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gdbm/SOURCES/gdbm-1.17-coverity-fixes.patch

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From 2ff4ae9c745d4b9e6ee36468c81554027f66c35b Mon Sep 17 00:00:00 2001
From: Sergey Poznyakoff <gray@gnu.org>
Date: Fri, 31 Aug 2018 08:26:31 +0000
Subject: Various bugfixes.
* compat/dbmopen.c (ndbm_open_dir_file0): Ignore ENOENT.
* src/falloc.c (push_avail_block): Free temporary storage no matter
what return status.
* src/gdbm.h.in (GDBM_FILE_TRUNCATE_ERROR): New error code.
* src/gdbmdump.c (_gdbm_dump_ascii): Initialize rc.
* src/gdbmerrno.c: Handle new error.code
* src/gdbmload.c (gdbm_load_bdb_dump): Initialize rc
* src/gdbmopen.c (_gdbm_ftruncate): New function.
(gdbm_fd_open): Use _gdbm_ftruncate. Check its return.
* src/gdbmseq.c (gdbm_firstkey): Initialize dsize
* src/gdbmtool.c (command_generator): Check if cmd is NULL.
(shouldn't happen, but anyways).
* src/mmap.c (_gdbm_mapped_lseek): Check for vailidity of the 'whence'
parameter.
* src/systems.h (TRUNCATE): Remove macro.
* src/util.c (vgetyn): Remove unnecessary assignment.
---
diff --git a/compat/dbmopen.c b/compat/dbmopen.c
index b9e7518..0538992 100644
--- a/compat/dbmopen.c
+++ b/compat/dbmopen.c
@@ -87,7 +87,7 @@ ndbm_open_dir_file0 (const char *file_name, int pagfd, int mode)
if ((mode & GDBM_OPENMASK) == GDBM_READER)
/* Ok, try to cope with it. */
return pagfd;
- else
+ else if (errno != ENOENT)
{
gdbm_set_errno (NULL, GDBM_FILE_OPEN_ERROR, TRUE);
return -1;
diff --git a/src/falloc.c b/src/falloc.c
index 09b40d4..7a94afb 100644
--- a/src/falloc.c
+++ b/src/falloc.c
@@ -313,33 +313,43 @@ push_avail_block (GDBM_FILE dbf)
/* Update the header avail count to previous size divided by 2. */
dbf->header->avail.count >>= 1;
- /* Free the unneeded space. */
- new_loc.av_adr += av_size;
- new_loc.av_size -= av_size;
- _gdbm_free (dbf, new_loc.av_adr, new_loc.av_size);
-
- /* Update the disk. */
- file_pos = gdbm_file_seek (dbf, av_adr, SEEK_SET);
- if (file_pos != av_adr)
+ rc = 0;
+ do
{
- GDBM_SET_ERRNO (dbf, GDBM_FILE_SEEK_ERROR, TRUE);
- _gdbm_fatal (dbf, _("lseek error"));
- return -1;
- }
+ /* Free the unneeded space. */
+ new_loc.av_adr += av_size;
+ new_loc.av_size -= av_size;
+ if (_gdbm_free (dbf, new_loc.av_adr, new_loc.av_size))
+ {
+ rc = -1;
+ break;
+ }
+
+ /* Update the disk. */
+ file_pos = gdbm_file_seek (dbf, av_adr, SEEK_SET);
+ if (file_pos != av_adr)
+ {
+ GDBM_SET_ERRNO (dbf, GDBM_FILE_SEEK_ERROR, TRUE);
+ _gdbm_fatal (dbf, _("lseek error"));
+ rc = -1;
+ break;
+ }
- rc = _gdbm_full_write (dbf, temp, av_size);
- if (rc)
- {
- GDBM_DEBUG (GDBM_DEBUG_STORE|GDBM_DEBUG_ERR,
- "%s: error writing avail data: %s",
- dbf->name, gdbm_db_strerror (dbf));
- _gdbm_fatal (dbf, gdbm_db_strerror (dbf));
- return -1;
+ rc = _gdbm_full_write (dbf, temp, av_size);
+ if (rc)
+ {
+ GDBM_DEBUG (GDBM_DEBUG_STORE|GDBM_DEBUG_ERR,
+ "%s: error writing avail data: %s",
+ dbf->name, gdbm_db_strerror (dbf));
+ _gdbm_fatal (dbf, gdbm_db_strerror (dbf));
+ rc = -1;
+ }
}
-
+ while (0);
+
free (temp);
- return 0;
+ return rc;
}
/* AV_TABLE contains COUNT entries sorted by AV_SIZE in ascending order.
diff --git a/src/gdbm.h.in b/src/gdbm.h.in
index 6318ad8..f5eadc5 100644
--- a/src/gdbm.h.in
+++ b/src/gdbm.h.in
@@ -227,9 +227,10 @@ extern int gdbm_copy_meta (GDBM_FILE dst, GDBM_FILE src);
# define GDBM_BAD_DIR_ENTRY 36
# define GDBM_FILE_CLOSE_ERROR 37
# define GDBM_FILE_SYNC_ERROR 38
+# define GDBM_FILE_TRUNCATE_ERROR 39
# define _GDBM_MIN_ERRNO 0
-# define _GDBM_MAX_ERRNO GDBM_FILE_SYNC_ERROR
+# define _GDBM_MAX_ERRNO GDBM_FILE_TRUNCATE_ERROR
/* This one was never used and will be removed in the future */
# define GDBM_UNKNOWN_UPDATE GDBM_UNKNOWN_ERROR
diff --git a/src/gdbmdump.c b/src/gdbmdump.c
index 2e6f5b0..a8c4ec5 100644
--- a/src/gdbmdump.c
+++ b/src/gdbmdump.c
@@ -62,7 +62,7 @@ _gdbm_dump_ascii (GDBM_FILE dbf, FILE *fp)
size_t count = 0;
unsigned char *buffer = NULL;
size_t bufsize = 0;
- int rc;
+ int rc = 0;
fd = gdbm_fdesc (dbf);
if (fstat (fd, &st))
diff --git a/src/gdbmerrno.c b/src/gdbmerrno.c
index 4ce7f9d..6758272 100644
--- a/src/gdbmerrno.c
+++ b/src/gdbmerrno.c
@@ -138,7 +138,8 @@ const char * const gdbm_errlist[_GDBM_MAX_ERRNO+1] = {
[GDBM_BAD_HASH_TABLE] = N_("Malformed hash table"),
[GDBM_BAD_DIR_ENTRY] = N_("Invalid directory entry"),
[GDBM_FILE_CLOSE_ERROR] = N_("Error closing file"),
- [GDBM_FILE_SYNC_ERROR] = N_("Error synchronizing file")
+ [GDBM_FILE_SYNC_ERROR] = N_("Error synchronizing file"),
+ [GDBM_FILE_TRUNCATE_ERROR] = N_("Error truncating file")
};
const char *
@@ -182,7 +183,8 @@ int const gdbm_syserr[_GDBM_MAX_ERRNO+1] = {
[GDBM_FILE_STAT_ERROR] = 1,
[GDBM_BACKUP_FAILED] = 1,
[GDBM_FILE_CLOSE_ERROR] = 1,
- [GDBM_FILE_SYNC_ERROR] = 1
+ [GDBM_FILE_SYNC_ERROR] = 1,
+ [GDBM_FILE_TRUNCATE_ERROR] = 1
};
/* Returns true if system errno value is meaningful for GDBM error
diff --git a/src/gdbmload.c b/src/gdbmload.c
index 008bcb9..f5b7869 100644
--- a/src/gdbmload.c
+++ b/src/gdbmload.c
@@ -542,6 +542,7 @@ gdbm_load_bdb_dump (struct dump_file *file, GDBM_FILE dbf, int replace)
memset (&xd, 0, sizeof (xd));
xs[0] = xs[1] = 0;
i = 0;
+ rc = 0;
while ((c = fgetc (file->fp)) == ' ')
{
rc = xdatum_read (file->fp, &xd[i], &xs[i]);
diff --git a/src/gdbmopen.c b/src/gdbmopen.c
index 908887c..7ec57e7 100644
--- a/src/gdbmopen.c
+++ b/src/gdbmopen.c
@@ -199,6 +199,21 @@ validate_header (gdbm_file_header const *hdr, struct stat const *st)
return 0;
}
+/* Do we have ftruncate? */
+static inline int
+_gdbm_ftruncate (GDBM_FILE dbf)
+{
+#if HAVE_FTRUNCATE
+ return ftruncate (dbf->desc, 0);
+#else
+ int fd;
+ fd = open (dbf->name, O_RDWR|O_TRUNC, mode);
+ if (fd == -1)
+ return -1;
+ return close (fd);
+#endif
+}
+
GDBM_FILE
gdbm_fd_open (int fd, const char *file_name, int block_size,
int flags, void (*fatal_func) (const char *))
@@ -320,14 +335,22 @@ gdbm_fd_open (int fd, const char *file_name, int block_size,
now time to truncate the file. */
if ((flags & GDBM_OPENMASK) == GDBM_NEWDB && file_stat.st_size != 0)
{
- TRUNCATE (dbf);
- if (fstat (dbf->desc, &file_stat))
+ if (_gdbm_ftruncate (dbf))
+ {
+ GDBM_SET_ERRNO2 (dbf, GDBM_FILE_TRUNCATE_ERROR, FALSE,
+ GDBM_DEBUG_OPEN);
+ }
+ else if (fstat (dbf->desc, &file_stat))
+ {
+ GDBM_SET_ERRNO2 (dbf, GDBM_FILE_STAT_ERROR, FALSE, GDBM_DEBUG_OPEN);
+ }
+
+ if (gdbm_last_errno (dbf))
{
if (flags & GDBM_CLOERROR)
close (dbf->desc);
free (dbf->name);
free (dbf);
- GDBM_SET_ERRNO2 (NULL, GDBM_FILE_STAT_ERROR, FALSE, GDBM_DEBUG_OPEN);
return NULL;
}
}
diff --git a/src/gdbmseq.c b/src/gdbmseq.c
index e74d78d..ee7ebf3 100644
--- a/src/gdbmseq.c
+++ b/src/gdbmseq.c
@@ -101,6 +101,7 @@ gdbm_firstkey (GDBM_FILE dbf)
/* Set the default return value for not finding a first entry. */
return_val.dptr = NULL;
+ return_val.dsize = 0;
GDBM_DEBUG (GDBM_DEBUG_READ, "%s: getting first key", dbf->name);
diff --git a/src/gdbmtool.c b/src/gdbmtool.c
index 454465e..8c97e1e 100644
--- a/src/gdbmtool.c
+++ b/src/gdbmtool.c
@@ -1435,7 +1435,7 @@ command_generator (const char *text, int state)
len = strlen (text);
}
- if (!cmd->name)
+ if (!cmd || !cmd->name)
return NULL;
/* Return the next name which partially matches from the command list. */
diff --git a/src/mmap.c b/src/mmap.c
index 48e84ae..148b852 100644
--- a/src/mmap.c
+++ b/src/mmap.c
@@ -367,6 +367,10 @@ _gdbm_mapped_lseek (GDBM_FILE dbf, off_t offset, int whence)
needle = file_size - offset;
break;
}
+
+ default:
+ errno = EINVAL;
+ return -1;
}
if (needle < 0)
diff --git a/src/systems.h b/src/systems.h
index 750aa51..f269060 100644
--- a/src/systems.h
+++ b/src/systems.h
@@ -52,13 +52,6 @@
# define STATBLKSIZE(st) 1024
#endif
-/* Do we have ftruncate? */
-#if HAVE_FTRUNCATE
-# define TRUNCATE(dbf) ftruncate (dbf->desc, 0)
-#else
-# define TRUNCATE(dbf) close( open (dbf->name, O_RDWR|O_TRUNC, mode));
-#endif
-
#ifndef STDERR_FILENO
# define STDERR_FILENO 2
#endif
diff --git a/src/util.c b/src/util.c
index f254202..3493366 100644
--- a/src/util.c
+++ b/src/util.c
@@ -98,8 +98,9 @@ vgetyn (const char *prompt, va_list ap)
default:
fprintf (stdout, "%s\n", _("Please, reply 'y' or 'n'"));
}
- state = 0;
- } else
+ /* fall through */
+ }
+ else
break;
case 0:
--
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