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IB/qib: Clear eager buffer memory for each new process 

The eager buffers are not being cleared before being mmapped into a
new user address space.  This is a potential security risk and should
be fixed.  Note that the eager header queue is already being cleared.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Ralph Campbell 2010-06-17 23:13:59 +00:00 committed by Roland Dreier
parent b9e03e0489
commit 5df4223a44
1 changed files with 3 additions and 0 deletions
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3
drivers/infiniband/hw/qib/qib_init.c
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@ -1472,6 +1472,9 @@ int qib_setup_eagerbufs(struct qib_ctxtdata *rcd)
dma_addr_t pa = rcd->rcvegrbuf_phys[chunk];
unsigned i;
/* clear for security and sanity on each use */
memset(rcd->rcvegrbuf[chunk], 0, size);
for (i = 0; e < egrcnt && i < egrperchunk; e++, i++) {
dd->f_put_tid(dd, e + egroff +
(u64 __iomem *)