diff options
| author | Matthew Wilcox <matthew@wil.cx> | 2006-09-24 21:35:50 +0200 |
|---|---|---|
| committer | Matthew Wilcox <willy@parisc-linux.org> | 2006-10-04 14:51:26 +0200 |
| commit | dc02747da7897cb89b62bb08aeb06fa0bb1e7319 (patch) | |
| tree | 8c1c43d4d98b24f92d68592462be8140b7795ba8 /fs/binfmt_som.c | |
| parent | [PARISC] Export clear_user_page to modules (diff) | |
| download | linux-dc02747da7897cb89b62bb08aeb06fa0bb1e7319.tar.xz linux-dc02747da7897cb89b62bb08aeb06fa0bb1e7319.zip | |
[PARISC] Fix fs/binfmt_som.c
Fix compilation (missing include of a.out.h)
Fix security hole (need to call unshare_files)
Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
Diffstat (limited to 'fs/binfmt_som.c')
| -rw-r--r-- | fs/binfmt_som.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/fs/binfmt_som.c b/fs/binfmt_som.c index 32b5d625ce9c..5bcdaaf4eae0 100644 --- a/fs/binfmt_som.c +++ b/fs/binfmt_som.c @@ -29,6 +29,7 @@ #include <linux/personality.h> #include <linux/init.h> +#include <asm/a.out.h> #include <asm/uaccess.h> #include <asm/pgtable.h> @@ -194,6 +195,7 @@ load_som_binary(struct linux_binprm * bprm, struct pt_regs * regs) unsigned long som_entry; struct som_hdr *som_ex; struct som_exec_auxhdr *hpuxhdr; + struct files_struct *files; /* Get the exec-header */ som_ex = (struct som_hdr *) bprm->buf; @@ -208,15 +210,27 @@ load_som_binary(struct linux_binprm * bprm, struct pt_regs * regs) size = som_ex->aux_header_size; if (size > SOM_PAGESIZE) goto out; - hpuxhdr = (struct som_exec_auxhdr *) kmalloc(size, GFP_KERNEL); + hpuxhdr = kmalloc(size, GFP_KERNEL); if (!hpuxhdr) goto out; retval = kernel_read(bprm->file, som_ex->aux_header_location, (char *) hpuxhdr, size); + if (retval != size) { + if (retval >= 0) + retval = -EIO; + goto out_free; + } + + files = current->files; /* Refcounted so ok */ + retval = unshare_files(); if (retval < 0) goto out_free; -#error "Fix security hole before enabling me" + if (files == current->files) { + put_files_struct(files); + files = NULL; + } + retval = get_unused_fd(); if (retval < 0) goto out_free; |