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OpenCloudOS-Kernel/drivers/infiniband/core
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Leon Romanovsky e8980d67d6 RDMA/ucma: Ensure that CM_ID exists prior to access it 
Prior to access UCMA commands, the context should be initialized
and connected to CM_ID with ucma_create_id(). In case user skips
this step, he can provide non-valid ctx without CM_ID and cause
to multiple NULL dereferences.

Also there are situations where the create_id can be raced with
other user access, ensure that the context is only shared to
other threads once it is fully initialized to avoid the races.

[  109.088108] BUG: unable to handle kernel NULL pointer dereference at 0000000000000020
[  109.090315] IP: ucma_connect+0x138/0x1d0
[  109.092595] PGD 80000001dc02d067 P4D 80000001dc02d067 PUD 1da9ef067 PMD 0
[  109.095384] Oops: 0000 [#1] SMP KASAN PTI
[  109.097834] CPU: 0 PID: 663 Comm: uclose Tainted: G    B 4.16.0-rc1-00062-g2975d5de6428 #45
[  109.100816] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.11.0-0-g63451fca13-prebuilt.qemu-project.org 04/01/2014
[  109.105943] RIP: 0010:ucma_connect+0x138/0x1d0
[  109.108850] RSP: 0018:ffff8801c8567a80 EFLAGS: 00010246
[  109.111484] RAX: 0000000000000000 RBX: 1ffff100390acf50 RCX: ffffffff9d7812e2
[  109.114496] RDX: 1ffffffff3f507a5 RSI: 0000000000000297 RDI: 0000000000000297
[  109.117490] RBP: ffff8801daa15600 R08: 0000000000000000 R09: ffffed00390aceeb
[  109.120429] R10: 0000000000000001 R11: ffffed00390aceea R12: 0000000000000000
[  109.123318] R13: 0000000000000120 R14: ffff8801de6459c0 R15: 0000000000000118
[  109.126221] FS:  00007fabb68d6700(0000) GS:ffff8801e5c00000(0000) knlGS:0000000000000000
[  109.129468] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  109.132523] CR2: 0000000000000020 CR3: 00000001d45d8003 CR4: 00000000003606b0
[  109.135573] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  109.138716] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  109.142057] Call Trace:
[  109.144160]  ? ucma_listen+0x110/0x110
[  109.146386]  ? wake_up_q+0x59/0x90
[  109.148853]  ? futex_wake+0x10b/0x2a0
[  109.151297]  ? save_stack+0x89/0xb0
[  109.153489]  ? _copy_from_user+0x5e/0x90
[  109.155500]  ucma_write+0x174/0x1f0
[  109.157933]  ? ucma_resolve_route+0xf0/0xf0
[  109.160389]  ? __mod_node_page_state+0x1d/0x80
[  109.162706]  __vfs_write+0xc4/0x350
[  109.164911]  ? kernel_read+0xa0/0xa0
[  109.167121]  ? path_openat+0x1b10/0x1b10
[  109.169355]  ? fsnotify+0x899/0x8f0
[  109.171567]  ? fsnotify_unmount_inodes+0x170/0x170
[  109.174145]  ? __fget+0xa8/0xf0
[  109.177110]  vfs_write+0xf7/0x280
[  109.179532]  SyS_write+0xa1/0x120
[  109.181885]  ? SyS_read+0x120/0x120
[  109.184482]  ? compat_start_thread+0x60/0x60
[  109.187124]  ? SyS_read+0x120/0x120
[  109.189548]  do_syscall_64+0xeb/0x250
[  109.192178]  entry_SYSCALL_64_after_hwframe+0x21/0x86
[  109.194725] RIP: 0033:0x7fabb61ebe99
[  109.197040] RSP: 002b:00007fabb68d5e98 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[  109.200294] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fabb61ebe99
[  109.203399] RDX: 0000000000000120 RSI: 00000000200001c0 RDI: 0000000000000004
[  109.206548] RBP: 00007fabb68d5ec0 R08: 0000000000000000 R09: 0000000000000000
[  109.209902] R10: 0000000000000000 R11: 0000000000000202 R12: 00007fabb68d5fc0
[  109.213327] R13: 0000000000000000 R14: 00007fff40ab2430 R15: 00007fabb68d69c0
[  109.216613] Code: 88 44 24 2c 0f b6 84 24 6e 01 00 00 88 44 24 2d 0f
b6 84 24 69 01 00 00 88 44 24 2e 8b 44 24 60 89 44 24 30 e8 da f6 06 ff
31 c0 <66> 41 83 7c 24 20 1b 75 04 8b 44 24 64 48 8d 74 24 20 4c 89 e7
[  109.223602] RIP: ucma_connect+0x138/0x1d0 RSP: ffff8801c8567a80
[  109.226256] CR2: 0000000000000020

Fixes: 7521663857 ("RDMA/cma: Export rdma cm interface to userspace")
Reported-by: <syzbot+36712f50b0552615bf59@syzkaller.appspotmail.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
 		2018-03-20 11:07:21 -06:00
..
Makefile RDMA/restrack: Add general infrastructure to track RDMA resources 2018-01-29 20:21:39 -07:00
addr.c IB/core : Add null pointer check in addr_resolve 2018-02-28 12:10:33 -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/ucma: Fix access to non-initialized CM_ID object 2018-03-14 16:22:55 -04:00
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: Reduce poll batch for direct cq polling 2018-03-06 20:08:39 -07:00
device.c IB/core: Fix missing RDMA cgroups release in case of failure to register device 2018-02-28 12:10:32 -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
…
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/core: Fix possible crash to access NULL netdev 2018-03-07 15:15:40 -05:00
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 RDMA/ucma: Ensure that CM_ID exists prior to access it 2018-03-20 11:07:21 -06:00
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