The patch titled isofs: fix minor filesystem corruption has been added to the -mm tree. Its filename is isofs-fix-minor-filesystem-corruption-take-3.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find out what to do about this The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: isofs: fix minor filesystem corruption From: Adam Greenblatt <adam.greenblatt@xxxxxxxxx> Some iso9660 images contain files with rockridge data that is either incorrect or incompletely parsed. Prior to commit f2966632a134e865db3c819346a1dc7d96e05309 ("[PATCH] rock: handle directory overflows") (included with kernel 2.6.13) the kernel ignored the rockridge data for these files, while still allowing the files to be accessed under their non-rockridge names. That commit inadvertently changed things so that files with invalid rockridge data could not be accessed at all. (I ran across the problem when comparing some old CDs with hard disk copies I had made long ago under kernel 2.4: a few of the files on the hard disk copies were no longer visible on the CDs.) This change reverts to the pre-2.6.13 behavior. Signed-off-by: Adam Greenblatt <adam.greenblatt@xxxxxxxxx> Cc: Pekka Enberg <penberg@xxxxxxxxxxxxxx> Cc: <stable@xxxxxxxxxx> [2.6.25.x, 2.6.26.x] Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- fs/isofs/rock.c | 22 ++++++++++++++++++++-- 1 file changed, 20 insertions(+), 2 deletions(-) diff -puN fs/isofs/rock.c~isofs-fix-minor-filesystem-corruption-take-3 fs/isofs/rock.c --- a/fs/isofs/rock.c~isofs-fix-minor-filesystem-corruption-take-3 +++ a/fs/isofs/rock.c @@ -209,6 +209,11 @@ repeat: while (rs.len > 2) { /* There may be one byte for padding somewhere */ rr = (struct rock_ridge *)rs.chr; + /* + * Ignore rock ridge info if rr->len is out of range, but + * don't return -EIO because that would make the file + * invisible. + */ if (rr->len < 3) goto out; /* Something got screwed up here */ sig = isonum_721(rs.chr); @@ -216,8 +221,12 @@ repeat: goto eio; rs.chr += rr->len; rs.len -= rr->len; + /* + * As above, just ignore the rock ridge info if rr->len + * is bogus. + */ if (rs.len < 0) - goto eio; /* corrupted isofs */ + goto out; /* Something got screwed up here */ switch (sig) { case SIG('R', 'R'): @@ -307,6 +316,11 @@ parse_rock_ridge_inode_internal(struct i repeat: while (rs.len > 2) { /* There may be one byte for padding somewhere */ rr = (struct rock_ridge *)rs.chr; + /* + * Ignore rock ridge info if rr->len is out of range, but + * don't return -EIO because that would make the file + * invisible. + */ if (rr->len < 3) goto out; /* Something got screwed up here */ sig = isonum_721(rs.chr); @@ -314,8 +328,12 @@ repeat: goto eio; rs.chr += rr->len; rs.len -= rr->len; + /* + * As above, just ignore the rock ridge info if rr->len + * is bogus. + */ if (rs.len < 0) - goto eio; /* corrupted isofs */ + goto out; /* Something got screwed up here */ switch (sig) { #ifndef CONFIG_ZISOFS /* No flag for SF or ZF */ _ Patches currently in -mm which might be from adam.greenblatt@xxxxxxxxx are isofs-fix-minor-filesystem-corruption-take-3.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html