diff options
| -rw-r--r-- | fs/binfmt_elf.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index b2efbae..68e20d5 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -243,8 +243,9 @@ create_elf_tables(struct linux_binprm *bprm, struct elfhdr *exec, if (interp_aout) { argv = sp + 2; envp = argv + argc + 1; - __put_user((elf_addr_t)(unsigned long)argv, sp++); - __put_user((elf_addr_t)(unsigned long)envp, sp++); + if (__put_user((elf_addr_t)(unsigned long)argv, sp++) || + __put_user((elf_addr_t)(unsigned long)envp, sp++)) + return -EFAULT; } else { argv = sp; envp = argv + argc + 1; @@ -254,7 +255,8 @@ create_elf_tables(struct linux_binprm *bprm, struct elfhdr *exec, p = current->mm->arg_end = current->mm->arg_start; while (argc-- > 0) { size_t len; - __put_user((elf_addr_t)p, argv++); + if (__put_user((elf_addr_t)p, argv++)) + return -EFAULT; len = strnlen_user((void __user *)p, PAGE_SIZE*MAX_ARG_PAGES); if (!len || len > PAGE_SIZE*MAX_ARG_PAGES) return 0; @@ -265,7 +267,8 @@ create_elf_tables(struct linux_binprm *bprm, struct elfhdr *exec, current->mm->arg_end = current->mm->env_start = p; while (envc-- > 0) { size_t len; - __put_user((elf_addr_t)p, envp++); + if (__put_user((elf_addr_t)p, envp++)) + return -EFAULT; len = strnlen_user((void __user *)p, PAGE_SIZE*MAX_ARG_PAGES); if (!len || len > PAGE_SIZE*MAX_ARG_PAGES) return 0; |
