================================================================== BUG: KCSAN: data-race in atime_needs_update / inode_update_timestamps write to 0xffff888139cd0f38 of 8 bytes by task 17883 on cpu 0: inode_set_atime_to_ts include/linux/fs.h:1537 [inline] inode_update_timestamps+0x4d1/0x560 fs/inode.c:1914 generic_update_time fs/inode.c:1936 [inline] inode_update_time fs/inode.c:1956 [inline] touch_atime+0x15c/0x2d0 fs/inode.c:2028 file_accessed include/linux/fs.h:2360 [inline] ext4_dio_read_iter fs/ext4/file.c:97 [inline] ext4_file_read_iter+0x271/0x2a0 fs/ext4/file.c:145 call_read_iter include/linux/fs.h:2014 [inline] copy_splice_read+0x26b/0x4b0 fs/splice.c:364 vfs_splice_read fs/splice.c:992 [inline] splice_direct_to_actor+0x2aa/0x690 fs/splice.c:1069 do_splice_direct+0x10d/0x190 fs/splice.c:1194 do_sendfile+0x3c4/0x980 fs/read_write.c:1254 __do_sys_sendfile64 fs/read_write.c:1322 [inline] __se_sys_sendfile64 fs/read_write.c:1308 [inline] __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1308 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b read to 0xffff888139cd0f38 of 8 bytes by task 17893 on cpu 1: atime_needs_update+0x3cf/0x550 touch_atime+0x46/0x2d0 fs/inode.c:2011 file_accessed include/linux/fs.h:2360 [inline] ext4_dio_read_iter fs/ext4/file.c:97 [inline] ext4_file_read_iter+0x271/0x2a0 fs/ext4/file.c:145 call_read_iter include/linux/fs.h:2014 [inline] copy_splice_read+0x26b/0x4b0 fs/splice.c:364 vfs_splice_read fs/splice.c:992 [inline] splice_direct_to_actor+0x2aa/0x690 fs/splice.c:1069 do_splice_direct+0x10d/0x190 fs/splice.c:1194 do_sendfile+0x3c4/0x980 fs/read_write.c:1254 __do_sys_sendfile64 fs/read_write.c:1322 [inline] __se_sys_sendfile64 fs/read_write.c:1308 [inline] __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1308 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b value changed: 0x0000000038b26753 -> 0x0000000039e56751 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 17893 Comm: syz-executor.0 Not tainted 6.7.0-rc4-syzkaller-00009-gbee0e7762ad2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 ==================================================================