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authorKashyap, Desai <kashyap.desai@lsi.com>2010-11-13 00:01:14 +0100
committerJames Bottomley <James.Bottomley@suse.de>2010-12-21 19:24:03 +0100
commitdd3741d30300f9cf1adc046773a4bb87252d96ac (patch)
tree948c762c9b1131ce0dd7d7eb8879d4c607908a58 /drivers/scsi/mpt2sas/mpt2sas_base.c
parent[SCSI] mpt2sas: Removed compiler warnnings when logging is disabled (diff)
downloadlinux-dd3741d30300f9cf1adc046773a4bb87252d96ac.tar.xz
linux-dd3741d30300f9cf1adc046773a4bb87252d96ac.zip
[SCSI] mpt2sas: Added sanity check for cb_idx and smid access.
Sometime it is seen that controller firmware returns an invalid system message id (smid). the oops is occurring becuase mpt_callbacks pointer is referenced to either null or invalid virtual address. this is due to cb_idx set incorrectly from routine _base_get_cb_idx. the cb_idx was set incorrectly becuase there is no check to make sure smid is less than maxiumum anticapted smid. to fix this issue, we add a check in _base_get_cb_idx to make sure smid is not greater than ioc->hba_queue_depth. in addition, a similar check was added to make sure the reply address was less than the largest anticapated address. Newer firmware has sovled this issue, however it good to have this sanity check. Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/mpt2sas/mpt2sas_base.c')
-rw-r--r--drivers/scsi/mpt2sas/mpt2sas_base.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.c b/drivers/scsi/mpt2sas/mpt2sas_base.c
index 12faf64f91b0..d1c53455c063 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_base.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_base.c
@@ -758,7 +758,7 @@ _base_get_cb_idx(struct MPT2SAS_ADAPTER *ioc, u16 smid)
if (smid < ioc->internal_smid) {
i = smid - ioc->hi_priority_smid;
cb_idx = ioc->hpr_lookup[i].cb_idx;
- } else {
+ } else if (smid <= ioc->hba_queue_depth) {
i = smid - ioc->internal_smid;
cb_idx = ioc->internal_lookup[i].cb_idx;
}
@@ -848,6 +848,7 @@ _base_interrupt(int irq, void *bus_id)
return IRQ_NONE;
completed_cmds = 0;
+ cb_idx = 0xFF;
do {
rd.word = rpf->Words;
if (rd.u.low == UINT_MAX || rd.u.high == UINT_MAX)
@@ -860,6 +861,9 @@ _base_interrupt(int irq, void *bus_id)
MPI2_RPY_DESCRIPT_FLAGS_ADDRESS_REPLY) {
reply = le32_to_cpu
(rpf->AddressReply.ReplyFrameAddress);
+ if (reply > ioc->reply_dma_max_address ||
+ reply < ioc->reply_dma_min_address)
+ reply = 0;
} else if (request_desript_type ==
MPI2_RPY_DESCRIPT_FLAGS_TARGET_COMMAND_BUFFER)
goto next;
@@ -2221,6 +2225,8 @@ _base_allocate_memory_pools(struct MPT2SAS_ADAPTER *ioc, int sleep_flag)
ioc->name);
goto out;
}
+ ioc->reply_dma_min_address = (u32)(ioc->reply_dma);
+ ioc->reply_dma_max_address = (u32)(ioc->reply_dma) + sz;
dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "reply pool(0x%p): depth"
"(%d), frame_size(%d), pool_size(%d kB)\n", ioc->name, ioc->reply,
ioc->reply_free_queue_depth, ioc->reply_sz, sz/1024));