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linux/net/smc
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Wen Gu 32ac8c9291 net/smc: Stop the CLC flow if no link to map buffers on 
[ Upstream commit e738455b2c ]

There might be a potential race between SMC-R buffer map and
link group termination.

smc_smcr_terminate_all()     | smc_connect_rdma()
--------------------------------------------------------------
                             | smc_conn_create()
for links in smcibdev        |
        schedule links down  |
                             | smc_buf_create()
                             |  \- smcr_buf_map_usable_links()
                             |      \- no usable links found,
                             |         (rmb->mr = NULL)
                             |
                             | smc_clc_send_confirm()
                             |  \- access conn->rmb_desc->mr[]->rkey
                             |     (panic)

During reboot and IB device module remove, all links will be set
down and no usable links remain in link groups. In such situation
smcr_buf_map_usable_links() should return an error and stop the
CLC flow accessing to uninitialized mr.

Fixes: b9247544c1 ("net/smc: convert static link ID instances to support multiple links")
Signed-off-by: Wen Gu <guwen@linux.alibaba.com>
Link: https://lore.kernel.org/r/1663656189-32090-1-git-send-email-guwen@linux.alibaba.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-09-28 11:32:20 +02:00
..
af_smc.c
net/smc: Remove redundant refcount increase
2022-09-08 11:24:00 +02:00
Kconfig
treewide: replace '---help---' in Kconfig files with 'help'
2020-06-14 01:57:21 +09:00
Makefile
net/smc: fix compile warning for smc_sysctl
2022-03-07 11:59:17 +00:00
smc_cdc.c
net/smc: fixes for converting from "struct smc_cdc_tx_pend **" to "struct smc_wr_tx_pend_priv *"
2022-05-28 12:36:26 +01:00
smc_cdc.h
net/smc: fix kernel panic caused by race of smc_sock
2021-12-28 12:42:45 +00:00
smc_clc.c
net/smc: use memcpy instead of snprintf to avoid out of bounds read
2022-04-11 18:28:02 -07:00
smc_clc.h
net/smc: add v2 format of CLC decline message
2021-10-16 14:58:13 +01:00
smc_close.c
net/smc: Fix slab-out-of-bounds issue in fallback
2022-04-25 11:03:48 -07:00
smc_close.h
net/smc: remove close abort worker
2019-10-22 11:23:44 -07:00
smc_core.c
net/smc: Stop the CLC flow if no link to map buffers on
2022-09-28 11:32:20 +02:00
smc_core.h
net/smc: Fix possible access to freed memory in link clear
2022-09-15 10:47:17 +02:00
smc_diag.c
Partially revert "net/smc: Add netlink net namespace support"
2022-02-02 07:42:41 -08:00
smc_ib.c
net/smc: send cdc msg inline if qp has sufficient inline space
2022-05-17 17:34:12 -07:00
smc_ib.h
net/smc: Introduce net namespace support for linkgroup
2022-01-02 12:07:39 +00:00
smc_ism.c
net: Don't include filter.h from net/sock.h
2021-12-29 08:48:14 -08:00
smc_ism.h
net/smc: keep static copy of system EID
2021-09-14 12:49:10 +01:00
smc_llc.c
tcp: Fix data-races around keepalive sysctl knobs.
2022-07-18 12:21:54 +01:00
smc_llc.h
net/smc: extend LLC layer for SMC-Rv2
2021-10-16 14:58:13 +01:00
smc_netlink.c
net/smc: Add global configure for handshake limitation by netlink
2022-02-11 11:14:58 +00:00
smc_netlink.h
net/smc: add support for user defined EIDs
2021-09-14 12:49:10 +01:00
smc_netns.h
net/smc: introduce list of pnetids for Ethernet devices
2020-09-28 15:19:03 -07:00
smc_pnet.c
net/smc: Fix NULL pointer dereference in smc_pnet_find_ib()
2022-04-11 18:28:03 -07:00
smc_pnet.h
net/smc: Use a mutex for locking "struct smc_pnettable"
2022-02-24 09:09:33 -08:00
smc_rx.c
net/smc: non blocking recvmsg() return -EAGAIN when no data and signal_pending
2022-05-12 10:01:36 -07:00
smc_rx.h
smc: add support for splice()
2018-05-04 11:45:06 -04:00
smc_stats.c
net/smc: Fix ENODATA tests in smc_nl_get_fback_stats()
2021-06-21 12:16:58 -07:00
smc_stats.h
net/smc: Make SMC statistics network namespace aware
2021-06-16 12:54:02 -07:00
smc_sysctl.c
net/smc: fix a memory leak in smc_sysctl_net_exit()
2022-03-26 14:17:01 -07:00
smc_sysctl.h
net/smc: fix -Wmissing-prototypes warning when CONFIG_SYSCTL not set
2022-03-09 20:02:35 -08:00
smc_tracepoint.c
net/smc: Introduce tracepoint for smcr link down
2021-11-01 13:39:14 +00:00
smc_tracepoint.h
net/smc: Add net namespace for tracepoints
2022-01-02 12:07:39 +00:00
smc_tx.c
net/smc: rdma write inline if qp has sufficient inline space
2022-05-17 17:34:12 -07:00
smc_tx.h
net/smc: Cork when sendpage with MSG_SENDPAGE_NOTLAST flag
2022-01-31 15:08:20 +00:00
smc_wr.c
net/smc: Fix possible access to freed memory in link clear
2022-09-15 10:47:17 +02:00
smc_wr.h
net/smc: Fix possible access to freed memory in link clear
2022-09-15 10:47:17 +02:00
smc.h
net/smc: Only save the original clcsock callback functions
2022-04-25 11:03:48 -07:00