KCSAN: data-race in __inode_add_bytes / ext4_mark_iloc

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in __inode_add_bytes / ext4_mark_iloc_dirty (2) fs				1	1490d	1490d	0/26	auto-closed as invalid on 2020/05/30 16:54

================================================================== BUG: KCSAN: data-race in __inode_add_bytes / ext4_mark_iloc_dirty read to 0xffff8881259ca178 of 8 bytes by task 25135 on cpu 0: ext4_inode_blocks_set fs/ext4/inode.c:5110 [inline] ext4_do_update_inode fs/ext4/inode.c:5269 [inline] ext4_mark_iloc_dirty+0x656/0x1580 fs/ext4/inode.c:5876 ext4_mark_inode_dirty+0xe9/0x420 fs/ext4/inode.c:6055 ext4_dirty_inode+0x86/0xb0 fs/ext4/inode.c:6086 __mark_inode_dirty+0x5d4/0x940 fs/fs-writeback.c:2255 mark_inode_dirty include/linux/fs.h:2165 [inline] generic_write_end+0x1b7/0x1f0 fs/buffer.c:2159 ext4_da_write_end+0x158/0x620 fs/ext4/inode.c:3189 generic_perform_write+0x1d3/0x320 mm/filemap.c:3316 __generic_file_write_iter+0x251/0x380 mm/filemap.c:3434 ext4_file_write_iter+0x1bd/0xa00 fs/ext4/file.c:268 call_write_iter include/linux/fs.h:1895 [inline] new_sync_write+0x388/0x4a0 fs/read_write.c:483 __vfs_write+0xb1/0xc0 fs/read_write.c:496 vfs_write fs/read_write.c:558 [inline] vfs_write+0x18a/0x390 fs/read_write.c:542 ksys_write+0xd5/0x1b0 fs/read_write.c:611 __do_sys_write fs/read_write.c:623 [inline] __se_sys_write fs/read_write.c:620 [inline] __x64_sys_write+0x4c/0x60 fs/read_write.c:620 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffff8881259ca178 of 8 bytes by task 8238 on cpu 1: __inode_add_bytes+0x56/0xe0 fs/stat.c:679 dquot_claim_space_nodirty+0x311/0x360 fs/quota/dquot.c:1772 dquot_claim_block include/linux/quotaops.h:353 [inline] ext4_da_update_reserve_space+0x14d/0x3a0 fs/ext4/inode.c:378 ext4_ext_map_blocks+0x1e57/0x2330 fs/ext4/extents.c:4520 ext4_map_blocks+0x23a/0xfa0 fs/ext4/inode.c:640 mpage_map_one_extent fs/ext4/inode.c:2468 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2517 [inline] ext4_writepages+0x136e/0x2300 fs/ext4/inode.c:2869 do_writepages+0x6b/0x170 mm/page-writeback.c:2344 __writeback_single_inode+0xaf/0x8e0 fs/fs-writeback.c:1449 writeback_sb_inodes+0x4ba/0xa50 fs/fs-writeback.c:1713 __writeback_inodes_wb+0xe8/0x1b0 fs/fs-writeback.c:1782 wb_writeback+0x557/0x6a0 fs/fs-writeback.c:1891 wb_check_background_flush fs/fs-writeback.c:1959 [inline] wb_do_writeback fs/fs-writeback.c:2047 [inline] wb_workfn+0x696/0x970 fs/fs-writeback.c:2075 process_one_work+0x3d4/0x890 kernel/workqueue.c:2269 worker_thread+0xa0/0x800 kernel/workqueue.c:2415 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 8238 Comm: kworker/u4:5 Not tainted 5.4.0-rc6+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: writeback wb_workfn (flush-8:0) ==================================================================