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alistair23-linux/drivers/infiniband/core
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Leon Romanovsky f45765872e RDMA/uverbs: Fix kernel panic while using XRC_TGT QP type 
Attempt to modify XRC_TGT QP type from the user space (ibv_xsrq_pingpong
invocation) will trigger the following kernel panic. It is caused by the
fact that such QPs missed uobject initialization.

[   17.408845] BUG: unable to handle kernel NULL pointer dereference at 0000000000000048
[   17.412645] IP: rdma_lookup_put_uobject+0x9/0x50
[   17.416567] PGD 0 P4D 0
[   17.419262] Oops: 0000 [#1] SMP PTI
[   17.422915] CPU: 0 PID: 455 Comm: ibv_xsrq_pingpo Not tainted 4.16.0-rc1+ #86
[   17.424765] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.7.5-0-ge51488c-20140602_164612-nilsson.home.kraxel.org 04/01/2014
[   17.427399] RIP: 0010:rdma_lookup_put_uobject+0x9/0x50
[   17.428445] RSP: 0018:ffffb8c7401e7c90 EFLAGS: 00010246
[   17.429543] RAX: 0000000000000000 RBX: ffffb8c7401e7cf8 RCX: 0000000000000000
[   17.432426] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000000
[   17.437448] RBP: 0000000000000000 R08: 00000000000218f0 R09: ffffffff8ebc4cac
[   17.440223] R10: fffff6038052cd80 R11: ffff967694b36400 R12: ffff96769391f800
[   17.442184] R13: ffffb8c7401e7cd8 R14: 0000000000000000 R15: ffff967699f60000
[   17.443971] FS:  00007fc29207d700(0000) GS:ffff96769fc00000(0000) knlGS:0000000000000000
[   17.446623] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   17.448059] CR2: 0000000000000048 CR3: 000000001397a000 CR4: 00000000000006b0
[   17.449677] Call Trace:
[   17.450247]  modify_qp.isra.20+0x219/0x2f0
[   17.451151]  ib_uverbs_modify_qp+0x90/0xe0
[   17.452126]  ib_uverbs_write+0x1d2/0x3c0
[   17.453897]  ? __handle_mm_fault+0x93c/0xe40
[   17.454938]  __vfs_write+0x36/0x180
[   17.455875]  vfs_write+0xad/0x1e0
[   17.456766]  SyS_write+0x52/0xc0
[   17.457632]  do_syscall_64+0x75/0x180
[   17.458631]  entry_SYSCALL_64_after_hwframe+0x21/0x86
[   17.460004] RIP: 0033:0x7fc29198f5a0
[   17.460982] RSP: 002b:00007ffccc71f018 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   17.463043] RAX: ffffffffffffffda RBX: 0000000000000078 RCX: 00007fc29198f5a0
[   17.464581] RDX: 0000000000000078 RSI: 00007ffccc71f050 RDI: 0000000000000003
[   17.466148] RBP: 0000000000000000 R08: 0000000000000078 R09: 00007ffccc71f050
[   17.467750] R10: 000055b6cf87c248 R11: 0000000000000246 R12: 00007ffccc71f300
[   17.469541] R13: 000055b6cf8733a0 R14: 0000000000000000 R15: 0000000000000000
[   17.471151] Code: 00 00 0f 1f 44 00 00 48 8b 47 48 48 8b 00 48 8b 40 10 e9 0b 8b 68 00 90 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 53 89 f5 <48> 8b 47 48 48 89 fb 40 0f b6 f6 48 8b 00 48 8b 40 20 e8 e0 8a
[   17.475185] RIP: rdma_lookup_put_uobject+0x9/0x50 RSP: ffffb8c7401e7c90
[   17.476841] CR2: 0000000000000048
[   17.477764] ---[ end trace 1dbcc5354071a712 ]---
[   17.478880] Kernel panic - not syncing: Fatal exception
[   17.480277] Kernel Offset: 0xd000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)

Fixes: 2f08ee363f ("RDMA/restrack: don't use uaccess_kernel()")
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2018-02-21 13:52:19 -05:00
..
addr.c RDMA/core: Avoid copying ifindex twice 2017-12-18 15:37:10 -07:00
agent.c IB/core: Rename ib_destroy_ah to rdma_destroy_ah 2017-05-01 14:32:43 -04:00
agent.h IB/mad: Add final OPA MAD processing 2015-06-12 14:49:18 -04:00
cache.c {net, IB}/mlx5: Manage port association for multiport RoCE 2018-01-08 11:42:22 -07:00
cgroup.c IB/core: added support to use rdma cgroup controller 2017-01-10 11:14:27 -05:00
cm.c RDMA/cm: Fix access to uninitialized variable 2018-01-28 14:07:16 -07:00
cm_msgs.h IB/core: Fix unaligned accesses 2015-05-05 13:21:27 -04:00
cma.c RDMA/cma: Use existing netif_is_bond_master function 2018-01-28 14:07:16 -07:00
cma_configfs.c IB/cma: use strlcpy() instead of strncpy() 2018-01-15 15:33:21 -07:00
core_priv.h RDMA/restrack: don't use uaccess_kernel() 2018-02-16 10:18:11 -07:00
cq.c RDMA/core: Add resource tracking for create and destroy CQs 2018-01-29 20:21:40 -07:00
device.c RDMA/restrack: Add general infrastructure to track RDMA resources 2018-01-29 20:21:39 -07:00
fmr_pool.c infiniband: fix core/fmr_pool.c kernel-doc notation 2018-01-10 22:00:34 -07:00
iwcm.c RDMA/netlink: Fix general protection fault 2017-12-07 15:28:07 -05:00
iwcm.h iw_cm: free cm_id resources on the last deref 2016-08-02 13:15:18 -04:00
iwpm_msg.c RDMA/iwpm: Properly mark end of NL messages 2017-09-29 11:32:42 -04:00
iwpm_util.c RDMA/iwpm: Fix uninitialized error code in iwpm_send_mapinfo() 2017-12-13 10:55:49 -07:00
iwpm_util.h iwpm: crash fix for large connections test 2016-03-16 13:48:32 -04:00
mad.c drivers: infiniband: remove duplicate includes 2017-12-22 09:39:35 -07:00
mad_priv.h IB/mad: use CQ abstraction 2016-01-19 15:25:45 -05:00
mad_rmpp.c IB/mad: Change slid in RMPP recv from 16 to 32 bits 2017-08-08 14:47:18 -04:00
mad_rmpp.h
Makefile RDMA/restrack: Add general infrastructure to track RDMA resources 2018-01-29 20:21:39 -07:00
mr_pool.c IB/core: add a simple MR pool 2016-05-13 13:37:18 -04:00
multicast.c IB/core: Define 'ib' and 'roce' rdma_ah_attr types 2017-05-01 14:32:43 -04:00
netlink.c RDMA/netlink: Simplify code of autoload modules 2018-01-02 13:36:57 -07:00
nldev.c RDMA/nldev: missing error code in nldev_res_get_doit() 2018-02-01 15:24:32 -07:00
opa_smi.h IB: Add rdma_cap_ib_switch helper and use where appropriate 2015-07-14 13:20:08 -04:00
packer.c IB/core: trivial prink cleanup. 2016-03-03 10:20:25 -05:00
rdma_core.c IB/uverbs: Fix unbalanced unlock on error path for rdma_explicit_destroy 2018-02-15 15:31:26 -07:00
rdma_core.h IB/core: Add new ioctl interface 2017-08-31 08:35:09 -04:00
restrack.c RDMA/restrack: don't use uaccess_kernel() 2018-02-16 10:18:11 -07:00
roce_gid_mgmt.c {net, IB}/mlx5: Manage port association for multiport RoCE 2018-01-08 11:42:22 -07:00
rw.c IB/core: remove redundant check on prot_sg_cnt 2017-10-10 10:49:45 -04:00
sa.h
sa_query.c IB/SA: Check dlid before SA agent queries for ClassPortInfo 2017-12-22 13:33:30 -07:00
security.c Merge branch 'from-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git 2017-12-27 21:50:46 -07:00
smi.c IB: Add rdma_cap_ib_switch helper and use where appropriate 2015-07-14 13:20:08 -04:00
smi.h IB: Add rdma_cap_ib_switch helper and use where appropriate 2015-07-14 13:20:08 -04:00
sysfs.c IB/core: Fix two kernel warnings triggered by rxe registration 2018-01-03 17:26:59 -07:00
ucm.c vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
ucma.c vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
ud_header.c IB/core: trivial prink cleanup. 2016-03-03 10:20:25 -05:00
umem.c IB/umem: Fix use of npages/nmap fields 2017-12-18 15:37:06 -07:00
umem_odp.c RDMA/umem: Avoid partial declaration of non-static function 2017-11-10 13:02:12 -05:00
user_mad.c vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
uverbs.h IB/uverbs: Allow CQ moderation with modify CQ 2017-11-13 16:59:22 -05:00
uverbs_cmd.c RDMA/uverbs: Fix kernel panic while using XRC_TGT QP type 2018-02-21 13:52:19 -05:00
uverbs_ioctl.c IB/uverbs: Fix possible oops with duplicate ioctl attributes 2018-02-15 14:59:46 -07:00
uverbs_ioctl_merge.c IB/uverbs: Fix method merging in uverbs_ioctl_merge 2018-02-15 14:59:45 -07:00
uverbs_main.c RDMA/uverbs: Protect from command mask overflow 2018-02-15 15:31:26 -07:00
uverbs_marshall.c IB/core: Convert OPA AH to IB for Extended LIDs only 2017-11-13 15:53:57 -05:00
uverbs_std_types.c IB/uverbs: Use u64_to_user_ptr() not a union 2018-02-15 14:59:45 -07:00
verbs.c RDMA/restrack: don't use uaccess_kernel() 2018-02-16 10:18:11 -07:00