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31352811e1
linux/drivers/tty
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Ilpo Järvinen 31352811e1 serial: 8250_dma: Fix DMA Rx completion race 
__dma_rx_complete() is called from two places:
  - Through the DMA completion callback dma_rx_complete()
  - From serial8250_rx_dma_flush() after IIR_RLSI or IIR_RX_TIMEOUT
The former does not hold port's lock during __dma_rx_complete() which
allows these two to race and potentially insert the same data twice.

Extend port's lock coverage in dma_rx_complete() to prevent the race
and check if the DMA Rx is still pending completion before calling
into __dma_rx_complete().

Reported-by: Gilles BULOZ <gilles.buloz@kontron.com>
Tested-by: Gilles BULOZ <gilles.buloz@kontron.com>
Fixes: 9ee4b83e51 ("serial: 8250: Add support for dmaengine")
Cc: stable@vger.kernel.org
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20230130114841.25749-2-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-01-31 11:15:16 +01:00
..
hvc xen: branch for v6.2-rc4 2023-01-12 17:02:20 -06:00
ipwireless
serdev tty: Replace acpi_bus_get_device() 2022-01-31 14:30:06 +01:00
serial serial: 8250_dma: Fix DMA Rx completion race 2023-01-31 11:15:16 +01:00
vt Merge 6.0-rc4 into tty-next 2022-09-05 07:59:28 +02:00
amiserial.c tty: Make ->set_termios() old ktermios const 2022-08-30 14:22:35 +02:00
ehv_bytechan.c tty: evh_bytechan: Replace NO_IRQ by 0 2022-11-02 08:10:42 +01:00
goldfish.c tty: goldfish: Fix free_irq() on remove 2022-06-10 13:31:31 +02:00
Kconfig tty: Allow TIOCSTI to be disabled 2022-11-03 01:58:03 +01:00
Makefile tty: add rpmsg driver 2021-10-21 12:35:35 +02:00
mips_ejtag_fdc.c serial: Convert SERIAL_XMIT_SIZE to UART_XMIT_SIZE 2022-06-27 14:41:31 +02:00
moxa.c tty: Make ->set_termios() old ktermios const 2022-08-30 14:22:35 +02:00
mxser.c tty: mxser: remove redundant assignment to hwid 2022-09-01 17:59:36 +02:00
n_gsm.c treewide: Convert del_timer*() to timer_shutdown*() 2022-12-25 13:38:09 -08:00
n_hdlc.c tty: n_hdlc: remove HDLC_MAGIC 2022-09-22 16:12:34 +02:00
n_null.c
n_tty.c n_tty: Rename tail to old_tail in n_tty_read() 2022-11-22 17:51:34 +01:00
nozomi.c
pty.c tty: Make ->set_termios() old ktermios const 2022-08-30 14:22:35 +02:00
rpmsg_tty.c tty: rpmsg: Fix race condition releasing tty port 2022-01-26 14:50:26 +01:00
synclink_gt.c tty: synclink_gt: unwind actions in error path of net device open 2022-11-22 17:52:57 +01:00
sysrq.c treewide: Convert del_timer*() to timer_shutdown*() 2022-12-25 13:38:09 -08:00
tty_audit.c
tty_baudrate.c tty: Fix comment style in tty_termios_input_baud_rate() 2022-08-30 14:22:34 +02:00
tty_buffer.c tty: Convert tty_buffer flags to bool 2022-11-09 13:02:16 +01:00
tty_io.c Driver Core changes for 6.2-rc1 2022-12-16 03:54:54 -08:00
tty_ioctl.c termios: start unifying non-UAPI parts of asm/termios.h 2022-09-09 10:44:34 +02:00
tty_jobctrl.c signal: Replace __group_send_sig_info with send_signal_locked 2022-05-11 14:33:17 -05:00
tty_ldisc.c tty: Move sysctl setup into "core" tty logic 2022-11-03 01:58:03 +01:00
tty_ldsem.c tty/ldsem: Fix syntax errors in comments 2021-12-21 09:15:49 +01:00
tty_mutex.c tty: remove TTY_MAGIC 2022-09-22 16:12:34 +02:00
tty_port.c tty: Implement lookahead to process XON/XOFF timely 2022-06-10 13:51:31 +02:00
tty.h tty: Move sysctl setup into "core" tty logic 2022-11-03 01:58:03 +01:00
ttynull.c
vcc.c termios: start unifying non-UAPI parts of asm/termios.h 2022-09-09 10:44:34 +02:00