Messages in this thread | | | From | David Howells <> | Subject | Re: Another regression in the af_alg series (s390x-specific) | Date | Wed, 26 Jul 2023 16:38:32 +0100 |
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Well, I can reproduce it fairly easily. It seems to be:
static inline void scatterwalk_start(struct scatter_walk *walk, struct scatterlist *sg) { walk->sg = sg; walk->offset = sg->offset; <---- }
Presumably sg is rubbish.
Dump of assembler code for function gcm_walk_start: 0x0000000000000038 <+0>: jgnop 0x38 <gcm_walk_start> 0x000000000000003e <+6>: xc 8(64,%r2),8(%r2) 0x0000000000000044 <+12>: st %r4,32(%r2) 0x0000000000000048 <+16>: stg %r3,0(%r2) 0x000000000000004e <+22>: l %r1,8(%r3) 0x0000000000000052 <+26>: st %r1,8(%r2) 0x0000000000000056 <+30>: jg 0x56 <gcm_walk_start+30>
I'm don't know much about s390x assembly, but I'm guessing %r2 has "walk" and %r3 has "sg".
AS:0000000116d50007 R3:0000000000000024 Fault in home space mode while using kernel ASCE. Failing address: 0026070200000000 TEID: 0026070200000803 Unable to handle kernel pointer dereference in virtual kernel address space
Krnl GPRS: 000000000000000c 0000038000000310 00000380002a7938 0026070200000000 0000000000000000 0000000115593cb4 0000000000000000 0000000000000010 0000000100000000 000000017e984690 000000000000000c 0000000000000000 000003ffaf12cf98 0000000000000000 000003ff7fc536ba 00000380002a77e0
I'm not sure what to make of the 0026070200000000.
David
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