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| author | Wen Gu <guwen@linux.alibaba.com> | 2022-09-20 09:43:09 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-09-28 12:11:53 +0300 |
| commit | db145b8a04fc6d2df78670dd210aacf4f7fedbce (patch) | |
| tree | 6756888c6cc299a2c564d31322d4ad781c01211d /scripts | |
| parent | 5daef0042d2c46da046f93957de43b675cf724fd (diff) | |
| download | linux-db145b8a04fc6d2df78670dd210aacf4f7fedbce.tar.xz | |
net/smc: Stop the CLC flow if no link to map buffers on
[ Upstream commit e738455b2c6dcdab03e45d97de36476f93f557d2 ]
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: b9247544c1bc ("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>
Diffstat (limited to 'scripts')
0 files changed, 0 insertions, 0 deletions