KCSAN: data-race in ext4_mb_find_by_goal / mb_free

Kernel	Title	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in ext4_mb_find_by_goal / mb_free_blocks ext4	1	1677d	1677d	0/28	auto-closed as invalid on 2020/07/31 02:03
upstream	KCSAN: data-race in ext4_mb_find_by_goal / mb_free_blocks (3) ext4	2	1394d	1395d	0/28	auto-closed as invalid on 2021/05/17 09:51
upstream	KCSAN: data-race in ext4_mb_find_by_goal / mb_free_blocks (4) ext4	12	1218d	1342d	0/28	auto-closed as invalid on 2021/11/01 11:30

================================================================== BUG: KCSAN: data-race in ext4_mb_find_by_goal / mb_free_blocks read-write to 0xffff8881417181c4 of 4 bytes by task 8479 on cpu 0: mb_free_blocks+0x13d/0xe00 fs/ext4/mballoc.c:1486 ext4_free_blocks+0x13b2/0x1c80 fs/ext4/mballoc.c:5470 ext4_remove_blocks+0x7d5/0x9e0 fs/ext4/extents.c:2498 ext4_ext_rm_leaf+0x69e/0xe60 fs/ext4/extents.c:2664 ext4_ext_remove_space+0x936/0x13e0 fs/ext4/extents.c:2912 ext4_ext_truncate+0xf9/0x160 fs/ext4/extents.c:4370 ext4_truncate+0x82b/0xbb0 fs/ext4/inode.c:4254 ext4_evict_inode+0x938/0xc00 fs/ext4/inode.c:280 evict+0x19f/0x470 fs/inode.c:578 iput_final fs/inode.c:1654 [inline] iput+0x421/0x510 fs/inode.c:1680 do_unlinkat+0x2c9/0x4d0 fs/namei.c:3903 __do_sys_unlink fs/namei.c:3943 [inline] __se_sys_unlink fs/namei.c:3941 [inline] __x64_sys_unlink+0x2c/0x30 fs/namei.c:3941 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff8881417181c4 of 4 bytes by task 685 on cpu 1: ext4_mb_find_by_goal+0x129/0xb30 fs/ext4/mballoc.c:1889 ext4_mb_regular_allocator+0x10f/0x18a0 fs/ext4/mballoc.c:2320 ext4_mb_new_blocks+0x6e8/0x1140 fs/ext4/mballoc.c:4997 ext4_ext_map_blocks+0x15a0/0x1fc0 fs/ext4/extents.c:4238 ext4_map_blocks+0x700/0xfc0 fs/ext4/inode.c:628 ext4_alloc_file_blocks+0x26f/0x700 fs/ext4/extents.c:4426 ext4_fallocate+0x2a7/0x540 fs/ext4/extents.c:4705 vfs_fallocate+0x43d/0x5d0 fs/open.c:309 file_ioctl fs/ioctl.c:494 [inline] do_vfs_ioctl+0xdc9/0xec0 fs/ioctl.c:732 __do_sys_ioctl fs/ioctl.c:751 [inline] __se_sys_ioctl+0x83/0x140 fs/ioctl.c:739 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:739 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 685 Comm: syz-executor.5 Not tainted 5.10.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================