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570ca4441e
Coverity had various complaints about minor issues. They are all fairly straightforward to understand without reading additional files, with the exception of the draid.c issue. vdev_draid_rand() takes a 128-bit starting seed, but we were passing a pointer to a 64-bit value, which understandably made Coverity complain. This is perhaps the only significant issue fixed in this patch, since it causes stack corruption. These are not all of the issues in the ZTS that Coverity caught, but a number of them are already fixed in other PRs. There is also a class of TOUTOC complaints that involve very minor things in the ZTS (e.g. access() before unlink()). I have yet to decide whether they are false positives (since this is not security sensitive code) or something to cleanup. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Neal Gompa <ngompa@datto.com> Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu> Closes #13943
139 lines
2.9 KiB
C
139 lines
2.9 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or https://opensource.org/licenses/CDDL-1.0.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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/*
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* --------------------------------------------------------------
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* BugId 5047993 : Getting bad read data.
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*
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* Usage: readmmap <filename>
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*
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* where:
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* filename is an absolute path to the file name.
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*
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* Return values:
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* 1 : error
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* 0 : no errors
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* --------------------------------------------------------------
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <sys/mman.h>
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#include <time.h>
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int
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main(int argc, char **argv)
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{
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const char *filename = "badfile";
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size_t size = 4395;
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size_t idx = 0;
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char *buf = NULL;
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char *map = NULL;
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int fd = -1, bytes, retval = 0;
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uint_t seed;
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if (argc < 2 || optind == argc) {
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(void) fprintf(stderr,
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"usage: %s <file name>\n", argv[0]);
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exit(1);
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}
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if ((buf = calloc(1, size)) == NULL) {
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perror("calloc");
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exit(1);
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}
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filename = argv[optind];
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(void) remove(filename);
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fd = open(filename, O_RDWR|O_CREAT|O_TRUNC, 0666);
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if (fd == -1) {
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perror("open to create");
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retval = 1;
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goto end;
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}
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bytes = write(fd, buf, size);
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if (bytes != size) {
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(void) printf("short write: %d != %zd\n", bytes, size);
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retval = 1;
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goto end;
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}
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map = mmap(0, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
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if (map == MAP_FAILED) {
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perror("mmap");
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retval = 1;
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goto end;
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}
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seed = (uint_t)time(NULL);
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srandom(seed);
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idx = random() % size;
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map[idx] = 1;
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if (msync(map, size, MS_SYNC) != 0) {
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perror("msync");
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retval = 1;
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goto end;
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}
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if (munmap(map, size) != 0) {
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perror("munmap");
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retval = 1;
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goto end;
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}
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bytes = pread(fd, buf, size, 0);
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if (bytes != size) {
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(void) printf("short read: %d != %zd\n", bytes, size);
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retval = 1;
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goto end;
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}
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if (buf[idx] != 1) {
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(void) printf(
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"bad data from read! got buf[%zd]=%d, expected 1\n",
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idx, buf[idx]);
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retval = 1;
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goto end;
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}
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(void) printf("good data from read: buf[%zd]=1\n", idx);
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end:
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if (fd != -1) {
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(void) close(fd);
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}
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if (buf != NULL) {
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free(buf);
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}
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return (retval);
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}
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