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| author | Dave Brolley <brolley@redhat.com> | 2009-09-04 12:35:26 -0400 |
|---|---|---|
| committer | Dave Brolley <brolley@redhat.com> | 2009-09-04 12:35:26 -0400 |
| commit | e8d12bbfb8dcdd494b9ecd9d4d4a275d5a8c6124 (patch) | |
| tree | 118f3e2fd0580a284ae8f37173fa2065cfc2d037 | |
| parent | a5d268f35032292b8f85cc75a316930ed0b95aab (diff) | |
| download | systemtap-steved-e8d12bbfb8dcdd494b9ecd9d4d4a275d5a8c6124.tar.gz systemtap-steved-e8d12bbfb8dcdd494b9ecd9d4d4a275d5a8c6124.tar.xz systemtap-steved-e8d12bbfb8dcdd494b9ecd9d4d4a275d5a8c6124.zip | |
Check for bad address range or size in lookup_bad_addr.
| -rw-r--r-- | runtime/addr-map.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/runtime/addr-map.c b/runtime/addr-map.c index 8c0e84d8..a9aa8d88 100644 --- a/runtime/addr-map.c +++ b/runtime/addr-map.c @@ -110,6 +110,10 @@ lookup_bad_addr(unsigned long addr, size_t size) { struct addr_map_entry* result = 0; + /* Is this a valid memory access? */ + if (size == 0 || ULONG_MAX - addr < size - 1) + return 1; + #ifndef STP_PRIVILEGED /* Unprivileged users must not access kernel space memory. */ if (addr + size > TASK_SIZE) |