AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-11-30 14:26:42 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

IB/ipath: Fix possible data corruption if multiple SGEs used for receive

Browse Source 
The code to copy data from the receive queue buffers to the IB SGEs
doesn't check the SGE length, only the memory region/page length when
copying data.  This could overwrite parts of the user's memory that
were not intended to be written.  It can only happen if multiple SGEs
are used to describe a receive buffer which almost never happens in
practice.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Ralph Campbell 2007-06-18 14:24:44 -07:00 committed by Roland Dreier
parent db5518cd09
commit 30d149ab58
3 changed files with 10 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/infiniband/hw/ipath/ipath_ruc.c
View File

@ -396,6 +396,8 @@ static void ipath_ruc_loopback(struct ipath_qp *sqp)
if (len > sge->length)
len = sge->length;
if (len > sge->sge_length)
len = sge->sge_length;
BUG_ON(len == 0);
ipath_copy_sge(&qp->r_sge, sge->vaddr, len);
sge->vaddr += len;

2
drivers/infiniband/hw/ipath/ipath_ud.c
View File

@ -231,6 +231,8 @@ static void ipath_ud_loopback(struct ipath_qp *sqp,
if (len > length)
len = length;
if (len > sge->sge_length)
len = sge->sge_length;
BUG_ON(len == 0);
ipath_copy_sge(&rsge, sge->vaddr, len);
sge->vaddr += len;

8
drivers/infiniband/hw/ipath/ipath_verbs.c
View File

@ -164,9 +164,11 @@ void ipath_copy_sge(struct ipath_sge_state *ss, void *data, u32 length)
while (length) {
u32 len = sge->length;
BUG_ON(len == 0);
if (len > length)
len = length;
if (len > sge->sge_length)
len = sge->sge_length;
BUG_ON(len == 0);
memcpy(sge->vaddr, data, len);
sge->vaddr += len;
sge->length -= len;
@ -202,9 +204,11 @@ void ipath_skip_sge(struct ipath_sge_state *ss, u32 length)
while (length) {
u32 len = sge->length;
BUG_ON(len == 0);
if (len > length)
len = length;
if (len > sge->sge_length)
len = sge->sge_length;
BUG_ON(len == 0);
sge->vaddr += len;
sge->length -= len;
sge->sge_length -= len;