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BUG: KCSAN: data-race in ext4_mb_find_by_goal / mb_mark_used

write to 0xffff8881010fe254 of 4 bytes by task 17326 on cpu 0:
 mb_mark_used+0x13b/0xc50 fs/ext4/mballoc.c:1947
 ext4_mb_use_best_found+0x102/0x320 fs/ext4/mballoc.c:2019
 ext4_mb_find_by_goal+0x5d4/0x8a0
 ext4_mb_regular_allocator+0x130/0x2530 fs/ext4/mballoc.c:2654
 ext4_mb_new_blocks+0x792/0x1fc0 fs/ext4/mballoc.c:5586
 ext4_ext_map_blocks+0x15ed/0x1ff0 fs/ext4/extents.c:4250
 ext4_map_blocks+0x71e/0xf00 fs/ext4/inode.c:637
 ext4_alloc_file_blocks+0x281/0x730 fs/ext4/extents.c:4437
 ext4_zero_range+0x348/0xa80 fs/ext4/extents.c:4550
 ext4_fallocate+0x226/0x4d0 fs/ext4/extents.c:4687
 vfs_fallocate+0x459/0x6a0 fs/open.c:307
 do_vfs_ioctl+0x13c6/0x14c0 fs/ioctl.c:853
 __do_sys_ioctl fs/ioctl.c:872 [inline]
 __se_sys_ioctl+0x83/0x140 fs/ioctl.c:860
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff8881010fe254 of 4 bytes by task 17320 on cpu 1:
 ext4_mb_find_by_goal+0x13a/0x8a0 fs/ext4/mballoc.c:2207
 ext4_mb_regular_allocator+0x130/0x2530 fs/ext4/mballoc.c:2654
 ext4_mb_new_blocks+0x792/0x1fc0 fs/ext4/mballoc.c:5586
 ext4_ext_map_blocks+0x15ed/0x1ff0 fs/ext4/extents.c:4250
 ext4_map_blocks+0x71e/0xf00 fs/ext4/inode.c:637
 ext4_alloc_file_blocks+0x281/0x730 fs/ext4/extents.c:4437
 ext4_zero_range+0x348/0xa80 fs/ext4/extents.c:4550
 ext4_fallocate+0x226/0x4d0 fs/ext4/extents.c:4687
 vfs_fallocate+0x459/0x6a0 fs/open.c:307
 do_vfs_ioctl+0x13c6/0x14c0 fs/ioctl.c:853
 __do_sys_ioctl fs/ioctl.c:872 [inline]
 __se_sys_ioctl+0x83/0x140 fs/ioctl.c:860
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x00005000 -> 0x00004800

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 17320 Comm: syz-executor.1 Not tainted 5.15.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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