diff options
| author | Prasad J Pandit <pjp@fedoraproject.org> | 2016-05-24 13:37:44 +0530 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-05-29 09:11:10 +0200 |
| commit | 06630554ccbdd25780aa03c3548aaff1eb56dffd (patch) | |
| tree | 4f65edc5deacb417b62115f6fa3209ef5a097653 | |
| parent | 3e831b40e015ba34dfb55ff11f767001839425ff (diff) | |
scsi: mptsas: infinite loop while fetching requests
The LSI SAS1068 Host Bus Adapter emulator in Qemu, periodically
looks for requests and fetches them. A loop doing that in
mptsas_fetch_requests() could run infinitely if 's->state' was
not operational. Move check to avoid such a loop.
Reported-by: Li Qiang <liqiang6-s@360.cn>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Cc: qemu-stable@nongnu.org
Message-Id: <1464077264-25473-1-git-send-email-ppandit@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | hw/scsi/mptsas.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/hw/scsi/mptsas.c b/hw/scsi/mptsas.c index 499c1465ae..be88e161a9 100644 --- a/hw/scsi/mptsas.c +++ b/hw/scsi/mptsas.c @@ -754,11 +754,6 @@ static void mptsas_fetch_request(MPTSASState *s) hwaddr addr; int size; - if (s->state != MPI_IOC_STATE_OPERATIONAL) { - mptsas_set_fault(s, MPI_IOCSTATUS_INVALID_STATE); - return; - } - /* Read the message header from the guest first. */ addr = s->host_mfa_high_addr | MPTSAS_FIFO_GET(s, request_post); pci_dma_read(pci, addr, req, sizeof(hdr)); @@ -789,6 +784,10 @@ static void mptsas_fetch_requests(void *opaque) { MPTSASState *s = opaque; + if (s->state != MPI_IOC_STATE_OPERATIONAL) { + mptsas_set_fault(s, MPI_IOCSTATUS_INVALID_STATE); + return; + } while (!MPTSAS_FIFO_EMPTY(s, request_post)) { mptsas_fetch_request(s); } |