Fix GCC and Clang errors on Ubuntu 22.10

Make the code compile on Ubuntu Kinetic.

- Clang 15 doesn't support `-fno-ipa-sra` anymore.

- Squelch false positives.

Signed-off-by: szubersk <[email protected]>

Author: szubersk

cmd/zfs/zfs_main.c

@@ -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",

cmd/zpool/zpool_main.c

@@ -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",

config/Rules.am

@@ -39,6 +39,7 @@ AM_CPPFLAGS += -DSYSCONFDIR=\"$(sysconfdir)\"
 AM_CPPFLAGS += -DPKGDATADIR=\"$(pkgdatadir)\"
 AM_CPPFLAGS += $(DEBUG_CPPFLAGS)
 AM_CPPFLAGS += $(CODE_COVERAGE_CPPFLAGS)
+AM_CPPFLAGS += $(FORMAT_OVERFLOW_SUPPORTED)
 AM_CPPFLAGS += -DTEXT_DOMAIN=\"zfs-@ac_system_l@-user\"
 
 AM_CPPFLAGS_NOCHECK  = -D"strtok(...)=strtok(__VA_ARGS__) __attribute__((deprecated(\"Use strtok_r(3) instead!\")))"

config/always-compiler-options.m4

@@ -227,6 +227,27 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_INFINITE_RECURSION], [
 	AC_SUBST([INFINITE_RECURSION])
 ])
 
+dnl #
+dnl # Check if cc supports -Wformat-overflow option.
+dnl #
+AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_FORMAT_OVERFLOW_SUPPORTED], [
+	AC_MSG_CHECKING([whether $CC supports -Wformat-overflow])
+
+	saved_flags="$CFLAGS"
+	CFLAGS="$CFLAGS -Werror -Wformat-overflow"
+
+	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [
+		FORMAT_OVERFLOW_SUPPORTED=-DZFS_GCC_FORMAT_OVERFLOW_SUPPORTED
+		AC_MSG_RESULT([yes])
+	], [
+		FORMAT_OVERFLOW_SUPPORTED=
+		AC_MSG_RESULT([no])
+	])
+
+	CFLAGS="$saved_flags"
+	AC_SUBST([FORMAT_OVERFLOW_SUPPORTED])
+])
+
 dnl #
 dnl # Check if cc supports -fno-omit-frame-pointer option.
 dnl #
@@ -268,3 +289,33 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_CC_NO_IPA_SRA], [
 	CFLAGS="$saved_flags"
 	AC_SUBST([NO_IPA_SRA])
 ])
+
+dnl #
+dnl # Check if kernel cc supports -fno-ipa-sra option.
+dnl #
+AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_KERNEL_CC_NO_IPA_SRA], [
+	AC_MSG_CHECKING([whether $KERNEL_CC supports -fno-ipa-sra])
+
+	saved_cc="$CC"
+	saved_flags="$CFLAGS"
+	CFLAGS="$CFLAGS -Werror -fno-ipa-sra"
+
+	AS_IF([ test -n "$KERNEL_CC" ], [
+		CC="$KERNEL_CC"
+	])
+	AS_IF([ test -n "$KERNEL_LLVM" ], [
+		CC="clang"
+	])
+
+	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [
+		KERNEL_NO_IPA_SRA=-fno-ipa-sra
+		AC_MSG_RESULT([yes])
+	], [
+		KERNEL_NO_IPA_SRA=
+		AC_MSG_RESULT([no])
+	])
+
+	CC="$saved_cc"
+	CFLAGS="$saved_flags"
+	AC_SUBST([NO_IPA_SRA])
+])

config/zfs-build.m4

@@ -81,7 +81,7 @@ AC_DEFUN([ZFS_AC_DEBUG], [
 AC_DEFUN([ZFS_AC_DEBUGINFO_ENABLE], [
 	DEBUG_CFLAGS="$DEBUG_CFLAGS -g -fno-inline $NO_IPA_SRA"
 
-	KERNEL_DEBUG_CFLAGS="$KERNEL_DEBUG_CFLAGS -fno-inline $NO_IPA_SRA"
+	KERNEL_DEBUG_CFLAGS="$KERNEL_DEBUG_CFLAGS -fno-inline $KERNEL_NO_IPA_SRA"
 	KERNEL_MAKE="$KERNEL_MAKE CONFIG_DEBUG_INFO=y"
 
 	DEBUGINFO_ZFS="_with_debuginfo"
@@ -215,8 +215,10 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS], [
 	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_SUPPORTED
 	ZFS_AC_CONFIG_ALWAYS_CC_NO_OMIT_FRAME_POINTER
 	ZFS_AC_CONFIG_ALWAYS_CC_NO_IPA_SRA
+	ZFS_AC_CONFIG_ALWAYS_KERNEL_CC_NO_IPA_SRA
 	ZFS_AC_CONFIG_ALWAYS_CC_ASAN
 	ZFS_AC_CONFIG_ALWAYS_CC_UBSAN
 	ZFS_AC_CONFIG_ALWAYS_TOOLCHAIN_SIMD

lib/libnvpair/libnvpair.c

@@ -199,6 +199,11 @@ nvprint_##type_and_variant(nvlist_prtctl_t pctl, void *private, \
 	return (1); \
 }
 
+#if defined(__GNUC__) && !defined(__clang__) && \
+    defined(ZFS_GCC_FORMAT_OVERFLOW_SUPPORTED)
+#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 +218,9 @@ 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__)
+#pragma GCC diagnostic pop
+#endif
 
 /*
  * Generate functions to print array-valued nvlist members.

lib/libzfs/libzfs_sendrecv.c

@@ -1007,8 +1007,17 @@ 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 {
+#if defined(__GNUC__) && !defined(__clang__) && \
+	defined(ZFS_GCC_FORMAT_OVERFLOW_SUPPORTED)
+#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_GCC_FORMAT_OVERFLOW_SUPPORTED)
+#pragma GCC diagnostic pop
+#endif
 		}
 		(void) fprintf(fout, "\t%llu", (longlong_t)size);
 	} else {
@@ -1028,8 +1037,17 @@ send_print_verbose(FILE *fout, const char *tosnap, const char *fromsnap,
 		if (size != 0) {
 			char buf[16];
 			zfs_nicebytes(size, buf, sizeof (buf));
+#if defined(__GNUC__) && !defined(__clang__) && \
+	defined(ZFS_GCC_FORMAT_OVERFLOW_SUPPORTED)
+#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_GCC_FORMAT_OVERFLOW_SUPPORTED)
+#pragma GCC diagnostic pop
+#endif
 		}
 	}
 	(void) fprintf(fout, "\n");

module/icp/algs/blake3/blake3.c

@@ -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) {

module/os/linux/zfs/zio_crypt.c

@@ -229,7 +229,14 @@ zio_crypt_key_init(uint64_t crypt, zio_crypt_key_t *key)
 	ASSERT(key != NULL);
 	ASSERT3U(crypt, <, ZIO_CRYPT_FUNCTIONS);
 
+#if defined(__GNUC__) && !defined(__clang__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Warray-bounds"
+#endif
 	keydata_len = zio_crypt_table[crypt].ci_keylen;
+#if defined(__GNUC__) && !defined(__clang__)
+#pragma GCC diagnostic pop
+#endif
 	memset(key, 0, sizeof (zio_crypt_key_t));
 	rw_init(&key->zk_salt_lock, NULL, RW_DEFAULT, NULL);