================================================================== BUG: KCSAN: data-race in atime_needs_update / propagate_one read-write to 0xffff888100bcd070 of 4 bytes by task 8456 on cpu 0: propagate_one+0x323/0x3f0 fs/pnode.c:267 propagate_mnt+0x2f8/0x650 fs/pnode.c:319 attach_recursive_mnt+0x4fb/0x1180 fs/namespace.c:2129 graft_tree fs/namespace.c:2237 [inline] do_add_mount fs/namespace.c:2784 [inline] do_new_mount_fc fs/namespace.c:2823 [inline] do_new_mount fs/namespace.c:2877 [inline] path_mount+0x1aed/0x1c10 fs/namespace.c:3205 do_mount fs/namespace.c:3218 [inline] __do_sys_mount fs/namespace.c:3426 [inline] __se_sys_mount+0x23d/0x2e0 fs/namespace.c:3403 __x64_sys_mount+0x63/0x70 fs/namespace.c:3403 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff888100bcd070 of 4 bytes by task 8440 on cpu 1: relatime_need_update fs/inode.c:1720 [inline] atime_needs_update+0x1b7/0x370 fs/inode.c:1815 touch_atime+0x55/0x2d0 fs/inode.c:1830 file_accessed include/linux/fs.h:2220 [inline] generic_file_buffered_read+0x1a1c/0x2110 mm/filemap.c:2458 generic_file_read_iter+0x80/0x3d0 mm/filemap.c:2535 ext4_file_read_iter+0x2d0/0x420 fs/ext4/file.c:74 __kernel_read+0x307/0x560 fs/read_write.c:454 integrity_kernel_read+0x4c/0x70 security/integrity/iint.c:191 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+0x9c7/0x1430 security/integrity/ima/ima_crypto.c:580 ima_collect_measurement+0x168/0x300 security/integrity/ima/ima_api.c:250 process_measurement+0x9f1/0x1050 security/integrity/ima/ima_main.c:330 ima_file_check+0x72/0xa0 security/integrity/ima/ima_main.c:498 do_open fs/namei.c:3254 [inline] path_openat+0x1887/0x20a0 fs/namei.c:3369 do_filp_open+0xbd/0x1d0 fs/namei.c:3396 do_sys_openat2+0xa3/0x240 fs/open.c:1168 do_sys_open fs/open.c:1184 [inline] __do_sys_openat fs/open.c:1200 [inline] __se_sys_openat fs/open.c:1195 [inline] __x64_sys_openat+0xef/0x110 fs/open.c:1195 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 8440 Comm: syz-fuzzer Not tainted 5.10.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================