ext4: add sanity checking to count_overhead()

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commit c48ae41baf upstream.

The commit "ext4: sanity check the block and cluster size at mount
time" should prevent any problems, but in case the superblock is
modified while the file system is mounted, add an extra safety check
to make sure we won't overrun the allocated buffer.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

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Theodore Ts'o 2016-11-18 13:37:47 -05:00 • committed by Ben Hutchings

parent 6191bec707

commit 0a295bf1d1

1 changed files with 8 additions and 3 deletions

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fs/ext4/super.c

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