IB/core: Fix deadlock on uverbs modify_qp error flow

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commit 0fb8bcf022 upstream.

The deadlock occurs in __uverbs_modify_qp: we take a lock (idr_read_qp)
and in case of failure in ib_resolve_eth_l2_attrs we don't release
it (put_qp_read).  Fix that.

Fixes: ed4c54e5b4 ("IB/core: Resolve Ethernet L2 addresses when modifying QP")
Signed-off-by: Moshe Lazer <moshel@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

...

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Moshe Lazer 2015-02-05 13:53:52 +02:00 • committed by Luis Henriques

parent b4fad46ea5

commit 04d384f9b0

1 changed files with 5 additions and 4 deletions

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drivers/infiniband/core/uverbs_cmd.c

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