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* NEWS, src/newgrp.c: Fix segfault when an user returns to an

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unknown GID (either the user was deleted during the user's newgrp
  session or the user's passwd entry referenced an invalid group).
  Add a syslog warning in that case.
* src/newgrp.c: Add an end of line when reporting an invalid
  password.
This commit is contained in:
nekral-guest 2008-01-21 23:33:43 +00:00
parent b082ebead2
commit ae8cbbc34d
3 changed files with 32 additions and 5 deletions
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9
ChangeLog
View File

@ -1,3 +1,12 @@
2008-01-22 Nicolas François <nicolas.francois@centraliens.net>
* NEWS, src/newgrp.c: Fix segfault when an user returns to an
unknown GID (either the user was deleted during the user's newgrp
session or the user's passwd entry referenced an invalid group).
Add a syslog warning in that case.
* src/newgrp.c: Add an end of line when reporting an invalid
password.
2008-01-12 Nicolas François <nicolas.francois@centraliens.net>
* NEWS, src/useradd.c: Fix the handling of the --defaults option

4
NEWS
View File

@ -26,6 +26,10 @@ shadow-4.1.0 -> shadow-4.1.1 UNRELEASED
- lastlog
* Accept users specified as a numerical UID, or ranges of users (-user,
user-, user1-user2).
- newgrp
* Fix segfault when an user returns to an unknown GID (either the user
was deleted during the user's newgrp session or the user's passwd
entry referenced an invalid group). Add a syslog warning in that case.
- newusers
* The new users are no more added to the list of members of their groups
because the membership is already set by their primary group.

20
src/newgrp.c
View File

@ -169,7 +169,7 @@ static void check_perms (const struct group *grp,
"Invalid password for group `%s' from `%s'",
groupname, pwd->pw_name));
sleep (1);
fputs (_("Invalid password."), stderr);
fputs (_("Invalid password.\n"), stderr);
goto failure;
}
}
@ -252,6 +252,8 @@ static void syslog_sg (const char *name, const char *group)
} else if (child) {
/* parent - wait for child to finish, then log session close */
int cst = 0;
gid_t gid = getgid();
struct group *grp = getgrgid (gid);
do {
errno = 0;
@ -265,10 +267,22 @@ static void syslog_sg (const char *name, const char *group)
} while ((pid == child && WIFSTOPPED (cst)) ||
(pid != child && errno == EINTR));
/* local, no need for xgetgrgid */
if (NULL != grp) {
SYSLOG ((LOG_INFO,
"user `%s' (login `%s' on %s) returned to group `%s'",
name, loginname, tty,
getgrgid (gid)->gr_name));
name, loginname, tty, grp->gr_name));
} else {
SYSLOG ((LOG_INFO,
"user `%s' (login `%s' on %s) returned to group `%d'",
name, loginname, tty, gid));
/* Either the user's passwd entry has a
* GID that does not match with any group,
* or the group was deleted while the user
* was in a newgrp session.*/
SYSLOG ((LOG_WARN,
"unknown GID `%u' used by user `%s'",
gid, name));
}
closelog ();
exit (0);
}