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| author | Li Qiang <liq3ea@163.com> | 2020-08-15 07:19:40 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-09-30 19:09:20 +0200 |
| commit | 4773a5f35b0d83674f92816a226a594b03bbcf60 (patch) | |
| tree | a35d82d80af66bbf14c52a7433f7e7e8e6dfeae2 /hw | |
| parent | 5ecfbae201d68a2f13df233260c77b0a25d7cd35 (diff) | |
| download | qemu-4773a5f35b0d83674f92816a226a594b03bbcf60.zip qemu-4773a5f35b0d83674f92816a226a594b03bbcf60.tar.gz qemu-4773a5f35b0d83674f92816a226a594b03bbcf60.tar.bz2 | |
hw: megasas: consider 'iov_count=0' is an error in megasas_map_sgl
Currently in 'megasas_map_sgl' when 'iov_count=0' will just return
success however the 'cmd' doens't contain any iov. This will cause
the assert in 'scsi_dma_complete' failed. This is because in
'dma_blk_cb' the 'dbs->sg_cur_index == dbs->sg->nsg' will be true
and just call 'dma_complete'. However now there is no aiocb returned.
This fixes the LP#1878263:
-->https://bugs.launchpad.net/qemu/+bug/1878263
Reported-by: Alexander Bulekov <alxndr@bu.edu>
Signed-off-by: Li Qiang <liq3ea@163.com>
Message-Id: <20200815141940.44025-3-liq3ea@163.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/scsi/megasas.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c index 4cc709d..e24c12d 100644 --- a/hw/scsi/megasas.c +++ b/hw/scsi/megasas.c @@ -277,7 +277,7 @@ static int megasas_map_sgl(MegasasState *s, MegasasCmd *cmd, union mfi_sgl *sgl) cmd->flags = le16_to_cpu(cmd->frame->header.flags); iov_count = cmd->frame->header.sge_count; - if (iov_count > MEGASAS_MAX_SGE) { + if (!iov_count || iov_count > MEGASAS_MAX_SGE) { trace_megasas_iovec_sgl_overflow(cmd->index, iov_count, MEGASAS_MAX_SGE); return -1; |