This is a note to let you know that I've just added the patch titled
parisc: Fix kernel crash with reversed copy_from_user()
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
parisc-fix-kernel-crash-with-reversed-copy_from_user.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From ef72f3110d8b19f4c098a0bff7ed7d11945e70c6 Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@xxxxxx>
Date: Fri, 8 Apr 2016 18:18:48 +0200
Subject: parisc: Fix kernel crash with reversed copy_from_user()
From: Helge Deller <deller@xxxxxx>
commit ef72f3110d8b19f4c098a0bff7ed7d11945e70c6 upstream.
The kernel module testcase (lib/test_user_copy.c) exhibited a kernel
crash on parisc if the parameters for copy_from_user were reversed
("illegal reversed copy_to_user" testcase).
Fix this potential crash by checking the fault handler if the faulting
address is in the exception table.
Signed-off-by: Helge Deller <deller@xxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/parisc/kernel/traps.c | 3 +++
1 file changed, 3 insertions(+)
--- a/arch/parisc/kernel/traps.c
+++ b/arch/parisc/kernel/traps.c
@@ -802,6 +802,9 @@ void notrace handle_interruption(int cod
if (fault_space == 0 && !in_atomic())
{
+ /* Clean up and return if in exception table. */
+ if (fixup_exception(regs))
+ return;
pdc_chassis_send_status(PDC_CHASSIS_DIRECT_PANIC);
parisc_terminate("Kernel Fault", regs, code, fault_address);
}
Patches currently in stable-queue which might be from deller@xxxxxx are
queue-3.14/parisc-fix-kernel-crash-with-reversed-copy_from_user.patch
queue-3.14/parisc-avoid-function-pointers-for-kernel-exception-routines.patch
--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html