https://bugzilla.kernel.org/show_bug.cgi?id=204479
Erhard F. (erhar...@mailbox.org) changed:
What|Removed |Added
Status|NEW |RESOLVED
https://bugzilla.kernel.org/show_bug.cgi?id=204479
Erhard F. (erhar...@mailbox.org) changed:
What|Removed |Added
Attachment #284271|0 |1
is obsolete|
https://bugzilla.kernel.org/show_bug.cgi?id=204479
--- Comment #20 from Erhard F. (erhar...@mailbox.org) ---
(In reply to Christophe Leroy from comment #18)
> Two possibilities, either the value in .rodata.cst16 is wrong or the stack
> gets corrupted.
>
> Maybe you could try disabling KASAN in
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--- Comment #19 from Erhard F. (erhar...@mailbox.org) ---
Created attachment 284355
--> https://bugzilla.kernel.org/attachment.cgi?id=284355=edit
dmesg (kernel 5.3-rc4 + shadow patch + parallel patch, PowerMac G4 DP)
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--- Comment #18 from Christophe Leroy (christophe.le...@c-s.fr) ---
The Oops occurs at 0x3c8:
3b0: 81 21 00 88 lwz r9,136(r1)
3b4: 13 67 dc c4 vxorv27,v7,v27
3b8: 7d 11 a8 ce lvx v8,r17,r21
3bc: 11 5f 5b 06
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--- Comment #17 from Christophe Leroy (christophe.le...@c-s.fr) ---
Created attachment 284343
--> https://bugzilla.kernel.org/attachment.cgi?id=284343=edit
Disassembly of lib/raid6/altivec8.o
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--- Comment #16 from Erhard F. (erhar...@mailbox.org) ---
Created attachment 284309
--> https://bugzilla.kernel.org/attachment.cgi?id=284309=edit
dmesg (kernel 5.3-rc3 + debug patch + shadow patch + parallel patch, PowerMac
G4 DP)
Also tested
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--- Comment #15 from Christophe Leroy (christophe.le...@c-s.fr) ---
As far as I can see in the latest dmesg, the Oops occurs in raid6 pq module.
An this time it is not anymore in kasan register global.
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--- Comment #14 from Erhard F. (erhar...@mailbox.org) ---
Created attachment 284303
--> https://bugzilla.kernel.org/attachment.cgi?id=284303=edit
dmesg (kernel 5.3-rc3 + patch + 2nd patch, without CONFIG_SMP, v2, PowerMac G4
DP)
However the
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--- Comment #13 from Erhard F. (erhar...@mailbox.org) ---
Created attachment 284301
--> https://bugzilla.kernel.org/attachment.cgi?id=284301=edit
dmesg (kernel 5.3-rc3 + patch + 2nd patch, without CONFIG_SMP, PowerMac G4 DP)
Definitely an
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--- Comment #12 from Christophe Leroy (christophe.le...@c-s.fr) ---
Patch at https://patchwork.ozlabs.org/patch/1144756/
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--- Comment #11 from Christophe Leroy (christophe.le...@c-s.fr) ---
Thanks. Then it is not about SMP allthough there's anyway a theoritical problem
with SMP that's I'll address in another patch.
I think I finally spotted the issue. Let's take
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--- Comment #10 from Erhard F. (erhar...@mailbox.org) ---
Created attachment 284297
--> https://bugzilla.kernel.org/attachment.cgi?id=284297=edit
dmesg (kernel 5.3-rc3 + patch, without CONFIG_SMP, PowerMac G4 DP)
Here's the dmesg with the
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--- Comment #9 from Christophe Leroy (christophe.le...@c-s.fr) ---
The module loads seems to be nested. It might then be an SMP issue,
kasan_init_region() is most likely not SMP safe.
Could you test without CONFIG_SMP or with only one CPU ?
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--- Comment #8 from Christophe Leroy (christophe.le...@c-s.fr) ---
List of allocated areas with associated kasan shadow area in [ ], together with
the addresses when shadow initialisation fails:
Aug 08 23:39:58 T600 kernel: ##
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Erhard F. (erhar...@mailbox.org) changed:
What|Removed |Added
Attachment #284175|0 |1
is obsolete|
https://bugzilla.kernel.org/show_bug.cgi?id=204479
--- Comment #6 from Erhard F. (erhar...@mailbox.org) ---
(In reply to Christophe Leroy from comment #4)
> We need to identify if the allocation of KASAN shadow area at module
> allocation fails, or if kasan accesses outside of the allocated area.
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Erhard F. (erhar...@mailbox.org) changed:
What|Removed |Added
Attachment #284177|0 |1
is obsolete|
https://bugzilla.kernel.org/show_bug.cgi?id=204479
--- Comment #4 from Christophe Leroy (christophe.le...@c-s.fr) ---
We need to identify if the allocation of KASAN shadow area at module allocation
fails, or if kasan accesses outside of the allocated area.
Could you please run again with the
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--- Comment #3 from Erhard F. (erhar...@mailbox.org) ---
Yes, at least one usb driver is also affected.
Also radeon.ko sometimes loads ok, sometimes it stalls:
# modprobe -v radeon
insmod
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Christophe Leroy (christophe.le...@c-s.fr) changed:
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Erhard F. (erhar...@mailbox.org) changed:
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