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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: [email protected] ReportedBy: [email protected] CC: [email protected] 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. -- Configure bugmail: http://bugs.exim.org/userprefs.cgi?tab=email -- ## List details at https://lists.exim.org/mailman/listinfo/exim-dev Exim details at http://www.exim.org/ ##
