RDMA/irdma: Fix kernel stack leak in irdma_create_user_ah()

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[ Upstream commit 74586c6da9 ]

struct irdma_create_ah_resp {  // 8 bytes, no padding
    __u32 ah_id;               // offset 0 - SET (uresp.ah_id = ah->sc_ah.ah_info.ah_idx)
    __u8  rsvd[4];             // offset 4 - NEVER SET <- LEAK
};

rsvd[4]: 4 bytes of stack memory leaked unconditionally. Only ah_id is assigned before ib_respond_udata().

The reserved members of the structure were not zeroed.

Cc: stable@vger.kernel.org
Fixes: b48c24c2d7 ("RDMA/irdma: Implement device supported verb APIs")
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://patch.msgid.link/3-v1-83e918d69e73+a9-rdma_udata_rc_jgg@nvidia.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
[ adapted fix to combined irdma_create_ah() ]
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Jason Gunthorpe 2026-03-09 09:27:39 -04:00 • committed by Greg Kroah-Hartman

parent b2e9626a9d

commit 1f70df004f

1 changed files with 1 additions and 1 deletions

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drivers/infiniband/hw/irdma/verbs.c

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