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authorSuresh Siddha <suresh.b.siddha@intel.com>2006-02-26 04:18:28 +0100
committerLinus Torvalds <torvalds@g5.osdl.org>2006-02-26 09:53:30 -0800
commit5342fba5412cead88b61ead07168615dbeba1ee3 (patch)
tree1ec0936cff22284b2226f431033b1a36b27615c7 /fs/binfmt_elf.c
parentf83f2b5fbab4585f4de4523c7879d60e3f85a248 (diff)
downloadconfigs-5342fba5412cead88b61ead07168615dbeba1ee3.tar.gz
[PATCH] x86_64: Check for bad elf entry address.
Fixes a local DOS on Intel systems that lead to an endless recursive fault. AMD machines don't seem to be affected. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/binfmt_elf.c')
-rw-r--r--fs/binfmt_elf.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 1b117a44129..c2eac2a50bd 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -938,6 +938,11 @@ static int load_elf_binary(struct linux_binprm * bprm, struct pt_regs * regs)
kfree(elf_interpreter);
} else {
elf_entry = loc->elf_ex.e_entry;
+ if (BAD_ADDR(elf_entry)) {
+ send_sig(SIGSEGV, current, 0);
+ retval = -ENOEXEC; /* Nobody gets to see this, but.. */
+ goto out_free_dentry;
+ }
}
kfree(elf_phdata);