================================================================== BUG: KCSAN: data-race in __mark_inode_dirty / writeback_sb_inodes write to 0xffff888124fa97c0 of 8 bytes by task 21 on cpu 1: writeback_sb_inodes+0x3bd/0xa10 fs/fs-writeback.c:1705 wb_writeback+0x1f9/0x6a0 fs/fs-writeback.c:1892 wb_do_writeback fs/fs-writeback.c:2037 [inline] wb_workfn+0x215/0x970 fs/fs-writeback.c:2078 process_one_work+0x424/0x930 kernel/workqueue.c:2268 worker_thread+0x9a/0x7e0 kernel/workqueue.c:2414 kthread+0x203/0x230 kernel/kthread.c:268 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352 read to 0xffff888124fa97c0 of 8 bytes by task 17179 on cpu 0: __mark_inode_dirty+0xb6/0x940 fs/fs-writeback.c:2272 generic_update_time+0x184/0x270 fs/inode.c:1682 update_time+0x7d/0x90 fs/inode.c:1695 file_update_time+0x205/0x2d0 fs/inode.c:1910 ext4_page_mkwrite+0xed/0x820 fs/ext4/inode.c:5945 do_page_mkwrite+0xfa/0x210 mm/memory.c:2529 do_shared_fault mm/memory.c:3911 [inline] do_fault mm/memory.c:3979 [inline] handle_pte_fault mm/memory.c:4215 [inline] __handle_mm_fault+0x2828/0x2da0 mm/memory.c:4345 handle_mm_fault+0x21c/0x540 mm/memory.c:4382 do_user_addr_fault arch/x86/mm/fault.c:1464 [inline] do_page_fault+0x48a/0xa96 arch/x86/mm/fault.c:1535 page_fault+0x34/0x40 arch/x86/entry/entry_64.S:1203 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 17179 Comm: syz-executor.1 Not tainted 5.7.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================