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libsysprof: protect against bad reads

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This commit is contained in:
Christian Hergert
2020-02-13 14:28:03 -08:00
parent 6aa6f07465
commit 3e7acd5663
1 changed files with 12 additions and 6 deletions
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18
src/libsysprof/sysprof-symbol-map.c
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@ -232,7 +232,7 @@ sysprof_symbol_map_add_resolver (SysprofSymbolMap *self,
g_ptr_array_add (self->resolvers, g_object_ref (resolver)); g_ptr_array_add (self->resolvers, g_object_ref (resolver));
} }
static void static gboolean
sysprof_symbol_map_do_alloc (SysprofSymbolMap *self, sysprof_symbol_map_do_alloc (SysprofSymbolMap *self,
SysprofCaptureReader *reader, SysprofCaptureReader *reader,
GHashTable *seen) GHashTable *seen)
@ -244,7 +244,7 @@ sysprof_symbol_map_do_alloc (SysprofSymbolMap *self,
g_assert (seen != NULL); g_assert (seen != NULL);
if (!(ev = sysprof_capture_reader_read_allocation (reader))) if (!(ev = sysprof_capture_reader_read_allocation (reader)))
return; return FALSE;
for (guint i = 0; i < ev->n_addrs; i++) for (guint i = 0; i < ev->n_addrs; i++)
{ {
@ -283,9 +283,11 @@ sysprof_symbol_map_do_alloc (SysprofSymbolMap *self,
} }
} }
} }
return TRUE;
} }
static void static gboolean
sysprof_symbol_map_do_sample (SysprofSymbolMap *self, sysprof_symbol_map_do_sample (SysprofSymbolMap *self,
SysprofCaptureReader *reader, SysprofCaptureReader *reader,
GHashTable *seen) GHashTable *seen)
@ -298,7 +300,7 @@ sysprof_symbol_map_do_sample (SysprofSymbolMap *self,
g_assert (seen != NULL); g_assert (seen != NULL);
if (!(sample = sysprof_capture_reader_read_sample (reader))) if (!(sample = sysprof_capture_reader_read_sample (reader)))
return; return FALSE;
for (guint i = 0; i < sample->n_addrs; i++) for (guint i = 0; i < sample->n_addrs; i++)
{ {
@ -344,6 +346,8 @@ sysprof_symbol_map_do_sample (SysprofSymbolMap *self,
} }
} }
} }
return TRUE;
} }
void void
@ -373,12 +377,14 @@ sysprof_symbol_map_resolve (SysprofSymbolMap *self,
{ {
if (type == SYSPROF_CAPTURE_FRAME_SAMPLE) if (type == SYSPROF_CAPTURE_FRAME_SAMPLE)
{ {
sysprof_symbol_map_do_sample (self, reader, seen); if (!sysprof_symbol_map_do_sample (self, reader, seen))
break;
continue; continue;
} }
else if (type == SYSPROF_CAPTURE_FRAME_ALLOCATION) else if (type == SYSPROF_CAPTURE_FRAME_ALLOCATION)
{ {
sysprof_symbol_map_do_alloc (self, reader, seen); if (!sysprof_symbol_map_do_alloc (self, reader, seen))
break;
continue; continue;
} }