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| author | Alexander Potapenko <glider@google.com> | 2017-04-25 18:51:46 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-10-08 10:14:18 +0200 |
| commit | fa63895f47c9253a0305a5d0862e98ab6f11e718 (patch) | |
| tree | ea7d82fce77c6190a6fdab11cecb599902133f3e /tools/perf/scripts/python | |
| parent | b9ff317b5cd4a8f7ca13934af679e129c3f1d2ce (diff) | |
net/packet: check length in getsockopt() called with PACKET_HDRLEN
[ Upstream commit fd2c83b35752f0a8236b976978ad4658df14a59f ]
In the case getsockopt() is called with PACKET_HDRLEN and optlen < 4
|val| remains uninitialized and the syscall may behave differently
depending on its value, and even copy garbage to userspace on certain
architectures. To fix this we now return -EINVAL if optlen is too small.
This bug has been detected with KMSAN.
Signed-off-by: Alexander Potapenko <glider@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions