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a1ae7d0345
linux/drivers/infiniband/core
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Bart Van Assche a1ae7d0345 RDMA/core: Avoid that ib_drain_qp() triggers an out-of-bounds stack access 
This patch fixes the following KASAN complaint:

==================================================================
BUG: KASAN: stack-out-of-bounds in rxe_post_send+0x77d/0x9b0 [rdma_rxe]
Read of size 8 at addr ffff880061aef860 by task 01/1080

CPU: 2 PID: 1080 Comm: 01 Not tainted 4.16.0-rc3-dbg+ #2
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.0.0-prebuilt.qemu-project.org 04/01/2014
Call Trace:
dump_stack+0x85/0xc7
print_address_description+0x65/0x270
kasan_report+0x231/0x350
rxe_post_send+0x77d/0x9b0 [rdma_rxe]
__ib_drain_sq+0x1ad/0x250 [ib_core]
ib_drain_qp+0x9/0x30 [ib_core]
srp_destroy_qp+0x51/0x70 [ib_srp]
srp_free_ch_ib+0xfc/0x380 [ib_srp]
srp_create_target+0x1071/0x19e0 [ib_srp]
kernfs_fop_write+0x180/0x210
__vfs_write+0xb1/0x2e0
vfs_write+0xf6/0x250
SyS_write+0x99/0x110
do_syscall_64+0xee/0x2b0
entry_SYSCALL_64_after_hwframe+0x42/0xb7

The buggy address belongs to the page:
page:ffffea000186bbc0 count:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x4000000000000000()
raw: 4000000000000000 0000000000000000 0000000000000000 00000000ffffffff
raw: 0000000000000000 ffffea000186bbe0 0000000000000000 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
ffff880061aef700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff880061aef780: 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00
>ffff880061aef800: f2 f2 f2 f2 f2 f2 f2 00 00 00 00 00 f2 f2 f2 f2
                                                      ^
ffff880061aef880: f2 f2 f2 00 00 00 00 00 00 00 00 00 00 00 f2 f2
ffff880061aef900: f2 f2 f2 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================

Fixes: 765d67748b ("IB: new common API for draining queues")
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Steve Wise <swise@opengridcomputing.com>
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: stable@vger.kernel.org
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-03-06 16:00:51 -07:00
..
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
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_msgs.h
cm.c RDMA/cm: Fix access to uninitialized variable 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
cma.c RDMA/cma: Use existing netif_is_bond_master function 2018-01-28 14:07:16 -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: Delete an error message for a failed memory allocation in iwpm_create_nlmsg() 2018-02-28 13:57:39 -07:00
iwpm_util.h iwpm: crash fix for large connections test 2016-03-16 13:48:32 -04:00
mad_priv.h
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
mad.c drivers: infiniband: remove duplicate includes 2017-12-22 09:39:35 -07:00
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
packer.c IB/core: trivial prink cleanup. 2016-03-03 10:20:25 -05:00
rdma_core.c IB/uverbs: Tidy uverbs_uobject_add 2018-02-28 12:55:03 -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_query.c IB/SA: Check dlid before SA agent queries for ClassPortInfo 2017-12-22 13:33:30 -07:00
sa.h
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
smi.h
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_odp.c RDMA/umem: Avoid partial declaration of non-static function 2017-11-10 13:02:12 -05:00
umem.c IB/umem: Fix use of npages/nmap fields 2017-12-18 15:37:06 -07:00
user_mad.c vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
uverbs_cmd.c RDMA/uverbs: Fix kernel panic while using XRC_TGT QP type 2018-02-21 13:52:19 -05:00
uverbs_ioctl_merge.c IB/uverbs: Fix method merging in uverbs_ioctl_merge 2018-02-15 14:59:45 -07:00
uverbs_ioctl.c IB/uverbs: Fix possible oops with duplicate ioctl attributes 2018-02-15 14:59:46 -07:00
uverbs_main.c RDMA/uverbs: Reduce number of command header flags checks 2018-02-22 22:31:18 -05:00
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
uverbs.h IB/uverbs: Allow CQ moderation with modify CQ 2017-11-13 16:59:22 -05:00
verbs.c RDMA/core: Avoid that ib_drain_qp() triggers an out-of-bounds stack access 2018-03-06 16:00:51 -07:00