Messages in this thread Patch in this message | | | Date | Mon, 27 Feb 2006 14:32:33 -0800 | From | Chris Wright <> | Subject | [patch 33/39] [PATCH] x86_64: Check for bad elf entry address |
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-stable review patch. If anyone has any objections, please let us know. ------------------
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: Chris Wright <chrisw@sous-sol.org> --- fs/binfmt_elf.c | 5 +++++ 1 files changed, 5 insertions(+)
--- linux-2.6.15.4.orig/fs/binfmt_elf.c +++ linux-2.6.15.4/fs/binfmt_elf.c @@ -932,6 +932,11 @@ static int load_elf_binary(struct linux_ 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); -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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