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Bug#993641: linux: enable 64-bit tmpfs inode allocation



Source: linux
Version: 5.10.46-4
Severity: normal
Tags: patch
X-Debbugs-Cc: hlieberman@debian.org

Hello Kernel maintainers,

Due to a bug in tmpfs handling of inodes, it's possible to run into inode
collisions on heavily loaded tmpfs filesystems. This problem is described in
detail in
https://chrisdown.name/2021/07/02/tmpfs-inode-corruption-introducing-inode64.html
and has been applied by default in Arch.

Considering the potential for extremely hard to track failures and the fact that
this has been widely deployed already, I suggest that we enable
CONFIG_TMPFS_INODE64 by default.

I will be making an MR in Gitlab to this effect.

Sincerely,

--
Harlan Lieberman-Berg
~hlieberman


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