm: syz-executor.0 Not tainted 6.18.0-rc2-next-20251024 #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 37 89 5b 00 e9 a9 fe ff ff e8 fd b6 1e 00 90 <0f> 0b 90 45 31 e4 e9 3b ff ff ff e8 ec b6 1e 00 90 0f 0b 90 45 31
RSP: 0018:ffff88804cc6edb8 EFLAGS: 00010012
RAX: 000000000001fc3c RBX: ffffffff85df99f8 RCX: ffffc900007e9000
RDX: 0000000000040000 RSI: ffffffff81555423 RDI: 0000000000000006
RBP: ffff88804cc6eeb8 R08: 0000000000000001 R09: ffffed100998ddd9
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff85d30690
R13: 00003fffffffffff R14: 0000000000000000 R15: 0000000000000000
FS: 00007f60f5b5b700(0000) GS:ffff8880e54f4000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d221000 CR3: 0000000053768000 CR4: 0000000000350ef0
Call Trace:
prb_reserve_in_last+0x5c2/0x11f0
vprintk_store+0x663/0xa20
vprintk_emit+0x150/0x690
_printk+0xbe/0xf0
__show_regs+0x7a/0x750
show_trace_log_lvl+0x24d/0x380
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
__ip6_append_data+0x3afe/0x4470
ip6_append_data+0x19e/0x4d0
rawv6_sendmsg+0x158d/0x40c0
inet_sendmsg+0x121/0x150
____sys_sendmsg+0x947/0xc20
___sys_sendmsg+0x10f/0x1b0
__sys_sendmsg+0x150/0x200
do_syscall_64+0xbf/0x390
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f60f85e5b19
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:00007f60f5b5b188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f60f86f8f60 RCX: 00007f60f85e5b19
RDX: 0000000000000000 RSI: 0000000020000540 RDI: 0000000000000003
RBP: 00007f60f5b5b1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffe0484f00f R14: 00007f60f5b5b300 R15: 0000000000022000
irq event stamp: 360
hardirqs last enabled at (359): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (360): [] dump_stack_lvl+0x90/0x120
softirqs last enabled at (238): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (223): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f60f86f8f60 RCX: 00007f60f85e5b19
RDX: 0000000000000000 RSI: 0000000020000540 RDI: 0000000000000003
RBP: 00007f60f5b5b1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffe0484f00f R14: 00007f60f5b5b300 R15: 0000000000022000
----------------
Code disassembly (best guess), 1 bytes skipped:
0: ff c3 inc %ebx
2: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1)
9: 00 00 00
c: 0f 1f 40 00 nopl 0x0(%rax)
10: 48 89 f8 mov %rdi,%rax
13: 48 89 f7 mov %rsi,%rdi
16: 48 89 d6 mov %rdx,%rsi
19: 48 89 ca mov %rcx,%rdx
1c: 4d 89 c2 mov %r8,%r10
1f: 4d 89 c8 mov %r9,%r8
22: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9
27: 0f 05 syscall
* 29: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction
2f: 73 01 jae 0x32
31: c3 retq
32: 48 c7 c1 bc ff ff ff mov $0xffffffffffffffbc,%rcx
39: f7 d8 neg %eax
3b: 64 89 01 mov %eax,%fs:(%rcx)
3e: 48 rex.W