net/smc: Fix af_ops of child socket pointing to released memory

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commit 49b7d376ab upstream.

Child sockets may inherit the af_ops from the parent listen socket.
When the listen socket is released then the af_ops of the child socket
points to released memory.
Solve that by restoring the original af_ops for child sockets which
inherited the parent af_ops. And clear any inherited user_data of the
parent socket.

Fixes: 8270d9c210 ("net/smc: Limit backlog connections")
Reviewed-by: Wenjia Zhang <wenjia@linux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Reviewed-by: D. Wythe <alibuda@linux.alibaba.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Karsten Graul 2022-04-08 17:10:35 +02:00 • committed by Greg Kroah-Hartman

parent 5cedfe8aaf

commit 5e71985e85

1 changed files with 12 additions and 2 deletions

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net/smc/af_smc.c

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