diff options
| author | Ingo Molnar <mingo@elte.hu> | 2009-03-04 11:14:47 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-03-04 11:14:47 +0100 |
| commit | a1be621dfacbef0fd374d8acd553d71e07bf29ac (patch) | |
| tree | 32b0355454b43b1098b5e01dd699fd7281abf781 /kernel/sys.c | |
| parent | 3612fdf780e28b10323dd12d2b0f306c7ada4d4c (diff) | |
| parent | fec6c6fec3e20637bee5d276fb61dd8b49a3f9cc (diff) | |
Merge branch 'tracing/ftrace'; commit 'v2.6.29-rc7' into tracing/core
Diffstat (limited to 'kernel/sys.c')
| -rw-r--r-- | kernel/sys.c | 31 |
1 files changed, 20 insertions, 11 deletions
diff --git a/kernel/sys.c b/kernel/sys.c index f145c415bc1..37f458e6882 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -559,7 +559,7 @@ error: abort_creds(new); return retval; } - + /* * change the user struct in a credentials set to match the new UID */ @@ -571,6 +571,11 @@ static int set_user(struct cred *new) if (!new_user) return -EAGAIN; + if (!task_can_switch_user(new_user, current)) { + free_uid(new_user); + return -EINVAL; + } + if (atomic_read(&new_user->processes) >= current->signal->rlim[RLIMIT_NPROC].rlim_cur && new_user != INIT_USER) { @@ -631,10 +636,11 @@ SYSCALL_DEFINE2(setreuid, uid_t, ruid, uid_t, euid) goto error; } - retval = -EAGAIN; - if (new->uid != old->uid && set_user(new) < 0) - goto error; - + if (new->uid != old->uid) { + retval = set_user(new); + if (retval < 0) + goto error; + } if (ruid != (uid_t) -1 || (euid != (uid_t) -1 && euid != old->uid)) new->suid = new->euid; @@ -680,9 +686,10 @@ SYSCALL_DEFINE1(setuid, uid_t, uid) retval = -EPERM; if (capable(CAP_SETUID)) { new->suid = new->uid = uid; - if (uid != old->uid && set_user(new) < 0) { - retval = -EAGAIN; - goto error; + if (uid != old->uid) { + retval = set_user(new); + if (retval < 0) + goto error; } } else if (uid != old->uid && uid != new->suid) { goto error; @@ -734,11 +741,13 @@ SYSCALL_DEFINE3(setresuid, uid_t, ruid, uid_t, euid, uid_t, suid) goto error; } - retval = -EAGAIN; if (ruid != (uid_t) -1) { new->uid = ruid; - if (ruid != old->uid && set_user(new) < 0) - goto error; + if (ruid != old->uid) { + retval = set_user(new); + if (retval < 0) + goto error; + } } if (euid != (uid_t) -1) new->euid = euid; |