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uefisign: fix SizeOfHeaders sanity check.

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This check was too aggressive: it is fine if SizeOfHeaders is exactly
equal to the size of the DOS stub + PE header + section table. Despite
being wrong this code typically worked for most EFI binaries because
SizeOfHeaders is rounded up to a multiple of FileAlignment, which is
often large (e.g., 512 bytes for the FreeBSD loader) so most binaries
made it through.

Reviewed by:	imp@
Sponsored by:	Netflix
Pull Request:	https://github.com/freebsd/freebsd-src/pull/445
This commit is contained in:
Kenneth Camann 2021-01-02 21:11:42 -05:00 committed by Warner Losh
parent 37f780d3e0
commit 5deb350025
1 changed files with 1 additions and 1 deletions
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2
usr.sbin/uefisign/pe.c
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@ -232,7 +232,7 @@ parse_section_table(struct executable *x, off_t off, int number_of_sections)
range_check(x, off, sizeof(*psh) * number_of_sections,
"section table");
if (x->x_headers_len <= off + sizeof(*psh) * number_of_sections)
if (x->x_headers_len < off + sizeof(*psh) * number_of_sections)
errx(1, "section table outside of headers");
psh = (const struct pe_section_header *)(x->x_buf + off);