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dd9a403495
linux/drivers/infiniband/hw
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Valentine Fatiev dd9a403495 IB/mlx5: Unmap DMA addr from HCA before IOMMU 
The function that puts back the MR in cache also removes the DMA address
from the HCA. Therefore we need to call this function before we remove
the DMA mapping from MMU. Otherwise the HCA may access a memory that
is no longer DMA mapped.

Call trace:
NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0.
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.19.0-rc6+ #4
Hardware name: HP ProLiant DL360p Gen8, BIOS P71 08/20/2012
RIP: 0010:intel_idle+0x73/0x120
Code: 80 5c 01 00 0f ae 38 0f ae f0 31 d2 65 48 8b 04 25 80 5c 01 00 48 89 d1 0f 60 02
RSP: 0018:ffffffff9a403e38 EFLAGS: 00000046
RAX: 0000000000000030 RBX: 0000000000000005 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff9a5790c0 RDI: 0000000000000000
RBP: 0000000000000030 R08: 0000000000000000 R09: 0000000000007cf9
R10: 000000000000030a R11: 0000000000000018 R12: 0000000000000000
R13: ffffffff9a5792b8 R14: ffffffff9a5790c0 R15: 0000002b48471e4d
FS:  0000000000000000(0000) GS:ffff9c6caf400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5737185000 CR3: 0000000590c0a002 CR4: 00000000000606f0
Call Trace:
 cpuidle_enter_state+0x7e/0x2e0
 do_idle+0x1ed/0x290
 cpu_startup_entry+0x6f/0x80
 start_kernel+0x524/0x544
 ? set_init_arg+0x55/0x55
 secondary_startup_64+0xa4/0xb0
DMAR: DRHD: handling fault status reg 2
DMAR: [DMA Read] Request device [04:00.0] fault addr b34d2000 [fault reason 06] PTE Read access is not set
DMAR: [DMA Read] Request device [01:00.2] fault addr bff8b000 [fault reason 06] PTE Read access is not set

Fixes: f3f134f526 ("RDMA/mlx5: Fix crash while accessing garbage pointer and freed memory")
Signed-off-by: Valentine Fatiev <valentinef@mellanox.com>
Reviewed-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2018-10-10 14:52:43 -04:00
..
bnxt_re RDMA/bnxt_re: Fix system crash during RDMA resource initialization 2018-09-24 09:24:16 -06:00
cxgb3 RDMA/providers: Remove pointless functions 2018-07-30 20:31:54 -06:00
cxgb4 iw_cxgb4: only allow 1 flush on user qps 2018-09-04 15:07:56 -06:00
hfi1 IB/hfi1: Fix destroy_qp hang after a link down 2018-09-20 19:24:51 -06:00
hns Merge branch 'linus/master' into rdma.git for-next 2018-08-16 14:21:29 -06:00
i40iw RDMA/providers: Remove pointless functions 2018-07-30 20:31:54 -06:00
mlx4 RDMA/mlx4: Ensure that maximal send/receive SGE less than supported by HW 2018-09-06 13:16:12 -06:00
mlx5 IB/mlx5: Unmap DMA addr from HCA before IOMMU 2018-10-10 14:52:43 -04:00
mthca RDMA/providers: Fix return value from create_srq callbacks 2018-07-30 20:29:45 -06:00
nes RDMA/providers: Remove pointless functions 2018-07-30 20:31:54 -06:00
ocrdma RDMA/providers: Remove pointless functions 2018-07-30 20:31:54 -06:00
qedr Linux 4.18 2018-08-16 13:12:00 -06:00
qib RDMA: Constify the argument of the work request conversion functions 2018-07-30 20:00:20 -06:00
usnic RDMA, core and ULPs: Declare ib_post_send() and ib_post_recv() arguments const 2018-07-30 20:09:34 -06:00
vmw_pvrdma RDMA/providers: Remove pointless functions 2018-07-30 20:31:54 -06:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00