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a16a9c10b2
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Pablo Neira Ayuso a16a9c10b2 netfilter: nft_connlimit: disable bh on garbage collection 
[ Upstream commit 34a4c95abd ]

BH must be disabled when invoking nf_conncount_gc_list() to perform
garbage collection, otherwise deadlock might happen.

  nf_conncount_add+0x1f/0x50 [nf_conncount]
  nft_connlimit_eval+0x4c/0xe0 [nft_connlimit]
  nft_dynset_eval+0xb5/0x100 [nf_tables]
  nft_do_chain+0xea/0x420 [nf_tables]
  ? sch_direct_xmit+0x111/0x360
  ? noqueue_init+0x10/0x10
  ? __qdisc_run+0x84/0x510
  ? tcp_packet+0x655/0x1610 [nf_conntrack]
  ? ip_finish_output2+0x1a7/0x430
  ? tcp_error+0x130/0x150 [nf_conntrack]
  ? nf_conntrack_in+0x1fc/0x4c0 [nf_conntrack]
  nft_do_chain_ipv4+0x66/0x80 [nf_tables]
  nf_hook_slow+0x44/0xc0
  ip_rcv+0xb5/0xd0
  ? ip_rcv_finish_core.isra.19+0x360/0x360
  __netif_receive_skb_one_core+0x52/0x70
  netif_receive_skb_internal+0x34/0xe0
  napi_gro_receive+0xba/0xe0
  e1000_clean_rx_irq+0x1e9/0x420 [e1000e]
  e1000e_poll+0xbe/0x290 [e1000e]
  net_rx_action+0x149/0x3b0
  __do_softirq+0xde/0x2d8
  irq_exit+0xba/0xc0
  do_IRQ+0x85/0xd0
  common_interrupt+0xf/0xf
  </IRQ>
  RIP: 0010:nf_conncount_gc_list+0x3b/0x130 [nf_conncount]

Fixes: 2f971a8f42 ("netfilter: nf_conncount: move all list iterations under spinlock")
Reported-by: Laura Garcia Liebana <nevola@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-10-29 09:19:34 +01:00
arch xen/efi: Set nonblocking callbacks 2019-10-29 09:19:33 +01:00
block blk-wbt: fix performance regression in wbt scale_up/scale_down 2019-10-17 13:45:16 -07:00
certs export.h: remove VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR() 2018-08-22 23:21:44 +09:00
crypto crypto: skcipher - Unmap pages after an external error 2019-10-11 18:20:52 +02:00
Documentation USB: rio500: Remove Rio 500 kernel driver 2019-10-17 13:44:47 -07:00
drivers net: dsa: qca8k: Use up to 7 ports for all operations 2019-10-29 09:19:32 +01:00
firmware kbuild: remove all dummy assignments to obj- 2017-11-18 11:46:06 +09:00
fs Fix the locking in dcache_readdir() and friends 2019-10-17 13:45:35 -07:00
include hwmon: Fix HWMON_P_MIN_ALARM mask 2019-10-17 13:45:42 -07:00
init initramfs: don't free a non-existent initrd 2019-10-01 08:26:09 +02:00
ipc ipc/mqueue.c: only perform resource calculation if user valid 2019-08-06 19:06:52 +02:00
kernel perf/hw_breakpoint: Fix arch_hw_breakpoint use-before-initialization 2019-10-17 13:45:44 -07:00
lib kmemleak: increase DEBUG_KMEMLEAK_EARLY_LOG_SIZE default to 16K 2019-10-07 18:57:17 +02:00
LICENSES LICENSES: Remove CC-BY-SA-4.0 license text 2018-10-18 11:28:50 +02:00
mm mm/vmpressure.c: fix a signedness bug in vmpressure_register_event() 2019-10-17 13:45:19 -07:00
net netfilter: nft_connlimit: disable bh on garbage collection 2019-10-29 09:19:34 +01:00
samples samples, bpf: suppress compiler warning 2019-07-14 08:11:04 +02:00
scripts randstruct: Check member structs in is_pure_ops_struct() 2019-10-05 13:10:02 +02:00
security ima: fix freeing ongoing ahash_request 2019-10-11 18:21:11 +02:00
sound ASoC: sgtl5000: Improve VAG power and mute control 2019-10-11 18:20:47 +02:00
tools perf inject jit: Fix JIT_CODE_MOVE filename 2019-10-17 13:45:15 -07:00
usr kbuild: clean compressed initramfs image 2019-10-07 18:57:16 +02:00
virt KVM: coalesced_mmio: add bounds checking 2019-09-21 07:16:44 +02:00
.clang-format clang-format: Set IndentWrappedFunctionNames false 2018-08-01 18:38:51 +02:00
.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 updates for v4.17 (2nd) 2018-04-15 17:21:30 -07:00
.mailmap libnvdimm-for-4.19_misc 2018-08-25 18:13:10 -07:00
COPYING COPYING: use the new text with points to the license files 2018-03-23 12:41:45 -06:00
CREDITS 9p: remove Ron Minnich from MAINTAINERS 2018-08-17 16:20:26 -07:00
Kbuild Kbuild updates for v4.15 2017-11-17 17:45:29 -08:00
Kconfig kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt 2018-08-02 08:06:55 +09:00
MAINTAINERS USB: rio500: Remove Rio 500 kernel driver 2019-10-17 13:44:47 -07:00
Makefile Linux 4.19.80 2019-10-17 13:45:44 -07:00
README Docs: Added a pointer to the formatted docs to README 2018-03-21 09:02:53 -06:00

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.