diff options
| author | Jan Kara <jack@suse.cz> | 2018-11-16 13:43:17 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-12-05 19:32:06 +0100 |
| commit | 949ddf8039bffb29a791061ab40175b592d0b57c (patch) | |
| tree | 810b2e0e2eca771fc3de1bc05e7a65f4907e2660 /fs/udf/super.c | |
| parent | 01fb21bf2424786fa0632768ba8fd879c0feee87 (diff) | |
udf: Allow mounting volumes with incorrect identification strings
commit b54e41f5efcb4316b2f30b30c2535cc194270373 upstream.
Commit c26f6c615788 ("udf: Fix conversion of 'dstring' fields to UTF8")
started to be more strict when checking whether converted strings are
properly formatted. Sudip reports that there are DVDs where the volume
identification string is actually too long - UDF reports:
[ 632.309320] UDF-fs: incorrect dstring lengths (32/32)
during mount and fails the mount. This is mostly harmless failure as we
don't need volume identification (and even less volume set
identification) for anything. So just truncate the volume identification
string if it is too long and replace it with 'Invalid' if we just cannot
convert it for other reasons. This keeps slightly incorrect media still
mountable.
CC: stable@vger.kernel.org
Fixes: c26f6c615788 ("udf: Fix conversion of 'dstring' fields to UTF8")
Reported-and-tested-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/udf/super.c')
| -rw-r--r-- | fs/udf/super.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/fs/udf/super.c b/fs/udf/super.c index b997e3116e370..c495db7165aee 100644 --- a/fs/udf/super.c +++ b/fs/udf/super.c @@ -831,16 +831,20 @@ static int udf_load_pvoldesc(struct super_block *sb, sector_t block) ret = udf_dstrCS0toChar(sb, outstr, 31, pvoldesc->volIdent, 32); - if (ret < 0) - goto out_bh; - - strncpy(UDF_SB(sb)->s_volume_ident, outstr, ret); + if (ret < 0) { + strcpy(UDF_SB(sb)->s_volume_ident, "InvalidName"); + pr_warn("incorrect volume identification, setting to " + "'InvalidName'\n"); + } else { + strncpy(UDF_SB(sb)->s_volume_ident, outstr, ret); + } udf_debug("volIdent[] = '%s'\n", UDF_SB(sb)->s_volume_ident); ret = udf_dstrCS0toChar(sb, outstr, 127, pvoldesc->volSetIdent, 128); - if (ret < 0) + if (ret < 0) { + ret = 0; goto out_bh; - + } outstr[ret] = 0; udf_debug("volSetIdent[] = '%s'\n", outstr); |