Attachment 1622407 Details for Bug 1758001 – updated reproducer

updated reproducer

compat_statfs.c (text/x-csrc), 2.33 KB, created by Frank Sorenson on 2019-10-03 20:07:14 UTC

(hide)

Description:

Filename:

MIME Type:

Creator: Frank Sorenson

Created: 2019-10-03 20:07:14 UTC

Size: 2.33 KB

patch

obsolete

>/*
>	compat_statfs.c - program to test that compat_statfs64() and compat_fstatfs(),
>	compiled with _FILE_OFFSET_BITS=64, will not overflow 32-bit fields
>
>	Frank Sorenson <sorenson@redhat.com>
>
>	# mount -t tmpfs -o nr_inodes=4294967297 tmpfs /mnt
>	# gcc compat_statfs.c -o compat_statfs -m32 -D_FILE_OFFSET_BITS=64
>	# ./compat_statfs /mnt
>
>	* compile-time error if the correct args are not passed when compiling
>	* test setup error if none of the 64-bit fields would have overflowed
>*/
>
>#include <stdio.h>
>#include <stdlib.h>
>#include <unistd.h>
>#include <inttypes.h>
>#include <sys/vfs.h>
>#include <sys/types.h>
>#include <sys/stat.h>
>#include <fcntl.h>
>
>#if __WORDSIZE != 32 || ! defined _FILE_OFFSET_BITS || _FILE_OFFSET_BITS != 64
>#error "Compile with '-m32 -D_FILE_OFFSET_BITS=64"
>#endif
>
>int output_result(struct statfs stfs) {
>	printf("  block count: 0x%016" PRIx64" (%" PRIu64 ")\n", (uint64_t)stfs.f_blocks, (uint64_t)stfs.f_blocks);
>	printf("  blocks free: 0x%016" PRIx64" (%" PRIu64 ")\n", (uint64_t)stfs.f_bfree, (uint64_t)stfs.f_bfree);
>	printf("  blocks available: 0x%016" PRIx64" (%" PRIu64 ")\n", (uint64_t)stfs.f_bavail, (uint64_t)stfs.f_bavail);
>
>	printf("  file count: 0x%016" PRIx64 " - %" PRIu64 "\n", (uint64_t)stfs.f_files, (uint64_t)stfs.f_files);
>	printf("  files free: 0x%016" PRIx64 " - %" PRIu64 "\n", (uint64_t)stfs.f_ffree, (uint64_t)stfs.f_ffree);
>	if (!
>		((stfs.f_blocks | stfs.f_bfree | stfs.f_bavail |
>		 stfs.f_files | stfs.f_ffree) & __UINT64_C(0xffffffff00000000))) {
>		printf("error in test setup: none of the 64-bit fields would overflow 32 bits\n");
>		return EXIT_FAILURE;
>	}
>	return EXIT_SUCCESS;
>}
>
>int main(int argc, char *argv[]) {
>	struct statfs stfs;
>	int err = 0;
>	int fd;
>
>	if (argc != 2) {
>		printf("usage: %s <path>\n", argv[0]);
>		return EXIT_FAILURE;
>	}
>
>	printf("testing statfs('%s'): ", argv[1]);
>
>	if (statfs(argv[1], &stfs) < 0) {
>		printf("statfs failed: %m\n");
>		err++;
>	} else {
>		printf("statfs succeeded\n");
>		if (output_result(stfs))
>			err++;
>	}
>
>	if ((fd = open(argv[1], O_RDONLY)) < 0) {
>		printf("failed to open '%s': %m\n", argv[1]);
>		err++;
>	} else {
>		printf("testing fstatfs(): ");
>		if (fstatfs(fd, &stfs) < 0) {
>			printf("fstatfs failed: %m\n");
>			err++;
>		} else {
>			close(fd);
>
>			printf("fstatfs succeeded\n");
>			if (output_result(stfs))
>				err++;
>		}
>	}
>	return err ? EXIT_FAILURE : EXIT_SUCCESS;
>}
>
>
>
>

Actions: View

Attachments on bug 1758001: 1622407