https://bugzilla.kernel.org/show_bug.cgi?id=204479
Erhard F. (erhar...@mailbox.org) changed:
What|Removed |Added
Status|NEW |RESOLVED
Resol
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is obsolete|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 li
https://bugzilla.kernel.org/show_bug.cgi?id=204479
--- Comment #19 from Erhard F. (erhar...@mailbox.org) ---
Created attachment 284355
--> https://bugzilla.kernel.org/attachment.cgi?id=284355&action=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
https://bugzilla.kernel.org/show_bug.cgi?id=204479
--- Comment #17 from Christophe Leroy (christophe.le...@c-s.fr) ---
Created attachment 284343
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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&action=edit
dmesg (kernel 5.3-rc3 + debug patch + shadow patch + parallel patch, PowerMac
G4 DP)
Also t
https://bugzilla.kernel.org/show_bug.cgi?id=204479
--- 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&action=edit
dmesg (kernel 5.3-rc3 + patch + 2nd patch, without CONFIG_SMP, v2, PowerMac G4
DP)
However
https://bugzilla.kernel.org/show_bug.cgi?id=204479
--- Comment #13 from Erhard F. (erhar...@mailbox.org) ---
Created attachment 284301
--> https://bugzilla.kernel.org/attachment.cgi?id=284301&action=edit
dmesg (kernel 5.3-rc3 + patch + 2nd patch, without CONFIG_SMP, PowerMac G4 DP)
Definitely a
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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 the
https://bugzilla.kernel.org/show_bug.cgi?id=204479
--- Comment #10 from Erhard F. (erhar...@mailbox.org) ---
Created attachment 284297
--> https://bugzilla.kernel.org/attachment.cgi?id=284297&action=edit
dmesg (kernel 5.3-rc3 + patch, without CONFIG_SMP, PowerMac G4 DP)
Here's the dmesg with th
https://bugzilla.kernel.org/show_bug.cgi?id=204479
--- 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: ## module_alloc(c7
https://bugzilla.kernel.org/show_bug.cgi?id=204479
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.
https://bugzilla.kernel.org/show_bug.cgi?id=204479
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 belo
https://bugzilla.kernel.org/show_bug.cgi?id=204479
--- 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 /lib/modules/5.3.0-rc2+/kernel/drivers/i2c/algos/i2c-algo-
https://bugzilla.kernel.org/show_bug.cgi?id=204479
Christophe Leroy (christophe.le...@c-s.fr) changed:
What|Removed |Added
CC||christophe.le
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Erhard F. (erhar...@mailbox.org) changed:
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CC||linuxppc-dev@lists.ozla
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