Date: Tue, 14 Jan 2020 06:28:08 +0000 (UTC) From: Xin LI <delphij@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r356722 - stable/12/sbin/fsck_msdosfs Message-ID: <202001140628.00E6S85L048435@repo.freebsd.org>
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Author: delphij Date: Tue Jan 14 06:28:07 2020 New Revision: 356722 URL: https://svnweb.freebsd.org/changeset/base/356722 Log: MFC r356628: Require FAT to occupy at least one sector. Modified: stable/12/sbin/fsck_msdosfs/boot.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sbin/fsck_msdosfs/boot.c ============================================================================== --- stable/12/sbin/fsck_msdosfs/boot.c Tue Jan 14 06:15:41 2020 (r356721) +++ stable/12/sbin/fsck_msdosfs/boot.c Tue Jan 14 06:28:07 2020 (r356722) @@ -253,7 +253,7 @@ readboot(int dosfs, struct bootblock *boot) boot->FATsecs = boot->bpbFATsmall; } - if (boot->FATsecs > UINT32_MAX / boot->bpbFATs) { + if (boot->FATsecs < 1 || boot->FATsecs > UINT32_MAX / boot->bpbFATs) { pfatal("Invalid FATs(%u) with FATsecs(%zu)", boot->bpbFATs, (size_t)boot->FATsecs); return FSFATAL;
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