================================================================== BUG: KCSAN: data-race in atime_needs_update / generic_update_time read to 0xffff88809e8792b8 of 8 bytes by task 17509 on cpu 0: atime_needs_update+0x30f/0x360 fs/inode.c:1740 touch_atime+0x63/0x150 fs/inode.c:1748 file_accessed include/linux/fs.h:2226 [inline] pipe_read+0x837/0x920 fs/pipe.c:418 call_read_iter include/linux/fs.h:1901 [inline] new_sync_read+0x416/0x450 fs/read_write.c:415 __vfs_read+0x9e/0xb0 fs/read_write.c:428 vfs_read fs/read_write.c:462 [inline] vfs_read+0x13e/0x2b0 fs/read_write.c:447 ksys_read+0x16a/0x1a0 fs/read_write.c:588 __do_sys_read fs/read_write.c:598 [inline] __se_sys_read fs/read_write.c:596 [inline] __x64_sys_read+0x49/0x60 fs/read_write.c:596 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffff88809e8792b8 of 16 bytes by task 17506 on cpu 1: generic_update_time+0x5c/0x270 fs/inode.c:1669 update_time+0x7d/0x90 fs/inode.c:1695 touch_atime+0x13f/0x150 fs/inode.c:1766 file_accessed include/linux/fs.h:2226 [inline] pipe_read+0x837/0x920 fs/pipe.c:418 call_read_iter include/linux/fs.h:1901 [inline] do_iter_readv_writev+0x570/0x5d0 fs/read_write.c:692 do_iter_read+0x1e6/0x3a0 fs/read_write.c:934 vfs_readv+0x9c/0xf0 fs/read_write.c:1054 do_readv+0x203/0x240 fs/read_write.c:1091 __do_sys_readv fs/read_write.c:1182 [inline] __se_sys_readv fs/read_write.c:1179 [inline] __x64_sys_readv+0x4b/0x60 fs/read_write.c:1179 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 17506 Comm: syz-executor.4 Not tainted 5.7.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================