sharpetronics/PostgreSQL
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-06-03 00:02:26 -04:00
Code Issues Projects Releases Wiki Activity

Avoid 0-length memcpy to NULL with EXEC_BACKEND

Browse Source 
memcpy(NULL, src, 0) is forbidden by POSIX, even though every
production version of libc allows it. Let's be tidy.

Per report from Thomas Munro, running UBSan with EXEC_BACKEND.
Backpatch to v17, where this code was added.

Discussion: https://www.postgresql.org/message-id/CA%2BhUKG%2Be-dV7YWBzfBZXsgovgRuX5VmvmOT%2Bv0aXiZJ-EKbXcw@mail.gmail.com
This commit is contained in:
Heikki Linnakangas 2024-07-03 15:58:14 +03:00
parent a06e8f84a1
commit f3412a61f3
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
src/backend/postmaster/launch_backend.c
View File

@ -762,7 +762,8 @@ save_backend_variables(BackendParameters *param, ClientSocket *client_sock,
strlcpy(param->pkglib_path, pkglib_path, MAXPGPATH);
param->startup_data_len = startup_data_len;
memcpy(param->startup_data, startup_data, startup_data_len);
if (startup_data_len > 0)
memcpy(param->startup_data, startup_data, startup_data_len);
return true;
}