Re: [syzbot] [mm?] KASAN: slab-use-after-free Read in __mmap_region

[Fudam <huk23@m.fudan.edu.cn>]

> 在 2025年1月17日，03:29，Liam R. Howlett <Liam.Howlett@oracle.com> 写道：
> 
> * Liam R. Howlett <Liam.Howlett@oracle.com> [241224 11:35]:
>> * Kun Hu <huk23@m.fudan.edu.cn> [241224 07:13]:
>>> Hello,
>>> 
>>> When using fuzzer tool to fuzz the latest Linux kernel, the following crash
>>> was triggered.
>>> 
>>> HEAD commit: 78d4f34e2115b517bcbfe7ec0d018bbbb6f9b0b8
>>> git tree: upstream
>>> Console output: https://drive.google.com/file/d/1_GxT_B3JkCE8Q6r6PGgG27uNn5cgzZm3/view?usp=sharing
>>> Kernel config: https://drive.google.com/file/d/1RhT5dFTs6Vx1U71PbpenN7TPtnPoa3NI/view?usp=sharing
>>> C reproducer: https://drive.google.com/file/d/1zyZSM-hp1UInnE-AA9J3NXmMCV7DCqgf/view?usp=sharing
>>> Syzlang reproducer: https://drive.google.com/file/d/1W0yvbKYi6GaAaG0YNeDVacN3eEa8rxot/view?usp=sharing
>>> 
>>> We are triggering the same issue and I hope this information is useful to you. If you fix this issue, please let me know.
>> 
>> The fix is on its way upstream. [1]
>> 
>> It is on the dashboard page of the syzbot report you are responding
>> to...
>> 
>> It specifies the closes and reported-by in the commit.
>> 
>> Are you saying it happens with this fix or did you not test the fix?
> 
> Anything?
Sorry for late, we’ve tested this issue for multiple rounds on v6.13-rc7 and failed to reproduce the crash we reported.

————
Thanks,
Kun 
> 
>> 
>> Thanks,
>> Liam
>> 
>> [1] https://lore.kernel.org/all/20241206215229.244413-1-lorenzo.stoakes@oracle.com/T/
>