From: Kristian <kbx@posteo.de>
To: xfs@oss.sgi.com
Subject: Integer truncation in fs/xfs/libxfs/xfs_da_btree.c
Date: Sun, 20 Dec 2015 13:36:22 +0100 [thread overview]
Message-ID: <5676A0C6.9000407@posteo.de> (raw)
Hello,
there is an integer truncation in
fs/xfs/libxfs/xfs_da_btree.c +2081
/* account for newly allocated blocks in reserved blocks total */
args->total -= dp->i_d.di_nblocks - nblks;
with the types: uint32 -= uint64 - uint64
On a hardened kernel with grsecurity enabled, this leads to a fault.
https://forums.grsecurity.net/viewtopic.php?f=3&t=4346&sid=3200600c0faaab4bf8779a95c549a737
Is this intentional and safe?
Regards
Kristian
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next reply other threads:[~2015-12-20 12:36 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-20 12:36 Kristian [this message]
2015-12-20 19:29 ` Integer truncation in fs/xfs/libxfs/xfs_da_btree.c Dave Chinner
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