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Fix bug #12621 with crashes on MS-Windows in LookupAccountSid.

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src/w32.c (get_name_and_id): Always pass NULL as the first argument
 of lookup_account_sid.  Avoids crashes with UNC file names that
 refer to DFS domains, not to specific machine names.  (Bug#12621)
 Remove now unused argument FNAME; all callers changed.
 (get_file_owner_and_group): Remove now unused argument FNAME; all
 callers changed.
This commit is contained in:
Eli Zaretskii 2012-12-14 11:09:36 +02:00
parent 1e20eeb758
commit 92340ec753
2 changed files with 19 additions and 29 deletions
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9
src/ChangeLog
View File

@ -1,3 +1,12 @@
2012-12-14 Eli Zaretskii <eliz@gnu.org>
* w32.c (get_name_and_id): Always pass NULL as the first argument
of lookup_account_sid. Avoids crashes with UNC file names that
refer to DFS domains, not to specific machine names. (Bug#12621)
Remove now unused argument FNAME; all callers changed.
(get_file_owner_and_group): Remove now unused argument FNAME; all
callers changed.
2012-12-11 Eli Zaretskii <eliz@gnu.org>
* search.c (search_buffer): Check the inverse translations of each

39
src/w32.c
View File

@ -3362,8 +3362,7 @@ w32_add_to_cache (PSID sid, unsigned id, char *name)
#define GID 2
static int
get_name_and_id (PSECURITY_DESCRIPTOR psd, const char *fname,
unsigned *id, char *nm, int what)
get_name_and_id (PSECURITY_DESCRIPTOR psd, unsigned *id, char *nm, int what)
{
PSID sid = NULL;
char machine[MAX_COMPUTERNAME_LENGTH+1];
@ -3373,7 +3372,6 @@ get_name_and_id (PSECURITY_DESCRIPTOR psd, const char *fname,
DWORD name_len = sizeof (name);
char domain[1024];
DWORD domain_len = sizeof (domain);
char *mp = NULL;
int use_dflt = 0;
int result;
@ -3388,22 +3386,7 @@ get_name_and_id (PSECURITY_DESCRIPTOR psd, const char *fname,
use_dflt = 1;
else if (!w32_cached_id (sid, id, nm))
{
/* If FNAME is a UNC, we need to lookup account on the
specified machine. */
if (IS_DIRECTORY_SEP (fname[0]) && IS_DIRECTORY_SEP (fname[1])
&& fname[2] != '\0')
{
const char *s;
char *p;
for (s = fname + 2, p = machine;
*s && !IS_DIRECTORY_SEP (*s); s++, p++)
*p = *s;
*p = '\0';
mp = machine;
}
if (!lookup_account_sid (mp, sid, name, &name_len,
if (!lookup_account_sid (NULL, sid, name, &name_len,
domain, &domain_len, &ignore)
|| name_len > UNLEN+1)
use_dflt = 1;
@ -3418,9 +3401,7 @@ get_name_and_id (PSECURITY_DESCRIPTOR psd, const char *fname,
}
static void
get_file_owner_and_group (PSECURITY_DESCRIPTOR psd,
const char *fname,
struct stat *st)
get_file_owner_and_group (PSECURITY_DESCRIPTOR psd, struct stat *st)
{
int dflt_usr = 0, dflt_grp = 0;
@ -3431,9 +3412,9 @@ get_file_owner_and_group (PSECURITY_DESCRIPTOR psd,
}
else
{
if (get_name_and_id (psd, fname, &st->st_uid, st->st_uname, UID))
if (get_name_and_id (psd, &st->st_uid, st->st_uname, UID))
dflt_usr = 1;
if (get_name_and_id (psd, fname, &st->st_gid, st->st_gname, GID))
if (get_name_and_id (psd, &st->st_gid, st->st_gname, GID))
dflt_grp = 1;
}
/* Consider files to belong to current user/group, if we cannot get
@ -3655,19 +3636,19 @@ stat_worker (const char * path, struct stat * buf, int follow_symlinks)
psd = get_file_security_desc_by_handle (fh);
if (psd)
{
get_file_owner_and_group (psd, name, buf);
get_file_owner_and_group (psd, buf);
LocalFree (psd);
}
else if (is_windows_9x () == TRUE)
get_file_owner_and_group (NULL, name, buf);
get_file_owner_and_group (NULL, buf);
else if (!(is_a_symlink && follow_symlinks))
{
psd = get_file_security_desc_by_name (name);
get_file_owner_and_group (psd, name, buf);
get_file_owner_and_group (psd, buf);
xfree (psd);
}
else
get_file_owner_and_group (NULL, name, buf);
get_file_owner_and_group (NULL, buf);
CloseHandle (fh);
}
else
@ -3775,7 +3756,7 @@ stat_worker (const char * path, struct stat * buf, int follow_symlinks)
else
buf->st_mode = S_IFREG;
get_file_owner_and_group (NULL, name, buf);
get_file_owner_and_group (NULL, buf);
}
#if 0