================================================================== BUG: KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode read to 0xffff8880b805f870 of 8 bytes by task 31532 on cpu 0: __mark_inode_dirty+0xb8/0x940 fs/fs-writeback.c:2269 mark_buffer_dirty+0x29c/0x2c0 fs/buffer.c:1116 __block_commit_write.isra.0+0x11f/0x170 fs/buffer.c:2041 block_commit_write fs/buffer.c:2433 [inline] block_page_mkwrite+0x226/0x230 fs/buffer.c:2482 ext4_page_mkwrite+0x5af/0xce0 fs/ext4/inode.c:6217 do_page_mkwrite+0x100/0x210 mm/memory.c:2208 wp_page_shared mm/memory.c:2507 [inline] do_wp_page+0xd65/0x11f0 mm/memory.c:2619 handle_pte_fault mm/memory.c:3865 [inline] __handle_mm_fault+0x1ab1/0x2c70 mm/memory.c:3973 handle_mm_fault+0x21b/0x530 mm/memory.c:4010 do_user_addr_fault arch/x86/mm/fault.c:1441 [inline] __do_page_fault+0x3fb/0x9e0 arch/x86/mm/fault.c:1506 do_page_fault+0x54/0x233 arch/x86/mm/fault.c:1530 page_fault+0x34/0x40 arch/x86/entry/entry_64.S:1202 write to 0xffff8880b805f870 of 8 bytes by task 8142 on cpu 1: __writeback_single_inode+0x345/0x8e0 fs/fs-writeback.c:1484 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_old_data_flush fs/fs-writeback.c:1993 [inline] wb_do_writeback fs/fs-writeback.c:2046 [inline] wb_workfn+0x7bb/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: 8142 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) ==================================================================