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| author | Ilya Dryomov <idryomov@gmail.com> | 2015-09-14 15:01:05 +0200 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2015-09-17 19:14:15 +0200 |
| commit | 7f61f545657281a3a1b0faf68993165ebdecc51b (patch) | |
| tree | d405e22c3eaeb3cb6071ca0fa46b4e8c7c909350 /net/ceph | |
| parent | Linux 4.3-rc1 (diff) | |
| download | linux-7f61f545657281a3a1b0faf68993165ebdecc51b.tar.xz linux-7f61f545657281a3a1b0faf68993165ebdecc51b.zip | |
libceph: don't access invalid memory in keepalive2 path
This
struct ceph_timespec ceph_ts;
...
con_out_kvec_add(con, sizeof(ceph_ts), &ceph_ts);
wraps ceph_ts into a kvec and adds it to con->out_kvec array, yet
ceph_ts becomes invalid on return from prepare_write_keepalive(). As
a result, we send out bogus keepalive2 stamps. Fix this by encoding
into a ceph_timespec member, similar to how acks are read and written.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Yan, Zheng <zyan@redhat.com>
Diffstat (limited to 'net/ceph')
| -rw-r--r-- | net/ceph/messenger.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c index 525f454f7531..b9b0e3b5da49 100644 --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -1353,11 +1353,12 @@ static void prepare_write_keepalive(struct ceph_connection *con) dout("prepare_write_keepalive %p\n", con); con_out_kvec_reset(con); if (con->peer_features & CEPH_FEATURE_MSGR_KEEPALIVE2) { - struct timespec ts = CURRENT_TIME; - struct ceph_timespec ceph_ts; - ceph_encode_timespec(&ceph_ts, &ts); + struct timespec now = CURRENT_TIME; + con_out_kvec_add(con, sizeof(tag_keepalive2), &tag_keepalive2); - con_out_kvec_add(con, sizeof(ceph_ts), &ceph_ts); + ceph_encode_timespec(&con->out_temp_keepalive2, &now); + con_out_kvec_add(con, sizeof(con->out_temp_keepalive2), + &con->out_temp_keepalive2); } else { con_out_kvec_add(con, sizeof(tag_keepalive), &tag_keepalive); } |