Date: Fri, 27 Jul 2018 05:40:03 +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-11@freebsd.org Subject: svn commit: r336755 - stable/11/sbin/fsck_msdosfs Message-ID: <201807270540.w6R5e37o018258@repo.freebsd.org>
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Author: delphij Date: Fri Jul 27 05:40:03 2018 New Revision: 336755 URL: https://svnweb.freebsd.org/changeset/base/336755 Log: MFC r336236: Detect and handle invalid number of FATs. Modified: stable/11/sbin/fsck_msdosfs/boot.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sbin/fsck_msdosfs/boot.c ============================================================================== --- stable/11/sbin/fsck_msdosfs/boot.c Fri Jul 27 05:21:20 2018 (r336754) +++ stable/11/sbin/fsck_msdosfs/boot.c Fri Jul 27 05:40:03 2018 (r336755) @@ -87,6 +87,10 @@ readboot(int dosfs, struct bootblock *boot) pfatal("Invalid sector size: %u", boot->bpbBytesPerSec); return FSFATAL; } + if (boot->bpbFATs == 0) { + pfatal("Invalid number of FATs: %u", boot->bpbFATs); + return FSFATAL; + } if (!boot->bpbRootDirEnts) boot->flags |= FAT32; if (boot->flags & FAT32) {
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