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

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* Kun Hu <huk23@xxxxxxxxxxxxxx> [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?

Thanks,
Liam

[1] https://lore.kernel.org/all/20241206215229.244413-1-lorenzo.stoakes@xxxxxxxxxx/T/




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