ext4: add missing validation of fast-commit record lengths

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commit 64b4a25c3d upstream.

Validate the inode and filename lengths in fast-commit journal records
so that a malicious fast-commit journal cannot cause a crash by having
invalid values for these.  Also validate EXT4_FC_TAG_DEL_RANGE.

Fixes: aa75f4d3da ("ext4: main fast-commit commit path")
Cc: <stable@vger.kernel.org> # v5.10+
Signed-off-by: Eric Biggers <ebiggers@google.com>
Link: https://lore.kernel.org/r/20221106224841.279231-5-ebiggers@kernel.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Eric Biggers 2022-11-06 14:48:38 -08:00 • committed by Greg Kroah-Hartman

parent 1ba993208b

commit d1c97077fa

2 changed files with 20 additions and 20 deletions

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38

fs/ext4/fast_commit.c

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2

fs/ext4/fast_commit.h

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