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soc: apple: rtkit: Cut syslog messages after the first '\0'

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Certain messages from DCP contain NUL bytes in the random data after the
NUL terminated syslog message. Since the syslog message ends with '\n'
this results in a dev_info() message terminated with two newlines and an
empty printed line in the kernel log.

Signed-off-by: Janne Grunau <j@jannau.net>
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Link: https://lore.kernel.org/r/20250226-apple-soc-misc-v2-4-c3ec37f9021b@svenpeter.dev
Signed-off-by: Sven Peter <sven@svenpeter.dev>
This commit is contained in:
Janne Grunau 2025-02-26 19:00:06 +00:00 committed by Sven Peter
parent 22af2fac88
commit e210227f02
1 changed files with 1 additions and 1 deletions
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2
drivers/soc/apple/rtkit.c
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@ -477,7 +477,7 @@ static void apple_rtkit_syslog_rx_log(struct apple_rtkit *rtk, u64 msg)
log_context[sizeof(log_context) - 1] = 0;
msglen = rtk->syslog_msg_size - 1;
msglen = strnlen(rtk->syslog_msg_buffer, rtk->syslog_msg_size - 1);
while (msglen > 0 &&
should_crop_syslog_char(rtk->syslog_msg_buffer[msglen - 1]))
msglen--;