Public bug reported:
Ib_uverbs failed to create Receive Work Queue indirection table due to unclean
cmd buffer.
This issue reproduces when the requested table size is 1 wq handler and it's
fixed in rdma-core v23
The following rdma-core patch fixes this issue:
commit 34225464c1d165f63ffd462364810cc9f374109d
Author: Mark Bloch <ma...@mellanox.com>
Date: Wed Feb 20 20:00:45 2019 +0000
verbs: clear cmd buffer when creating indirection table
Make sure we clear the cmd buffer, not doing so will make the kernel to
fail the command.
Fixes: 75c65bbcadcd ("verbs: Consolidate duplicate code in
create_rwq_ind_table")
Signed-off-by: Mark Bloch <ma...@mellanox.com>
Signed-off-by: Yishai Hadas <yish...@mellanox.com>
diff --git a/libibverbs/cmd.c b/libibverbs/cmd.c
index 34c71e56..5817c598 100644
--- a/libibverbs/cmd.c
+++ b/libibverbs/cmd.c
@@ -1854,6 +1854,7 @@ int ibv_cmd_create_rwq_ind_table(struct ibv_context
*context,
cmd_size = sizeof(*cmd) + num_tbl_entries * sizeof(cmd->wq_handles[0]);
cmd_size = (cmd_size + 7) / 8 * 8;
cmd = alloca(cmd_size);
+ memset(cmd, 0, cmd_size);
for (i = 0; i < num_tbl_entries; i++)
cmd->wq_handles[i] = init_attr->ind_tbl[i]->handle;
ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: libibverbs-dev 22.1-1
ProcVersionSignature: Ubuntu 5.0.0-13.14-generic 5.0.6
Uname: Linux 5.0.0-13-generic x86_64
ApportVersion: 2.20.10-0ubuntu27
Architecture: amd64
Date: Mon May 6 10:44:06 2019
ProcEnviron:
LANGUAGE=en_US:
TERM=xterm
PATH=(custom, no user)
LANG=en_US
SHELL=/bin/bash
SourcePackage: rdma-core
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: rdma-core (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug disco
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https://bugs.launchpad.net/bugs/1827840
Title:
Failed to create Receive Work Queue indirection table when the number
of work handler equal 1
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