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Star64_linux/drivers/infiniband/sw/rdmavt
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Parav Pandit 683a9c7ed8 RDMA: Fix software RDMA drivers for dma mapping error 
The commit f959dcd6dd ("dma-direct: Fix potential NULL pointer
dereference") made dma_mask as mandetory field to be setup even for
dma_virt_ops based dma devices. The commit in the fixes tag omitted
setting up the dma_mask on virtual devices triggering the below trace when
they were combined during the merge window.

Fix it by setting empty DMA MASK for software based RDMA devices.

  WARNING: CPU: 1 PID: 8488 at kernel/dma/mapping.c:149 dma_map_page_attrs+0x493/0x700
  CPU: 1 PID: 8488 Comm: syz-executor144 Not tainted 5.9.0-syzkaller #0
  Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
  RIP: 0010:dma_map_page_attrs+0x493/0x700 kernel/dma/mapping.c:149
  Trace:
   dma_map_single_attrs include/linux/dma-mapping.h:279 [inline]
   ib_dma_map_single include/rdma/ib_verbs.h:3967 [inline]
   ib_mad_post_receive_mads+0x23f/0xd60 drivers/infiniband/core/mad.c:2715
   ib_mad_port_start drivers/infiniband/core/mad.c:2862 [inline]
   ib_mad_port_open drivers/infiniband/core/mad.c:3016 [inline]
   ib_mad_init_device+0x72b/0x1400 drivers/infiniband/core/mad.c:3092
   add_client_context+0x405/0x5e0 drivers/infiniband/core/device.c:680
   enable_device_and_get+0x1d5/0x3c0 drivers/infiniband/core/device.c:1301
   ib_register_device drivers/infiniband/core/device.c:1376 [inline]
   ib_register_device+0x7a7/0xa40 drivers/infiniband/core/device.c:1335
   rxe_register_device+0x46d/0x570 drivers/infiniband/sw/rxe/rxe_verbs.c:1182
   rxe_add+0x12fe/0x16d0 drivers/infiniband/sw/rxe/rxe.c:247
   rxe_net_add+0x8c/0xe0 drivers/infiniband/sw/rxe/rxe_net.c:507
   rxe_newlink drivers/infiniband/sw/rxe/rxe.c:269 [inline]
   rxe_newlink+0xb7/0xe0 drivers/infiniband/sw/rxe/rxe.c:250
   nldev_newlink+0x30e/0x540 drivers/infiniband/core/nldev.c:1555
   rdma_nl_rcv_msg+0x367/0x690 drivers/infiniband/core/netlink.c:195
   rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline]
   rdma_nl_rcv+0x2f2/0x440 drivers/infiniband/core/netlink.c:259
   netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
   netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330
   netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919
   sock_sendmsg_nosec net/socket.c:651 [inline]
   sock_sendmsg+0xcf/0x120 net/socket.c:671
   ____sys_sendmsg+0x6e8/0x810 net/socket.c:2353
   ___sys_sendmsg+0xf3/0x170 net/socket.c:2407
   __sys_sendmsg+0xe5/0x1b0 net/socket.c:2440
   do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
   entry_SYSCALL_64_after_hwframe+0x44/0xa9
  RIP: 0033:0x443699

Link: https://lore.kernel.org/r/20201030093803.278830-1-parav@nvidia.com
Reported-by: syzbot+34dc2fea3478e659af01@syzkaller.appspotmail.com
Fixes: e0477b34d9 ("RDMA: Explicitly pass in the dma_device to ib_register_device")
Signed-off-by: Parav Pandit <parav@nvidia.com>
Tested-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
Tested-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Zhu Yanjun <yanjunz@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2020-11-02 15:14:56 -04:00
..
ah.c RDMA: Restore ability to fail on AH destroy 2020-09-09 13:57:22 -03:00
ah.h RDMA: Restore ability to fail on AH destroy 2020-09-09 13:57:22 -03:00
cq.c RDMA: Allow fail of destroy CQ 2020-09-09 14:14:29 -03:00
cq.h RDMA: Allow fail of destroy CQ 2020-09-09 14:14:29 -03:00
Kconfig treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
mad.c RDMA: Mark if destroy address handle is in a sleepable context 2018-12-19 16:28:03 -07:00
mad.h
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mcast.c infiniband: fix sw/rdmavt/* kernel-doc notation 2018-01-10 22:00:35 -07:00
mcast.h
mmap.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
mmap.h IB: Pass only ib_udata in function prototypes 2019-04-01 15:00:47 -03:00
mr.c percpu_ref: reduce memory footprint of percpu_ref in fast path 2020-10-06 07:29:36 -06:00
mr.h RDMA: Remove the udata parameter from alloc_mr callback 2020-07-06 19:25:53 -03:00
pd.c RDMA: Restore ability to fail on PD deallocate 2020-09-09 13:57:22 -03:00
pd.h RDMA: Restore ability to fail on PD deallocate 2020-09-09 13:57:22 -03:00
qp.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
qp.h IB/hfi1: Move receive work queue struct into uapi directory 2019-06-28 22:32:16 -03:00
rc.c IB/rdmavt: Fix RQ counting issues causing use of an invalid RWQE 2020-07-29 15:54:36 -03:00
srq.c RDMA: Restore ability to fail on SRQ destroy 2020-09-09 14:14:24 -03:00
srq.h RDMA: Restore ability to fail on SRQ destroy 2020-09-09 14:14:24 -03:00
trace.c
trace.h IB/{rdmavt, hfi1, qib}: Remove get_card_name() downcall 2018-01-05 13:34:55 -05:00
trace_cq.h IB/rdmavt: Add wc_flags and wc_immdata to cq entry trace 2019-01-18 13:48:19 -07:00
trace_mr.h IB/rdmavt: Add trace for map_mr_sg 2019-06-28 22:34:26 -03:00
trace_qp.h IB/rdmavt: Fix ab/ba include issues 2019-04-24 11:31:49 -03:00
trace_rc.h IB/rdmavt: Fix ab/ba include issues 2019-04-24 11:31:49 -03:00
trace_rvt.h
trace_tx.h IB/rdmavt: Fix ab/ba include issues 2019-04-24 11:31:49 -03:00
vt.c RDMA: Fix software RDMA drivers for dma mapping error 2020-11-02 15:14:56 -04:00
vt.h IB/{hfi1, qib, rdmavt}: Put qp in error state when cq is full 2019-06-28 22:34:26 -03:00