bcachefs: Fix integer overflow in bch2_disk_reservation_get()

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The sectors argument shouldn't have been a u32 - it can be up to U32_MAX
(i.e. fallocate creating persistent reservations), and if replication is
enabled we'll overflow when we calculate the real number of sectors to
reserve. Oops.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

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Kent Overstreet 2021-01-17 13:19:16 -05:00 • committed by Kent Overstreet

parent 280249b9d9

commit cd9f3dfe58

2 changed files with 4 additions and 5 deletions

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fs/bcachefs/buckets.c

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7

fs/bcachefs/buckets.h

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