diff options
| author | Bart Van Assche <bvanassche@acm.org> | 2020-02-17 23:57:14 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2020-02-19 23:56:57 +0300 |
| commit | fb3063d31995cc4cf1d47a406bb61d6fb1b1d58d (patch) | |
| tree | 3f346ba09a483a7c779fc67468eb06f73c68dcfa /drivers/infiniband | |
| parent | 0a01623b74d41d91a595cbeb29e1a03648aec087 (diff) | |
| download | linux-fb3063d31995cc4cf1d47a406bb61d6fb1b1d58d.tar.xz | |
RDMA/rxe: Fix configuration of atomic queue pair attributes
From the comment above the definition of the roundup_pow_of_two() macro:
The result is undefined when n == 0.
Hence only pass positive values to roundup_pow_of_two(). This patch fixes
the following UBSAN complaint:
UBSAN: Undefined behaviour in ./include/linux/log2.h:57:13
shift exponent 64 is too large for 64-bit type 'long unsigned int'
Call Trace:
dump_stack+0xa5/0xe6
ubsan_epilogue+0x9/0x26
__ubsan_handle_shift_out_of_bounds.cold+0x4c/0xf9
rxe_qp_from_attr.cold+0x37/0x5d [rdma_rxe]
rxe_modify_qp+0x59/0x70 [rdma_rxe]
_ib_modify_qp+0x5aa/0x7c0 [ib_core]
ib_modify_qp+0x3b/0x50 [ib_core]
cma_modify_qp_rtr+0x234/0x260 [rdma_cm]
__rdma_accept+0x1a7/0x650 [rdma_cm]
nvmet_rdma_cm_handler+0x1286/0x14cd [nvmet_rdma]
cma_cm_event_handler+0x6b/0x330 [rdma_cm]
cma_ib_req_handler+0xe60/0x22d0 [rdma_cm]
cm_process_work+0x30/0x140 [ib_cm]
cm_req_handler+0x11f4/0x1cd0 [ib_cm]
cm_work_handler+0xb8/0x344e [ib_cm]
process_one_work+0x569/0xb60
worker_thread+0x7a/0x5d0
kthread+0x1e6/0x210
ret_from_fork+0x24/0x30
Link: https://lore.kernel.org/r/20200217205714.26937-1-bvanassche@acm.org
Fixes: 8700e3e7c485 ("Soft RoCE driver")
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/sw/rxe/rxe_qp.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/infiniband/sw/rxe/rxe_qp.c b/drivers/infiniband/sw/rxe/rxe_qp.c index ec21f616ac98..6c11c3aeeca6 100644 --- a/drivers/infiniband/sw/rxe/rxe_qp.c +++ b/drivers/infiniband/sw/rxe/rxe_qp.c @@ -590,15 +590,16 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask, int err; if (mask & IB_QP_MAX_QP_RD_ATOMIC) { - int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic); + int max_rd_atomic = attr->max_rd_atomic ? + roundup_pow_of_two(attr->max_rd_atomic) : 0; qp->attr.max_rd_atomic = max_rd_atomic; atomic_set(&qp->req.rd_atomic, max_rd_atomic); } if (mask & IB_QP_MAX_DEST_RD_ATOMIC) { - int max_dest_rd_atomic = - __roundup_pow_of_two(attr->max_dest_rd_atomic); + int max_dest_rd_atomic = attr->max_dest_rd_atomic ? + roundup_pow_of_two(attr->max_dest_rd_atomic) : 0; qp->attr.max_dest_rd_atomic = max_dest_rd_atomic; |