bcachefs: fix overflow in fiemap

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filefrag (and potentially other utilities that call fiemap) sometimes
pass ULONG_MAX as the length.  fiemap_prep clamps excessively large
lengths - but the calculation of end can overflow if it occurs before
calling fiemap_prep.  When this happens, filefrag assumes it has read to
the end and exits.

Signed-off-by: Reed Riley <reed@riley.engineer>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

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Reed Riley 2024-05-04 22:12:23 +00:00 • committed by Kent Overstreet

parent db42549d40

commit 9a0ec04511

1 changed files with 1 additions and 1 deletions

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fs/bcachefs/fs.c

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