Use the correct sizeof() in BufFileLoadBuffer The sizeof() call should reference buffer.data, because that's the buffer we're reading data into, not the whole PGAlignedBuffer union. This was introduced by 44cac93464, which replaced the simple buffer with a PGAlignedBuffer field.
It's benign, because the buffer is the largest field of the union, so the sizes are the same. But it's easy to trip over this in a patch, so fix and backpatch. Commit 44cac93464 went into 12, but that's EOL. Backpatch-through: 13 Discussion: https://postgr.es/m/928bdab1-6567-449f-98c4-339cd2203...@vondra.me Branch ------ REL_13_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/88d322a160e3e648406ffa692b0988c1b0fe2db8 Modified Files -------------- src/backend/storage/file/buffile.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)