diff options
| -rw-r--r-- | lib/stackdepot.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/lib/stackdepot.c b/lib/stackdepot.c index 81c69c08d1d1..1ec36ee344e0 100644 --- a/lib/stackdepot.c +++ b/lib/stackdepot.c @@ -202,9 +202,20 @@ unsigned int stack_depot_fetch(depot_stack_handle_t handle, unsigned long **entries) { union handle_parts parts = { .handle = handle }; - void *slab = stack_slabs[parts.slabindex]; + void *slab; size_t offset = parts.offset << STACK_ALLOC_ALIGN; - struct stack_record *stack = slab + offset; + struct stack_record *stack; + + *entries = NULL; + if (parts.slabindex > depot_index) { + WARN(1, "slab index %d out of bounds (%d) for stack id %08x\n", + parts.slabindex, depot_index, handle); + return 0; + } + slab = stack_slabs[parts.slabindex]; + if (!slab) + return 0; + stack = slab + offset; *entries = stack->entries; return stack->size; |