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Change History

In the Linux kernel, the following vulnerability has been resolved:

fs/writeback: skip AS_NO_DATA_INTEGRITY mappings in wait_sb_inodes()

Above the while() loop in wait_sb_inodes(), we document that we must wait
for all pages under writeback for data integrity.  Consequently, if a
mapping, like fuse, traditionally does not have data integrity semantics,
there is no need to wait at all; we can simply skip these inodes.

This restores fuse back to prior behavior where syncs are no-ops.  This
fixes a user regression where if a system is running a faulty fuse server
that does not reply to issued write requests, this causes wait_sb_inodes()
to wait forever.

https://git.kernel.org/stable/c/3f4ed5e2b8f111553562507ad6202432c7c57731

https://git.kernel.org/stable/c/f9a49aa302a05e91ca01f69031cb79a0ea33031f