From 8bbdc054043af64add7ac4ec544efb1219d9901d Mon Sep 17 00:00:00 2001 From: Heikki Linnakangas Date: Mon, 10 Aug 2026 06:38:24 -0700 Subject: [PATCH] Use palloc_array() in pltcl and plperl to avoid overflow Some of these could overflow on 32-bit systems with the right input. Convert all cases where we called palloc() with multiplication to fix them. Not all of them were bugs, but it's better to be safe than sorry. Reported-by: Tulya Project, Team Dhiutsa, Bitecope Technologies Private Ltd Backpatch-through: 14 Security: CVE-2026-14677 --- src/pl/plperl/SPI.xs | 6 +++--- src/pl/plperl/plperl.c | 38 +++++++++++++++++++------------------- src/pl/tcl/pltcl.c | 20 ++++++++++---------- 3 files changed, 32 insertions(+), 32 deletions(-) diff --git a/src/pl/plperl/SPI.xs b/src/pl/plperl/SPI.xs index e81432e6341..ba1e93970a8 100644 --- a/src/pl/plperl/SPI.xs +++ b/src/pl/plperl/SPI.xs @@ -75,7 +75,7 @@ spi_spi_prepare(sv, ...) char* query = sv2cstr(sv); if (items < 1) Perl_croak(aTHX_ "Usage: spi_prepare(query, ...)"); - argv = ( SV**) palloc(( items - 1) * sizeof(SV*)); + argv = palloc_array(SV*, items - 1); for ( i = 1; i < items; i++) argv[i - 1] = ST(i); RETVAL = plperl_spi_prepare(query, items - 1, argv); @@ -103,7 +103,7 @@ spi_spi_exec_prepared(sv, ...) offset++; } argc = items - offset; - argv = ( SV**) palloc( argc * sizeof(SV*)); + argv = palloc_array(SV*, argc); for ( i = 0; offset < items; offset++, i++) argv[i] = ST(offset); ret_hash = plperl_spi_exec_prepared(query, attr, argc, argv); @@ -123,7 +123,7 @@ spi_spi_query_prepared(sv, ...) if ( items < 1) Perl_croak(aTHX_ "Usage: spi_query_prepared(query, " "[\\@bind_values])"); - argv = ( SV**) palloc(( items - 1) * sizeof(SV*)); + argv = palloc_array(SV*, items - 1); for ( i = 1; i < items; i++) argv[i - 1] = ST(i); RETVAL = plperl_spi_query_prepared(query, items - 1, argv); diff --git a/src/pl/plperl/plperl.c b/src/pl/plperl/plperl.c index d1751c3124c..3638d62a85e 100644 --- a/src/pl/plperl/plperl.c +++ b/src/pl/plperl/plperl.c @@ -1080,8 +1080,8 @@ plperl_build_tuple_result(HV *perlhash, TupleDesc td) HE *he; HeapTuple tup; - values = palloc0(sizeof(Datum) * td->natts); - nulls = palloc(sizeof(bool) * td->natts); + values = palloc0_array(Datum, td->natts); + nulls = palloc_array(bool, td->natts); memset(nulls, true, sizeof(bool) * td->natts); hv_iterinit(perlhash); @@ -1504,7 +1504,7 @@ plperl_ref_from_pg_array(Datum arg, Oid typid) * Currently we make no effort to cache any of the stuff we look up here, * which is bad. */ - info = palloc0(sizeof(plperl_array_info)); + info = palloc0_object(plperl_array_info); /* get element type information, including output conversion function */ get_type_io_data(elementtype, IOFunc_output, @@ -1540,7 +1540,7 @@ plperl_ref_from_pg_array(Datum arg, Oid typid) &nitems); /* Get total number of elements in each dimension */ - info->nelems = palloc(sizeof(int) * info->ndims); + info->nelems = palloc_array(int, info->ndims); info->nelems[0] = nitems; for (i = 1; i < info->ndims; i++) info->nelems[i] = info->nelems[i - 1] / dims[i - 1]; @@ -1790,9 +1790,9 @@ plperl_modify_tuple(HV *hvTD, TriggerData *tdata, HeapTuple otup) tupdesc = tdata->tg_relation->rd_att; natts = tupdesc->natts; - modvalues = (Datum *) palloc0(natts * sizeof(Datum)); - modnulls = (bool *) palloc0(natts * sizeof(bool)); - modrepls = (bool *) palloc0(natts * sizeof(bool)); + modvalues = palloc0_array(Datum, natts); + modnulls = palloc0_array(bool, natts); + modrepls = palloc0_array(bool, natts); hv_iterinit(hvNew); while ((he = hv_iternext(hvNew))) @@ -2803,7 +2803,7 @@ compile_plperl_function(Oid fn_oid, bool is_trigger, bool is_event_trigger) * struct prodesc and subsidiary data must all live in proc_cxt. ************************************************************/ oldcontext = MemoryContextSwitchTo(proc_cxt); - prodesc = (plperl_proc_desc *) palloc0(sizeof(plperl_proc_desc)); + prodesc = palloc0_object(plperl_proc_desc); prodesc->proname = pstrdup(NameStr(procStruct->proname)); MemoryContextSetIdentifier(proc_cxt, prodesc->proname); prodesc->fn_cxt = proc_cxt; @@ -2811,9 +2811,9 @@ compile_plperl_function(Oid fn_oid, bool is_trigger, bool is_event_trigger) prodesc->fn_xmin = HeapTupleHeaderGetRawXmin(procTup->t_data); prodesc->fn_tid = procTup->t_self; prodesc->nargs = procStruct->pronargs; - prodesc->arg_out_func = (FmgrInfo *) palloc0(prodesc->nargs * sizeof(FmgrInfo)); - prodesc->arg_is_rowtype = (bool *) palloc0(prodesc->nargs * sizeof(bool)); - prodesc->arg_arraytype = (Oid *) palloc0(prodesc->nargs * sizeof(Oid)); + prodesc->arg_out_func = palloc0_array(FmgrInfo, prodesc->nargs); + prodesc->arg_is_rowtype = palloc0_array(bool, prodesc->nargs); + prodesc->arg_arraytype = palloc0_array(Oid, prodesc->nargs); MemoryContextSwitchTo(oldcontext); /* Remember if function is STABLE/IMMUTABLE */ @@ -3599,13 +3599,13 @@ plperl_spi_prepare(char *query, int argc, SV **argv) "PL/Perl spi_prepare query", ALLOCSET_SMALL_SIZES); MemoryContextSwitchTo(plan_cxt); - qdesc = (plperl_query_desc *) palloc0(sizeof(plperl_query_desc)); + qdesc = palloc0_object(plperl_query_desc); snprintf(qdesc->qname, sizeof(qdesc->qname), "%p", qdesc); qdesc->plan_cxt = plan_cxt; qdesc->nargs = argc; - qdesc->argtypes = (Oid *) palloc(argc * sizeof(Oid)); - qdesc->arginfuncs = (FmgrInfo *) palloc(argc * sizeof(FmgrInfo)); - qdesc->argtypioparams = (Oid *) palloc(argc * sizeof(Oid)); + qdesc->argtypes = palloc_array(Oid, argc); + qdesc->arginfuncs = palloc_array(FmgrInfo, argc); + qdesc->argtypioparams = palloc_array(Oid, argc); MemoryContextSwitchTo(oldcontext); /************************************************************ @@ -3776,8 +3776,8 @@ plperl_spi_exec_prepared(char *query, HV *attr, int argc, SV **argv) ************************************************************/ if (argc > 0) { - nulls = (char *) palloc(argc); - argvalues = (Datum *) palloc(argc * sizeof(Datum)); + nulls = palloc_array(char, argc); + argvalues = palloc_array(Datum, argc); } else { @@ -3889,8 +3889,8 @@ plperl_spi_query_prepared(char *query, int argc, SV **argv) ************************************************************/ if (argc > 0) { - nulls = (char *) palloc(argc); - argvalues = (Datum *) palloc(argc * sizeof(Datum)); + nulls = palloc_array(char, argc); + argvalues = palloc_array(Datum, argc); } else { diff --git a/src/pl/tcl/pltcl.c b/src/pl/tcl/pltcl.c index c1e75af3bab..48558b34472 100644 --- a/src/pl/tcl/pltcl.c +++ b/src/pl/tcl/pltcl.c @@ -1500,7 +1500,7 @@ compile_pltcl_function(Oid fn_oid, Oid tgreloid, * struct prodesc and subsidiary data must all live in proc_cxt. ************************************************************/ oldcontext = MemoryContextSwitchTo(proc_cxt); - prodesc = (pltcl_proc_desc *) palloc0(sizeof(pltcl_proc_desc)); + prodesc = palloc0_object(pltcl_proc_desc); prodesc->user_proname = pstrdup(NameStr(procStruct->proname)); MemoryContextSetIdentifier(proc_cxt, prodesc->user_proname); prodesc->internal_proname = pstrdup(internal_proname); @@ -1509,8 +1509,8 @@ compile_pltcl_function(Oid fn_oid, Oid tgreloid, prodesc->fn_xmin = HeapTupleHeaderGetRawXmin(procTup->t_data); prodesc->fn_tid = procTup->t_self; prodesc->nargs = procStruct->pronargs; - prodesc->arg_out_func = (FmgrInfo *) palloc0(prodesc->nargs * sizeof(FmgrInfo)); - prodesc->arg_is_rowtype = (bool *) palloc0(prodesc->nargs * sizeof(bool)); + prodesc->arg_out_func = palloc0_array(FmgrInfo, prodesc->nargs); + prodesc->arg_is_rowtype = palloc0_array(bool, prodesc->nargs); MemoryContextSwitchTo(oldcontext); /* Remember if function is STABLE/IMMUTABLE */ @@ -2032,7 +2032,7 @@ pltcl_quote(ClientData cdata, Tcl_Interp *interp, * grow to and initialize pointers ************************************************************/ cp1 = Tcl_GetStringFromObj(objv[1], &length); - tmp = palloc(length * 2 + 1); + tmp = palloc(add_size(mul_size(length, 2), 1)); cp2 = tmp; /************************************************************ @@ -2587,12 +2587,12 @@ pltcl_SPI_prepare(ClientData cdata, Tcl_Interp *interp, "PL/Tcl spi_prepare query", ALLOCSET_SMALL_SIZES); MemoryContextSwitchTo(plan_cxt); - qdesc = (pltcl_query_desc *) palloc0(sizeof(pltcl_query_desc)); + qdesc = palloc0_object(pltcl_query_desc); snprintf(qdesc->qname, sizeof(qdesc->qname), "%p", qdesc); qdesc->nargs = nargs; - qdesc->argtypes = (Oid *) palloc(nargs * sizeof(Oid)); - qdesc->arginfuncs = (FmgrInfo *) palloc(nargs * sizeof(FmgrInfo)); - qdesc->argtypioparams = (Oid *) palloc(nargs * sizeof(Oid)); + qdesc->argtypes = palloc_array(Oid, nargs); + qdesc->arginfuncs = palloc_array(FmgrInfo, nargs); + qdesc->argtypioparams = palloc_array(Oid, nargs); MemoryContextSwitchTo(oldcontext); /************************************************************ @@ -2835,7 +2835,7 @@ pltcl_SPI_execute_plan(ClientData cdata, Tcl_Interp *interp, * Setup the value array for SPI_execute_plan() using * the type specific input functions ************************************************************/ - argvalues = (Datum *) palloc(callObjc * sizeof(Datum)); + argvalues = palloc_array(Datum, callObjc); for (j = 0; j < callObjc; j++) { @@ -3206,7 +3206,7 @@ pltcl_build_tuple_result(Tcl_Interp *interp, Tcl_Obj **kvObjv, int kvObjc, attinmeta = NULL; } - values = (char **) palloc0(tupdesc->natts * sizeof(char *)); + values = palloc0_array(char *, tupdesc->natts); if (kvObjc % 2 != 0) ereport(ERROR,