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http://bugs.exim.org/show_bug.cgi?id=1145
Summary: Many warnings while compiled with clang 2.9
Product: Exim
Version: 4.76
Platform: x86
URL: http://sevlush.net
OS/Version: FreeBSD
Status: NEW
Keywords: work:small
Severity: security
Priority: low
Component: Unfiled
AssignedTo: nigel@???
ReportedBy: 1099511627776@???
CC: exim-dev@???
While compiling with clang:
clang version 2.9 (tags/RELEASE_29/final)
Target: i386-portbld-freebsd7.2
Thread model: posix
exim produces many warnings. Here thay are:
=================
clang mime.c
mime.c:344:48: warning: comparison of unsigned expression < 0 is always false
[-Wtautological-compare]
if (fclose(decode_file) != 0 || size_counter < 0)
~~~~~~~~~~~~ ^ ~
1 warning generated.
=================
store.c:179:3: warning: expression result unused [-Wunused-value]
VALGRIND_MAKE_MEM_NOACCESS(next_yield[store_pool], yield_length[store_pool]);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from store.c:44:
./memcheck.h:110:5: note: instantiated from:
VALGRIND_DO_CLIENT_REQUEST_EXPR(0 /* default return */, \
^
store.c:179:3: note: instantiated from:
VALGRIND_MAKE_MEM_NOACCESS(next_yield[store_pool], yield_length[store_pool]);
^
In file included from store.c:44:
./memcheck.h:110:37: note: instantiated from:
VALGRIND_DO_CLIENT_REQUEST_EXPR(0 /* default return */, \
^
store.c:204:1: warning: expression result unused [-Wunused-value]
VALGRIND_MAKE_MEM_UNDEFINED(store_last_get[store_pool], size);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from store.c:44:
./memcheck.h:117:5: note: instantiated from:
VALGRIND_DO_CLIENT_REQUEST_EXPR(0 /* default return */, \
^
store.c:204:1: note: instantiated from:
VALGRIND_MAKE_MEM_UNDEFINED(store_last_get[store_pool], size);
^
In file included from store.c:44:
./memcheck.h:117:37: note: instantiated from:
VALGRIND_DO_CLIENT_REQUEST_EXPR(0 /* default return */, \
^
store.c:299:1: warning: expression result unused [-Wunused-value]
VALGRIND_MAKE_MEM_UNDEFINED(ptr + oldsize, inc);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from store.c:44:
./memcheck.h:117:5: note: instantiated from:
VALGRIND_DO_CLIENT_REQUEST_EXPR(0 /* default return */, \
^
store.c:299:1: note: instantiated from:
VALGRIND_MAKE_MEM_UNDEFINED(ptr + oldsize, inc);
^
In file included from store.c:44:
./memcheck.h:117:37: note: instantiated from:
VALGRIND_DO_CLIENT_REQUEST_EXPR(0 /* default return */, \
^
store.c:372:3: warning: expression result unused [-Wunused-value]
VALGRIND_MAKE_MEM_NOACCESS((char *)b + ALIGNED_SIZEOF_STOREBLOCK, b->length -
ALIGNED_SIZEOF_STOREBLOCK);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from store.c:44:
./memcheck.h:110:5: note: instantiated from:
VALGRIND_DO_CLIENT_REQUEST_EXPR(0 /* default return */, \
^
store.c:372:3: note: instantiated from:
VALGRIND_MAKE_MEM_NOACCESS((char *)b + ALIGNED_SIZEOF_STOREBLOCK, b->length -
ALIGNED_SIZEOF_STOREBLOCK);
^
In file included from store.c:44:
./memcheck.h:110:37: note: instantiated from:
VALGRIND_DO_CLIENT_REQUEST_EXPR(0 /* default return */, \
^
store.c:358:1: warning: expression result unused [-Wunused-value]
VALGRIND_MAKE_MEM_NOACCESS(ptr, newlength);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from store.c:44:
./memcheck.h:110:5: note: instantiated from:
VALGRIND_DO_CLIENT_REQUEST_EXPR(0 /* default return */, \
^
store.c:358:1: note: instantiated from:
VALGRIND_MAKE_MEM_NOACCESS(ptr, newlength);
^
In file included from store.c:44:
./memcheck.h:110:37: note: instantiated from:
VALGRIND_DO_CLIENT_REQUEST_EXPR(0 /* default return */, \
^
5 warnings generated.
==========================
clang queue.c
queue.c:615:5: warning: array index of '16' indexes past the end of an array
(that contains 1 elements) [-Warray-bounds]
f->text[SPOOL_NAME_LENGTH-2] = 0;
^ ~~~~~~~~~~~~~~~~~~~
===========================
clang host.c
host.c:2477:39: warning: use of '%n' in format string discouraged (potentially
insecure) [-Wformat-security]
(void)sprintf(CS buffer, "_%s._tcp.%n%.256s", srv_service, &prefix_length,
~^
1 warning generated.
============================
clang filter.c
filter.c:1036:7: warning: array index of '1' indexes past the end of an array
(that contains 1 elements) [-Warray-bounds]
new->args[1] = second_argument;
^ ~
filter.c:41:18: note: array 'args' declared here
union argtypes args[1];
^
filter.c:2337:13: warning: array index of '11' indexes past the end of an array
(that contains 1 elements) [-Warray-bounds]
commands->args[mailarg_index_once_repeat]);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~
filter.c:41:18: note: array 'args' declared here
union argtypes args[1];
^
2 warnings generated.
==============================
clang exim.c
exim.c:337:35: warning: conversion specifies type 'unsigned long' but the
argument has type 'time_t' (aka 'int') [-Wformat]
debug_printf("tick check: %lu.%06lu %lu.%06lu\n",
~~^
%d
exim.c:337:45: warning: conversion specifies type 'unsigned long' but the
argument has type 'time_t' (aka 'int') [-Wformat]
debug_printf("tick check: %lu.%06lu %lu.%06lu\n",
~~^
%d
exim.c:339:31: warning: conversion specifies type 'unsigned long' but the
argument has type 'time_t' (aka 'int') [-Wformat]
debug_printf("waiting %lu.%06lu\n", itval.it_value.tv_sec,
~~^ ~~~~~~~~~~~~~~~~~~~~~
%d
exim.c:913:33: warning: conversion specifies type 'unsigned long' but the
argument has type 'unsigned int' [-Wformat]
fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
^ ~~~~~~~~~~~~~
========================
clang acl.c
acl.c:2483:31: warning: use of '%n' in format string discouraged (potentially
insecure) [-Wformat-security]
debug_printf("check %s%s %n",
~^
1 warning generated.
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