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Remove last usage of PATH_MAX and ban its future use

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Remove a number of pointless checks against PATH_MAX and
add a syntax-check rule to prevent its use in future

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
(cherry picked from commit ebbcc0263969cc4472f4aafea8901154c790a196)
This commit is contained in:
Daniel P. Berrange 2012-05-25 14:14:07 +01:00 committed by Cole Robinson
parent 0f031d181f
commit b4bbe640ef
5 changed files with 12 additions and 8 deletions
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5
cfg.mk
View File

@ -397,6 +397,11 @@ sc_prohibit_VIR_ERR_NO_MEMORY:
halt='use virReportOOMError, not V'IR_ERR_NO_MEMORY \ halt='use virReportOOMError, not V'IR_ERR_NO_MEMORY \
$(_sc_search_regexp) $(_sc_search_regexp)
sc_prohibit_PATH_MAX:
@prohibit='\<P''ATH_MAX\>' \
halt='dynamically allocate paths, do not use P'ATH_MAX \
$(_sc_search_regexp)
# Use a subshell for each function, to give the optimal warning message. # Use a subshell for each function, to give the optimal warning message.
include $(srcdir)/Makefile.nonreentrant include $(srcdir)/Makefile.nonreentrant
sc_prohibit_nonreentrant: sc_prohibit_nonreentrant:

4
src/security/virt-aa-helper.c
View File

@ -473,7 +473,7 @@ valid_name(const char *name)
* used to subvert the profile */ * used to subvert the profile */
const char *bad = " /[]*"; const char *bad = " /[]*";
if (strlen(name) == 0 || strlen(name) > PATH_MAX - 1) if (strlen(name) == 0)
return -1; return -1;
if (strcspn(name, bad) != strlen(name)) if (strcspn(name, bad) != strlen(name))
@ -544,7 +544,7 @@ valid_path(const char *path, const bool readonly)
"/sys/devices/pci" /* for hostdev pci devices */ "/sys/devices/pci" /* for hostdev pci devices */
}; };
if (path == NULL || strlen(path) > PATH_MAX - 1) { if (path == NULL) {
vah_error(NULL, 0, _("bad pathname")); vah_error(NULL, 0, _("bad pathname"));
return -1; return -1;
} }

2
src/storage/storage_backend_scsi.c
View File

@ -251,7 +251,7 @@ virStorageBackendSCSINewLun(virStoragePoolObjPtr pool,
goto free_vol; goto free_vol;
} }
if (STREQLEN(devpath, vol->target.path, PATH_MAX) && if (STREQ(devpath, vol->target.path) &&
!(STREQ(pool->def->target.path, "/dev") || !(STREQ(pool->def->target.path, "/dev") ||
STREQ(pool->def->target.path, "/dev/"))) { STREQ(pool->def->target.path, "/dev/"))) {

2
src/xenxs/xen_xm.c
View File

@ -501,8 +501,6 @@ xenParseXM(virConfPtr conf, int xendConfigVersion,
/* Extract the source file path*/ /* Extract the source file path*/
if (!(offset = strchr(head, ','))) if (!(offset = strchr(head, ',')))
goto skipdisk; goto skipdisk;
if ((offset - head) >= (PATH_MAX-1))
goto skipdisk;
if (offset == head) { if (offset == head) {
disk->src = NULL; /* No source file given, eg CDROM with no media */ disk->src = NULL; /* No source file given, eg CDROM with no media */

7
tools/virsh.c
View File

@ -15229,11 +15229,12 @@ editWriteToTempFile (vshControl *ctl, const char *doc)
const char *tmpdir; const char *tmpdir;
int fd; int fd;
ret = vshMalloc(ctl, PATH_MAX);
tmpdir = getenv ("TMPDIR"); tmpdir = getenv ("TMPDIR");
if (!tmpdir) tmpdir = "/tmp"; if (!tmpdir) tmpdir = "/tmp";
snprintf (ret, PATH_MAX, "%s/virshXXXXXX.xml", tmpdir); if (virAsprintf(&ret, "%s/virshXXXXXX.xml", tmpdir) < 0) {
vshError(ctl, "%s", _("out of memory"));
return NULL;
}
fd = mkstemps(ret, 4); fd = mkstemps(ret, 4);
if (fd == -1) { if (fd == -1) {
vshError(ctl, _("mkstemps: failed to create temporary file: %s"), vshError(ctl, _("mkstemps: failed to create temporary file: %s"),