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Gerd Rausch 6f38d95f33 net/rds: dma_map_sg is entitled to merge entries 
[ Upstream commit fb4b1373dcab086d0619c29310f0466a0b2ceb8a ]

Function "dma_map_sg" is entitled to merge adjacent entries
and return a value smaller than what was passed as "nents".

Subsequently "ib_map_mr_sg" needs to work with this value ("sg_dma_len")
rather than the original "nents" parameter ("sg_len").

This old RDS bug was exposed and reliably causes kernel panics
(using RDMA operations "rds-stress -D") on x86_64 starting with:
commit c588072bba6b ("iommu/vt-d: Convert intel iommu driver to the iommu ops")

Simply put: Linux 5.11 and later.

Signed-off-by: Gerd Rausch <gerd.rausch@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Link: https://lore.kernel.org/r/60efc69f-1f35-529d-a7ef-da0549cad143@oracle.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-09-03 10:09:28 +02:00
..
af_rds.c
net: pass a sockptr_t into ->setsockopt
2020-07-24 15:41:54 -07:00
bind.c
net/rds: Check laddr_check before calling it
2019-09-27 12:10:55 +02:00
cong.c
net: rds: delete duplicated words
2020-09-18 14:12:43 -07:00
connection.c
RDS tcp loopback connection can hang
2021-06-16 12:01:36 +02:00
ib_cm.c
RDMA: Add rdma_connect_locked()
2020-10-28 09:14:49 -03:00
ib_frmr.c
net/rds: dma_map_sg is entitled to merge entries
2021-09-03 10:09:28 +02:00
ib_mr.h
RDMA/rds: Remove FMR support for memory registration
2020-06-02 20:32:53 -03:00
ib_rdma.c
RDMA/rds: Remove FMR support for memory registration
2020-06-02 20:32:53 -03:00
ib_recv.c
net/rds: suppress page allocation failure error in recv buffer refill
2020-10-09 12:32:03 -07:00
ib_ring.c
…
ib_send.c
net/rds: Handle ODP mr registration/unregistration
2020-01-18 11:48:19 +02:00
ib_stats.c
net/rds: Fix 'ib_evt_handler_call' element in 'rds_ib_stat_names'
2019-09-15 20:56:19 +02:00
ib_sysctl.c
…
ib.c
RDMA: Remove 'max_fmr'
2020-06-02 20:32:54 -03:00
ib.h
RDMA: Lift ibdev_to_node from rds to common code
2021-02-26 10:12:59 +01:00
info.c
rds: fix crash in rds_info_getsockopt()
2020-05-20 14:08:06 -07:00
info.h
…
Kconfig
treewide: replace '---help---' in Kconfig files with 'help'
2020-06-14 01:57:21 +09:00
loop.c
rds: Changing IP address internal representation to struct in6_addr
2018-07-23 21:17:44 -07:00
loop.h
rds: clean up loopback rds_connections on netns deletion
2018-06-27 10:11:03 +09:00
Makefile
RDMA/rds: Remove FMR support for memory registration
2020-06-02 20:32:53 -03:00
message.c
net/rds: Fix a use after free in rds_message_map_pages
2021-04-14 08:42:09 +02:00
page.c
…
rdma_transport.c
net: rds: add service level support in rds-info
2019-08-24 16:55:25 -07:00
rdma_transport.h
net: rds: rdma_transport.h: delete duplicated word
2020-07-19 18:14:51 -07:00
rdma.c
net/rds: restrict iovecs length for RDS_CMSG_RDMA_ARGS
2021-02-17 11:02:30 +01:00
rds_single_path.h
…
rds.h
net: pass a sockptr_t into ->setsockopt
2020-07-24 15:41:54 -07:00
recv.c
net: rds: fix memory leak in rds_recvmsg
2021-06-23 14:42:42 +02:00
send.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
stats.c
rds: check for excessive looping in rds_send_xmit
2019-08-15 12:04:24 -07:00
sysctl.c
…
tcp_connect.c
net: add sock_no_linger
2020-05-28 11:11:44 -07:00
tcp_listen.c
RDS tcp loopback connection can hang
2021-06-16 12:01:36 +02:00
tcp_recv.c
rds: Changing IP address internal representation to struct in6_addr
2018-07-23 21:17:44 -07:00
tcp_send.c
tcp: add tcp_sock_set_cork
2020-05-28 11:11:45 -07:00
tcp_stats.c
…
tcp.c
RDS tcp loopback connection can hang
2021-06-16 12:01:36 +02:00
tcp.h
RDS tcp loopback connection can hang
2021-06-16 12:01:36 +02:00
threads.c
rds: make v3.1 as compat version
2019-02-04 14:59:11 -08:00
transport.c
rds: transport module should be auto loaded when transport is set
2020-06-25 16:26:25 -07:00