diff options
| author | Evgeny Yakovlev <eyakovlev@virtuozzo.com> | 2016-07-29 12:48:25 +0300 |
|---|---|---|
| committer | Amit Shah <amit.shah@redhat.com> | 2016-08-11 16:59:38 +0530 |
| commit | 0e8b3cdfbc167f4bb7790ef744eaa1ac0e6959f9 (patch) | |
| tree | b6b358436127ea57c3e02e71ecaad48011df88cb | |
| parent | e110aa919a84e6454017b60b222344f3ac6038b5 (diff) | |
migration: mmap error check fix
mmap man page:
"On success, mmap() returns a pointer to the mapped area. On error, the
value MAP_FAILED (that is, (void *) -1) is returned, and errno is set
to indicate the cause of the error."
The check in postcopy_get_tmp_page is definitely wrong and should be
fixed.
Signed-off-by: Evgeny Yakovlev <eyakovlev@virtuozzo.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
CC: Juan Quintela <quintela@redhat.com>
CC: Amit Shah <amit.shah@redhat.com>
Message-Id: <1469785705-16670-1-git-send-email-den@openvz.org>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
| -rw-r--r-- | migration/postcopy-ram.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/migration/postcopy-ram.c b/migration/postcopy-ram.c index abe8c60a90..9b0477835f 100644 --- a/migration/postcopy-ram.c +++ b/migration/postcopy-ram.c @@ -604,7 +604,8 @@ void *postcopy_get_tmp_page(MigrationIncomingState *mis) mis->postcopy_tmp_page = mmap(NULL, getpagesize(), PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); - if (!mis->postcopy_tmp_page) { + if (mis->postcopy_tmp_page == MAP_FAILED) { + mis->postcopy_tmp_page = NULL; error_report("%s: %s", __func__, strerror(errno)); return NULL; } |