On Wed, 17 Nov 2021 08:50:15 -0800, Harshad Shirwadkar wrote:

From: Harshad Shirwadkar <redacted>

At the end of a fast commit replay, e2fsck tries merging extents in a
inode. This patch fixes a bug in this logic where we were continuing
this action even if there were no extents to merge resulting in
accessing illegal memory.

[...]

Applied, thanks!

[1/1] e2fsck: skip sorting extents if there are no valid extents
      commit: 54183fea07676d185b2c169c45a7c1adc7e3e26e

Best regards,
-- 
Theodore Ts'o [off-list ref]