Messages in this thread | | | Subject | Re: [PATCH] tpm: fix potential NULL pointer access in tpm_del_char_device() | From | Jarkko Sakkinen <> | Date | Mon, 13 Sep 2021 23:25:40 +0300 |
| |
On Fri, 2021-09-10 at 20:04 +0200, Lino Sanfilippo wrote: > In tpm_del_char_device() make sure that chip->ops is still valid. > This check is needed since in case of a system shutdown > tpm_class_shutdown() has already been called and set chip->ops to NULL. > This leads to a NULL pointer access as soon as tpm_del_char_device() > tries to access chip->ops in case of TPM 2. > > Fixes: dcbeab1946454 ("tpm: fix crash in tpm_tis deinitialization") > Cc: stable@vger.kernel.org > Signed-off-by: Lino Sanfilippo <LinoSanfilippo@gmx.de> > ---
Have you been able to reproduce this in some environment?
/Jarkko
| |