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git2svn
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2021-05-03T12:40:41.173140Z
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svn:log
V 709
imgact_elf: Ensure that the return value in parse_notes is initialized

parse_notes relies on the caller-supplied callback to initialize "res".
Two callbacks are used in practice, brandnote_cb and note_fctl_cb, and
the latter fails to initialize res.  Fix it.

In the worst case, the bug would cause the inner loop of check_note to
examine more program headers than necessary, and the note header usually
comes last anyway.

Reviewed by:	kib
Reported by:	KMSAN
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D29986

(cherry picked from commit 409ab7e109c692014e3484a74af248dd7a4746e8)

Git Hash:   0048a3237ddbf9b83b44a82d9467d65c646e3289
Git Author: markj@FreeBSD.org
END