diff options
Diffstat (limited to 'fs/exec.c')
| -rw-r--r-- | fs/exec.c | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/fs/exec.c b/fs/exec.c index 225afb0d94e5..1ea7c8d6c898 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -45,7 +45,7 @@ #include <linux/mount.h> #include <linux/security.h> #include <linux/syscalls.h> -#include <linux/rmap-locking.h> +#include <linux/rmap.h> #include <asm/uaccess.h> #include <asm/pgalloc.h> @@ -342,7 +342,7 @@ out_sig: return; } -int setup_arg_pages(struct linux_binprm *bprm) +int setup_arg_pages(struct linux_binprm *bprm, int executable_stack) { unsigned long stack_base; struct vm_area_struct *mpnt; @@ -425,8 +425,16 @@ int setup_arg_pages(struct linux_binprm *bprm) mpnt->vm_start = PAGE_MASK & (unsigned long) bprm->p; mpnt->vm_end = STACK_TOP; #endif - mpnt->vm_page_prot = protection_map[VM_STACK_FLAGS & 0x7]; - mpnt->vm_flags = VM_STACK_FLAGS; + /* Adjust stack execute permissions; explicitly enable + * for EXSTACK_ENABLE_X, disable for EXSTACK_DISABLE_X + * and leave alone (arch default) otherwise. */ + if (unlikely(executable_stack == EXSTACK_ENABLE_X)) + mpnt->vm_flags = VM_STACK_FLAGS | VM_EXEC; + else if (executable_stack == EXSTACK_DISABLE_X) + mpnt->vm_flags = VM_STACK_FLAGS & ~VM_EXEC; + else + mpnt->vm_flags = VM_STACK_FLAGS; + mpnt->vm_page_prot = protection_map[mpnt->vm_flags & 0x7]; mpnt->vm_ops = NULL; mpnt->vm_pgoff = 0; mpnt->vm_file = NULL; @@ -601,6 +609,11 @@ static inline int de_thread(struct task_struct *tsk) newsig->group_stop_count = 0; newsig->curr_target = NULL; init_sigpending(&newsig->shared_pending); + + newsig->pgrp = oldsig->pgrp; + newsig->session = oldsig->session; + newsig->leader = oldsig->leader; + newsig->tty_old_pgrp = oldsig->tty_old_pgrp; } if (thread_group_empty(current)) @@ -843,7 +856,6 @@ int flush_old_exec(struct linux_binprm * bprm) flush_signal_handlers(current, 0); flush_old_files(current->files); - exit_itimers(current); return 0; |