IPVS: ftp: loaded support on port[0] = 21
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BUG: KASAN: global-out-of-bounds in record_print_text+0x3aa/0x3e0 kernel/printk/printk.c:1401
Write of size 1 at addr ffffffff8f934ada by task syz-executor.0/20583

CPU: 0 PID: 20583 Comm: syz-executor.0 Not tainted 5.11.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x183/0x22e lib/dump_stack.c:120
 print_address_description+0x5f/0x3b0 mm/kasan/report.c:230
 __kasan_report mm/kasan/report.c:396 [inline]
 kasan_report+0x15e/0x200 mm/kasan/report.c:413
 record_print_text+0x3aa/0x3e0 kernel/printk/printk.c:1401
 console_unlock+0x6f6/0xda0 kernel/printk/printk.c:2555
 vprintk_emit+0x1b2/0x270 kernel/printk/printk.c:2092
 printk+0xc0/0x103 kernel/printk/printk.c:2140
 __ip_vs_ftp_init+0x1b7/0x370 net/netfilter/ipvs/ip_vs_ftp.c:594
 ops_init+0x327/0x410 net/core/net_namespace.c:152
 setup_net+0x22b/0x820 net/core/net_namespace.c:342
 copy_net_ns+0x392/0x5e0 net/core/net_namespace.c:483
 create_new_namespaces+0x4ce/0xa00 kernel/nsproxy.c:110
 copy_namespaces+0x2f6/0x350 kernel/nsproxy.c:178
 copy_process+0x20fd/0x5640 kernel/fork.c:2102
 kernel_clone+0x21a/0x7d0 kernel/fork.c:2464
 __do_sys_clone kernel/fork.c:2581 [inline]
 __se_sys_clone kernel/fork.c:2565 [inline]
 __x64_sys_clone+0x249/0x2c0 kernel/fork.c:2565
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e219
Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f1ed8969c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045e219
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000048302b00
RBP: 000000000119bfd0 R08: 0000000020000580 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c
R13: 00007fff4bf4f84f R14: 00007f1ed896a9c0 R15: 000000000119bf8c

The buggy address belongs to the variable:
 console_unlock.text+0x4da/0x500

Memory state around the buggy address:
 ffffffff8f934980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffffff8f934a00: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
>ffffffff8f934a80: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
                                                    ^
 ffffffff8f934b00: 00 f9 f9 f9 f9 f9 f9 f9 00 f9 f9 f9 f9 f9 f9 f9
 ffffffff8f934b80: 00 f9 f9 f9 f9 f9 f9 f9 00 f9 f9 f9 f9 f9 f9 f9
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