From: Greg Kroah-Hartman <gregkh@suse.de>
Date: Wed, 11 May 2005 07:10:44 +0000 (-0700)
Subject: [PATCH] fix Linux kernel ELF core dump privilege elevation
X-Git-Tag: v2.6.12-rc5~173
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a84a505956f5c795a9ab3d60d97b6b91a27aa571;p=linux-2.6

[PATCH] fix Linux kernel ELF core dump privilege elevation

As reported by Paul Starzetz <ihaquer@isec.pl>

Reference: CAN-2005-1263

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index ce9423bb2d..c374be51b0 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -251,7 +251,7 @@ create_elf_tables(struct linux_binprm *bprm, struct elfhdr * exec,
 	}
 
 	/* Populate argv and envp */
-	p = current->mm->arg_start;
+	p = current->mm->arg_end = current->mm->arg_start;
 	while (argc-- > 0) {
 		size_t len;
 		__put_user((elf_addr_t)p, argv++);
@@ -1301,7 +1301,7 @@ static void fill_prstatus(struct elf_prstatus *prstatus,
 static int fill_psinfo(struct elf_prpsinfo *psinfo, struct task_struct *p,
 		       struct mm_struct *mm)
 {
-	int i, len;
+	unsigned int i, len;
 	
 	/* first copy the parameters from user space */
 	memset(psinfo, 0, sizeof(struct elf_prpsinfo));