linux-stable

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Leon Romanovsky 4dba68fd1d RDMA/ucma: Check that device is connected prior to access it commit `4b658d1bbc` upstream. Add missing check that device is connected prior to access it. [ 55.358652] BUG: KASAN: null-ptr-deref in rdma_init_qp_attr+0x4a/0x2c0 [ 55.359389] Read of size 8 at addr 00000000000000b0 by task qp/618 [ 55.360255] [ 55.360432] CPU: 1 PID: 618 Comm: qp Not tainted 4.16.0-rc1-00071-gcaf61b1b8b88 #91 [ 55.361693] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.11.0-0-g63451fca13-prebuilt.qemu-project.org 04/01/2014 [ 55.363264] Call Trace: [ 55.363833] dump_stack+0x5c/0x77 [ 55.364215] kasan_report+0x163/0x380 [ 55.364610] ? rdma_init_qp_attr+0x4a/0x2c0 [ 55.365238] rdma_init_qp_attr+0x4a/0x2c0 [ 55.366410] ucma_init_qp_attr+0x111/0x200 [ 55.366846] ? ucma_notify+0xf0/0xf0 [ 55.367405] ? _get_random_bytes+0xea/0x1b0 [ 55.367846] ? urandom_read+0x2f0/0x2f0 [ 55.368436] ? kmem_cache_alloc_trace+0xd2/0x1e0 [ 55.369104] ? refcount_inc_not_zero+0x9/0x60 [ 55.369583] ? refcount_inc+0x5/0x30 [ 55.370155] ? rdma_create_id+0x215/0x240 [ 55.370937] ? _copy_to_user+0x4f/0x60 [ 55.371620] ? mem_cgroup_commit_charge+0x1f5/0x290 [ 55.372127] ? _copy_from_user+0x5e/0x90 [ 55.372720] ucma_write+0x174/0x1f0 [ 55.373090] ? ucma_close_id+0x40/0x40 [ 55.373805] ? __lru_cache_add+0xa8/0xd0 [ 55.374403] __vfs_write+0xc4/0x350 [ 55.374774] ? kernel_read+0xa0/0xa0 [ 55.375173] ? fsnotify+0x899/0x8f0 [ 55.375544] ? fsnotify_unmount_inodes+0x170/0x170 [ 55.376689] ? __fsnotify_update_child_dentry_flags+0x30/0x30 [ 55.377522] ? handle_mm_fault+0x174/0x320 [ 55.378169] vfs_write+0xf7/0x280 [ 55.378864] SyS_write+0xa1/0x120 [ 55.379270] ? SyS_read+0x120/0x120 [ 55.379643] ? mm_fault_error+0x180/0x180 [ 55.380071] ? task_work_run+0x7d/0xd0 [ 55.380910] ? __task_pid_nr_ns+0x120/0x140 [ 55.381366] ? SyS_read+0x120/0x120 [ 55.381739] do_syscall_64+0xeb/0x250 [ 55.382143] entry_SYSCALL_64_after_hwframe+0x21/0x86 [ 55.382841] RIP: 0033:0x7fc2ef803e99 [ 55.383227] RSP: 002b:00007fffcc5f3be8 EFLAGS: 00000217 ORIG_RAX: 0000000000000001 [ 55.384173] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc2ef803e99 [ 55.386145] RDX: 0000000000000057 RSI: 0000000020000080 RDI: 0000000000000003 [ 55.388418] RBP: 00007fffcc5f3c00 R08: 0000000000000000 R09: 0000000000000000 [ 55.390542] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000400480 [ 55.392916] R13: 00007fffcc5f3cf0 R14: 0000000000000000 R15: 0000000000000000 [ 55.521088] Code: e5 4d 1e ff 48 89 df 44 0f b6 b3 b8 01 00 00 e8 65 50 1e ff 4c 8b 2b 49 8d bd b0 00 00 00 e8 56 50 1e ff 41 0f b6 c6 48 c1 e0 04 <49> 03 85 b0 00 00 00 48 8d 78 08 48 89 04 24 e8 3a 4f 1e ff 48 [ 55.525980] RIP: rdma_init_qp_attr+0x52/0x2c0 RSP: ffff8801e2c2f9d8 [ 55.532648] CR2: 00000000000000b0 [ 55.534396] ---[ end trace 70cee64090251c0b ]--- Fixes: `7521663857` ("RDMA/cma: Export rdma cm interface to userspace") Fixes: `d541e45500` ("IB/core: Convert ah_attr from OPA to IB when copying to user") Reported-by: <syzbot+7b62c837c2516f8f38c8@syzkaller.appspotmail.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-04-08 14:26:28 +02:00
arch	powerpc/64s: Fix i-side SLB miss bad address handler saving nonvolatile GPRs	2018-04-08 14:26:28 +02:00
block	partitions/msdos: Unable to mount UFS 44bsd partitions	2018-04-08 14:26:28 +02:00
certs	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
crypto	crypto: ecc - Fix NULL pointer deref. on no default_rng	2018-03-19 08:42:49 +01:00
Documentation	iio: ABI: Fix name of timestamp sysfs file	2018-03-28 18:24:49 +02:00
drivers	RDMA/ucma: Check that device is connected prior to access it	2018-04-08 14:26:28 +02:00
firmware	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
fs	ceph: only dirty ITER_IOVEC pages for direct read	2018-04-08 14:26:27 +02:00
include	net: use skb_to_full_sk() in skb_update_prio()	2018-03-31 18:10:40 +02:00
init	kmemcheck: stop using GFP_NOTRACK and SLAB_NOTRACK	2018-02-22 15:42:23 +01:00
ipc	ipc/shm.c: add split function to shm_vm_ops	2018-04-08 14:26:27 +02:00
kernel	perf/hwbp: Simplify the perf-hwbp code, fix documentation	2018-04-08 14:26:27 +02:00
lib	rhashtable: Fix rhlist duplicates insertion	2018-03-31 18:10:40 +02:00
mm	mm/vmscan: wake up flushers for legacy cgroups too	2018-03-28 18:24:41 +02:00
net	xfrm_user: uncoditionally validate esn replay attribute struct	2018-04-08 14:26:28 +02:00
samples	samples/bpf: adjust rlimit RLIMIT_MEMLOCK for xdp1	2017-12-20 10:10:31 +01:00
scripts	kbuild: fix linker feature test macros when cross compiling with Clang	2018-03-24 11:01:29 +01:00
security	/dev/mem: Add bounce buffer for copy-out	2018-03-24 11:01:24 +01:00
sound	ALSA: pcm: potential uninitialized return values	2018-04-08 14:26:27 +02:00
tools	x86/pkeys/selftests: Rename 'si_pkey' to 'siginfo_pkey'	2018-03-28 18:24:50 +02:00
usr	initramfs: fix initramfs rebuilds w/ compression after disabling	2017-11-03 07:39:19 -07:00
virt	KVM: arm/arm64: vgic: Don't populate multiple LRs with the same vintid	2018-03-21 12:06:43 +01:00
.cocciconfig
.get_maintainer.ignore
.gitattributes	.gitattributes: set git diff driver for C source code files	2016-10-07 18:46:30 -07:00
.gitignore	kbuild: rpm-pkg: keep spec file until make mrproper	2018-02-13 10:19:46 +01:00
.mailmap	.mailmap: Add Maciej W. Rozycki's Imagination e-mail address	2017-11-10 12:16:15 -08:00
COPYING
CREDITS	MAINTAINERS: update TPM driver infrastructure changes	2017-11-09 17:58:40 -08:00
Kbuild	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
Kconfig	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
MAINTAINERS	dt-bindings: Document mti,mips-cpc binding	2018-03-15 10:54:35 +01:00
Makefile	Linux 4.14.32	2018-03-31 18:10:43 +02:00
README	README: add a new README file, pointing to the Documentation/	2016-10-24 08:12:35 -02:00

README

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.