diff options
Diffstat (limited to 'fs/exec.c')
| -rw-r--r-- | fs/exec.c | 34 |
1 files changed, 18 insertions, 16 deletions
diff --git a/fs/exec.c b/fs/exec.c index 54a0a557b67..475543002f1 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -953,7 +953,6 @@ int flush_old_exec(struct linux_binprm * bprm) { char * name; int i, ch, retval; - struct files_struct *files; char tcomm[sizeof(current->comm)]; /* @@ -965,26 +964,15 @@ int flush_old_exec(struct linux_binprm * bprm) goto out; /* - * Make sure we have private file handles. Ask the - * fork helper to do the work for us and the exit - * helper to do the cleanup of the old one. - */ - files = current->files; /* refcounted so safe to hold */ - retval = unshare_files(); - if (retval) - goto out; - /* * Release all of the old mmap stuff */ retval = exec_mmap(bprm->mm); if (retval) - goto mmap_failed; + goto out; bprm->mm = NULL; /* We're using it now */ /* This is the point of no return */ - put_files_struct(files); - current->sas_ss_sp = current->sas_ss_size = 0; if (current->euid == current->uid && current->egid == current->gid) @@ -1034,8 +1022,6 @@ int flush_old_exec(struct linux_binprm * bprm) return 0; -mmap_failed: - reset_files_struct(current, files); out: return retval; } @@ -1283,12 +1269,23 @@ int do_execve(char * filename, struct linux_binprm *bprm; struct file *file; unsigned long env_p; + struct files_struct *files; int retval; + files = current->files; + retval = unshare_files(); + if (retval) + goto out_ret; + + if (files == current->files) { + put_files_struct(files); + files = NULL; + } + retval = -ENOMEM; bprm = kzalloc(sizeof(*bprm), GFP_KERNEL); if (!bprm) - goto out_ret; + goto out_files; file = open_exec(filename); retval = PTR_ERR(file); @@ -1343,6 +1340,8 @@ int do_execve(char * filename, security_bprm_free(bprm); acct_update_integrals(current); kfree(bprm); + if (files) + put_files_struct(files); return retval; } @@ -1363,6 +1362,9 @@ out_file: out_kfree: kfree(bprm); +out_files: + if (files) + reset_files_struct(current, files); out_ret: return retval; } |