** Description changed:
[Impact]
Microsoft has asked us to backport commit 7e043a80b5da ("netfs: Fix
missing xas_retry() calls in xarray iteration") to the 5.15 Azure
kernel.
[Fix]
Backported to the J:azure tree.
[Test plan]
Build tested only; Microsoft will test the bug fix.
[Where problems could occur]
Due to the significant delta between the Jammy 5.15 tree and commit
7e043a80b5da, particularly w.r.t. fs/netfs/read_helper.c, that got split
into multiple files in 5.17, as well as the change that introduced the
usage of folios in netfslib, a manual backported was required. The
changes, however, were relatively simple/self-contained, and as such
this presents a medium regression risk. Any issues with this patch could
manifest as either a null pointer dereference in
netfs_rreq_unlock/netfs_rreq_unmark_after_write, or potentially as a
hung thread when doing a lot of I/O on an netfs filesystem.
+
+ [Other info]
+ SF #00406192
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https://bugs.launchpad.net/bugs/2098534
Title:
azure: backport "netfs: Fix missing xas_retry() calls in xarray
iteration"
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