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| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2012-08-08 02:14:13 +0200 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2012-08-17 08:36:55 +0200 |
| commit | 1d2a2cd95ee0137a2353d1b5635739c281f27cd4 (patch) | |
| tree | a5529f0b252c9f7d828c03ffa6920a94466ab57f | |
| parent | tcm_vhost: Change vhost_scsi_target->vhost_wwpn to char * (diff) | |
| download | linux-1d2a2cd95ee0137a2353d1b5635739c281f27cd4.tar.xz linux-1d2a2cd95ee0137a2353d1b5635739c281f27cd4.zip | |
target/pscsi: Fix bug with REPORT_LUNs handling for SCSI passthrough
This patch fixes a regression bug in pscsi_transport_complete() callback
code where *pt was being NULL dereferenced during REPORT_LUNS handling,
that was introduced with the spc/sbc refactoring in:
commit 1fd032ee10d2816c947f5d5b9abda95e728f0a8f
Author: Christoph Hellwig <hch@infradead.org>
Date: Sun May 20 11:59:15 2012 -0400
target: move code for CDB emulation
As this is a special case for pscsi_parse_cdb() to call spc_parse_cdb() to
allow TCM to handle REPORT_LUN emulation, pscsi_plugin_task will have not
been allocated..
So now in pscsi_transport_complete() just check for existence of *pt and
return for this special case.
Reported-by: Alex Elsayed <eternaleye+usenet@gmail.com>
Cc: Alex Elsayed <eternaleye+usenet@gmail.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| -rw-r--r-- | drivers/target/target_core_pscsi.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c index 6e32ff6f2fa0..5552fa7426bc 100644 --- a/drivers/target/target_core_pscsi.c +++ b/drivers/target/target_core_pscsi.c @@ -673,8 +673,15 @@ static int pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg) struct scsi_device *sd = pdv->pdv_sd; int result; struct pscsi_plugin_task *pt = cmd->priv; - unsigned char *cdb = &pt->pscsi_cdb[0]; + unsigned char *cdb; + /* + * Special case for REPORT_LUNs handling where pscsi_plugin_task has + * not been allocated because TCM is handling the emulation directly. + */ + if (!pt) + return 0; + cdb = &pt->pscsi_cdb[0]; result = pt->pscsi_result; /* * Hack to make sure that Write-Protect modepage is set if R/O mode is |