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Diffstat (limited to 'drivers/staging/erofs/zmap.c')
| -rw-r--r-- | drivers/staging/erofs/zmap.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/staging/erofs/zmap.c b/drivers/staging/erofs/zmap.c index c2359321ca13..30e6d02d30de 100644 --- a/drivers/staging/erofs/zmap.c +++ b/drivers/staging/erofs/zmap.c @@ -350,6 +350,12 @@ static int vle_extent_lookback(struct z_erofs_maprecorder *m, switch (m->type) { case Z_EROFS_VLE_CLUSTER_TYPE_NONHEAD: + if (!m->delta[0]) { + errln("invalid lookback distance 0 at nid %llu", + vi->nid); + DBG_BUGON(1); + return -EIO; + } return vle_extent_lookback(m, m->delta[0]); case Z_EROFS_VLE_CLUSTER_TYPE_PLAIN: map->m_flags &= ~EROFS_MAP_ZIPPED; |