[syzbot ci] Re: io_uring/rsrc: remove registered buffer 1GB limit

[syzbot ci <syzbot+ci5f475aa1640b4177@syzkaller.appspotmail.com>]

syzbot ci has tested the following series

[v1] io_uring/rsrc: remove registered buffer 1GB limit
https://lore.kernel.org/all/6de5d329-9162-4992-85cb-f946f2d5c0b1@kernel.dk
* [PATCH] io_uring/rsrc: remove registered buffer 1GB limit

and found the following issue:
WARNING in io_pin_pages

Full report is available here:
https://ci.syzbot.org/series/576c7f20-d7fb-471a-a534-f8f67489e049

***

WARNING in io_pin_pages

tree:      torvalds
URL:       https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux
base:      c7e4e4d5f7dc2daa439303d1b5bf6bdfaa249f49
arch:      amd64
compiler:  Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
config:    https://ci.syzbot.org/builds/287c9ce7-c085-4a41-9f94-756762f8dacf/config
syz repro: https://ci.syzbot.org/findings/63ff94b0-aced-41c6-83fc-a917c57ad624/syz_repro

------------[ cut here ]------------
!(flags & __GFP_NOWARN)
WARNING: mm/slub.c:6840 at __kvmalloc_node_noprof+0x7be/0x8a0 mm/slub.c:6840, CPU#1: syz.1.18/5830
Modules linked in:
CPU: 1 UID: 0 PID: 5830 Comm: syz.1.18 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__kvmalloc_node_noprof+0x7be/0x8a0 mm/slub.c:6840
Code: ff 48 c7 c7 d0 bd a8 8e 48 89 de e8 dc 48 c9 02 e9 49 fc ff ff 48 c7 c7 10 be a8 8e 48 89 de e8 c8 48 c9 02 e9 7e fc ff ff 90 <0f> 0b 90 45 31 e4 e9 f8 fd ff ff 90 0f 0b 90 e9 52 ff ff ff 49 83
RSP: 0018:ffffc90003a37928 EFLAGS: 00010246
RAX: 0000000000000004 RBX: 0000000201000008 RCX: 0000000080000001
RDX: 0000000201000008 RSI: ffffffff8c28ac40 RDI: ffffffff8c28ac00
RBP: ffffc90003a37b70 R08: 00000000004028c0 R09: 00000000ffffffff
R10: 0000000000000006 R11: 0000000000000000 R12: 0000000000000000
R13: 00000000004028c0 R14: 0000000000000016 R15: 00000000ffffffff
FS:  00007fb3823ec6c0(0000) GS:ffff8882a9290000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcca0efe68 CR3: 000000017064e000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 io_pin_pages+0xac/0x1a0 io_uring/memmap.c:59
 io_sqe_buffer_register+0x228/0x1860 io_uring/rsrc.c:801
 io_sqe_buffers_register+0x2f9/0x7e0 io_uring/rsrc.c:913
 io_register_rsrc+0x24d/0x280 io_uring/rsrc.c:414
 __io_uring_register io_uring/register.c:843 [inline]
 __do_sys_io_uring_register io_uring/register.c:1029 [inline]
 __se_sys_io_uring_register+0xc5d/0x1ac0 io_uring/register.c:1006
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb38159cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb3823ec028 EFLAGS: 00000246 ORIG_RAX: 00000000000001ab
RAX: ffffffffffffffda RBX: 00007fb381815fa0 RCX: 00007fb38159cdd9
RDX: 0000200000002700 RSI: 000000000000000f RDI: 0000000000000003
RBP: 00007fb381632d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000020 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb381816038 R14: 00007fb381815fa0 R15: 00007fffdb4e7d78
 </TASK>


***

If these findings have caused you to resend the series or submit a
separate fix, please add the following tag to your commit message:
  Tested-by: syzbot@syzkaller.appspotmail.com

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