[Bug 219504] iomap/buffered-io/XFS crashes with kernel Version > 6.1.91. Perhaps Changes in kernel 6.1.92 (and up) for XFS/iomap causing the problems?

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=219504

--- Comment #4 from marco.nelissen@gmail.com ---
I think this might be the same problem I'm running in to, which only seems
to happen on 32-bit kernels, starting with commit f43dc4dc3eff0.
Problem is still present in 6.13.

Easy repro steps are as follows:

hash mkfs.xfs || apt install -y xfsprogs
rm -f xfsimg.bin
truncate -s 6G xfsimg.bin  # I can reproduce this with an xfs image, but not
with ext4
mkfs.xfs xfsimg.bin
mkdir -p xfs
mount xfsimg.bin xfs
truncate -s 5G xfs/diskimg.bin
mkfs.ext4 xfs/diskimg.bin  # this can probably be any fs type, it happens with
fat too
mkdir -p mnt
mount xfs/diskimg.bin mnt
dd if=/dev/zero of=mnt/file.bin bs=1M of=mnt/file.bin bs=1M

The above almost immediately prints a warning to the kernel log, after
which there is a kworker thread hogging the CPU

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