Avoid possible overflow with ltsGetFreeBlock() in logtape.c nFreeBlocks, defined as a long, stores the number of free blocks in a logical tape. ltsGetFreeBlock() has been using an int to store the value of nFreeBlocks, which could lead to overflows on platforms where long and int are not the same size (in short everything except Windows where long is 4 bytes).
The problematic intermediate variable is switched to be a long instead of an int. Issue introduced by c02fdc9223015, so backpatch down to 13. Author: Ranier vilela Reviewed-by: Peter Geoghegan, David Rowley Discussion: https://postgr.es/m/caeudqapldwcbr_xmwnjgbrdo+f+s4e87x3s7-+hoakqydtc...@mail.gmail.com Backpatch-through: 13 Branch ------ REL_15_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/5180160c177466a319981f68895a14ba4d4eb234 Modified Files -------------- src/backend/utils/sort/logtape.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
