Andy Shevchenko e14f68a48f serial: 8250_port: Check IRQ data before use ... commit cce7fc8b29 upstream. In case the leaf driver wants to use IRQ polling (irq = 0) and IIR register shows that an interrupt happened in the 8250 hardware the IRQ data can be NULL. In such a case we need to skip the wake event as we came to this path from the timer interrupt and quite likely system is already awake. Without this fix we have got an Oops: serial8250: ttyS0 at I/O 0x3f8 (irq = 0, base_baud = 115200) is a 16550A ... BUG: kernel NULL pointer dereference, address: 0000000000000010 RIP: 0010:serial8250_handle_irq+0x7c/0x240 Call Trace: ? serial8250_handle_irq+0x7c/0x240 ? __pfx_serial8250_timeout+0x10/0x10 Fixes: 0ba9e3a13c ("serial: 8250: Add missing wakeup event reporting") Cc: stable <stable@kernel.org> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com> Link: https://lore.kernel.org/r/20230831222555.614426-1-andriy.shevchenko@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-10-06 14:57:01 +02:00
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hvc	…
ipwireless	…
serdev	…
serial	serial: 8250_port: Check IRQ data before use	2023-10-06 14:57:01 +02:00
vt	…
Kconfig	…
Makefile	…
amiserial.c	…
ehv_bytechan.c	…
goldfish.c	…
mips_ejtag_fdc.c	…
moxa.c	…
mxser.c	…
n_gsm.c	Revert "tty: n_gsm: fix UAF in gsm_cleanup_mux"	2023-10-06 14:57:00 +02:00
n_hdlc.c	…
n_null.c	…
n_tty.c	tty: fix hang on tty device with no_room set	2023-08-03 10:23:53 +02:00
nozomi.c	…
pty.c	…
rpmsg_tty.c	…
synclink_gt.c	…
sysrq.c	…
tty.h	…
tty_audit.c	…
tty_baudrate.c	…
tty_buffer.c	…
tty_io.c	…
tty_ioctl.c	…
tty_jobctrl.c	…
tty_ldisc.c	…
tty_ldsem.c	…
tty_mutex.c	…
tty_port.c	…
ttynull.c	…
vcc.c	…