[Qemu-devel] [PATCH v3 05/10] ipmi: fix SDR length value

[Cédric Le Goater]

The IPMI BMC simulator populates the SDR table with a set of initial
SDRs. The length of each SDR is taken from the record itself (byte 4)
which does not include the size of the header. But, the full length
(header + data) is required by the sdr_add_entry() routine.

Signed-off-by: Cédric Le Goater <address@hidden>
---

Changes since v2:
 - the patch does not use the struct ipmi_sdr_header anymore as it was
   moved the patch forward in the patchset
   
 hw/ipmi/ipmi_bmc_sim.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/hw/ipmi/ipmi_bmc_sim.c b/hw/ipmi/ipmi_bmc_sim.c
index 2c540c0782c9..dee2190ce059 100644
--- a/hw/ipmi/ipmi_bmc_sim.c
+++ b/hw/ipmi/ipmi_bmc_sim.c
@@ -358,7 +358,7 @@ static int sdr_find_entry(IPMISdr *sdr, uint16_t recid,
 
     while (pos < sdr->next_free) {
         uint16_t trec = sdr->sdr[pos] | (sdr->sdr[pos + 1] << 8);
-        unsigned int nextpos = pos + sdr->sdr[pos + 4];
+        unsigned int nextpos = pos + sdr->sdr[pos + 4] + 5;
 
         if (trec == recid) {
             if (nextrec) {
@@ -1166,7 +1166,7 @@ static void get_sdr(IPMIBmcSim *ibs,
         rsp[2] = IPMI_CC_REQ_ENTRY_NOT_PRESENT;
         return;
     }
-    if (cmd[6] > (ibs->sdr.sdr[pos + 4])) {
+    if (cmd[6] > (ibs->sdr.sdr[pos + 4] + 5)) {
         rsp[2] = IPMI_CC_PARM_OUT_OF_RANGE;
         return;
     }
@@ -1175,7 +1175,7 @@ static void get_sdr(IPMIBmcSim *ibs,
     IPMI_ADD_RSP_DATA((nextrec >> 8) & 0xff);
 
     if (cmd[7] == 0xff) {
-        cmd[7] = ibs->sdr.sdr[pos + 4] - cmd[6];
+        cmd[7] = ibs->sdr.sdr[pos + 4] + 5 - cmd[6];
     }
 
     if ((cmd[7] + *rsp_len) > max_rsp_len) {
@@ -1649,17 +1649,17 @@ static void ipmi_sim_init(Object *obj)
             error_report("Problem with recid 0x%4.4x", i);
             return;
         }
-        len = init_sdrs[i + 4];
+        len = init_sdrs[i + 4] + 5;
         recid = init_sdrs[i] | (init_sdrs[i + 1] << 8);
         if (recid == 0xffff) {
             break;
         }
-        if ((i + len + 5) > sizeof(init_sdrs)) {
+        if ((i + len) > sizeof(init_sdrs)) {
             error_report("Problem with recid 0x%4.4x", i);
             return;
         }
         sdr_add_entry(ibs, init_sdrs + i, len, NULL);
-        i += len + 5;
+        i += len;
     }
 
     ipmi_init_sensors_from_sdrs(ibs);
-- 
2.1.4