Subject: [Bug 204819] KASAN still got problems loading some modules at boot

From: [email-masked]
Date: Mon, 16 Sep 2019 11:32:23 +0000

https://bugzilla.kernel.org/show_bug.cgi?id=204819

--- Comment #23 from Christophe Leroy ([email-masked]) ---
Thanks. The third one is interesting, as it shows :

Sep 16 12:57:39 T600 kernel: BUG: Unable to handle kernel data access at
0xfe295404

0xfe295000-0xfe295fff  0x00d05000         4K  user  r        present           
      accessed                         

So unlike the other cases, this one shows that the area is still read-only and
pointing to the zero shadow area.
Wondering whether for the other ones the area is not allocated to a further
module loader after the failing one.

Are you able to dump kernel_page_tables just after each module load failure
before loading any additional module ?

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