BUG: KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty read-write to 0xffff8881365ee470 of 8 bytes by task 3237 on cpu 0: __mark_inode_dirty+0x1ed/0x5f0 fs/fs-writeback.c:2410 mark_buffer_dirty+0x176/0x390 fs/buffer.c:1109 __block_commit_write fs/buffer.c:2080 [inline] block_write_end+0x13d/0x240 fs/buffer.c:2159 generic_write_end+0x5d/0x230 fs/buffer.c:2173 fat_write_end+0x4a/0x150 fs/fat/inode.c:249 generic_perform_write+0x264/0x3f0 mm/filemap.c:3780 __generic_file_write_iter+0xe3/0x280 mm/filemap.c:3897 generic_file_write_iter+0x75/0x130 mm/filemap.c:3929 do_iter_readv_writev+0x27b/0x300 do_iter_write+0x16f/0x5c0 fs/read_write.c:868 vfs_iter_write+0x4c/0x70 fs/read_write.c:909 iter_file_splice_write+0x44a/0x7c0 fs/splice.c:689 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0x80/0xa0 fs/splice.c:936 splice_direct_to_actor+0x345/0x660 fs/splice.c:891 do_splice_direct+0xfb/0x180 fs/splice.c:979 do_sendfile+0x3ad/0x900 fs/read_write.c:1262 __do_sys_sendfile64 fs/read_write.c:1327 [inline] __se_sys_sendfile64 fs/read_write.c:1313 [inline] __x64_sys_sendfile64+0x10c/0x150 fs/read_write.c:1313 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 read to 0xffff8881365ee470 of 8 bytes by task 3245 on cpu 1: __mark_inode_dirty+0xd5/0x5f0 fs/fs-writeback.c:2395 fat_update_time+0x2c9/0x300 fs/fat/misc.c:359 inode_update_time fs/inode.c:1868 [inline] touch_atime+0x16e/0x2e0 fs/inode.c:1941 file_accessed include/linux/fs.h:2386 [inline] generic_file_splice_read+0x237/0x2c0 fs/splice.c:314 do_splice_to fs/splice.c:796 [inline] splice_direct_to_actor+0x2ac/0x660 fs/splice.c:870 do_splice_direct+0xfb/0x180 fs/splice.c:979 do_sendfile+0x3ad/0x900 fs/read_write.c:1262 __do_sys_sendfile64 fs/read_write.c:1327 [inline] __se_sys_sendfile64 fs/read_write.c:1313 [inline] __x64_sys_sendfile64+0x10c/0x150 fs/read_write.c:1313 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 value changed: 0x0000000000000001 -> 0x0000000000000007 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 3245 Comm: syz-executor.5 Not tainted 5.19.0-rc1-syzkaller-00011-g9886142c7a22-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================