syzkaller report for what looks from a quick look like a NULL deref (which ASAN turns into non-canonical address deref), causing #SS because RBP is used: https://syzkaller.appspot.com/bug?id=9fb65ba4c602893421df0d36b0e2d52453af573a …
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If you get creative and dereference for executing maybe u can get a
#UD in some cases? -
Oh, huh, interesting. I was only thinking of plain MOV and such...
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Four — you can get an alignment fault :)
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I'm amused we keep finding new&new ways how kernel can crash (lots of that is just "oh, I decided to use this custom format string over here") Parsing logic: https://github.com/google/syzkaller/blob/master/pkg/report/linux.go#L892-L1661 … and the test cases: https://github.com/google/syzkaller/tree/master/pkg/report/testdata/linux/report … are one of the most valuable things in syzkaller.
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