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Filename Latest commit message Latest commit date
Sven Eckelmann c5f261825f batman-adv: Hold rtnl lock during MTU update via netlink
commit 987aae75fc1041072941ffb622b45ce2359a99b9 upstream.

The automatic recalculation of the maximum allowed MTU is usually triggered
by code sections which are already rtnl lock protected by callers outside
of batman-adv. But when the fragmentation setting is changed via
batman-adv's own batadv genl family, then the rtnl lock is not yet taken.

But dev_set_mtu requires that the caller holds the rtnl lock because it
uses netdevice notifiers. And this code will then fail the check for this
lock:

  RTNL: assertion failed at net/core/dev.c (1953)

Cc: stable@vger.kernel.org
Reported-by: syzbot+f8812454d9b3ac00d282@syzkaller.appspotmail.com
Fixes: c6a953cce8d0 ("batman-adv: Trigger events for auto adjusted MTU")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20230821-batadv-missing-mtu-rtnl-lock-v1-1-1c5a7bfe861e@narfation.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-08-30 16:27:25 +02:00
arch MIPS: cpu-features: Use boot_cpu_type for CPU type based features 2023-08-30 16:27:21 +02:00
block block/partition: fix signedness issue for Amiga partitions 2023-07-27 08:37:29 +02:00
certs
crypto
Documentation PM: runtime: Add pm_runtime_get_if_active() 2023-08-30 16:27:12 +02:00
drivers clk: Fix slab-out-of-bounds error in devm_clk_release() 2023-08-30 16:27:25 +02:00
fs nfsd: Fix race to FREE_STATEID and cl_revoked 2023-08-30 16:27:25 +02:00
include bonding: fix macvlan over alb bond support 2023-08-30 16:27:24 +02:00
init x86/mm: Initialize text poking earlier 2023-08-08 19:56:36 +02:00
ipc
kernel tracing: Fix memleak due to race between current_tracer and trace 2023-08-30 16:27:23 +02:00
lib test_firmware: return ENOMEM instead of ENOSPC on failed memory allocation 2023-08-11 11:54:00 +02:00
LICENSES
mm
net batman-adv: Hold rtnl lock during MTU update via netlink 2023-08-30 16:27:25 +02:00
samples
scripts
security IMA: allow/fix UML builds 2023-08-30 16:27:11 +02:00
sound ASoC: fsl_sai: Disable bit clock with transmitter 2023-08-30 16:27:22 +02:00
tools selftests: mirror_gre_changes: Tighten up the TTL test match 2023-08-30 16:27:16 +02:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS iio: stx104: Move to addac subdirectory 2023-08-30 16:27:12 +02:00
Makefile Linux 5.4.254 2023-08-16 18:19:25 +02:00
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.