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author | Jia-Ju Bai <baijiaju1990@gmail.com> | 2019-07-24 10:22:42 +0800 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-07-25 15:32:51 +0200 |
commit | bbe70e4e421116db0af3acf84cbce3c3f6cac53e (patch) | |
tree | 189d5d1d40f6f7584304ca23f3f047fbb233e1a0 /tools/perf/scripts/python/exported-sql-viewer.py | |
parent | 2fd60da46da76948b8cc561ae8cc902209686253 (diff) |
fs: kernfs: Fix possible null-pointer dereferences in kernfs_path_from_node_locked()
In kernfs_path_from_node_locked(), there is an if statement on line 147
to check whether buf is NULL:
if (buf)
When buf is NULL, it is used on line 151:
len += strlcpy(buf + len, parent_str, ...)
and line 158:
len += strlcpy(buf + len, "/", ...)
and line 160:
len += strlcpy(buf + len, kn->name, ...)
Thus, possible null-pointer dereferences may occur.
To fix these possible bugs, buf is checked before being used.
If it is NULL, -EINVAL is returned.
These bugs are found by a static analysis tool STCheck written by us.
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Link: https://lore.kernel.org/r/20190724022242.27505-1-baijiaju1990@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf/scripts/python/exported-sql-viewer.py')
0 files changed, 0 insertions, 0 deletions