ef3122e909
For stack frames larger than StackBig, the stack split prologue needs to guard against potential wraparound. Currently, it carefully arranges to avoid underflow, but this is complicated and requires a special check for StackPreempt. StackPreempt is no longer the only stack poison value, so this check will incorrectly succeed if the stack bound is poisoned with any other value. This CL simplifies the logic of the check, reduces its length, and accounts for any possible poison value by directly checking for underflow. Change-Id: I917a313102d6a21895ef7c4b0f304fb84b292c81 Reviewed-on: https://go-review.googlesource.com/c/go/+/307010 Trust: Austin Clements <austin@google.com> Run-TryBot: Austin Clements <austin@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com> Reviewed-by: Than McIntosh <thanm@google.com> |
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SECURITY.md |
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