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[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>
This commit is contained in:
Suresh Siddha 2006-02-26 04:18:28 +01:00 committed by Linus Torvalds
parent f83f2b5fba
commit 5342fba541
1 changed files with 5 additions and 0 deletions
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5
fs/binfmt_elf.c
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@ -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);