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IB/uverbs: Check comp_mask in destroy_flow

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Just like the check added to create_flow in 22878dbc91 ("IB/core:
Better checking of userspace values for receive flow steering"),
comp_mask must be checked in destroy_flow too.

Since only empty comp_mask is currently supported, any other value
must be rejected.

This check was silently added in a previous patch[1] to move comp_mask
in extended command header, part of previous patchset[2] against
create/destroy_flow uverbs. The idea of moving comp_mask to the header
was discarded for the final patchset[3].

Unfortunately the check added in destroy_flow uverb was not integrated
in the final patchset.

[1] http://marc.info/?i=40175eda10d670d098204da6aa4c327a0171ae5f.1381510045.git.ydroneaud@opteya.com
[2] http://marc.info/?i=cover.1381510045.git.ydroneaud@opteya.com
[3] http://marc.info/?i=cover.1383773832.git.ydroneaud@opteya.com

Cc: Matan Barak <matanb@mellanox.com>
Link: http://marc.info/?i=cover.1386798254.git.ydroneaud@opteya.com>
Signed-off-by: Yann Droneaud <ydroneaud@opteya.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Yann Droneaud 2013-12-11 23:01:48 +01:00 committed by Roland Dreier
parent 7efb1b19b3
commit 2782c2d302
1 changed files with 3 additions and 0 deletions
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3
drivers/infiniband/core/uverbs_cmd.c
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@ -2795,6 +2795,9 @@ int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file,
if (ret)
return ret;
if (cmd.comp_mask)
return -EINVAL;
uobj = idr_write_uobj(&ib_uverbs_rule_idr, cmd.flow_handle,
file->ucontext);
if (!uobj)