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authorDaniel Starke <daniel.starke@siemens.com>2022-07-01 08:16:52 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2022-07-01 10:07:40 +0200
commit32dd59f96924f45e33bc79854f7a00679c0fa28e (patch)
treec45bdc462f2dfa290fb83f8a675e05b34463229e /tools/perf/scripts/python/export-to-postgresql.py
parenttty: n_gsm: fix packet re-transmission without open control channel (diff)
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tty: n_gsm: fix race condition in gsmld_write()
The function may be used by the user directly and also by the n_gsm internal functions. They can lead into a race condition which results in interleaved frames if both are writing at the same time. The receiving side is not able to decode those interleaved frames correctly. Add a lock around the low side tty write to avoid race conditions and frame interleaving between user originated writes and n_gsm writes. Fixes: e1eaea46bb40 ("tty: n_gsm line discipline") Signed-off-by: Daniel Starke <daniel.starke@siemens.com> Link: https://lore.kernel.org/r/20220701061652.39604-9-daniel.starke@siemens.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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