Oliver Neukum 61c12c72b1 USB: class: CDC-ACM: fix race between get_serial and set_serial ...

commit b41c1fa155 upstream.

TIOCGSERIAL is an ioctl. Thus it must be atomic. It returns
two values. Racing with set_serial it can return an inconsistent
result. The mutex must be taken.

In terms of logic the bug is as old as the driver. In terms of
code it goes back to the conversion to the get_serial and
set_serial methods.

Signed-off-by: Oliver Neukum <oneukum@suse.com>
Cc: stable <stable@kernel.org>
Fixes: 99f75a1fcd ("cdc-acm: switch to ->[sg]et_serial()")
Link: https://lore.kernel.org/r/20240912141916.1044393-1-oneukum@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2024-10-17 15:08:00 +02:00

..

cdc-acm.c

USB: class: CDC-ACM: fix race between get_serial and set_serial

2024-10-17 15:08:00 +02:00

cdc-acm.h

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cdc-wdm.c

USB: class: cdc-wdm: Fix CPU lockup caused by excessive log messages

2024-07-05 09:12:25 +02:00

Kconfig

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Makefile

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usblp.c

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usbtmc.c

USB: usbtmc: prevent kernel-usb-infoleak

2024-10-17 15:07:38 +02:00