| commit | 05a3b1fce56a95e40512bae9f62656098f198834 | [log] [tgz] |
|---|---|---|
| author | Austin Clements <austin@google.com> | Mon Aug 24 13:35:49 2015 -0400 |
| committer | Russ Cox <rsc@golang.org> | Tue Aug 25 14:37:08 2015 +0000 |
| tree | 0a5bb8ab10f462a7d7fe885f9b577252db651e2d | |
| parent | 686d44d9e0c4e43716f8dd51ffaf81b8754f3620 [diff] |
cmd/compile: fix uninitialized memory in compare of interface value A comparison of the form l == r where l is an interface and r is concrete performs a type assertion on l to convert it to r's type. However, the compiler fails to zero the temporary where the result of the type assertion is written, so if the type is a pointer type and a stack scan occurs while in the type assertion, it may see an invalid pointer on the stack. Fix this by zeroing the temporary. This is equivalent to the fix for type switches from c4092ac. Fixes #12253. Change-Id: Iaf205d456b856c056b317b4e888ce892f0c555b9 Reviewed-on: https://go-review.googlesource.com/13872 Reviewed-by: Russ Cox <rsc@golang.org>
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