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Lines 1431-1436
static void check_unsafe_exec(struct linux_binprm *bprm)
Link Here
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| 1431 |
{ |
1431 |
{ |
| 1432 |
struct task_struct *p = current, *t; |
1432 |
struct task_struct *p = current, *t; |
| 1433 |
unsigned n_fs; |
1433 |
unsigned n_fs; |
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|
1434 |
bool fs_recheck; |
| 1434 |
|
1435 |
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| 1435 |
if (p->ptrace) |
1436 |
if (p->ptrace) |
| 1436 |
bprm->unsafe |= LSM_UNSAFE_PTRACE; |
1437 |
bprm->unsafe |= LSM_UNSAFE_PTRACE; |
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Lines 1442-1447
static void check_unsafe_exec(struct linux_binprm *bprm)
Link Here
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| 1442 |
if (task_no_new_privs(current)) |
1443 |
if (task_no_new_privs(current)) |
| 1443 |
bprm->unsafe |= LSM_UNSAFE_NO_NEW_PRIVS; |
1444 |
bprm->unsafe |= LSM_UNSAFE_NO_NEW_PRIVS; |
| 1444 |
|
1445 |
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|
1446 |
recheck: |
| 1447 |
fs_recheck = false; |
| 1445 |
t = p; |
1448 |
t = p; |
| 1446 |
n_fs = 1; |
1449 |
n_fs = 1; |
| 1447 |
spin_lock(&p->fs->lock); |
1450 |
spin_lock(&p->fs->lock); |
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Lines 1449-1460
static void check_unsafe_exec(struct linux_binprm *bprm)
Link Here
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| 1449 |
while_each_thread(p, t) { |
1452 |
while_each_thread(p, t) { |
| 1450 |
if (t->fs == p->fs) |
1453 |
if (t->fs == p->fs) |
| 1451 |
n_fs++; |
1454 |
n_fs++; |
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|
1455 |
if (t->flags & (PF_EXITING | PF_FORKNOEXEC)) |
| 1456 |
fs_recheck = true; |
| 1452 |
} |
1457 |
} |
| 1453 |
rcu_read_unlock(); |
1458 |
rcu_read_unlock(); |
| 1454 |
|
1459 |
|
| 1455 |
if (p->fs->users > n_fs) |
1460 |
if (p->fs->users > n_fs) { |
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|
1461 |
if (fs_recheck) { |
| 1462 |
spin_unlock(&p->fs->lock); |
| 1463 |
goto recheck; |
| 1464 |
} |
| 1456 |
bprm->unsafe |= LSM_UNSAFE_SHARE; |
1465 |
bprm->unsafe |= LSM_UNSAFE_SHARE; |
| 1457 |
else |
1466 |
} else |
| 1458 |
p->fs->in_exec = 1; |
1467 |
p->fs->in_exec = 1; |
| 1459 |
spin_unlock(&p->fs->lock); |
1468 |
spin_unlock(&p->fs->lock); |
| 1460 |
} |
1469 |
} |
| 1461 |
- |
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