Re: [PATCH] x86/stacktrace: Fix infinite loop in arch_stack_walk_user()

On Wed, Jul 10, 2019 at 7:35 PM Eiichi Tsukata wrote: > > Once we find a lack of return address, there is no need to continue > loop, so let's break out. Looks good to me, feel free to add Acked-by: Linus Torvalds and I'll assume this comes through the x86 -tip tree.. Linus

[PATCH] x86/stacktrace: Fix infinite loop in arch_stack_walk_user()

Current arch_stack_walk_user() checks `if (fp == frame.next_fp)` to prevent infinite loop by self reference but it's not enogh for circular reference. Once we find a lack of return address, there is no need to continue loop, so let's break out. Fixes: 02b67518e2b1 ("tracing: add support for users