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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2013-09-02 10:22:21 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-09-30 13:04:38 +0200 |
| commit | 742343551165f314c740a41b070d0fc7fbe202f7 (patch) | |
| tree | 4ef1ff8c2561438ecdde87b9bf0944d80914f0e3 /arch/s390/kernel | |
| parent | 8f0ba630af45235a6866054704531d49e524e49a (diff) | |
| download | linux-742343551165f314c740a41b070d0fc7fbe202f7.tar.gz linux-742343551165f314c740a41b070d0fc7fbe202f7.tar.bz2 linux-742343551165f314c740a41b070d0fc7fbe202f7.zip | |
s390/kprobes: add exrl to list of prohibited opcodes
"execute relative long" may have all sorts of side effects dependend on
the instructions it executes.
Therefore prohibit setting a kprobe on exrl just like we do for the
regular execute instruction.
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')
| -rw-r--r-- | arch/s390/kernel/kprobes.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/s390/kernel/kprobes.c b/arch/s390/kernel/kprobes.c index 0ce9fb245034..d86e64eddb42 100644 --- a/arch/s390/kernel/kprobes.c +++ b/arch/s390/kernel/kprobes.c @@ -67,6 +67,11 @@ static int __kprobes is_prohibited_opcode(kprobe_opcode_t *insn) case 0xac: /* stnsm */ case 0xad: /* stosm */ return -EINVAL; + case 0xc6: + switch (insn[0] & 0x0f) { + case 0x00: /* exrl */ + return -EINVAL; + } } switch (insn[0]) { case 0x0101: /* pr */ @@ -180,7 +185,6 @@ static int __kprobes is_insn_relative_long(kprobe_opcode_t *insn) break; case 0xc6: switch (insn[0] & 0x0f) { - case 0x00: /* exrl */ case 0x02: /* pfdrl */ case 0x04: /* cghrl */ case 0x05: /* chrl */ |