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RDMA/rxe: Prevent faulty rkey generation

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[ Upstream commit 1aefe5c177 ]

If you create MRs more than 0x10000 times after loading the module,
responder starts to reply NAKs for RDMA/Atomic operations because of rkey
violation detected in check_rkey(). The root cause is that rkeys are
incremented each time a new MR is created and the value overflows into the
range reserved for MWs.

This commit also increases the value of RXE_MAX_MW that has been limited
unlike other parameters.

Fixes: 0994a1bcd5 ("RDMA/rxe: Bump up default maximum values used via uverbs")
Link: https://lore.kernel.org/r/20221220080848.253785-2-matsuda-daisuke@fujitsu.com
Signed-off-by: Daisuke Matsuda <matsuda-daisuke@fujitsu.com>
Tested-by: Li Zhijian <lizhijian@fujitsu.com>
Reviewed-by: Li Zhijian <lizhijian@fujitsu.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Daisuke Matsuda
2022-12-20 17:08:48 +09:00
committed by Greg Kroah-Hartman
parent 7ca8aa8354
commit d7c71f93cf
1 changed files with 5 additions and 5 deletions
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10
drivers/infiniband/sw/rxe/rxe_param.h
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@@ -91,11 +91,11 @@ enum rxe_device_param {
RXE_MAX_SRQ = DEFAULT_MAX_VALUE - RXE_MIN_SRQ_INDEX, RXE_MAX_SRQ = DEFAULT_MAX_VALUE - RXE_MIN_SRQ_INDEX,
RXE_MIN_MR_INDEX = 0x00000001, RXE_MIN_MR_INDEX = 0x00000001,
RXE_MAX_MR_INDEX = DEFAULT_MAX_VALUE, RXE_MAX_MR_INDEX = DEFAULT_MAX_VALUE >> 1,
RXE_MAX_MR = DEFAULT_MAX_VALUE - RXE_MIN_MR_INDEX, RXE_MAX_MR = RXE_MAX_MR_INDEX - RXE_MIN_MR_INDEX,
RXE_MIN_MW_INDEX = 0x00010001, RXE_MIN_MW_INDEX = RXE_MAX_MR_INDEX + 1,
RXE_MAX_MW_INDEX = 0x00020000, RXE_MAX_MW_INDEX = DEFAULT_MAX_VALUE,
RXE_MAX_MW = 0x00001000, RXE_MAX_MW = RXE_MAX_MW_INDEX - RXE_MIN_MW_INDEX,
RXE_MAX_PKT_PER_ACK = 64, RXE_MAX_PKT_PER_ACK = 64,