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| author | Eric Blake | 2018-05-01 17:46:53 +0200 |
|---|---|---|
| committer | Eric Blake | 2018-05-04 15:23:37 +0200 |
| commit | e475d108f1b3d3163f0affea67cdedbe5fc9752b (patch) | |
| tree | 997a49f63acf1d40fe9157fe752acff0f2a6a9da /nbd | |
| parent | migration/block-dirty-bitmap: fix memory leak in dirty_bitmap_load_bits (diff) | |
| download | qemu-e475d108f1b3d3163f0affea67cdedbe5fc9752b.tar.gz qemu-e475d108f1b3d3163f0affea67cdedbe5fc9752b.tar.xz qemu-e475d108f1b3d3163f0affea67cdedbe5fc9752b.zip | |
nbd/client: Fix error messages during NBD_INFO_BLOCK_SIZE
A missing space makes for poor error messages, and sizes can't
go negative. Also, we missed diagnosing a server that sends
a maximum block size less than the minimum.
Fixes: 081dd1fe
CC: qemu-stable@nongnu.org
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20180501154654.943782-1-eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Diffstat (limited to 'nbd')
| -rw-r--r-- | nbd/client.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/nbd/client.c b/nbd/client.c index 7f35b5c323..232ff4f46d 100644 --- a/nbd/client.c +++ b/nbd/client.c @@ -435,8 +435,8 @@ static int nbd_opt_go(QIOChannel *ioc, const char *wantname, } be32_to_cpus(&info->min_block); if (!is_power_of_2(info->min_block)) { - error_setg(errp, "server minimum block size %" PRId32 - "is not a power of two", info->min_block); + error_setg(errp, "server minimum block size %" PRIu32 + " is not a power of two", info->min_block); nbd_send_opt_abort(ioc); return -1; } @@ -450,8 +450,8 @@ static int nbd_opt_go(QIOChannel *ioc, const char *wantname, be32_to_cpus(&info->opt_block); if (!is_power_of_2(info->opt_block) || info->opt_block < info->min_block) { - error_setg(errp, "server preferred block size %" PRId32 - "is not valid", info->opt_block); + error_setg(errp, "server preferred block size %" PRIu32 + " is not valid", info->opt_block); nbd_send_opt_abort(ioc); return -1; } @@ -462,6 +462,12 @@ static int nbd_opt_go(QIOChannel *ioc, const char *wantname, return -1; } be32_to_cpus(&info->max_block); + if (info->max_block < info->min_block) { + error_setg(errp, "server maximum block size %" PRIu32 + " is not valid", info->max_block); + nbd_send_opt_abort(ioc); + return -1; + } trace_nbd_opt_go_info_block_size(info->min_block, info->opt_block, info->max_block); break; |