GitHub-Mirror/Star64_linux

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Remi Pommarel a038a787d5 batman-adv: Do not get eth header before batadv_check_management_packet commit `eac27a41ab` upstream. If received skb in batadv_v_elp_packet_recv or batadv_v_ogm_packet_recv is either cloned or non linearized then its data buffer will be reallocated by batadv_check_management_packet when skb_cow or skb_linearize get called. Thus geting ethernet header address inside skb data buffer before batadv_check_management_packet had any chance to reallocate it could lead to the following kernel panic: Unable to handle kernel paging request at virtual address ffffff8020ab069a Mem abort info: ESR = 0x96000007 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x07: level 3 translation fault Data abort info: ISV = 0, ISS = 0x00000007 CM = 0, WnR = 0 swapper pgtable: 4k pages, 39-bit VAs, pgdp=0000000040f45000 [ffffff8020ab069a] pgd=180000007fffa003, p4d=180000007fffa003, pud=180000007fffa003, pmd=180000007fefe003, pte=0068000020ab0706 Internal error: Oops: 96000007 [#1] SMP Modules linked in: ahci_mvebu libahci_platform libahci dvb_usb_af9035 dvb_usb_dib0700 dib0070 dib7000m dibx000_common ath11k_pci ath10k_pci ath10k_core mwl8k_new nf_nat_sip nf_conntrack_sip xhci_plat_hcd xhci_hcd nf_nat_pptp nf_conntrack_pptp at24 sbsa_gwdt CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.15.42-00066-g3242268d425c-dirty #550 Hardware name: A8k (DT) pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : batadv_is_my_mac+0x60/0xc0 lr : batadv_v_ogm_packet_recv+0x98/0x5d0 sp : ffffff8000183820 x29: ffffff8000183820 x28: 0000000000000001 x27: ffffff8014f9af00 x26: 0000000000000000 x25: 0000000000000543 x24: 0000000000000003 x23: ffffff8020ab0580 x22: 0000000000000110 x21: ffffff80168ae880 x20: 0000000000000000 x19: ffffff800b561000 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: 00dc098924ae0032 x14: 0f0405433e0054b0 x13: ffffffff00000080 x12: 0000004000000001 x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000000 x8 : 0000000000000000 x7 : ffffffc076dae000 x6 : ffffff8000183700 x5 : ffffffc00955e698 x4 : ffffff80168ae000 x3 : ffffff80059cf000 x2 : ffffff800b561000 x1 : ffffff8020ab0696 x0 : ffffff80168ae880 Call trace: batadv_is_my_mac+0x60/0xc0 batadv_v_ogm_packet_recv+0x98/0x5d0 batadv_batman_skb_recv+0x1b8/0x244 __netif_receive_skb_core.isra.0+0x440/0xc74 __netif_receive_skb_one_core+0x14/0x20 netif_receive_skb+0x68/0x140 br_pass_frame_up+0x70/0x80 br_handle_frame_finish+0x108/0x284 br_handle_frame+0x190/0x250 __netif_receive_skb_core.isra.0+0x240/0xc74 __netif_receive_skb_list_core+0x6c/0x90 netif_receive_skb_list_internal+0x1f4/0x310 napi_complete_done+0x64/0x1d0 gro_cell_poll+0x7c/0xa0 __napi_poll+0x34/0x174 net_rx_action+0xf8/0x2a0 _stext+0x12c/0x2ac run_ksoftirqd+0x4c/0x7c smpboot_thread_fn+0x120/0x210 kthread+0x140/0x150 ret_from_fork+0x10/0x20 Code: f9403844 eb03009f 54fffee1 f94 Thus ethernet header address should only be fetched after batadv_check_management_packet has been called. Fixes: `0da0035942` ("batman-adv: OGMv2 - add basic infrastructure") Cc: stable@vger.kernel.org Signed-off-by: Remi Pommarel <repk@triplefau.lt> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-09-05 01:25:08 +08:00
arch	Revert "KVM: x86: enable TDP MMU by default"	2023-09-05 01:25:07 +08:00
block	block/partition: fix signedness issue for Amiga partitions	2023-08-20 15:24:51 +08:00
certs	certs/blacklist_hashes.c: fix const confusion in certs blacklist	2023-04-19 17:50:34 +08:00
crypto	KEYS: asymmetric: Copy sig and digest in public_key_verify_signature()	2023-08-20 15:21:12 +08:00
Documentation	x86/cpu: Rename srso_(.*)_alias to srso_alias_\1	2023-08-28 23:27:07 +08:00
drivers	clk: Fix slab-out-of-bounds error in devm_clk_release()	2023-09-05 01:25:07 +08:00
fs	nfsd: Fix race to FREE_STATEID and cl_revoked	2023-09-05 01:25:08 +08:00
include	bonding: fix macvlan over alb bond support	2023-09-05 01:25:07 +08:00
init	x86/mm: Initialize text poking earlier	2023-08-20 16:01:29 +08:00
io_uring	io_uring: correct check for O_TMPFILE	2023-08-20 16:01:40 +08:00
ipc	ipc/sem: Fix dangling sem_array access in semtimedop race	2023-04-19 17:56:54 +08:00
kernel	tracing: Fix memleak due to race between current_tracer and trace	2023-09-05 01:25:05 +08:00
lib	test_firmware: return ENOMEM instead of ENOSPC on failed memory allocation	2023-08-20 15:24:43 +08:00
LICENSES	LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes"	2021-07-15 06:31:24 -06:00
mm	mm: add a call to flush_cache_vmap() in vmap_pfn()	2023-09-05 01:25:07 +08:00
net	batman-adv: Do not get eth header before batadv_check_management_packet	2023-09-05 01:25:08 +08:00
samples	samples: ftrace: Save required argument registers in sample trampolines	2023-08-20 16:01:05 +08:00
scripts	kbuild: Disable GCOV for *.mod.o	2023-08-20 15:24:38 +08:00
security	selinux: set next pointer before attaching to list	2023-09-05 01:25:08 +08:00
sound	ALSA: ymfpci: Fix the missing snd_card_free() call at probe error	2023-09-05 01:25:07 +08:00
tools	objtool/x86: Fix SRSO mess	2023-09-05 01:25:02 +08:00
usr	usr/include/Makefile: add linux/nfc.h to the compile-test coverage	2023-04-19 17:44:58 +08:00
virt	KVM: Grab a reference to KVM for VM and vCPU stats file descriptors	2023-08-20 16:01:23 +08:00
.clang-format	clang-format: Update with the latest for_each macro list	2021-05-12 23:32:39 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes	.gitattributes: use 'dts' diff driver for dts files	2019-12-04 19:44:11 -08:00
.gitignore	.gitignore: ignore only top-level modules.builtin	2021-05-02 00:43:35 +09:00
.mailmap	mailmap: add Andrej Shadura	2021-10-18 20:22:03 -10:00
COPYING	COPYING: state that all contributions really are covered by this file	2020-02-10 13:32:20 -08:00
CREDITS	MAINTAINERS: Move Daniel Drake to credits	2021-09-21 08:34:58 +03:00
Kbuild	kbuild: rename hostprogs-y/always to hostprogs/always-y	2020-02-04 01:53:07 +09:00
Kconfig	kbuild: ensure full rebuild when the compiler is updated	2020-05-12 13:28:33 +09:00
MAINTAINERS	iio: stx104: Move to addac subdirectory	2023-08-28 23:26:58 +08:00
Makefile	Linux 5.15.128	2023-08-28 23:27:08 +08:00
README
stfsync.txt	add file to track last rebase commit from stf	2023-08-21 00:12:49 +08:00

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.