diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2018-06-26 15:39:18 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2018-06-28 19:05:35 +0200 |
| commit | aad10040d411d21542dc9ae58a2854c89ccedd78 (patch) | |
| tree | 22f095148df48091b0b7633a5a9884028804ec29 | |
| parent | 86933b4e7879e427e03365bf352c0964640cb37b (diff) | |
pr-manager-helper: avoid SIGSEGV when writing to the socket fail
When writing to the qemu-pr-helper socket failed, the persistent
reservation manager was correctly disconnecting the socket, but it
did not clear pr_mgr->ioc. So the rest of the code did not know
that the socket had been disconnected, accessed pr_mgr->ioc and
happily caused a crash.
To reproduce, it is enough to stop qemu-pr-helper between QEMU
startup and executing e.g. sg_persist -k /dev/sdb.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | scsi/pr-manager-helper.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/scsi/pr-manager-helper.c b/scsi/pr-manager-helper.c index 82ff6b6123..0c0fe389b7 100644 --- a/scsi/pr-manager-helper.c +++ b/scsi/pr-manager-helper.c @@ -71,6 +71,7 @@ static int pr_manager_helper_write(PRManagerHelper *pr_mgr, if (n_written <= 0) { assert(n_written != QIO_CHANNEL_ERR_BLOCK); object_unref(OBJECT(pr_mgr->ioc)); + pr_mgr->ioc = NULL; return n_written < 0 ? -EINVAL : 0; } |