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Filename Latest commit message Latest commit date
Oleksij Rempel d2136f0569 can: j1939: j1939_tp_tx_dat_new(): fix out-of-bounds memory access
commit b45193cb4df556fe6251b285a5ce44046dd36b4a upstream.

In the j1939_tp_tx_dat_new() function, an out-of-bounds memory access
could occur during the memcpy() operation if the size of skb->cb is
larger than the size of struct j1939_sk_buff_cb. This is because the
memcpy() operation uses the size of skb->cb, leading to a read beyond
the struct j1939_sk_buff_cb.

Updated the memcpy() operation to use the size of struct
j1939_sk_buff_cb instead of the size of skb->cb. This ensures that the
memcpy() operation only reads the memory within the bounds of struct
j1939_sk_buff_cb, preventing out-of-bounds memory access.

Additionally, add a BUILD_BUG_ON() to check that the size of skb->cb
is greater than or equal to the size of struct j1939_sk_buff_cb. This
ensures that the skb->cb buffer is large enough to hold the
j1939_sk_buff_cb structure.

Fixes: 9d71dd0c70 ("can: add support of SAE J1939 protocol")
Reported-by: Shuangpeng Bai <sjb7183@psu.edu>
Tested-by: Shuangpeng Bai <sjb7183@psu.edu>
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://groups.google.com/g/syzkaller/c/G_LL-C3plRs/m/-8xCi6dCAgAJ
Link: https://lore.kernel.org/all/20230404073128.3173900-1-o.rempel@pengutronix.de
Cc: stable@vger.kernel.org
[mkl: rephrase commit message]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-04-20 12:07:34 +02:00
arch treewide: Replace DECLARE_TASKLET() with DECLARE_TASKLET_OLD() 2023-04-20 12:07:32 +02:00
block
certs
crypto
Documentation
drivers tty: serial: fsl_lpuart: avoid checking for transfer complete when UARTCTRL_SBK is asserted in lpuart32_tx_empty 2023-04-20 12:07:34 +02:00
fs nilfs2: fix sysfs interface lifetime 2023-04-20 12:07:34 +02:00
include ftrace: Mark get_lock_parent_ip() __always_inline 2023-04-20 12:07:34 +02:00
init
ipc
kernel perf/core: Fix the same task check in perf_event_set_output 2023-04-20 12:07:34 +02:00
lib
LICENSES
mm
net can: j1939: j1939_tp_tx_dat_new(): fix out-of-bounds memory access 2023-04-20 12:07:34 +02:00
samples
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sound ALSA: hda/realtek: Add quirk for Clevo X370SNW 2023-04-20 12:07:34 +02:00
tools
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Makefile Linux 5.4.240 2023-04-05 11:16:46 +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.