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? thanks, greg k-h
