Re: KMSAN: uninit-value in af_alg_free_areq_sgls

Dmitry Vyukov
2018-07-06T07:39:08Z

On Thu, Jul 5, 2018 at 8:45 PM, Stephan Müller <smueller@chronox.de> wrote:
> Am Donnerstag, 5. Juli 2018, 19:02:01 CEST schrieb syzbot:
>
> Hi Dimitry,
>
> does the syzkaller somehow uses the "---" separator as part of the URL?

It used it as branch. Please see:

https://github.com/google/syzkaller/blob/master/docs/syzbot.md#testing-patches

for formats. In all formats a git tree is not enough. And it is not
enough to identify code state in any other context too, it's always
git repo + branch or commit hash.

>> syzbot tried to test the proposed patch but build/boot failed:
>>
>> failed to checkout kernel repo https://github.com/google/kmsan.git/---:
>> failed to run /usr/bin/git [git fetch https://github.com/google/kmsan.git
>> ---]: exit status 129
>> error: unknown option `-'
>> usage: git fetch [<options>] [<repository> [<refspec>...]]
>> or: git fetch [<options>] <group>
>> or: git fetch --multiple [<options>] [(<repository> | <group>)...]
>> or: git fetch --all [<options>]
>>
>> -v, --verbose be more verbose
>> -q, --quiet be more quiet
>> --all fetch from all remotes
>> -a, --append append to .git/FETCH_HEAD instead of overwriting
>> --upload-pack <path> path to upload pack on remote end
>> -f, --force force overwrite of local branch
>> -m, --multiple fetch from multiple remotes
>> -t, --tags fetch all tags and associated objects
>> -n do not fetch all tags (--no-tags)
>> -p, --prune prune remote-tracking branches no longer on
>> remote --recurse-submodules[=<on-demand>]
>> control recursive fetching of submodules
>> --dry-run dry run
>> -k, --keep keep downloaded pack
>> -u, --update-head-ok allow updating of HEAD ref
>> --progress force progress reporting
>> --depth <depth> deepen history of shallow clone
>> --unshallow convert to a complete repository
>> --update-shallow accept refs that update .git/shallow
>> --refmap <refmap> specify fetch refmap
>>
>>
>>
>>
>> Tested on:
>>
>> commit: [unknown]
>> git tree: https://github.com/google/kmsan.git/---> compiler: clang version 7.0.0 (trunk 334104)
>> patch: https://syzkaller.appspot.com/x/patch.diff?x=1207511c400000
>
>
> Ciao
> Stephan
>
>
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