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Filename Latest commit message Latest commit date
Keita Suzuki b21f62b49e media: dvb-core: Fix double free in dvb_register_device()
commit 6b0d0477fce747d4137aa65856318b55fba72198 upstream.

In function dvb_register_device() -> dvb_register_media_device() ->
dvb_create_media_entity(), dvb->entity is allocated and initialized. If
the initialization fails, it frees the dvb->entity, and return an error
code. The caller takes the error code and handles the error by calling
dvb_media_device_free(), which unregisters the entity and frees the
field again if it is not NULL. As dvb->entity may not NULLed in
dvb_create_media_entity() when the allocation of dvbdev->pad fails, a
double free may occur. This may also cause an Use After free in
media_device_unregister_entity().

Fix this by storing NULL to dvb->entity when it is freed.

Link: https://lore.kernel.org/linux-media/20220426052921.2088416-1-keitasuzuki.park@sslab.ics.keio.ac.jp
Fixes: fcd5ce4b39 ("media: dvb-core: fix a memory leak bug")
Cc: stable@vger.kernel.org
Cc: Wenwen Wang <wenwen@cs.uga.edu>
Signed-off-by: Keita Suzuki <keitasuzuki.park@sslab.ics.keio.ac.jp>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-01-18 11:41:48 +01:00
arch ARM: 9256/1: NWFPE: avoid compiler-generated __aeabi_uldivmod 2023-01-18 11:41:48 +01:00
block blk-mq: fix possible memleak when register 'hctx' failed 2023-01-18 11:41:38 +01:00
certs
crypto crypto: tcrypt - Fix multibuffer skcipher speed test mem leak 2023-01-18 11:41:19 +01:00
Documentation ASoC: dt-bindings: wcd9335: fix reset line polarity in example 2023-01-18 11:41:06 +01:00
drivers media: dvb-core: Fix double free in dvb_register_device() 2023-01-18 11:41:48 +01:00
fs binfmt: Fix error return code in load_elf_fdpic_binary() 2023-01-18 11:41:46 +01:00
include nvme: fix the NVME_CMD_EFFECTS_CSE_MASK definition 2023-01-18 11:41:43 +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 tracing: Fix infinite loop in tracing_read_pipe on overflowed print_trace_line 2023-01-18 11:41:48 +01:00
lib test_firmware: fix memory leak in test_firmware_init() 2023-01-18 11:41:23 +01:00
LICENSES
mm mm, compaction: fix fast_isolate_around() to stay within boundaries 2023-01-18 11:41:44 +01:00
net net/af_packet: make sure to pull mac header 2023-01-18 11:41:45 +01:00
samples samples: vfio-mdev: Fix missing pci_disable_device() in mdpy_fb_probe() 2023-01-18 11:41:26 +01:00
scripts scripts/faddr2line: Fix regression in name resolution on ppc64le 2022-12-08 11:23:02 +01:00
security apparmor: Use pointer to struct aa_label for lbs_cred 2023-01-18 11:41:17 +01:00
sound ALSA: line6: fix stack overflow in line6_midi_transmit 2023-01-18 11:41:44 +01:00
tools selftests: Use optional USERCFLAGS and USERLDFLAGS 2023-01-18 11:41:46 +01:00
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Makefile Linux 5.4.228 2022-12-19 12:24:17 +01:00
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.