syzbot

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BUG: KCSAN: data-race in bdev_statx / queue_limits_commit_update

read to 0xffff888101deaa48 of 4 bytes by task 9151 on cpu 1:
 queue_io_min include/linux/blkdev.h:1405 [inline]
 bdev_io_min include/linux/blkdev.h:1410 [inline]
 bdev_statx+0x295/0x2d0 block/bdev.c:1358
 vfs_getattr_nosec+0x1b6/0x1e0 fs/stat.c:227
 vfs_getattr+0x48/0x60 fs/stat.c:262
 vfs_statx_path+0x28/0x140 fs/stat.c:299
 vfs_statx+0xc4/0x170 fs/stat.c:356
 vfs_fstatat+0x118/0x170 fs/stat.c:373
 __do_sys_newfstatat fs/stat.c:538 [inline]
 __se_sys_newfstatat+0x55/0x3e0 fs/stat.c:532
 __x64_sys_newfstatat+0x55/0x70 fs/stat.c:532
 x64_sys_call+0x2c64/0x3020 arch/x86/include/generated/asm/syscalls_64.h:263
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x12c/0x370 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

write to 0xffff888101deaa08 of 192 bytes by task 9668 on cpu 0:
 queue_limits_commit_update+0x4b/0x160 block/blk-settings.c:577
 loop_configure+0x78c/0x9c0 drivers/block/loop.c:1064
 lo_ioctl+0x1e1/0x13a0 drivers/block/loop.c:1534
 blkdev_ioctl+0x387/0x460 block/ioctl.c:804
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xce/0x140 fs/ioctl.c:583
 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:583
 x64_sys_call+0x1563/0x3020 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x12c/0x370 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 9668 Comm: syz.0.1667 Tainted: G        W           syzkaller #0 PREEMPT(full) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
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loop0: detected capacity change from 0 to 512
EXT4-fs: Ignoring removed nobh option
EXT4-fs: Ignoring removed orlov option
EXT4-fs: Ignoring removed mblk_io_submit option
EXT4-fs error (device loop0): __ext4_iget:5378: inode #11: block 1: comm syz.0.1667: invalid block
loop0: lost file I/O error report for ino 11 type 5 pos 0x0 len 0x0 error -117
EXT4-fs error (device loop0): ext4_orphan_get:1396: comm syz.0.1667: couldn't read orphan inode 11 (err -117)
loop0: lost filesystem error report for type 5 error -117
EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.