[syzbot] [block?] WARNING in blk_validate_limits

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 6b8c8af514d7 Add linux-next specific files for 20260807
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=112e0149580000
kernel config: https://syzkaller.appspot.com/x/.config?x=6d343b54cc50df0f
dashboard link: https://syzkaller.appspot.com/bug?extid=ac00e7bf7ac8c91af921
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=112f6fb9580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/71ff4edcb608/disk-6b8c8af5.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/1f5fa331d8f2/vmlinux-6b8c8af5.xz
kernel image: https://storage.googleapis.com/syzbot-assets/f993558ec63b/bzImage-6b8c8af5.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/9a307a7695b3/mount_1.gz
fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=15456132580000)

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ac00e7...@syzkaller.appspotmail.com

F2FS-fs (loop0): f2fs_disable_checkpoint: call f2fs_write_checkpoint(), meta: 0, node: 0, data: 0
F2FS-fs (loop0): Start checkpoint disabled!
F2FS-fs (loop0): f2fs_disable_checkpoint finishes, err:0
F2FS-fs (loop0): Mounted with checkpoint version = 48b305e6
------------[ cut here ]------------
lim->dma_alignment > PAGE_SIZE
WARNING: block/blk-settings.c:497 at blk_validate_limits+0x1676/0x2270 block/blk-settings.c:497, CPU#0: syz.0.17/5837
Modules linked in:
CPU: 0 UID: 0 PID: 5837 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:blk_validate_limits+0x1676/0x2270 block/blk-settings.c:497
Code: e8 ef 7e 11 fd 90 0f 0b 90 eb 8f e8 e4 7e 11 fd 90 0f 0b 90 eb 84 e8 d9 7e 11 fd 90 0f 0b 90 e9 76 ff ff ff e8 cb 7e 11 fd 90 <0f> 0b 90 e9 68 ff ff ff e8 bd 7e 11 fd 90 0f 0b 90 e9 81 00 00 00
RSP: 0018:ffffc90003366e60 EFLAGS: 00010293
RAX: ffffffff84b60635 RBX: ffffc900033670f0 RCX: ffff8880320dbe80
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000001000
RBP: 00000000ffffffff R08: ffff88806ffbcb5f R09: 1ffff1100dff796b
R10: dffffc0000000000 R11: ffffed100dff796c R12: ffffc90003367040
R13: dffffc0000000000 R14: 1ffff9200066ce1e R15: dffffc0000000000
FS: 000055557d3c5500(0000) GS:ffff888124f0c000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4283f8dd30 CR3: 0000000075748000 CR4: 00000000003526f0
Call Trace:
<TASK>
queue_limits_commit_update+0x87/0x390 block/blk-settings.c:552
loop_configure+0x7f1/0xdc0 drivers/block/loop.c:1086
lo_ioctl+0xad5/0x2150 drivers/block/loop.c:1564
blkdev_ioctl+0x5e3/0x740 block/ioctl.c:798
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x510 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f222c19e0d9
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:00007fffebd792d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f222c425fa0 RCX: 00007f222c19e0d9
RDX: 00002000000005c0 RSI: 0000000000004c0a RDI: 0000000000000003
RBP: 00007f222c235024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f222c425fac R14: 00007f222c425fa0 R15: 00007f222c425fa0
</TASK>


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