Lines Matching +full:protect +full:- +full:exec
1 // SPDX-License-Identifier: GPL-2.0-only
3 * linux/fs/exec.c
9 * #!-checking implemented by tytso.
12 * Demand-loading implemented 01.12.91 - no need to read anything but
14 * "current->executable", and page faults do the actual loading. Clean.
17 * was less than 2 hours work to get demand-loading completely implemented.
20 * current->executable is only used by the procfs. This allows a dispatch
91 insert ? list_add(&fmt->lh, &formats) : in __register_binfmt()
92 list_add_tail(&fmt->lh, &formats); in __register_binfmt()
101 list_del(&fmt->lh); in unregister_binfmt()
109 module_put(fmt->module); in put_binfmt()
114 return (path->mnt->mnt_flags & MNT_NOEXEC) || in path_noexec()
115 (path->mnt->mnt_sb->s_iflags & SB_I_NOEXEC); in path_noexec()
150 error = -EACCES; in SYSCALL_DEFINE1()
151 if (WARN_ON_ONCE(!S_ISREG(file_inode(file)->i_mode)) || in SYSCALL_DEFINE1()
152 path_noexec(&file->f_path)) in SYSCALL_DEFINE1()
155 error = -ENOEXEC; in SYSCALL_DEFINE1()
159 if (!fmt->load_shlib) in SYSCALL_DEFINE1()
161 if (!try_module_get(fmt->module)) in SYSCALL_DEFINE1()
164 error = fmt->load_shlib(file); in SYSCALL_DEFINE1()
167 if (error != -ENOEXEC) in SYSCALL_DEFINE1()
180 * The nascent bprm->mm is not visible until exec_mmap() but it can
181 * use a lot of memory, account these pages in current->mm temporary
182 * for oom_badness()->get_mm_rss(). Once exec succeeds or fails, we
187 struct mm_struct *mm = current->mm; in acct_arg_size()
188 long diff = (long)(pages - bprm->vma_pages); in acct_arg_size()
193 bprm->vma_pages = pages; in acct_arg_size()
201 struct vm_area_struct *vma = bprm->vma; in get_arg_page()
202 struct mm_struct *mm = bprm->mm; in get_arg_page()
214 * We are doing an exec(). 'current' is the process in get_arg_page()
215 * doing the exec and 'mm' is the new process's mm. in get_arg_page()
242 flush_cache_page(bprm->vma, pos, page_to_pfn(page)); in flush_arg_page()
249 struct mm_struct *mm = bprm->mm; in __bprm_mm_init()
251 bprm->vma = vma = vm_area_alloc(mm); in __bprm_mm_init()
253 return -ENOMEM; in __bprm_mm_init()
257 err = -EINTR; in __bprm_mm_init()
276 vma->vm_end = STACK_TOP_MAX; in __bprm_mm_init()
277 vma->vm_start = vma->vm_end - PAGE_SIZE; in __bprm_mm_init()
279 vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); in __bprm_mm_init()
285 mm->stack_vm = mm->total_vm = 1; in __bprm_mm_init()
287 bprm->p = vma->vm_end - sizeof(void *); in __bprm_mm_init()
294 bprm->vma = NULL; in __bprm_mm_init()
315 page = bprm->page[pos / PAGE_SIZE]; in get_arg_page()
320 bprm->page[pos / PAGE_SIZE] = page; in get_arg_page()
332 if (bprm->page[i]) { in free_arg_page()
333 __free_page(bprm->page[i]); in free_arg_page()
334 bprm->page[i] = NULL; in free_arg_page()
353 bprm->p = PAGE_SIZE * MAX_ARG_PAGES - sizeof(void *); in __bprm_mm_init()
359 return len <= bprm->p; in valid_arg_len()
375 bprm->mm = mm = mm_alloc(); in bprm_mm_init()
376 err = -ENOMEM; in bprm_mm_init()
380 /* Save current stack limit for all calculations made during exec. */ in bprm_mm_init()
381 task_lock(current->group_leader); in bprm_mm_init()
382 bprm->rlim_stack = current->signal->rlim[RLIMIT_STACK]; in bprm_mm_init()
383 task_unlock(current->group_leader); in bprm_mm_init()
393 bprm->mm = NULL; in bprm_mm_init()
421 return ERR_PTR(-EFAULT); in get_user_arg_ptr()
428 return ERR_PTR(-EFAULT); in get_user_arg_ptr()
448 return -EFAULT; in count()
451 return -E2BIG; in count()
455 return -ERESTARTNOHAND; in count()
471 return -E2BIG; in count_strings_kernel()
473 return -ERESTARTNOHAND; in count_strings_kernel()
483 /* Avoid a pathological bprm->p. */ in bprm_set_stack_limit()
484 if (bprm->p < limit) in bprm_set_stack_limit()
485 return -E2BIG; in bprm_set_stack_limit()
486 bprm->argmin = bprm->p - limit; in bprm_set_stack_limit()
493 return bprm->p < bprm->argmin; in bprm_hit_stack_limit()
500 * Calculate bprm->argmin from:
501 * - _STK_LIM
502 * - ARG_MAX
503 * - bprm->rlim_stack.rlim_cur
504 * - bprm->argc
505 * - bprm->envc
506 * - bprm->p
516 * - the remaining binfmt code will not run out of stack space, in bprm_stack_limits()
517 * - the program will have a reasonable amount of stack left in bprm_stack_limits()
521 limit = min(limit, bprm->rlim_stack.rlim_cur / 4); in bprm_stack_limits()
528 if (bprm->argc < 0 || bprm->envc < 0) in bprm_stack_limits()
529 return -E2BIG; in bprm_stack_limits()
543 if (check_add_overflow(max(bprm->argc, 1), bprm->envc, &ptr_size) || in bprm_stack_limits()
545 return -E2BIG; in bprm_stack_limits()
547 return -E2BIG; in bprm_stack_limits()
548 limit -= ptr_size; in bprm_stack_limits()
566 while (argc-- > 0) { in copy_strings()
571 ret = -EFAULT; in copy_strings()
580 ret = -E2BIG; in copy_strings()
585 pos = bprm->p; in copy_strings()
587 bprm->p -= len; in copy_strings()
595 ret = -ERESTARTNOHAND; in copy_strings()
608 offset -= bytes_to_copy; in copy_strings()
609 pos -= bytes_to_copy; in copy_strings()
610 str -= bytes_to_copy; in copy_strings()
611 len -= bytes_to_copy; in copy_strings()
618 ret = -E2BIG; in copy_strings()
633 ret = -EFAULT; in copy_strings()
654 unsigned long pos = bprm->p; in copy_string_kernel()
657 return -EFAULT; in copy_string_kernel()
659 return -E2BIG; in copy_string_kernel()
663 bprm->p -= len; in copy_string_kernel()
665 return -E2BIG; in copy_string_kernel()
672 pos -= bytes_to_copy; in copy_string_kernel()
673 arg -= bytes_to_copy; in copy_string_kernel()
674 len -= bytes_to_copy; in copy_string_kernel()
678 return -E2BIG; in copy_string_kernel()
691 while (argc-- > 0) { in copy_strings_kernel()
696 return -ERESTARTNOHAND; in copy_strings_kernel()
714 struct mm_struct *mm = current->mm; in setup_arg_pages()
715 struct vm_area_struct *vma = bprm->vma; in setup_arg_pages()
727 stack_base = bprm->rlim_stack.rlim_max; in setup_arg_pages()
732 if (current->flags & PF_RANDOMIZE) in setup_arg_pages()
736 if (vma->vm_end - vma->vm_start > stack_base) in setup_arg_pages()
737 return -ENOMEM; in setup_arg_pages()
739 stack_base = PAGE_ALIGN(stack_top - stack_base); in setup_arg_pages()
741 stack_shift = vma->vm_start - stack_base; in setup_arg_pages()
742 mm->arg_start = bprm->p - stack_shift; in setup_arg_pages()
743 bprm->p = vma->vm_end - stack_shift; in setup_arg_pages()
749 unlikely(vma->vm_end - vma->vm_start >= stack_top - mmap_min_addr)) in setup_arg_pages()
750 return -ENOMEM; in setup_arg_pages()
752 stack_shift = vma->vm_end - stack_top; in setup_arg_pages()
754 bprm->p -= stack_shift; in setup_arg_pages()
755 mm->arg_start = bprm->p; in setup_arg_pages()
758 if (bprm->loader) in setup_arg_pages()
759 bprm->loader -= stack_shift; in setup_arg_pages()
760 bprm->exec -= stack_shift; in setup_arg_pages()
763 return -EINTR; in setup_arg_pages()
776 vm_flags |= mm->def_flags; in setup_arg_pages()
779 vma_iter_init(&vmi, mm, vma->vm_start); in setup_arg_pages()
782 ret = mprotect_fixup(&vmi, &tlb, vma, &prev, vma->vm_start, vma->vm_end, in setup_arg_pages()
792 bprm->file); in setup_arg_pages()
811 stack_size = vma->vm_end - vma->vm_start; in setup_arg_pages()
816 rlim_stack = bprm->rlim_stack.rlim_cur & PAGE_MASK; in setup_arg_pages()
821 stack_base = vma->vm_start + stack_expand; in setup_arg_pages()
823 stack_base = vma->vm_end - stack_expand; in setup_arg_pages()
825 current->mm->start_stack = bprm->p; in setup_arg_pages()
828 ret = -EFAULT; in setup_arg_pages()
848 stop = bprm->p >> PAGE_SHIFT; in transfer_args_to_stack()
851 for (index = MAX_ARG_PAGES - 1; index >= stop; index--) { in transfer_args_to_stack()
852 unsigned int offset = index == stop ? bprm->p & ~PAGE_MASK : 0; in transfer_args_to_stack()
853 char *src = kmap_local_page(bprm->page[index]) + offset; in transfer_args_to_stack()
854 sp -= PAGE_SIZE - offset; in transfer_args_to_stack()
855 if (copy_to_user((void *) sp, src, PAGE_SIZE - offset) != 0) in transfer_args_to_stack()
856 ret = -EFAULT; in transfer_args_to_stack()
862 bprm->exec += *sp_location - MAX_ARG_PAGES * PAGE_SIZE; in transfer_args_to_stack()
889 return ERR_PTR(-EINVAL); in do_open_execat()
901 * 633fb6ac3980 ("exec: move S_ISREG() check earlier"). Since then it is in do_open_execat()
902 * an invariant that all non-regular files error out before we get here. in do_open_execat()
904 if (WARN_ON_ONCE(!S_ISREG(file_inode(file)->i_mode)) || in do_open_execat()
905 path_noexec(&file->f_path)) in do_open_execat()
906 return ERR_PTR(-EACCES); in do_open_execat()
916 * open_exec - Open a path name for execution
963 old_mm = current->mm; in exec_mmap()
966 ret = down_write_killable(&tsk->signal->exec_update_lock); in exec_mmap()
974 * out and die instead of going through with the exec. in exec_mmap()
978 up_write(&tsk->signal->exec_update_lock); in exec_mmap()
987 active_mm = tsk->active_mm; in exec_mmap()
988 tsk->active_mm = mm; in exec_mmap()
989 tsk->mm = mm; in exec_mmap()
1009 setmax_mm_hiwater_rss(&tsk->signal->maxrss, old_mm); in exec_mmap()
1020 struct signal_struct *sig = tsk->signal; in de_thread()
1021 struct sighand_struct *oldsighand = tsk->sighand; in de_thread()
1022 spinlock_t *lock = &oldsighand->siglock; in de_thread()
1031 if ((sig->flags & SIGNAL_GROUP_EXIT) || sig->group_exec_task) { in de_thread()
1037 return -EAGAIN; in de_thread()
1040 sig->group_exec_task = tsk; in de_thread()
1041 sig->notify_count = zap_other_threads(tsk); in de_thread()
1043 sig->notify_count--; in de_thread()
1045 while (sig->notify_count) { in de_thread()
1061 struct task_struct *leader = tsk->group_leader; in de_thread()
1068 * exit_notify() can't miss ->group_exec_task in de_thread()
1070 sig->notify_count = -1; in de_thread()
1071 if (likely(leader->exit_state)) in de_thread()
1082 * The only record we have of the real-time age of a in de_thread()
1085 * from sister threads now dead. But in this non-leader in de_thread()
1086 * exec, nothing survives from the original leader thread, in de_thread()
1091 tsk->start_time = leader->start_time; in de_thread()
1092 tsk->start_boottime = leader->start_boottime; in de_thread()
1096 * An exec() starts a new thread group with the in de_thread()
1110 list_replace_rcu(&leader->tasks, &tsk->tasks); in de_thread()
1111 list_replace_init(&leader->sibling, &tsk->sibling); in de_thread()
1113 tsk->group_leader = tsk; in de_thread()
1114 leader->group_leader = tsk; in de_thread()
1116 tsk->exit_signal = SIGCHLD; in de_thread()
1117 leader->exit_signal = -1; in de_thread()
1119 BUG_ON(leader->exit_state != EXIT_ZOMBIE); in de_thread()
1120 leader->exit_state = EXIT_DEAD; in de_thread()
1122 * We are going to release_task()->ptrace_unlink() silently, in de_thread()
1126 if (unlikely(leader->ptrace)) in de_thread()
1127 __wake_up_parent(leader, leader->parent); in de_thread()
1134 sig->group_exec_task = NULL; in de_thread()
1135 sig->notify_count = 0; in de_thread()
1139 tsk->exit_signal = SIGCHLD; in de_thread()
1147 sig->group_exec_task = NULL; in de_thread()
1148 sig->notify_count = 0; in de_thread()
1150 return -EAGAIN; in de_thread()
1162 struct sighand_struct *oldsighand = me->sighand; in unshare_sighand()
1164 if (refcount_read(&oldsighand->count) != 1) { in unshare_sighand()
1167 * This ->sighand is shared with the CLONE_SIGHAND in unshare_sighand()
1172 return -ENOMEM; in unshare_sighand()
1174 refcount_set(&newsighand->count, 1); in unshare_sighand()
1177 spin_lock(&oldsighand->siglock); in unshare_sighand()
1178 memcpy(newsighand->action, oldsighand->action, in unshare_sighand()
1179 sizeof(newsighand->action)); in unshare_sighand()
1180 rcu_assign_pointer(me->sighand, newsighand); in unshare_sighand()
1181 spin_unlock(&oldsighand->siglock); in unshare_sighand()
1190 * This is unlocked -- the string will always be NUL-terminated, but
1193 void __set_task_comm(struct task_struct *tsk, const char *buf, bool exec) in __set_task_comm() argument
1195 size_t len = min(strlen(buf), sizeof(tsk->comm) - 1); in __set_task_comm()
1198 memcpy(tsk->comm, buf, len); in __set_task_comm()
1199 memset(&tsk->comm[len], 0, sizeof(tsk->comm) - len); in __set_task_comm()
1200 perf_event_comm(tsk, exec); in __set_task_comm()
1220 * This tracepoint marks the point before flushing the old exec where in begin_new_exec()
1223 * the current task has successfully switched to the new exec. in begin_new_exec()
1230 bprm->point_of_no_return = true; in begin_new_exec()
1237 current->fs->in_exec = 0; in begin_new_exec()
1249 * Must be called _before_ exec_mmap() as bprm->mm is in begin_new_exec()
1253 retval = set_mm_exe_file(bprm->mm, bprm->file); in begin_new_exec()
1257 /* If the binary is not readable then enforce mm->dumpable=0 */ in begin_new_exec()
1258 would_dump(bprm, bprm->file); in begin_new_exec()
1259 if (bprm->have_execfd) in begin_new_exec()
1260 would_dump(bprm, bprm->executable); in begin_new_exec()
1266 retval = exec_mmap(bprm->mm); in begin_new_exec()
1270 bprm->mm = NULL; in begin_new_exec()
1277 spin_lock_irq(&me->sighand->siglock); in begin_new_exec()
1279 spin_unlock_irq(&me->sighand->siglock); in begin_new_exec()
1291 me->flags &= ~(PF_RANDOMIZE | PF_FORKNOEXEC | in begin_new_exec()
1294 me->personality &= ~bprm->per_clear; in begin_new_exec()
1301 * trying to access the should-be-closed file descriptors of a process in begin_new_exec()
1302 * undergoing exec(2). in begin_new_exec()
1304 do_close_on_exec(me->files); in begin_new_exec()
1306 if (bprm->secureexec) { in begin_new_exec()
1308 me->pdeath_signal = 0; in begin_new_exec()
1317 if (bprm->rlim_stack.rlim_cur > _STK_LIM) in begin_new_exec()
1318 bprm->rlim_stack.rlim_cur = _STK_LIM; in begin_new_exec()
1321 me->sas_ss_sp = me->sas_ss_size = 0; in begin_new_exec()
1326 * bprm->secureexec instead. in begin_new_exec()
1328 if (bprm->interp_flags & BINPRM_FLAGS_ENFORCE_NONDUMP || in begin_new_exec()
1331 set_dumpable(current->mm, suid_dumpable); in begin_new_exec()
1333 set_dumpable(current->mm, SUID_DUMP_USER); in begin_new_exec()
1342 if (bprm->comm_from_dentry) { in begin_new_exec()
1352 __set_task_comm(me, smp_load_acquire(&bprm->file->f_path.dentry->d_name.name), in begin_new_exec()
1356 __set_task_comm(me, kbasename(bprm->filename), true); in begin_new_exec()
1359 /* An exec changes our domain. We are no longer part of the thread in begin_new_exec()
1361 WRITE_ONCE(me->self_exec_id, me->self_exec_id + 1); in begin_new_exec()
1364 retval = set_cred_ucounts(bprm->cred); in begin_new_exec()
1373 commit_creds(bprm->cred); in begin_new_exec()
1374 bprm->cred = NULL; in begin_new_exec()
1382 if (get_dumpable(me->mm) != SUID_DUMP_USER) in begin_new_exec()
1392 if (bprm->have_execfd) { in begin_new_exec()
1396 fd_install(retval, bprm->executable); in begin_new_exec()
1397 bprm->executable = NULL; in begin_new_exec()
1398 bprm->execfd = retval; in begin_new_exec()
1403 up_write(&me->signal->exec_update_lock); in begin_new_exec()
1404 if (!bprm->cred) in begin_new_exec()
1405 mutex_unlock(&me->signal->cred_guard_mutex); in begin_new_exec()
1418 bprm->interp_flags |= BINPRM_FLAGS_ENFORCE_NONDUMP; in would_dump()
1420 /* Ensure mm->user_ns contains the executable */ in would_dump()
1421 user_ns = old = bprm->mm->user_ns; in would_dump()
1424 user_ns = user_ns->parent; in would_dump()
1427 bprm->mm->user_ns = get_user_ns(user_ns); in would_dump()
1439 arch_pick_mmap_layout(me->mm, &bprm->rlim_stack); in setup_new_exec()
1447 me->mm->task_size = TASK_SIZE; in setup_new_exec()
1448 up_write(&me->signal->exec_update_lock); in setup_new_exec()
1449 mutex_unlock(&me->signal->cred_guard_mutex); in setup_new_exec()
1457 task_lock(current->group_leader); in finalize_exec()
1458 current->signal->rlim[RLIMIT_STACK] = bprm->rlim_stack; in finalize_exec()
1459 task_unlock(current->group_leader); in finalize_exec()
1464 * Prepare credentials and lock ->cred_guard_mutex.
1466 * Or, if exec fails before, free_bprm() should release ->cred
1471 if (mutex_lock_interruptible(¤t->signal->cred_guard_mutex)) in prepare_bprm_creds()
1472 return -ERESTARTNOINTR; in prepare_bprm_creds()
1474 bprm->cred = prepare_exec_creds(); in prepare_bprm_creds()
1475 if (likely(bprm->cred)) in prepare_bprm_creds()
1478 mutex_unlock(¤t->signal->cred_guard_mutex); in prepare_bprm_creds()
1479 return -ENOMEM; in prepare_bprm_creds()
1493 if (bprm->mm) { in free_bprm()
1495 mmput(bprm->mm); in free_bprm()
1498 if (bprm->cred) { in free_bprm()
1499 /* in case exec fails before de_thread() succeeds */ in free_bprm()
1500 current->fs->in_exec = 0; in free_bprm()
1501 mutex_unlock(¤t->signal->cred_guard_mutex); in free_bprm()
1502 abort_creds(bprm->cred); in free_bprm()
1504 do_close_execat(bprm->file); in free_bprm()
1505 if (bprm->executable) in free_bprm()
1506 fput(bprm->executable); in free_bprm()
1508 if (bprm->interp != bprm->filename) in free_bprm()
1509 kfree(bprm->interp); in free_bprm()
1510 kfree(bprm->fdpath); in free_bprm()
1518 int retval = -ENOMEM; in alloc_bprm()
1527 return ERR_PTR(-ENOMEM); in alloc_bprm()
1530 bprm->file = file; in alloc_bprm()
1532 if (fd == AT_FDCWD || filename->name[0] == '/') { in alloc_bprm()
1533 bprm->filename = filename->name; in alloc_bprm()
1535 if (filename->name[0] == '\0') { in alloc_bprm()
1536 bprm->fdpath = kasprintf(GFP_KERNEL, "/dev/fd/%d", fd); in alloc_bprm()
1537 bprm->comm_from_dentry = 1; in alloc_bprm()
1539 bprm->fdpath = kasprintf(GFP_KERNEL, "/dev/fd/%d/%s", in alloc_bprm()
1540 fd, filename->name); in alloc_bprm()
1542 if (!bprm->fdpath) in alloc_bprm()
1547 * inaccessible after exec. This allows the code in exec to in alloc_bprm()
1555 bprm->interp_flags |= BINPRM_FLAGS_PATH_INACCESSIBLE; in alloc_bprm()
1557 bprm->filename = bprm->fdpath; in alloc_bprm()
1559 bprm->interp = bprm->filename; in alloc_bprm()
1569 * - security_bprm_check() in alloc_bprm()
1570 * - security_bprm_creds_from_file() in alloc_bprm()
1571 * - security_bprm_committing_creds() in alloc_bprm()
1572 * - security_bprm_committed_creds() in alloc_bprm()
1574 bprm->is_check = !!(flags & AT_EXECVE_CHECK); in alloc_bprm()
1588 if (bprm->interp != bprm->filename) in bprm_change_interp()
1589 kfree(bprm->interp); in bprm_change_interp()
1590 bprm->interp = kstrdup(interp, GFP_KERNEL); in bprm_change_interp()
1591 if (!bprm->interp) in bprm_change_interp()
1592 return -ENOMEM; in bprm_change_interp()
1599 * - the caller must hold ->cred_guard_mutex to protect against
1600 * PTRACE_ATTACH or seccomp thread-sync
1607 if (p->ptrace) in check_unsafe_exec()
1608 bprm->unsafe |= LSM_UNSAFE_PTRACE; in check_unsafe_exec()
1615 bprm->unsafe |= LSM_UNSAFE_NO_NEW_PRIVS; in check_unsafe_exec()
1619 * suid exec because the differently privileged task in check_unsafe_exec()
1623 * Otherwise we set fs->in_exec = 1 to deny clone(CLONE_FS) in check_unsafe_exec()
1624 * from another sub-thread until de_thread() succeeds, this in check_unsafe_exec()
1628 spin_lock(&p->fs->lock); in check_unsafe_exec()
1631 if (t->fs == p->fs) in check_unsafe_exec()
1637 if (p->fs->users > n_fs) in check_unsafe_exec()
1638 bprm->unsafe |= LSM_UNSAFE_SHARE; in check_unsafe_exec()
1640 p->fs->in_exec = 1; in check_unsafe_exec()
1641 spin_unlock(&p->fs->lock); in check_unsafe_exec()
1654 if (!mnt_may_suid(file->f_path.mnt)) in bprm_fill_uid()
1660 mode = READ_ONCE(inode->i_mode); in bprm_fill_uid()
1670 mode = inode->i_mode; in bprm_fill_uid()
1676 /* Did the exec bit vanish out from under us? Give up. */ in bprm_fill_uid()
1681 if (!vfsuid_has_mapping(bprm->cred->user_ns, vfsuid) || in bprm_fill_uid()
1682 !vfsgid_has_mapping(bprm->cred->user_ns, vfsgid)) in bprm_fill_uid()
1686 bprm->per_clear |= PER_CLEAR_ON_SETID; in bprm_fill_uid()
1687 bprm->cred->euid = vfsuid_into_kuid(vfsuid); in bprm_fill_uid()
1691 bprm->per_clear |= PER_CLEAR_ON_SETID; in bprm_fill_uid()
1692 bprm->cred->egid = vfsgid_into_kgid(vfsgid); in bprm_fill_uid()
1697 * Compute brpm->cred based upon the final binary.
1702 struct file *file = bprm->execfd_creds ? bprm->executable : bprm->file; in bprm_creds_from_file()
1718 memset(bprm->buf, 0, BINPRM_BUF_SIZE); in prepare_binprm()
1719 return kernel_read(bprm->file, bprm->buf, BINPRM_BUF_SIZE, &pos); in prepare_binprm()
1723 * Arguments are '\0' separated strings found at the location bprm->p
1724 * points to; chop off the first by relocating brpm->p to right after
1733 if (!bprm->argc) in remove_arg_zero()
1737 offset = bprm->p & ~PAGE_MASK; in remove_arg_zero()
1738 page = get_arg_page(bprm, bprm->p, 0); in remove_arg_zero()
1740 return -EFAULT; in remove_arg_zero()
1744 offset++, bprm->p++) in remove_arg_zero()
1751 bprm->p++; in remove_arg_zero()
1752 bprm->argc--; in remove_arg_zero()
1776 if (!try_module_get(fmt->module)) in search_binary_handler()
1780 retval = fmt->load_binary(bprm); in search_binary_handler()
1784 if (bprm->point_of_no_return || (retval != -ENOEXEC)) { in search_binary_handler()
1791 return -ENOEXEC; in search_binary_handler()
1801 old_pid = current->pid; in exec_binprm()
1803 old_vpid = task_pid_nr_ns(current, task_active_pid_ns(current->parent)); in exec_binprm()
1808 struct file *exec; in exec_binprm() local
1810 return -ELOOP; in exec_binprm()
1815 if (!bprm->interpreter) in exec_binprm()
1818 exec = bprm->file; in exec_binprm()
1819 bprm->file = bprm->interpreter; in exec_binprm()
1820 bprm->interpreter = NULL; in exec_binprm()
1822 exe_file_allow_write_access(exec); in exec_binprm()
1823 if (unlikely(bprm->have_execfd)) { in exec_binprm()
1824 if (bprm->executable) { in exec_binprm()
1825 fput(exec); in exec_binprm()
1826 return -ENOEXEC; in exec_binprm()
1828 bprm->executable = exec; in exec_binprm()
1830 fput(exec); in exec_binprm()
1851 * where setuid-ness is evaluated. in bprm_execve()
1854 current->in_execve = 1; in bprm_execve()
1859 /* Set the unchanging part of bprm->cred */ in bprm_execve()
1861 if (retval || bprm->is_check) in bprm_execve()
1870 current->in_execve = 0; in bprm_execve()
1884 if (bprm->point_of_no_return && !fatal_signal_pending(current)) in bprm_execve()
1888 current->in_execve = 0; in bprm_execve()
1910 if ((current->flags & PF_NPROC_EXCEEDED) && in do_execveat_common()
1912 retval = -EAGAIN; in do_execveat_common()
1918 current->flags &= ~PF_NPROC_EXCEEDED; in do_execveat_common()
1929 bprm->argc = retval; in do_execveat_common()
1934 bprm->envc = retval; in do_execveat_common()
1940 retval = copy_string_kernel(bprm->filename, bprm); in do_execveat_common()
1943 bprm->exec = bprm->p; in do_execveat_common()
1945 retval = copy_strings(bprm->envc, envp, bprm); in do_execveat_common()
1949 retval = copy_strings(bprm->argc, argv, bprm); in do_execveat_common()
1959 if (bprm->argc == 0) { in do_execveat_common()
1963 bprm->argc = 1; in do_execveat_common()
1966 current->comm, bprm->filename); in do_execveat_common()
1986 /* It is non-sense for kernel threads to call execve */ in kernel_execve()
1987 if (WARN_ON_ONCE(current->flags & PF_KTHREAD)) in kernel_execve()
1988 return -EINVAL; in kernel_execve()
2002 retval = -EINVAL; in kernel_execve()
2005 bprm->argc = retval; in kernel_execve()
2010 bprm->envc = retval; in kernel_execve()
2016 retval = copy_string_kernel(bprm->filename, bprm); in kernel_execve()
2019 bprm->exec = bprm->p; in kernel_execve()
2021 retval = copy_strings_kernel(bprm->envc, envp, bprm); in kernel_execve()
2025 retval = copy_strings_kernel(bprm->argc, argv, bprm); in kernel_execve()
2092 struct mm_struct *mm = current->mm; in set_binfmt()
2094 if (mm->binfmt) in set_binfmt()
2095 module_put(mm->binfmt->module); in set_binfmt()
2097 mm->binfmt = new; in set_binfmt()
2099 __module_get(new->module); in set_binfmt()
2104 * set_dumpable stores three-value SUID_DUMP_* into mm->flags.
2111 set_mask_bits(&mm->flags, MMF_DUMPABLE_MASK, value); in set_dumpable()