================================================================== BUG: KCSAN: data-race in touch_atime / touch_atime write to 0xffff888136e433b8 of 8 bytes by task 9151 on cpu 0: inode_set_atime_to_ts include/linux/fs.h:1564 [inline] inode_update_timestamps fs/inode.c:1878 [inline] generic_update_time fs/inode.c:1900 [inline] inode_update_time fs/inode.c:1920 [inline] touch_atime+0x1f3/0x350 fs/inode.c:1992 file_accessed include/linux/fs.h:2457 [inline] ext4_dio_read_iter fs/ext4/file.c:97 [inline] ext4_file_read_iter+0x275/0x2a0 fs/ext4/file.c:145 call_read_iter include/linux/fs.h:2102 [inline] copy_splice_read+0x3a4/0x5d0 fs/splice.c:365 do_splice_read fs/splice.c:984 [inline] splice_direct_to_actor+0x28e/0x670 fs/splice.c:1089 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0xd7/0x150 fs/splice.c:1233 do_sendfile+0x3b9/0x970 fs/read_write.c:1295 __do_sys_sendfile64 fs/read_write.c:1362 [inline] __se_sys_sendfile64 fs/read_write.c:1348 [inline] __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1348 do_syscall_64+0xd3/0x1d0 entry_SYSCALL_64_after_hwframe+0x6d/0x75 read to 0xffff888136e433b8 of 8 bytes by task 9163 on cpu 1: inode_get_atime include/linux/fs.h:1558 [inline] inode_update_timestamps fs/inode.c:1875 [inline] generic_update_time fs/inode.c:1900 [inline] inode_update_time fs/inode.c:1920 [inline] touch_atime+0x1a0/0x350 fs/inode.c:1992 file_accessed include/linux/fs.h:2457 [inline] ext4_dio_read_iter fs/ext4/file.c:97 [inline] ext4_file_read_iter+0x275/0x2a0 fs/ext4/file.c:145 call_read_iter include/linux/fs.h:2102 [inline] copy_splice_read+0x3a4/0x5d0 fs/splice.c:365 do_splice_read fs/splice.c:984 [inline] splice_direct_to_actor+0x28e/0x670 fs/splice.c:1089 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0xd7/0x150 fs/splice.c:1233 do_sendfile+0x3b9/0x970 fs/read_write.c:1295 __do_sys_sendfile64 fs/read_write.c:1362 [inline] __se_sys_sendfile64 fs/read_write.c:1348 [inline] __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1348 do_syscall_64+0xd3/0x1d0 entry_SYSCALL_64_after_hwframe+0x6d/0x75 value changed: 0x0000000027ef6afe -> 0x000000002888017e Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 9163 Comm: syz-executor.2 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 ==================================================================