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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2013-09-13 16:14:10 +0400 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-10-24 19:16:50 +0400 |
| commit | 1ffa11abfe90320abe82bf5bb7eeca154e333058 (patch) | |
| tree | 4bd80efa5b44e470471a78698ac736fab6867644 /arch/s390/kernel/kprobes.c | |
| parent | a882b3b0676fa42ab29c492e56749ab00ca95c0d (diff) | |
| download | linux-1ffa11abfe90320abe82bf5bb7eeca154e333058.tar.xz | |
s390/kprobes: allow kprobes only on known instructions
Since we have an in-kernel disassembler we can make sure that
there won't be any kprobes set on random data.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/kprobes.c')
| -rw-r--r-- | arch/s390/kernel/kprobes.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/kernel/kprobes.c b/arch/s390/kernel/kprobes.c index c52fdf290301..59a9c35c4598 100644 --- a/arch/s390/kernel/kprobes.c +++ b/arch/s390/kernel/kprobes.c @@ -60,6 +60,8 @@ struct kprobe_insn_cache kprobe_dmainsn_slots = { static int __kprobes is_prohibited_opcode(kprobe_opcode_t *insn) { + if (!is_known_insn((unsigned char *)insn)) + return -EINVAL; switch (insn[0] >> 8) { case 0x0c: /* bassm */ case 0x0b: /* bsm */ |