================================================================== BUG: KCSAN: data-race in atime_needs_update / propagate_one write to 0xffff88812b395830 of 4 bytes by task 8654 on cpu 1: propagate_one+0x32d/0x400 fs/pnode.c:267 propagate_mnt+0x2f8/0x640 fs/pnode.c:319 attach_recursive_mnt+0x519/0x1210 fs/namespace.c:2129 graft_tree fs/namespace.c:2237 [inline] do_add_mount fs/namespace.c:2783 [inline] do_new_mount_fc fs/namespace.c:2822 [inline] do_new_mount fs/namespace.c:2876 [inline] do_mount+0x1aa8/0x1bd0 fs/namespace.c:3199 __do_sys_mount fs/namespace.c:3409 [inline] __se_sys_mount+0xd3/0x100 fs/namespace.c:3386 __x64_sys_mount+0x63/0x70 fs/namespace.c:3386 do_syscall_64+0x71/0x120 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88812b395830 of 4 bytes by task 8632 on cpu 0: relatime_need_update fs/inode.c:1718 [inline] atime_needs_update+0x1b7/0x370 fs/inode.c:1813 touch_atime+0x53/0x1a0 fs/inode.c:1828 file_accessed include/linux/fs.h:2229 [inline] generic_file_buffered_read+0x167e/0x1750 mm/filemap.c:2240 generic_file_read_iter+0x7d/0x3e0 mm/filemap.c:2307 ext4_file_read_iter+0x2dd/0x410 fs/ext4/file.c:73 call_read_iter include/linux/fs.h:1901 [inline] new_sync_read fs/read_write.c:415 [inline] __vfs_read+0x2d5/0x330 fs/read_write.c:428 integrity_kernel_read+0xb4/0x100 security/integrity/iint.c:200 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:484 [inline] ima_calc_file_shash security/integrity/ima/ima_crypto.c:515 [inline] ima_calc_file_hash+0x9bf/0x13e0 security/integrity/ima/ima_crypto.c:580 ima_collect_measurement+0x168/0x310 security/integrity/ima/ima_api.c:250 process_measurement+0x9fc/0x1040 security/integrity/ima/ima_main.c:324 ima_file_check+0x75/0xa0 security/integrity/ima/ima_main.c:492 do_open fs/namei.c:3245 [inline] path_openat+0x18a2/0x20e0 fs/namei.c:3360 do_filp_open+0xbd/0x1d0 fs/namei.c:3387 do_sys_openat2+0x33c/0x4a0 fs/open.c:1179 do_sys_open fs/open.c:1195 [inline] __do_sys_openat fs/open.c:1209 [inline] __se_sys_openat fs/open.c:1204 [inline] __x64_sys_openat+0xef/0x110 fs/open.c:1204 do_syscall_64+0x71/0x120 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 8632 Comm: syz-fuzzer Not tainted 5.8.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================