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-rw-r--r--src/libstore/store-api.cc4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/libstore/store-api.cc b/src/libstore/store-api.cc
index f5608d384..3bb9db0b7 100644
--- a/src/libstore/store-api.cc
+++ b/src/libstore/store-api.cc
@@ -97,6 +97,10 @@ void checkStoreName(const string & name)
reasons (e.g., "." and ".."). */
if (string(name, 0, 1) == ".")
throw Error(baseError % "it is illegal to start the name with a period");
+ /* Disallow names longer than 211 characters. ext4’s max is 256,
+ but we need extra space for the hash and .chroot extensions. */
+ if (name.length() > 211)
+ throw Error(baseError % "name must be less than 212 characters");
for (auto & i : name)
if (!((i >= 'A' && i <= 'Z') ||
(i >= 'a' && i <= 'z') ||