android_kernel_motorola_sm6375

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Filename	Latest commit message	Latest commit date
Mohamed Khalfella d44403ec06 skbuff: skb_segment, Call zero copy functions before using skbuff frags commit 2ea35288c83b3d501a88bc17f2df8f176b5cc96f upstream. Commit `bf5c25d608` ("skbuff: in skb_segment, call zerocopy functions once per nskb") added the call to zero copy functions in skb_segment(). The change introduced a bug in skb_segment() because skb_orphan_frags() may possibly change the number of fragments or allocate new fragments altogether leaving nrfrags and frag to point to the old values. This can cause a panic with stacktrace like the one below. [ 193.894380] BUG: kernel NULL pointer dereference, address: 00000000000000bc [ 193.895273] CPU: 13 PID: 18164 Comm: vh-net-17428 Kdump: loaded Tainted: G O 5.15.123+ #26 [ 193.903919] RIP: 0010:skb_segment+0xb0e/0x12f0 [ 194.021892] Call Trace: [ 194.027422] <TASK> [ 194.072861] tcp_gso_segment+0x107/0x540 [ 194.082031] inet_gso_segment+0x15c/0x3d0 [ 194.090783] skb_mac_gso_segment+0x9f/0x110 [ 194.095016] __skb_gso_segment+0xc1/0x190 [ 194.103131] netem_enqueue+0x290/0xb10 [sch_netem] [ 194.107071] dev_qdisc_enqueue+0x16/0x70 [ 194.110884] __dev_queue_xmit+0x63b/0xb30 [ 194.121670] bond_start_xmit+0x159/0x380 [bonding] [ 194.128506] dev_hard_start_xmit+0xc3/0x1e0 [ 194.131787] __dev_queue_xmit+0x8a0/0xb30 [ 194.138225] macvlan_start_xmit+0x4f/0x100 [macvlan] [ 194.141477] dev_hard_start_xmit+0xc3/0x1e0 [ 194.144622] sch_direct_xmit+0xe3/0x280 [ 194.147748] __dev_queue_xmit+0x54a/0xb30 [ 194.154131] tap_get_user+0x2a8/0x9c0 [tap] [ 194.157358] tap_sendmsg+0x52/0x8e0 [tap] [ 194.167049] handle_tx_zerocopy+0x14e/0x4c0 [vhost_net] [ 194.173631] handle_tx+0xcd/0xe0 [vhost_net] [ 194.176959] vhost_worker+0x76/0xb0 [vhost] [ 194.183667] kthread+0x118/0x140 [ 194.190358] ret_from_fork+0x1f/0x30 [ 194.193670] </TASK> In this case calling skb_orphan_frags() updated nr_frags leaving nrfrags local variable in skb_segment() stale. This resulted in the code hitting i >= nrfrags prematurely and trying to move to next frag_skb using list_skb pointer, which was NULL, and caused kernel panic. Move the call to zero copy functions before using frags and nr_frags. Fixes: `bf5c25d608` ("skbuff: in skb_segment, call zerocopy functions once per nskb") Signed-off-by: Mohamed Khalfella <mkhalfella@purestorage.com> Reported-by: Amit Goyal <agoyal@purestorage.com> Cc: stable@vger.kernel.org Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-09-23 10:59:54 +02:00
arch	um: Fix hostaudio build errors	2023-09-23 10:59:53 +02:00
block	block/partition: fix signedness issue for Amiga partitions	2023-07-27 08:37:29 +02:00
certs	certs/blacklist_hashes.c: fix const confusion in certs blacklist	2022-06-22 14:11:22 +02:00
crypto	KEYS: asymmetric: Copy sig and digest in public_key_verify_signature()	2023-06-21 15:44:08 +02:00
Documentation	Documentation/sysctl: document page_lock_unfairness	2023-08-30 16:27:27 +02:00
drivers	virtio_ring: fix avail_wrap_counter in virtqueue_add_packed	2023-09-23 10:59:53 +02:00
fs	NFS: Guard against READDIR loop when entry names exceed MAXNAMELEN	2023-09-23 10:59:48 +02:00
include	scsi: core: Use 32-bit hostnum in scsi_host_lookup()	2023-09-23 10:59:51 +02:00
init	x86/mm: Initialize text poking earlier	2023-08-08 19:56:36 +02:00
ipc	ipc/sem: Fix dangling sem_array access in semtimedop race	2022-12-08 11:23:06 +01:00
kernel	tracing: Fix race issue between cpu buffer write and swap	2023-09-23 10:59:52 +02:00
lib	radix tree: remove unused variable	2023-08-30 16:27:26 +02:00
LICENSES
mm	tmpfs: verify {g,u}id mount options correctly	2023-09-23 10:59:40 +02:00
net	skbuff: skb_segment, Call zero copy functions before using skbuff frags	2023-09-23 10:59:54 +02:00
samples	samples/bpf: Fix buffer overflow in tcp_basertt	2023-07-27 08:37:07 +02:00
scripts	modpost: fix off by one in is_executable_section()	2023-07-27 08:37:18 +02:00
security	smackfs: Prevent underflow in smk_set_cipso()	2023-09-23 10:59:46 +02:00
sound	um: Fix hostaudio build errors	2023-09-23 10:59:53 +02:00
tools	selftests: mirror_gre_changes: Tighten up the TTL test match	2023-08-30 16:27:16 +02:00
usr
virt	KVM: Destroy target device if coalesced MMIO unregistration fails	2023-03-11 16:44:01 +01:00
.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 5.4.256	2023-09-02 09:19:19 +02:00
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.

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.