AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/net/sunrpc
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Chuck Lever ca1c671302 xprtrdma: Fix DMA scatter-gather list mapping imbalance 
The @nents value that was passed to ib_dma_map_sg() has to be passed
to the matching ib_dma_unmap_sg() call. If ib_dma_map_sg() choses to
concatenate sg entries, it will return a different nents value than
it was passed.

The bug was exposed by recent changes to the AMD IOMMU driver, which
enabled sg entry concatenation.

Looking all the way back to commit 4143f34e01 ("xprtrdma: Port to
new memory registration API") and reviewing other kernel ULPs, it's
not clear that the frwr_map() logic was ever correct for this case.

Reported-by: Andre Tomt <andre@tomt.net>
Suggested-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: stable@vger.kernel.org
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-02-13 15:35:33 -05:00
..
auth_gss Highlights: 2020-02-07 17:50:21 -08:00
xprtrdma xprtrdma: Fix DMA scatter-gather list mapping imbalance 2020-02-13 15:35:33 -05:00
addr.c SUNRPC: Use kmemdup_nul() in rpc_parse_scope_id() 2020-02-03 16:35:07 -05:00
auth_null.c
auth_unix.c
auth.c SUNRPC: Remove broken gss_mech_list_pseudoflavors() 2020-01-15 10:54:32 -05:00
backchannel_rqst.c SUNRPC: Destroy the back channel when we destroy the host transport 2019-10-30 12:04:35 -04:00
cache.c Highlights: 2020-02-07 17:50:21 -08:00
clnt.c SUNRPC: call_connect_status should handle -EPROTO 2020-01-15 10:54:31 -05:00
debugfs.c NFS client updates for Linux 5.3 2019-07-18 14:32:33 -07:00
Kconfig SUNRPC: Drop redundant CONFIG_ from CONFIG_SUNRPC_DISABLE_INSECURE_ENCTYPES 2019-07-06 14:54:53 -04:00
Makefile
netns.h
rpc_pipe.c kernel/notifier.c: remove blocking_notifier_chain_cond_register() 2019-12-04 19:44:12 -08:00
rpcb_clnt.c
sched.c SUNRPC: Capture signalled RPC tasks 2020-01-15 10:54:31 -05:00
socklib.c
stats.c proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
sunrpc_syms.c
sunrpc.h
svc_xprt.c nfs: fix out-of-date connectathon talk URL 2019-07-03 17:52:09 -04:00
svc.c SUNRPC: Trace gssproxy upcall results 2019-10-30 16:32:07 -04:00
svcauth_unix.c nfs: use time64_t internally 2019-12-18 18:07:32 +01:00
svcauth.c SUNRPC: Trace gssproxy upcall results 2019-10-30 16:32:07 -04:00
svcsock.c
sysctl.c
timer.c
xdr.c SUNRPC: constify copied structure 2020-01-15 10:54:31 -05:00
xprt.c NFSoRDMA Client Updates for Linux 5.5 2019-11-18 10:55:55 +01:00
xprtmultipath.c SUNRPC: Optimise transport balancing code 2019-07-18 14:43:52 -04:00
xprtsock.c This is a relatively quiet cycle for nfsd, mainly various bugfixes. 2019-12-07 16:56:00 -08:00