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Florian Fainelli 9fb20801da net: Fix ip_mc_{dec,inc}_group allocation context After `4effd28c12` ("bridge: join all-snoopers multicast address"), I started seeing the following sleep in atomic warnings: [ 26.763893] BUG: sleeping function called from invalid context at mm/slab.h:421 [ 26.771425] in_atomic(): 1, irqs_disabled(): 0, pid: 1658, name: sh [ 26.777855] INFO: lockdep is turned off. [ 26.781916] CPU: 0 PID: 1658 Comm: sh Not tainted 5.0.0-rc4 #20 [ 26.787943] Hardware name: BCM97278SV (DT) [ 26.792118] Call trace: [ 26.794645] dump_backtrace+0x0/0x170 [ 26.798391] show_stack+0x24/0x30 [ 26.801787] dump_stack+0xa4/0xe4 [ 26.805182] ___might_sleep+0x208/0x218 [ 26.809102] __might_sleep+0x78/0x88 [ 26.812762] kmem_cache_alloc_trace+0x64/0x28c [ 26.817301] igmp_group_dropped+0x150/0x230 [ 26.821573] ip_mc_dec_group+0x1b0/0x1f8 [ 26.825585] br_ip4_multicast_leave_snoopers.isra.11+0x174/0x190 [ 26.831704] br_multicast_toggle+0x78/0xcc [ 26.835887] store_bridge_parm+0xc4/0xfc [ 26.839894] multicast_snooping_store+0x3c/0x4c [ 26.844517] dev_attr_store+0x44/0x5c [ 26.848262] sysfs_kf_write+0x50/0x68 [ 26.852006] kernfs_fop_write+0x14c/0x1b4 [ 26.856102] __vfs_write+0x60/0x190 [ 26.859668] vfs_write+0xc8/0x168 [ 26.863059] ksys_write+0x70/0xc8 [ 26.866449] __arm64_sys_write+0x24/0x30 [ 26.870458] el0_svc_common+0xa0/0x11c [ 26.874291] el0_svc_handler+0x38/0x70 [ 26.878120] el0_svc+0x8/0xc while toggling the bridge's multicast_snooping attribute dynamically. Pass a gfp_t down to igmpv3_add_delrec(), introduce __igmp_group_dropped() and introduce __ip_mc_dec_group() to take a gfp_t argument. Similarly introduce ____ip_mc_inc_group() and __ip_mc_inc_group() to allow caller to specify gfp_t. IPv6 part of the patch appears fine. Fixes: `4effd28c12` ("bridge: join all-snoopers multicast address") Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2019-02-03 12:11:12 -08:00
arch	sock: Add SO_RCVTIMEO_NEW and SO_SNDTIMEO_NEW	2019-02-03 11:17:31 -08:00
block	Revert "block: cover another queue enter recursion via BIO_QUEUE_ENTERED"	2019-01-27 06:35:28 -07:00
certs	kbuild: remove redundant target cleaning on failure	2019-01-06 09:46:51 +09:00
crypto	crypto: sm3 - fix undefined shift by >= width of value	2019-01-10 21:37:32 +08:00
Documentation	socket: Update timestamping Documentation	2019-02-03 11:17:31 -08:00
drivers	net: devlink: report cell size of shared buffers	2019-02-03 11:25:34 -08:00
firmware	kbuild: change filechk to surround the given command with { }	2019-01-06 09:46:51 +09:00
fs	socket: Rename SO_RCVTIMEO/ SO_SNDTIMEO with _OLD suffixes	2019-02-03 11:17:31 -08:00
include	net: Fix ip_mc_{dec,inc}_group allocation context	2019-02-03 12:11:12 -08:00
init	kbuild: Disable LD_DEAD_CODE_DATA_ELIMINATION with ftrace & GCC <= 4.7	2019-01-14 10:37:09 +09:00
ipc	ipc: IPCMNI limit check for semmni	2018-10-31 08:54:14 -07:00
kernel	bpf: introduce BPF_F_LOCK flag	2019-02-01 20:55:39 +01:00
lib	XArray updates for 5.0-rc3	2019-01-22 17:08:30 +13:00
LICENSES	This is a fairly typical cycle for documentation. There's some welcome	2018-10-24 18:01:11 +01:00
mm	Revert "mm, memory_hotplug: initialize struct pages for the full memory section"	2019-01-28 10:35:22 -08:00
net	net: Fix ip_mc_{dec,inc}_group allocation context	2019-02-03 12:11:12 -08:00
samples	samples/bpf: Check the prog id before exiting	2019-02-01 23:37:51 +01:00
scripts	Bug fixes for gcc-plugins	2019-01-21 13:07:03 +13:00
security	Merge branch 'fixes-v5.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2019-01-17 16:54:58 +12:00
sound	sound fixes for 5.0-rc4	2019-01-25 05:55:26 +13:00
tools	selftests: add missing include unistd	2019-02-03 11:17:30 -08:00
usr	user/Makefile: Fix typo and capitalization in comment section	2018-12-11 00:18:03 +09:00
virt	KVM: validate userspace input in kvm_clear_dirty_log_protect()	2019-01-11 18:38:07 +01:00
.clang-format	clang-format: Update .clang-format with the latest for_each macro list	2019-01-19 19:26:06 +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: Add support for DT binding schema checks	2018-12-13 09:41:32 -06:00
.mailmap	A few early MIPS fixes for 4.21:	2019-01-05 12:48:25 -08:00
COPYING	COPYING: use the new text with points to the license files	2018-03-23 12:41:45 -06:00
CREDITS	Add CREDITS entry for Shaohua Li	2019-01-04 14:27:09 -07:00
Kbuild	kbuild: use assignment instead of define ... endef for filechk_* rules	2019-01-06 10:22:35 +09:00
Kconfig	kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt	2018-08-02 08:06:55 +09:00
MAINTAINERS	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-01-29 21:18:54 -08:00
Makefile	Linux 5.0-rc4	2019-01-27 15:18:05 -08:00
README	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -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.

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.