diff options
| -rw-r--r-- | sys/linux/test/landlock_fs_disconnected | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/sys/linux/test/landlock_fs_disconnected b/sys/linux/test/landlock_fs_disconnected new file mode 100644 index 000000000..ceaa6cddb --- /dev/null +++ b/sys/linux/test/landlock_fs_disconnected @@ -0,0 +1,56 @@ +# Test access through a disconnected directory. + +# Creates a private mount namespace with CLONE_NEWNS. This avoids a syz-manager +# error because of a bogus call to umount(./0/file0/file2/file3): +# none/cover C/repeat C/thr/cover C/repeat C: FAIL + +unshare(0x20000) + +# Create a tmpfs mount. + +mkdirat(0xffffffffffffff9c, &AUTO='./file0\x00', 0x1c0) +mount$tmpfs(0x0, &AUTO='./file0\x00', &AUTO='tmpfs\x00', 0x0, 0x0) + +# Create directories and a test file in the tmpfs mount. + +mkdirat(0xffffffffffffff9c, &AUTO='./file0/file1\x00', 0x1c0) +mkdirat(0xffffffffffffff9c, &AUTO='./file0/file1/file2\x00', 0x1c0) +mkdirat(0xffffffffffffff9c, &AUTO='./file0/file1/file2/file3\x00', 0x1c0) +mkdirat(0xffffffffffffff9c, &AUTO='./file0/file1/file2/file3/file4\x00', 0x1c0) +mknodat(0xffffffffffffff9c, &AUTO='./file0/file1/file2/file3/file5\x00', 0x81c0, 0x0) +mkdirat(0xffffffffffffff9c, &AUTO='./file0/file6\x00', 0x1c0) + +# Creates first bind mount from file3 to file3. This is an optional call useful +# to extend coverage of is_access_to_paths_allowed(). + +mount$bind(&AUTO='./file0/file1/file2/file3\x00', &AUTO='./file0/file1/file2/file3\x00', 0x0, 0x1000, 0x0) + +# Creates second recursive bind mount from file1 to file6. + +mount$bind(&AUTO='./file0/file1\x00', &AUTO='./file0/file6\x00', 0x0, 0x5000, 0x0) + +# Opens directory from the bind mount. + +r0 = openat$dir(0xffffffffffffff9c, &AUTO='./file0/file6/file2\x00', 0x0, 0x0) + +# Moves file2 to make it a disconnected directory. + +renameat2(0xffffffffffffff9c, &AUTO='./file0/file1/file2\x00', 0xffffffffffffff9c, &AUTO='./file0/file2\x00', 0x0) + +# Creates a ruleset with read and refer restrictions. + +r1 = landlock_create_ruleset(&AUTO={0x2004, 0x0, 0x0}, AUTO, 0x0) + +# Adds a rule to allow read on one side of the rename. This is an optional call +# useful to extend coverage of collect_domain_accesses(). + +r2 = openat$dir(0xffffffffffffff9c, &AUTO='./file0/file2/file3/file4\x00', 0x0, 0x0) +landlock_add_rule$LANDLOCK_RULE_PATH_BENEATH(r1, AUTO, &AUTO={0x4, r2}, 0x0) + +prctl$PR_SET_NO_NEW_PRIVS(0x26, 0x1) +landlock_restrict_self(r1, 0x0) + +# Tries to open and rename a file from the disconnected directory. + +openat(r0, &AUTO='file3/file5\x00', 0x0, 0x0) # EACCES +renameat2(r0, &AUTO='file3/file5\x00', r0, &AUTO='file3/file4/file5\x00', 0x0) # EXDEV |