jfs: fix array-index-out-of-bounds read in add_missing_indices

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[ Upstream commit 5dff41a863 ]

stbl is s8 but it must contain offsets into slot which can go from 0 to
127.

Added a bound check for that error and return -EIO if the check fails.
Also make jfs_readdir return with error if add_missing_indices returns
with an error.

Reported-by: syzbot+b974bd41515f770c608b@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com./bug?extid=b974bd41515f770c608b
Signed-off-by: Aditya Dutt <duttaditya18@gmail.com>
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Aditya Dutt 2025-04-01 20:59:16 +05:30 • committed by Greg Kroah-Hartman

parent e3bb0c5a30

commit 44618bee30

1 changed files with 15 additions and 3 deletions

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fs/jfs/jfs_dtree.c

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