From: Li Tuo <islituo@gmail.com>
To: shaggy@kernel.org
Cc: jfs-discussion@lists.sourceforge.net,
linux-kernel@vger.kernel.org, baijiaju1990@gmail.com
Subject: [BUG] jfs: possible uninitialized-variable access in xtSplitUp()
Date: Sat, 31 Jul 2021 14:31:02 +0800 [thread overview]
Message-ID: <6b3b3a56-b77c-aff7-c9f1-94a99d4929d2@gmail.com> (raw)
Hello,
Our static analysis tool finds a possible uninitialized-variable access
in the jfs driver in Linux 5.14.0-rc3:
At the beginning of the function xtSplitUp(), the variable rbn is not
initialized.
If sp->header.flag & BT_ROOT is true,
780: rc = (sp->header.flag & BT_ROOT) ? xtSplitRoot(tid, ip, split,
&rmp) : xtSplitPage(tid, ip, split, &rmp, &rbn);
the varialbe rbn will remain uninitialized.
However, it is accessed through:
814: rcbn = rbn;
I am not quite sure whether this possible uninitialized-variable access
is real and how to fix it if it is real.
Any feedback would be appreciated, thanks!
Reported-by: TOTE Robot <oslab@tsinghua.edu.cn>
Best wishes,
Tuo Li
next reply other threads:[~2021-07-31 6:31 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-31 6:31 Li Tuo [this message]
2021-08-02 19:04 ` Dave Kleikamp
2021-08-03 2:46 ` Li Tuo
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