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Filename Latest commit message Latest commit date
Eric Dumazet 66fb33254f ipmr: properly check rhltable_init() return value 
commit 8fb472c09b ("ipmr: improve hash scalability")
added a call to rhltable_init() without checking its return value.

This problem was then later copied to IPv6 and factorized in commit
0bbbf0e7d0 ("ipmr, ip6mr: Unite creation of new mr_table")

kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 31552 Comm: syz-executor7 Not tainted 4.17.0-rc5+ #60
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:rht_key_hashfn include/linux/rhashtable.h:277 [inline]
RIP: 0010:__rhashtable_lookup include/linux/rhashtable.h:630 [inline]
RIP: 0010:rhltable_lookup include/linux/rhashtable.h:716 [inline]
RIP: 0010:mr_mfc_find_parent+0x2ad/0xbb0 net/ipv4/ipmr_base.c:63
RSP: 0018:ffff8801826aef70 EFLAGS: 00010203
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffc90001ea0000
RDX: 0000000000000079 RSI: ffffffff8661e859 RDI: 000000000000000c
RBP: ffff8801826af1c0 R08: ffff8801b2212000 R09: ffffed003b5e46c2
R10: ffffed003b5e46c2 R11: ffff8801daf23613 R12: dffffc0000000000
R13: ffff8801826af198 R14: ffff8801cf8225c0 R15: ffff8801826af658
FS:  00007ff7fa732700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000003ffffff9c CR3: 00000001b0210000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ip6mr_cache_find_parent net/ipv6/ip6mr.c:981 [inline]
 ip6mr_mfc_delete+0x1fe/0x6b0 net/ipv6/ip6mr.c:1221
 ip6_mroute_setsockopt+0x15c6/0x1d70 net/ipv6/ip6mr.c:1698
 do_ipv6_setsockopt.isra.9+0x422/0x4660 net/ipv6/ipv6_sockglue.c:163
 ipv6_setsockopt+0xbd/0x170 net/ipv6/ipv6_sockglue.c:922
 rawv6_setsockopt+0x59/0x140 net/ipv6/raw.c:1060
 sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:3039
 __sys_setsockopt+0x1bd/0x390 net/socket.c:1903
 __do_sys_setsockopt net/socket.c:1914 [inline]
 __se_sys_setsockopt net/socket.c:1911 [inline]
 __x64_sys_setsockopt+0xbe/0x150 net/socket.c:1911
 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Fixes: 8fb472c09b ("ipmr: improve hash scalability")
Fixes: 0bbbf0e7d0 ("ipmr, ip6mr: Unite creation of new mr_table")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Cc: Yuval Mintz <yuvalm@mellanox.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-22 15:31:15 -04:00
arch MIPS fixes for 4.17-rc7 2018-05-21 08:58:00 -07:00
block
certs
crypto
Documentation Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-05-21 08:37:48 -07:00
drivers isdn: eicon: fix a missing-check bug 2018-05-22 13:48:34 -04:00
firmware
fs for-4.17-rc5-tag 2018-05-20 12:04:27 -07:00
include sctp: fix the issue that flags are ignored when using kernel_connect 2018-05-22 13:37:26 -04:00
init sched/fair: Fix documentation file path 2018-05-18 09:05:28 +02:00
ipc
kernel Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-05-21 08:37:48 -07:00
lib radix tree: fix multi-order iteration race 2018-05-18 17:17:12 -07:00
LICENSES
mm mmap: relax file size limit for regular files 2018-05-19 09:29:11 -07:00
net ipmr: properly check rhltable_init() return value 2018-05-22 15:31:15 -04:00
samples x86/cpufeature: Guard asm_volatile_goto usage for BPF compilation 2018-05-13 21:49:14 +02:00
scripts scripts/faddr2line: fix error when addr2line output contains discriminator 2018-05-11 17:28:45 -07:00
security selinux/stable-4.17 PR 20180516 2018-05-17 10:02:19 -07:00
sound ALSA: usb-audio: Use Class Specific EP for UAC3 devices. 2018-05-15 07:29:10 +02:00
tools Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-05-21 08:37:48 -07:00
usr
virt KVM: arm/arm64: VGIC/ITS save/restore: protect kvm_read_guest() calls 2018-05-15 13:36:53 +02:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS dmaengine fix for 4.17-rc6 2018-05-19 09:54:02 -07:00
Makefile Linux 4.17-rc6 2018-05-20 15:31:38 -07:00
README

README 

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

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

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.