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linux-sg2042/arch/s390/kernel
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Jarod Wilson 3d6e48f433 [S390] CVE-2008-1514: prevent ptrace padding area read/write in 31-bit mode 
When running a 31-bit ptrace, on either an s390 or s390x kernel,
reads and writes into a padding area in struct user_regs_struct32
will result in a kernel panic.

This is also known as CVE-2008-1514.

Test case available here:
http://sources.redhat.com/cgi-bin/cvsweb.cgi/~checkout~/tests/ptrace-tests/tests/user-area-padding.c?cvsroot=systemtap

Steps to reproduce:
1) wget the above
2) gcc -o user-area-padding-31bit user-area-padding.c -Wall -ggdb2 -D_GNU_SOURCE -m31
3) ./user-area-padding-31bit
<panic>

Test status
-----------
Without patch, both s390 and s390x kernels panic. With patch, the test case,
as well as the gdb testsuite, pass without incident, padding area reads
returning zero, writes ignored.

Nb: original version returned -EINVAL on write attempts, which broke the
gdb test and made the test case slightly unhappy, Jan Kratochvil suggested
the change to return 0 on write attempts.

Signed-off-by: Jarod Wilson <jarod@redhat.com>
Tested-by: Jan Kratochvil <jan.kratochvil@redhat.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
 		2008-09-09 12:39:06 +02:00
..
Makefile [S390] Move memory detection code to own file. 2008-07-14 10:02:17 +02:00
asm-offsets.c s390: use kbuild.h instead of defining macros in asm-offsets.c 2008-04-29 08:06:30 -07:00
audit.c [S390] Get rid of a bunch of sparse warnings again. 2007-10-12 16:13:06 +02:00
audit.h [S390] Get rid of a bunch of sparse warnings again. 2007-10-12 16:13:06 +02:00
base.S [S390] Convert memory detection into C code. 2007-02-05 21:18:37 +01:00
bitmap.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
compat_audit.c [S390] Get rid of a bunch of sparse warnings again. 2007-10-12 16:13:06 +02:00
compat_exec_domain.c [S390] Get rid of a lot of sparse warnings. 2007-02-05 21:16:47 +01:00
compat_linux.c arch: Remove unnecessary inclusions of asm/semaphore.h 2008-04-18 22:14:49 -04:00
compat_linux.h [S390] Fix a lot of sparse warnings. 2008-04-17 07:47:06 +02:00
compat_ptrace.h [S390] CVE-2008-1514: prevent ptrace padding area read/write in 31-bit mode 2008-09-09 12:39:06 +02:00
compat_signal.c [S390] Fix a lot of sparse warnings. 2008-04-17 07:47:06 +02:00
compat_wrapper.S [S390] Wire up new syscalls. 2008-08-01 16:39:32 +02:00
cpcmd.c [S390] cpcmd: fix inline assembly usage. 2007-10-12 16:13:09 +02:00
crash.c [S390] Get rid of a lot of sparse warnings. 2007-02-05 21:16:47 +01:00
debug.c [S390] Cleanup s390 debug feature print messages. 2008-07-14 10:02:22 +02:00
diag.c [S390] vmur: fix diag14 exceptions with addresses > 2GB. 2007-08-22 13:51:47 +02:00
dis.c [S390] disassembler: fix idte instruction format. 2008-05-30 10:03:36 +02:00
early.c [S390] Remove P390 support. 2008-07-14 10:02:25 +02:00
ebcdic.c [S390] Get rid of a lot of sparse warnings. 2007-02-05 21:16:47 +01:00
entry.S [S390] s390: Optimize user and work TIF check 2008-05-07 09:23:00 +02:00
entry.h [S390] Fix a lot of sparse warnings. 2008-04-17 07:47:06 +02:00
entry64.S [S390] s390-kvm: leave sie context on work. Removes preemption requirement 2008-05-07 09:23:01 +02:00
head.S [S390] Get rid of new section mismatch warnings. 2007-07-27 12:29:18 +02:00
head31.S [S390] Convert machine feature detection code to C. 2008-04-30 13:38:47 +02:00
head64.S [S390] System z large page support. 2008-04-30 13:38:47 +02:00
init_task.c [PATCH] take init_files to fs/file.c 2008-05-16 17:22:20 -04:00
ipl.c [S390] ipl: Reboot from alternate device does not work when booting from file 2008-08-01 16:39:30 +02:00
irq.c [S390] show_interrupts: prevent cpu hotplug when walking cpu_online_map. 2008-05-15 16:52:41 +02:00
kprobes.c stop_machine: Wean existing callers off stop_machine_run() 2008-07-28 12:16:31 +10:00
machine_kexec.c [S390] Cleanup kprobes printk messages. 2008-07-14 10:02:24 +02:00
mem_detect.c [S390] Remove diag 0x260 call from memory detection. 2008-08-01 16:39:34 +02:00
module.c [S390] Use generic bug. 2007-04-27 16:01:42 +02:00
process.c [S390] Fix uninitialized spinlock use 2008-08-21 19:46:39 +02:00
ptrace.c [S390] CVE-2008-1514: prevent ptrace padding area read/write in 31-bit mode 2008-09-09 12:39:06 +02:00
reipl.S [S390] reipl: move dump_prefix_page out of text section. 2007-03-05 23:35:43 +01:00
reipl64.S [S390] reipl: move dump_prefix_page out of text section. 2007-03-05 23:35:43 +01:00
relocate_kernel.S [S390] Reset infrastructure for re-IPL. 2006-12-04 15:40:26 +01:00
relocate_kernel64.S [S390] Reset infrastructure for re-IPL. 2006-12-04 15:40:26 +01:00
s390_ext.c [S390] Fix a lot of sparse warnings. 2008-04-17 07:47:06 +02:00
s390_ksyms.c Generic semaphore implementation 2008-04-17 10:42:34 -04:00
setup.c s390: use virtio_console for KVM on s390 2008-07-25 12:06:07 +10:00
signal.c [S390] Fix a lot of sparse warnings. 2008-04-17 07:47:06 +02:00
smp.c [S390] Remove unneeded spinlock initialization. 2008-08-21 19:46:39 +02:00
stacktrace.c [S390] Fix stacktrace compile bug. 2008-07-17 17:22:09 +02:00
sys_s390.c unified (weak) sys_pipe implementation 2008-05-03 13:50:33 -07:00
syscalls.S [S390] Wire up new syscalls. 2008-08-01 16:39:32 +02:00
time.c [S390] stp: fix section mismatch warning. 2008-08-01 16:39:34 +02:00
topology.c S390 topology: don't use kthread() for arch_reinit_sched_domains() 2008-07-25 10:53:40 -07:00
traps.c [S390] Move show_regs to traps.c. 2008-04-30 13:38:43 +02:00
vmlinux.lds.S [S390] Fix linker script. 2008-08-25 18:15:01 +02:00
vtime.c [S390] Cleanup vtime printk messages. 2008-07-14 10:02:18 +02:00