================================================================== BUG: KCSAN: data-race in atime_needs_update / generic_update_time write to 0xffff888120ef2220 of 16 bytes by task 31630 on cpu 0: generic_update_time+0xc2/0x270 fs/inode.c:1673 update_time+0x7d/0x90 fs/inode.c:1695 file_update_time+0x205/0x2d0 fs/inode.c:1910 file_modified fs/inode.c:1933 [inline] file_modified+0x60/0x80 fs/inode.c:1918 ext4_dio_write_checks fs/ext4/file.c:430 [inline] ext4_dio_write_iter fs/ext4/file.c:494 [inline] ext4_file_write_iter+0xad5/0xd30 fs/ext4/file.c:640 call_write_iter include/linux/fs.h:1907 [inline] new_sync_write+0x303/0x400 fs/read_write.c:484 __vfs_write+0x9e/0xb0 fs/read_write.c:497 vfs_write fs/read_write.c:559 [inline] vfs_write+0x189/0x380 fs/read_write.c:543 ksys_write+0xc5/0x1a0 fs/read_write.c:612 __do_sys_write fs/read_write.c:624 [inline] __se_sys_write fs/read_write.c:621 [inline] __x64_sys_write+0x49/0x60 fs/read_write.c:621 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff888120ef2228 of 8 bytes by task 31626 on cpu 1: timespec64_compare include/linux/time64.h:58 [inline] relatime_need_update fs/inode.c:1648 [inline] atime_needs_update+0x2a2/0x360 fs/inode.c:1733 touch_atime+0x63/0x150 fs/inode.c:1748 file_accessed include/linux/fs.h:2226 [inline] generic_file_buffered_read mm/filemap.c:2243 [inline] generic_file_read_iter+0x12fa/0x18c0 mm/filemap.c:2309 ext4_file_read_iter fs/ext4/file.c:131 [inline] ext4_file_read_iter+0x103/0x360 fs/ext4/file.c:114 call_read_iter include/linux/fs.h:1901 [inline] new_sync_read+0x306/0x450 fs/read_write.c:415 __vfs_read+0x9e/0xb0 fs/read_write.c:428 integrity_kernel_read+0x97/0xe0 security/integrity/iint.c:200 ima_calc_file_hash_tfm+0x18f/0x240 security/integrity/ima/ima_crypto.c:358 ima_calc_file_shash security/integrity/ima/ima_crypto.c:389 [inline] ima_calc_file_hash+0x147/0xeb0 security/integrity/ima/ima_crypto.c:454 ima_collect_measurement+0x385/0x3b0 security/integrity/ima/ima_api.c:249 process_measurement+0x91a/0x1000 security/integrity/ima/ima_main.c:324 ima_file_check+0x7e/0xb0 security/integrity/ima/ima_main.c:440 do_open fs/namei.c:3231 [inline] path_openat+0x176e/0x23d0 fs/namei.c:3346 do_filp_open+0x11e/0x1b0 fs/namei.c:3373 do_sys_openat2+0x52e/0x680 fs/open.c:1148 do_sys_open+0xa2/0x110 fs/open.c:1164 __do_sys_openat fs/open.c:1178 [inline] __se_sys_openat fs/open.c:1173 [inline] __x64_sys_openat+0x5d/0x70 fs/open.c:1173 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: 31626 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 ==================================================================