From: Eric Moore <eric.moore@lsi.com>
To: James.Bottomley@HansenPartnership.com
Cc: linux-scsi@vger.kernel.org
Subject: [PATCH 3/10] mpt2sas : fix oops when firmware sends large sense buffer size
Date: Tue, 21 Apr 2009 15:38:43 -0600 [thread overview]
Message-ID: <20090421213841.GD18563@lsil.com> (raw)
There is a bug in firmware where the reply message frame says there is a
16kb sense buffer, when in reality its only 20 bytes. This fix insures
the memcpy action doesn't corrupte the memory beyond the 90 bytes allocated in
the scsi command for sense buffer.
Signed-off-by: Eric Moore <eric.moore@lsi.com>
diff -uarpN a/drivers/scsi/mpt2sas/mpt2sas_scsih.c b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
--- a/drivers/scsi/mpt2sas/mpt2sas_scsih.c 2009-04-09 16:33:21.000000000 -0600
+++ b/drivers/scsi/mpt2sas/mpt2sas_scsih.c 2009-04-09 16:42:31.000000000 -0600
@@ -2863,8 +2863,9 @@ scsih_io_done(struct MPT2SAS_ADAPTER *io
struct sense_info data;
const void *sense_data = mpt2sas_base_get_sense_buffer(ioc,
smid);
- memcpy(scmd->sense_buffer, sense_data,
+ u32 sz = min_t(u32, SCSI_SENSE_BUFFERSIZE,
le32_to_cpu(mpi_reply->SenseCount));
+ memcpy(scmd->sense_buffer, sense_data, sz);
_scsih_normalize_sense(scmd->sense_buffer, &data);
/* failure prediction threshold exceeded */
if (data.asc == 0x5D)
reply other threads:[~2009-04-21 21:37 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20090421213841.GD18563@lsil.com \
--to=eric.moore@lsi.com \
--cc=James.Bottomley@HansenPartnership.com \
--cc=linux-scsi@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).