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Fix GCC 12 compilation errors

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Squelch false positives reported by GCC 12 with UBSan.

Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: szubersk <szuberskidamian@gmail.com>
Closes #14150
This commit is contained in:
szubersk 2022-11-30 20:27:28 +10:00 committed by Brian Behlendorf
parent 3a6d89ae52
commit 3c1e1933b6
9 changed files with 125 additions and 4 deletions
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2
cmd/zfs/zfs_main.c
View File

@ -548,7 +548,7 @@ usage(boolean_t requested)
show_properties = B_TRUE;
if (show_properties) {
(void) fprintf(fp,
(void) fprintf(fp, "%s",
gettext("\nThe following properties are supported:\n"));
(void) fprintf(fp, "\n\t%-14s %s %s %s\n\n",

2
cmd/zpool/zpool_main.c
View File

@ -548,7 +548,7 @@ usage(boolean_t requested)
(strcmp(current_command->name, "get") == 0) ||
(strcmp(current_command->name, "list") == 0))) {
(void) fprintf(fp,
(void) fprintf(fp, "%s",
gettext("\nthe following properties are supported:\n"));
(void) fprintf(fp, "\n\t%-19s %s %s\n\n",

56
config/always-compiler-options.m4
View File

@ -227,6 +227,62 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_INFINITE_RECURSION], [
AC_SUBST([INFINITE_RECURSION])
])
dnl #
dnl # Check if kernel cc supports -Winfinite-recursion option.
dnl #
AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_KERNEL_CC_INFINITE_RECURSION], [
AC_MSG_CHECKING([whether $KERNEL_CC supports -Winfinite-recursion])
saved_cc="$CC"
saved_flags="$CFLAGS"
CC="gcc"
CFLAGS="$CFLAGS -Werror -Winfinite-recursion"
AS_IF([ test -n "$KERNEL_CC" ], [
CC="$KERNEL_CC"
])
AS_IF([ test -n "$KERNEL_LLVM" ], [
CC="clang"
])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [
KERNEL_INFINITE_RECURSION=-Winfinite-recursion
AC_DEFINE([HAVE_KERNEL_INFINITE_RECURSION], 1,
[Define if compiler supports -Winfinite-recursion])
AC_MSG_RESULT([yes])
], [
KERNEL_INFINITE_RECURSION=
AC_MSG_RESULT([no])
])
CC="$saved_cc"
CFLAGS="$saved_flags"
AC_SUBST([KERNEL_INFINITE_RECURSION])
])
dnl #
dnl # Check if cc supports -Wformat-overflow option.
dnl #
AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_FORMAT_OVERFLOW], [
AC_MSG_CHECKING([whether $CC supports -Wformat-overflow])
saved_flags="$CFLAGS"
CFLAGS="$CFLAGS -Werror -Wformat-overflow"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [
FORMAT_OVERFLOW=-Wformat-overflow
AC_DEFINE([HAVE_FORMAT_OVERFLOW], 1,
[Define if compiler supports -Wformat-overflow])
AC_MSG_RESULT([yes])
], [
FORMAT_OVERFLOW=
AC_MSG_RESULT([no])
])
CFLAGS="$saved_flags"
AC_SUBST([FORMAT_OVERFLOW])
])
dnl #
dnl # Check if cc supports -fno-omit-frame-pointer option.
dnl #

2
config/zfs-build.m4
View File

@ -211,10 +211,12 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS], [
ZFS_AC_CONFIG_ALWAYS_CC_NO_CLOBBERED
ZFS_AC_CONFIG_ALWAYS_CC_INFINITE_RECURSION
ZFS_AC_CONFIG_ALWAYS_KERNEL_CC_INFINITE_RECURSION
ZFS_AC_CONFIG_ALWAYS_CC_IMPLICIT_FALLTHROUGH
ZFS_AC_CONFIG_ALWAYS_CC_FRAME_LARGER_THAN
ZFS_AC_CONFIG_ALWAYS_CC_NO_FORMAT_TRUNCATION
ZFS_AC_CONFIG_ALWAYS_CC_NO_FORMAT_ZERO_LENGTH
ZFS_AC_CONFIG_ALWAYS_CC_FORMAT_OVERFLOW
ZFS_AC_CONFIG_ALWAYS_CC_NO_OMIT_FRAME_POINTER
ZFS_AC_CONFIG_ALWAYS_CC_NO_IPA_SRA
ZFS_AC_CONFIG_ALWAYS_CC_ASAN

15
lib/libnvpair/libnvpair.c
View File

@ -199,6 +199,17 @@ nvprint_##type_and_variant(nvlist_prtctl_t pctl, void *private, \
return (1); \
}
/*
* Workaround for GCC 12+ with UBSan enabled deficencies.
*
* GCC 12+ invoked with -fsanitize=undefined incorrectly reports the code
* below as violating -Wformat-overflow.
*/
#if defined(__GNUC__) && !defined(__clang__) && \
defined(ZFS_UBSAN_ENABLED) && defined(HAVE_FORMAT_OVERFLOW)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wformat-overflow"
#endif
NVLIST_PRTFUNC(boolean, int, int, "%d")
NVLIST_PRTFUNC(boolean_value, boolean_t, int, "%d")
NVLIST_PRTFUNC(byte, uchar_t, uchar_t, "0x%2.2x")
@ -213,6 +224,10 @@ NVLIST_PRTFUNC(uint64, uint64_t, u_longlong_t, "0x%llx")
NVLIST_PRTFUNC(double, double, double, "0x%f")
NVLIST_PRTFUNC(string, char *, char *, "%s")
NVLIST_PRTFUNC(hrtime, hrtime_t, hrtime_t, "0x%llx")
#if defined(__GNUC__) && !defined(__clang__) && \
defined(ZFS_UBSAN_ENABLED) && defined(HAVE_FORMAT_OVERFLOW)
#pragma GCC diagnostic pop
#endif
/*
* Generate functions to print array-valued nvlist members.

30
lib/libzfs/libzfs_sendrecv.c
View File

@ -1007,8 +1007,23 @@ send_print_verbose(FILE *fout, const char *tosnap, const char *fromsnap,
(void) fprintf(fout, dgettext(TEXT_DOMAIN,
"incremental\t%s\t%s"), fromsnap, tosnap);
} else {
/*
* Workaround for GCC 12+ with UBSan enabled deficencies.
*
* GCC 12+ invoked with -fsanitize=undefined incorrectly reports the code
* below as violating -Wformat-overflow.
*/
#if defined(__GNUC__) && !defined(__clang__) && \
defined(ZFS_UBSAN_ENABLED) && defined(HAVE_FORMAT_OVERFLOW)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wformat-overflow"
#endif
(void) fprintf(fout, dgettext(TEXT_DOMAIN,
"full\t%s"), tosnap);
#if defined(__GNUC__) && !defined(__clang__) && \
defined(ZFS_UBSAN_ENABLED) && defined(HAVE_FORMAT_OVERFLOW)
#pragma GCC diagnostic pop
#endif
}
(void) fprintf(fout, "\t%llu", (longlong_t)size);
} else {
@ -1028,8 +1043,23 @@ send_print_verbose(FILE *fout, const char *tosnap, const char *fromsnap,
if (size != 0) {
char buf[16];
zfs_nicebytes(size, buf, sizeof (buf));
/*
* Workaround for GCC 12+ with UBSan enabled deficencies.
*
* GCC 12+ invoked with -fsanitize=undefined incorrectly reports the code
* below as violating -Wformat-overflow.
*/
#if defined(__GNUC__) && !defined(__clang__) && \
defined(ZFS_UBSAN_ENABLED) && defined(HAVE_FORMAT_OVERFLOW)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wformat-overflow"
#endif
(void) fprintf(fout, dgettext(TEXT_DOMAIN,
" estimated size is %s"), buf);
#if defined(__GNUC__) && !defined(__clang__) && \
defined(ZFS_UBSAN_ENABLED) && defined(HAVE_FORMAT_OVERFLOW)
#pragma GCC diagnostic pop
#endif
}
}
(void) fprintf(fout, "\n");

2
module/icp/algs/blake3/blake3.c
View File

@ -276,7 +276,7 @@ static size_t compress_parents_parallel(const blake3_ops_t *ops,
const uint8_t *child_chaining_values, size_t num_chaining_values,
const uint32_t key[8], uint8_t flags, uint8_t *out)
{
const uint8_t *parents_array[MAX_SIMD_DEGREE_OR_2];
const uint8_t *parents_array[MAX_SIMD_DEGREE_OR_2] = {0};
size_t parents_array_len = 0;
while (num_chaining_values - (2 * parents_array_len) >= 2) {

3
module/lua/ldo.c
View File

@ -170,7 +170,8 @@ static void seterrorobj (lua_State *L, int errcode, StkId oldtop) {
/*
* Silence infinite recursion warning which was added to -Wall in gcc 12.1
*/
#if defined(HAVE_INFINITE_RECURSION)
#if defined(__GNUC__) && !defined(__clang__) && \
defined(HAVE_KERNEL_INFINITE_RECURSION)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Winfinite-recursion"
#endif

17
module/os/linux/zfs/zio_crypt.c
View File

@ -229,7 +229,24 @@ zio_crypt_key_init(uint64_t crypt, zio_crypt_key_t *key)
ASSERT(key != NULL);
ASSERT3U(crypt, <, ZIO_CRYPT_FUNCTIONS);
/*
* Workaround for GCC 12+ with UBSan enabled deficencies.
*
* GCC 12+ invoked with -fsanitize=undefined incorrectly reports the code
* below as violating -Warray-bounds
*/
#if defined(__GNUC__) && !defined(__clang__) && \
((!defined(_KERNEL) && defined(ZFS_UBSAN_ENABLED)) || \
defined(CONFIG_UBSAN))
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Warray-bounds"
#endif
keydata_len = zio_crypt_table[crypt].ci_keylen;
#if defined(__GNUC__) && !defined(__clang__) && \
((!defined(_KERNEL) && defined(ZFS_UBSAN_ENABLED)) || \
defined(CONFIG_UBSAN))
#pragma GCC diagnostic pop
#endif
memset(key, 0, sizeof (zio_crypt_key_t));
rw_init(&key->zk_salt_lock, NULL, RW_DEFAULT, NULL);