Matt Johnston ec36815215 net: mctp-serial: Fix missing escapes on transmit ... commit f962e8361a upstream. 0x7d and 0x7e bytes are meant to be escaped in the data portion of frames, but this didn't occur since next_chunk_len() had an off-by-one error. That also resulted in the final byte of a payload being written as a separate tty write op. The chunk prior to an escaped byte would be one byte short, and the next call would never test the txpos+1 case, which is where the escaped byte was located. That meant it never hit the escaping case in mctp_serial_tx_work(). Example Input: 01 00 08 c8 7e 80 02 Previous incorrect chunks from next_chunk_len(): 01 00 08 c8 7e 80 02 With this fix: 01 00 08 c8 7e 80 02 Cc: stable@vger.kernel.org Fixes: a0c2ccd9b5 ("mctp: Add MCTP-over-serial transport binding") Signed-off-by: Matt Johnston <matt@codeconstruct.com.au> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2024-09-12 11:11:28 +02:00
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Kconfig	mctp i2c: MCTP I2C binding driver	2022-02-19 16:18:49 +00:00
Makefile	mctp i2c: MCTP I2C binding driver	2022-02-19 16:18:49 +00:00
mctp-i2c.c	mctp i2c: Switch back to use struct i2c_driver's .probe()	2023-06-13 20:46:20 -07:00
mctp-serial.c	net: mctp-serial: Fix missing escapes on transmit	2024-09-12 11:11:28 +02:00