>>>>> "Greg" == Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> writes: > On Tue, Oct 10, 2023 at 08:19:48AM +0200, Peter Korsgaard wrote: >> >>>>> "Greg" == Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> writes: >> >> > On Tue, Oct 10, 2023 at 12:26:14AM +0200, Javier Carrasco wrote: >> >> syzbot has found an uninit-value bug triggered by the dm9601 driver [1]. >> >> >> >> This error happens because the variable res is not updated if the call >> >> to dm_read_shared_word returns an error. In this particular case -EPROTO >> >> was returned and res stayed uninitialized. >> >> >> >> This can be avoided by checking the return value of dm_read_shared_word >> >> and propagating the error if the read operation failed. >> >> >> >> [1] https://syzkaller.appspot.com/bug?extid=1f53a30781af65d2c955 >> >> >> >> Signed-off-by: Javier Carrasco <javier.carrasco.cruz@xxxxxxxxx> >> >> Reported-and-tested-by: syzbot+1f53a30781af65d2c955@xxxxxxxxxxxxxxxxxxxxxxxxx >> >> --- >> >> Changes in v2: >> >> - Remove unnecessary 'err == 0' case >> >> - Link to v1: https://lore.kernel.org/r/20231009-topic-dm9601_uninit_mdio_read-v1-1-d4d775e24e3b@xxxxxxxxx >> >> --- >> >> drivers/net/usb/dm9601.c | 7 ++++++- >> >> 1 file changed, 6 insertions(+), 1 deletion(-) >> >> > What commit id does this fix? >> >> It has been there since the beginning, so: >> >> Fixes: d0374f4f9c35cdfbee0 ("USB: Davicom DM9601 usbnet driver") >> >> Acked-by: Peter Korsgaard <peter@xxxxxxxxxxxxx> > Great, can someone add a cc: stable@ tag for this too please? Cc: stable@xxxxxxxxxxxxxxx -- Bye, Peter Korsgaard
