diff options
Diffstat (limited to 'lib/libstand/cd9660.c')
| -rw-r--r-- | lib/libstand/cd9660.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/lib/libstand/cd9660.c b/lib/libstand/cd9660.c index c6bcef2..09cc7f8 100644 --- a/lib/libstand/cd9660.c +++ b/lib/libstand/cd9660.c @@ -151,9 +151,14 @@ susp_lookup_record(struct open_file *f, const char *identifier, return (NULL); p = susp_buffer + isonum_733(shc->offset); end = p + isonum_733(shc->length); - } else + } else { /* Ignore this record and skip to the next. */ p += isonum_711(sh->length); + + /* Avoid infinite loops with corrupted file systems */ + if (isonum_711(sh->length) == 0) + return (NULL); + } } return (NULL); } @@ -281,7 +286,7 @@ cd9660_open(const char *path, struct open_file *f) buf = malloc(buf_size = ISO_DEFAULT_BLOCK_SIZE); vd = buf; for (bno = 16;; bno++) { - twiddle(); + twiddle(1); rc = f->f_dev->dv_strategy(f->f_devdata, F_READ, cdb2devb(bno), ISO_DEFAULT_BLOCK_SIZE, buf, &read); if (rc) @@ -314,7 +319,7 @@ cd9660_open(const char *path, struct open_file *f) while (off < dsize) { if ((off % ISO_DEFAULT_BLOCK_SIZE) == 0) { - twiddle(); + twiddle(1); rc = f->f_dev->dv_strategy (f->f_devdata, F_READ, cdb2devb(bno + boff), @@ -374,7 +379,7 @@ cd9660_open(const char *path, struct open_file *f) /* Check for Rock Ridge since we didn't in the loop above. */ bno = isonum_733(rec.extent) + isonum_711(rec.ext_attr_length); - twiddle(); + twiddle(1); rc = f->f_dev->dv_strategy(f->f_devdata, F_READ, cdb2devb(bno), ISO_DEFAULT_BLOCK_SIZE, buf, &read); if (rc) @@ -431,7 +436,7 @@ buf_read_file(struct open_file *f, char **buf_p, size_t *size_p) if (fp->f_buf == (char *)0) fp->f_buf = malloc(ISO_DEFAULT_BLOCK_SIZE); - twiddle(); + twiddle(16); rc = f->f_dev->dv_strategy(f->f_devdata, F_READ, cdb2devb(blkno), ISO_DEFAULT_BLOCK_SIZE, fp->f_buf, &read); if (rc) |
