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2024-12-19 9370bb92b2d16684ee45cf24e879c93c509162da

 kernel/fs/ext4/fsmap.c
.. .. @@ -486,6 +486,8 @@
486 486  		keys[0].fmr_physical = bofs;
487 487  	if (keys[1].fmr_physical >= eofs)
488 488  		keys[1].fmr_physical = eofs - 1;
489 +	if (keys[1].fmr_physical < keys[0].fmr_physical)
490 +		return 0;
489 491  	start_fsb = keys[0].fmr_physical;
490 492  	end_fsb = keys[1].fmr_physical;
491 493

..	..	@@ -486,6 +486,8 @@
486	486	keys[0].fmr_physical = bofs;
487	487	if (keys[1].fmr_physical >= eofs)
488	488	keys[1].fmr_physical = eofs - 1;
	489	+ if (keys[1].fmr_physical < keys[0].fmr_physical)
	490	+ return 0;
489	491	start_fsb = keys[0].fmr_physical;
490	492	end_fsb = keys[1].fmr_physical;
491	493