Date: Sat, 26 Nov 2016 00:43:38 +0000 (UTC) From: Kirk McKusick <mckusick@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: r309172 - stable/11/sys/ufs/ffs Message-ID: <201611260043.uAQ0hcWs008737@repo.freebsd.org>
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Author: mckusick Date: Sat Nov 26 00:43:38 2016 New Revision: 309172 URL: https://svnweb.freebsd.org/changeset/base/309172 Log: MFC r308064: Avoid possible overflow when calclating malloc size for auxillary data structure sizes when mounting and reloading UFS/FFS filesystems. Modified: stable/11/sys/ufs/ffs/ffs_vfsops.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/ufs/ffs/ffs_vfsops.c ============================================================================== --- stable/11/sys/ufs/ffs/ffs_vfsops.c Fri Nov 25 23:28:09 2016 (r309171) +++ stable/11/sys/ufs/ffs/ffs_vfsops.c Sat Nov 26 00:43:38 2016 (r309172) @@ -588,7 +588,8 @@ ffs_reload(struct mount *mp, struct thre struct fs *fs, *newfs; struct ufsmount *ump; ufs2_daddr_t sblockloc; - int i, blks, size, error; + int i, blks, error; + u_long size; int32_t *lp; ump = VFSTOUFS(mp); @@ -658,7 +659,7 @@ ffs_reload(struct mount *mp, struct thre size += fs->fs_ncg * sizeof(int32_t); size += fs->fs_ncg * sizeof(u_int8_t); free(fs->fs_csp, M_UFSMNT); - space = malloc((u_long)size, M_UFSMNT, M_WAITOK); + space = malloc(size, M_UFSMNT, M_WAITOK); fs->fs_csp = space; for (i = 0; i < blks; i += fs->fs_frag) { size = fs->fs_bsize; @@ -751,7 +752,8 @@ ffs_mountfs(devvp, mp, td) struct cdev *dev; void *space; ufs2_daddr_t sblockloc; - int error, i, blks, size, ronly; + int error, i, blks, len, ronly; + u_long size; int32_t *lp; struct ucred *cred; struct g_consumer *cp; @@ -856,11 +858,11 @@ ffs_mountfs(devvp, mp, td) /* * Get journal provider name. */ - size = 1024; - mp->mnt_gjprovider = malloc(size, M_UFSMNT, M_WAITOK); - if (g_io_getattr("GJOURNAL::provider", cp, &size, + len = 1024; + mp->mnt_gjprovider = malloc((u_long)len, M_UFSMNT, M_WAITOK); + if (g_io_getattr("GJOURNAL::provider", cp, &len, mp->mnt_gjprovider) == 0) { - mp->mnt_gjprovider = realloc(mp->mnt_gjprovider, size, + mp->mnt_gjprovider = realloc(mp->mnt_gjprovider, len, M_UFSMNT, M_WAITOK); MNT_ILOCK(mp); mp->mnt_flag |= MNT_GJOURNAL; @@ -912,7 +914,7 @@ ffs_mountfs(devvp, mp, td) if (fs->fs_contigsumsize > 0) size += fs->fs_ncg * sizeof(int32_t); size += fs->fs_ncg * sizeof(u_int8_t); - space = malloc((u_long)size, M_UFSMNT, M_WAITOK); + space = malloc(size, M_UFSMNT, M_WAITOK); fs->fs_csp = space; for (i = 0; i < blks; i += fs->fs_frag) { size = fs->fs_bsize; @@ -997,8 +999,8 @@ ffs_mountfs(devvp, mp, td) #endif } if ((fs->fs_flags & FS_TRIM) != 0) { - size = sizeof(int); - if (g_io_getattr("GEOM::candelete", cp, &size, + len = sizeof(int); + if (g_io_getattr("GEOM::candelete", cp, &len, &ump->um_candelete) == 0) { if (!ump->um_candelete) printf("WARNING: %s: TRIM flag on fs but disk "
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