ext4: avoid running out of journal credits when appending to an inline file

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Use a separate journal transaction if it turns out that we need to
convert an inline file to use an data block.  Otherwise we could end
up failing due to not having journal credits.

This addresses CVE-2018-10883.

https://bugzilla.kernel.org/show_bug.cgi?id=200071

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org

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This commit is contained in:

Theodore Ts'o 2018-06-16 23:41:59 -04:00

parent e09463f220

commit 8bc1379b82

3 changed files with 3 additions and 57 deletions

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3

fs/ext4/ext4.h

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38

fs/ext4/inline.c

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19

fs/ext4/xattr.c

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