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[Qemu-devel] [PULL 11/31] scsi: mptsas: infinite loop while fetching req
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PULL 11/31] scsi: mptsas: infinite loop while fetching requests |
Date: |
Fri, 27 May 2016 12:06:24 +0200 |
From: Prasad J Pandit <address@hidden>
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 <address@hidden>
Signed-off-by: Prasad J Pandit <address@hidden>
Cc: address@hidden
Message-Id: <address@hidden>
Signed-off-by: Paolo Bonzini <address@hidden>
---
hw/scsi/mptsas.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/hw/scsi/mptsas.c b/hw/scsi/mptsas.c
index 499c146..be88e16 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);
}
--
2.5.5
- [Qemu-devel] [PULL 00/31] Misc changes for 2016-05-27, Paolo Bonzini, 2016/05/27
- [Qemu-devel] [PULL 03/31] hw/char: QOM'ify escc.c, Paolo Bonzini, 2016/05/27
- [Qemu-devel] [PULL 04/31] hw/char: QOM'ify etraxfs_ser.c, Paolo Bonzini, 2016/05/27
- [Qemu-devel] [PULL 01/31] Add optionrom compatible with fw_cfg DMA version, Paolo Bonzini, 2016/05/27
- [Qemu-devel] [PULL 05/31] hw/char: QOM'ify lm32_juart.c, Paolo Bonzini, 2016/05/27
- [Qemu-devel] [PULL 08/31] nbd: Don't trim unrequested bytes, Paolo Bonzini, 2016/05/27
- [Qemu-devel] [PULL 06/31] hw/char: QOM'ify lm32_uart.c, Paolo Bonzini, 2016/05/27
- [Qemu-devel] [PULL 02/31] Revert "memory: Drop FlatRange.romd_mode", Paolo Bonzini, 2016/05/27
- [Qemu-devel] [PULL 07/31] hw/char: QOM'ify milkymist-uart.c, Paolo Bonzini, 2016/05/27
- [Qemu-devel] [PULL 11/31] scsi: mptsas: infinite loop while fetching requests,
Paolo Bonzini <=
- [Qemu-devel] [PULL 13/31] scsi: megasas: initialise local configuration data buffer, Paolo Bonzini, 2016/05/27
- [Qemu-devel] [PULL 14/31] scsi: megasas: check 'read_queue_head' index value, Paolo Bonzini, 2016/05/27
- [Qemu-devel] [PULL 10/31] scsi: pvscsi: check command descriptor ring buffer size (CVE-2016-4952), Paolo Bonzini, 2016/05/27
- [Qemu-devel] [PULL 09/31] kvm_stat: Remove, Paolo Bonzini, 2016/05/27
- [Qemu-devel] [PULL 12/31] scsi: megasas: use appropriate property buffer size, Paolo Bonzini, 2016/05/27
- [Qemu-devel] [PULL 15/31] block/iscsi: avoid potential overflow of acb->task->cdb, Paolo Bonzini, 2016/05/27
- [Qemu-devel] [PULL 18/31] atomics: emit an smp_read_barrier_depends() barrier only for Alpha and Thread Sanitizer, Paolo Bonzini, 2016/05/27
- [Qemu-devel] [PULL 20/31] docs/atomics: update comparison with Linux, Paolo Bonzini, 2016/05/27
- [Qemu-devel] [PULL 17/31] docs/atomics: update atomic_read/set comparison with Linux, Paolo Bonzini, 2016/05/27
- [Qemu-devel] [PULL 16/31] bt: rewrite csrhci_write to avoid out-of-bounds writes, Paolo Bonzini, 2016/05/27