Matthias Kaehlcke 9c05084cb5 tty: serial: qcom_geni_serial: Fix wrap around of TX buffer ... [ Upstream commit 3c66eb4ba1 ] Before commit a1fee899e5 ("tty: serial: qcom_geni_serial: Fix softlock") the size of TX transfers was limited to the TX FIFO size, and wrap arounds of the UART circular buffer were split into two transfers. With the commit wrap around are allowed within a transfer. The TX FIFO of the geni serial port uses a word size of 4 bytes. In case of a circular buffer wrap within a transfer the driver currently may write an incomplete word to the FIFO, with some bytes containing data from the circular buffer and others being zero. Since the transfer isn't completed yet the zero bytes are sent as if they were actual data. Handle wrap arounds of the TX buffer properly and ensure that words written to the TX FIFO always contain valid data (unless the transfer is completed). Fixes: a1fee899e5 ("tty: serial: qcom_geni_serial: Fix softlock") Signed-off-by: Matthias Kaehlcke <mka@chromium.org> Reviewed-by: Evan Green <evgreen@chromium.org> Tested-by: Ryan Case <ryandcase@chromium.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2020-05-27 17:37:41 +02:00
..
hvc	tty: hvc: fix buffer overflow during hvc_alloc().	2020-04-29 16:31:30 +02:00
ipwireless	tty: ipwireless: Fix potential NULL pointer dereference	2020-01-27 14:50:16 +01:00
serdev	serdev: ttyport: restore client ops on deregistration	2020-02-28 16:38:49 +01:00
serial	tty: serial: qcom_geni_serial: Fix wrap around of TX buffer	2020-05-27 17:37:41 +02:00
vt	vt: fix unicode console freeing with a common interface	2020-05-14 07:57:17 +02:00
amiserial.c
cyclades.c
ehv_bytechan.c	tty: evh_bytechan: Fix out of bounds accesses	2020-04-23 10:30:23 +02:00
goldfish.c
isicom.c
Kconfig
Makefile
mips_ejtag_fdc.c
moxa.c
moxa.h
mxser.c
mxser.h
n_gsm.c
n_hdlc.c	tty: Don't block on IO when ldisc change is pending	2019-12-13 08:52:28 +01:00
n_null.c
n_r3964.c	tty: Don't block on IO when ldisc change is pending	2019-12-13 08:52:28 +01:00
n_tracerouter.c
n_tracesink.c
n_tracesink.h
n_tty.c	tty: Don't block on IO when ldisc change is pending	2019-12-13 08:52:28 +01:00
nozomi.c
pty.c	pty: fix compat ioctls	2019-12-01 09:16:16 +01:00
rocket_int.h
rocket.c	tty: rocket, avoid OOB access	2020-04-29 16:31:30 +02:00
rocket.h
synclink_gt.c	tty: synclink_gt: Adjust indentation in several functions	2020-02-24 08:34:47 +01:00
synclink.c
synclinkmp.c	tty: synclinkmp: Adjust indentation in several functions	2020-02-24 08:34:47 +01:00
sysrq.c	sysrq: Remove duplicated sysrq message	2020-03-05 16:42:15 +01:00
tty_audit.c
tty_baudrate.c
tty_buffer.c
tty_io.c
tty_ioctl.c
tty_jobctrl.c
tty_ldisc.c	tty: Don't block on IO when ldisc change is pending	2019-12-13 08:52:28 +01:00
tty_ldsem.c
tty_mutex.c
tty_port.c	serdev: ttyport: restore client ops on deregistration	2020-02-28 16:38:49 +01:00
vcc.c