Messages in this thread | | | From | Li Tuo <> | Subject | [BUG] jfs: possible uninitialized-variable access in xtSplitUp() | Date | Sat, 31 Jul 2021 14:31:02 +0800 |
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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
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