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List:       fuse-devel
Subject:    Re: [fuse-devel] ioctl crashing libfuse on older kernel
From:       Miklos Szeredi <miklos () szeredi ! hu>
Date:       2019-12-04 11:47:48
Message-ID: CAJfpegsMbhsx6SgW_frwDM97wQ=u1x4R9PSmVeQM6gukmFz-gQ () mail ! gmail ! com
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On Sat, Nov 30, 2019 at 7:21 PM Antonio SJ Musumeci <trapexit@spawn.link> wrote:
>
> I've a user who is using OpenVZ 7 w/ kernel version
> 3.10.0-957.12.2.vz7.96.21. When a variable length ioctl call like
> FS_IOC_FIEMAP is made the function fuse_lib_ioctl aborts due to inbufsz
> != outbufsz.

This appears to be a bug in OpenVZ.   Upstream 3.10.0 does not allow
variable length fs ioctls, so the assert in libfuse cannot trigger.

Thanks,
Miklos


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