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Filename Latest commit message Latest commit date
Daniel Starke 4d93303fd8 tty: n_gsm: fix mux activation issues in gsm_config() 
commit edd5f60c340086891fab094ad61270d6c80f9ca4 upstream.

The current implementation activates the mux if it was restarted and opens
the control channel if the mux was previously closed and we are now acting
as initiator instead of responder, which is the default setting.
This has two issues.
1) No mux is activated if we keep all default values and only switch to
initiator. The control channel is not allocated but will be opened next
which results in a NULL pointer dereference.
2) Switching the configuration after it was once configured while keeping
the initiator value the same will not reopen the control channel if it was
closed due to parameter incompatibilities. The mux remains dead.

Fix 1) by always activating the mux if it is dead after configuration.
Fix 2) by always opening the control channel after mux activation.

Fixes: e1eaea46bb ("tty: n_gsm line discipline")
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Starke <daniel.starke@siemens.com>
Link: https://lore.kernel.org/r/20220504081733.3494-2-daniel.starke@siemens.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-05-18 09:47:26 +02:00
arch s390: disable -Warray-bounds 2022-05-18 09:47:26 +02:00
block block-map: add __GFP_ZERO flag for alloc_page in function bio_copy_kern 2022-05-12 12:23:48 +02:00
certs
crypto
Documentation arm: remove CONFIG_ARCH_HAS_HOLES_MEMORYMODEL 2022-05-15 19:54:46 +02:00
drivers tty: n_gsm: fix mux activation issues in gsm_config() 2022-05-18 09:47:26 +02:00
fs gfs2: Fix filesystem block deallocation for short writes 2022-05-18 09:47:26 +02:00
include net/sched: act_pedit: really ensure the skb is writable 2022-05-18 09:47:25 +02:00
init init/main.c: return 1 from handled __setup() functions 2022-04-15 14:18:35 +02:00
ipc
kernel genirq: Synchronize interrupt thread startup 2022-05-12 12:23:41 +02:00
lib dim: initialize all struct fields 2022-05-18 09:47:25 +02:00
LICENSES
mm mm: userfaultfd: fix missing cache flush in mcopy_atomic_pte() and __mcopy_atomic() 2022-05-15 19:54:47 +02:00
net tcp: resalt the secret every 10 seconds 2022-05-18 09:47:26 +02:00
samples
scripts gcc-plugins: latent_entropy: use /dev/urandom 2022-04-20 09:19:38 +02:00
security
sound ASoC: ops: Validate input values in snd_soc_put_volsw_range() 2022-05-18 09:47:26 +02:00
tools x86: xen: insn: Decode Xen and KVM emulate-prefix signature 2022-05-15 19:54:47 +02:00
usr
virt
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.cocciconfig
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Makefile Linux 5.4.194 2022-05-15 19:54:48 +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.