postgres.git / summary / log / commit / refs

commit    0c67dbcc4e39e160bc5c9d7db3b3f011292d5a85
Author:   Michael Paquier <michael@paquier.xyz>
Date:     Thu Dec 11 01:25:51 2025 +0000

    Fix allocation formula in llvmjit_expr.c
    
    An array of LLVMBasicBlockRef is allocated with the size used for an
    element being "LLVMBasicBlockRef *" rather than "LLVMBasicBlockRef".
    LLVMBasicBlockRef is a type that refers to a pointer, so this did not
    directly cause a problem because both should have the same size, still
    it is incorrect.
    
    This issue has been spotted while reviewing a different patch, and
    exists since 2a0faed9d702, so backpatch all the way down.
    
    Discussion: https://postgr.es/m/CA+hUKGLngd9cKHtTUuUdEo2eWEgUcZ_EQRbP55MigV2t_zTReg@mail.gmail.com
    Backpatch-through: 14


 src/backend/jit/llvm/llvmjit_expr.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/backend/jit/llvm/llvmjit_expr.c b/src/backend/jit/llvm/llvmjit_expr.c
index cfb6fe8cffb..8cf2e830efa 100644
--- a/src/backend/jit/llvm/llvmjit_expr.c
+++ b/src/backend/jit/llvm/llvmjit_expr.c
@@ -612,8 +612,8 @@ llvm_compile_expr(ExprState *state)
 						LLVMBuildStore(b, l_sbool_const(1), v_resnullp);
 
 						/* create blocks for checking args, one for each */
-						b_checkargnulls =
-							palloc(sizeof(LLVMBasicBlockRef *) * op->d.func.nargs);
+						b_checkargnulls = (LLVMBasicBlockRef *)
+							palloc(sizeof(LLVMBasicBlockRef) * op->d.func.nargs);
 						for (int argno = 0; argno < op->d.func.nargs; argno++)
 							b_checkargnulls[argno] =
 								l_bb_before_v(b_nonull, "b.%d.isnull.%d", opno,


[parent: 4c4fa53b9d2d]