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check_unsafe_exec() doesn't care about signal handlers sharing

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... since we'll unshare sighand anyway

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2009-03-30 07:35:18 -04:00
parent 498052bba5
commit f1191b50ec
1 changed files with 2 additions and 5 deletions
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7
fs/exec.c
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@ -1060,23 +1060,20 @@ int check_unsafe_exec(struct linux_binprm *bprm)
{ {
struct task_struct *p = current, *t; struct task_struct *p = current, *t;
unsigned long flags; unsigned long flags;
unsigned n_fs, n_sighand; unsigned n_fs;
int res = 0; int res = 0;
bprm->unsafe = tracehook_unsafe_exec(p); bprm->unsafe = tracehook_unsafe_exec(p);
n_fs = 1; n_fs = 1;
n_sighand = 1;
write_lock(&p->fs->lock); write_lock(&p->fs->lock);
lock_task_sighand(p, &flags); lock_task_sighand(p, &flags);
for (t = next_thread(p); t != p; t = next_thread(t)) { for (t = next_thread(p); t != p; t = next_thread(t)) {
if (t->fs == p->fs) if (t->fs == p->fs)
n_fs++; n_fs++;
n_sighand++;
} }
if (p->fs->users > n_fs || if (p->fs->users > n_fs) {
atomic_read(&p->sighand->count) > n_sighand) {
bprm->unsafe |= LSM_UNSAFE_SHARE; bprm->unsafe |= LSM_UNSAFE_SHARE;
} else { } else {
if (p->fs->in_exec) if (p->fs->in_exec)