Date: Fri, 20 May 2022 21:04:16 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 264021] efi: failed to allocate staging area: 9 Message-ID: <bug-264021-227-Ckk5tygOee@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-264021-227@https.bugs.freebsd.org/bugzilla/> References: <bug-264021-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D264021 Jessica Clarke <jrtc27@freebsd.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jrtc27@freebsd.org --- Comment #8 from Jessica Clarke <jrtc27@freebsd.org> --- I doubt efihdr is the problem. It's likely that the call to BS->GetMemoryMap the first time round the loop, which is guaranteed to be executed, reads an uninitialised mm, and thus we have trivially provably guaranteed UB ("The v= alue of an object with automatic storage duration is used while it is indeterminate"). What value it takes doesn't matter as the first time round= the loop we use sz =3D 0 so, unless the memory map has 0 entries, it's guarante= ed to fit, but it must be initialised to something determinate. Minimal-ish reproducer: https://godbolt.org/z/KTvd73osd --=20 You are receiving this mail because: You are the assignee for the bug.=
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