From dc02747da7897cb89b62bb08aeb06fa0bb1e7319 Mon Sep 17 00:00:00 2001 From: Matthew Wilcox Date: Sun, 24 Sep 2006 13:35:50 -0600 Subject: [PATCH] [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 Signed-off-by: Kyle McMartin --- fs/binfmt_som.c | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-) diff --git a/fs/binfmt_som.c b/fs/binfmt_som.c index 32b5d625ce..5bcdaaf4ea 100644 --- a/fs/binfmt_som.c +++ b/fs/binfmt_som.c @@ -29,6 +29,7 @@ #include #include +#include #include #include @@ -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; -- 2.39.5