partitions/aix: append null character to print data from disk

Even if properly initialized, the lvname array (i.e., strings)
is read from disk, and might contain corrupt data (e.g., lack
the null terminating character for strings).

So, make sure the partition name string used in pr_warn() has
the null terminating character.

Fixes: 6ceea22bbbc8 ("partitions: add aix lvm partition support files")
Suggested-by: Daniel J. Axtens <daniel.axtens@canonical.com>
Signed-off-by: Mauricio Faria de Oliveira <mfo@canonical.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/block/partitions/aix.c b/block/partitions/aix.c
index 850cbd1860d4caea26d1fb861bc5f526744c6666..903f3ed175d0263344fe33ecbe19dfaeffcb202e 100644 (file)
--- a/block/partitions/aix.c
+++ b/block/partitions/aix.c
@@ -283,10 +283,14 @@ int aix_partition(struct parsed_partitions *state)
                                next_lp_ix += 1;
                }
                for (i = 0; i < state->limit; i += 1)
-                       if (lvip[i].pps_found && !lvip[i].lv_is_contiguous)
+                       if (lvip[i].pps_found && !lvip[i].lv_is_contiguous) {
+                               char tmp[sizeof(n[i].name) + 1]; // null char
+
+                               snprintf(tmp, sizeof(tmp), "%s", n[i].name);
                                pr_warn("partition %s (%u pp's found) is "
                                        "not contiguous\n",
-                                       n[i].name, lvip[i].pps_found);
+                                       tmp, lvip[i].pps_found);
+                       }
                kfree(pvd);
        }
        kfree(n);