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Filename Latest commit message Latest commit date
Ross Lagerwall 8fe1bf6f32 xen/netback: Ensure protocol headers don't fall in the non-linear area 
[ Upstream commit ad7f402ae4f466647c3a669b8a6f3e5d4271c84a ]

In some cases, the frontend may send a packet where the protocol headers
are spread across multiple slots. This would result in netback creating
an skb where the protocol headers spill over into the non-linear area.
Some drivers and NICs don't handle this properly resulting in an
interface reset or worse.

This issue was introduced by the removal of an unconditional skb pull in
the tx path to improve performance.  Fix this without reintroducing the
pull by setting up grant copy ops for as many slots as needed to reach
the XEN_NETBACK_TX_COPY_LEN size. Adjust the rest of the code to handle
multiple copy operations per skb.

This is XSA-423 / CVE-2022-3643.

Fixes: 7e5d775395 ("xen-netback: remove unconditional __pskb_pull_tail() in guest Tx path")
Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Reviewed-by: Paul Durrant <paul@xen.org>
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-12-14 11:30:42 +01:00
arch ARM: dts: rockchip: disable arm_global_timer on rk3066 and rk3188 2022-12-14 11:30:40 +01:00
block block, bfq: fix null pointer dereference in bfq_bio_bfqg() 2022-12-08 11:22:57 +01:00
certs
crypto crypto: akcipher - default implementation for setting a private key 2022-10-26 13:22:45 +02:00
Documentation docs: update mediator contact information in CoC doc 2022-11-25 17:42:20 +01:00
drivers xen/netback: Ensure protocol headers don't fall in the non-linear area 2022-12-14 11:30:42 +01:00
fs btrfs: send: avoid unaligned encoded writes when attempting to clone range 2022-12-14 11:30:41 +01:00
include mm/khugepaged: fix GUP-fast interaction by sending IPI 2022-12-14 11:30:42 +01:00
init init/Kconfig: fix CC_HAS_ASM_GOTO_TIED_OUTPUT test with dash 2022-12-08 11:22:59 +01:00
ipc ipc/sem: Fix dangling sem_array access in semtimedop race 2022-12-08 11:23:06 +01:00
kernel proc: proc_skip_spaces() shouldn't think it is working on C strings 2022-12-08 11:23:06 +01:00
lib Kconfig.debug: provide a little extra FRAME_WARN leeway when KASAN is enabled 2022-12-08 11:23:05 +01:00
LICENSES
mm mm/khugepaged: invoke MMU notifiers in shmem/file collapse paths 2022-12-14 11:30:42 +01:00
net 9p/xen: check logical size for buffer size 2022-12-14 11:30:41 +01:00
samples
scripts scripts/faddr2line: Fix regression in name resolution on ppc64le 2022-12-08 11:23:02 +01:00
security capabilities: fix potential memleak on error path from vfs_getxattr_alloc() 2022-11-10 17:57:55 +01:00
sound ASoC: soc-pcm: Add NULL check in BE reparenting 2022-12-14 11:30:41 +01:00
tools ipv4: Fix route deletion when nexthop info is not specified 2022-12-08 11:23:05 +01:00
usr
virt KVM: arm64: vgic: Fix exit condition in scan_its_table() 2022-10-29 10:20:35 +02:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS MAINTAINERS: add Chandan as xfs maintainer for 5.4.y 2022-09-28 11:03:58 +02:00
Makefile Linux 5.4.226 2022-12-08 11:23:06 +01:00
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.