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| author | Peilin Ye <yepeilin.cs@gmail.com> | 2020-07-30 15:20:26 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-08-21 10:52:53 +0200 |
| commit | 21d2a29f7c1cef6eb15390bca30b6cb509d29d78 (patch) | |
| tree | 2e509cdbccc792e25bdf4623e69cfb9176ae32bc /tools/perf/scripts/python/bin | |
| parent | bb4dfb3435708fc15a91a739a295151e34a15686 (diff) | |
rds: Prevent kernel-infoleak in rds_notify_queue_get()
commit bbc8a99e952226c585ac17477a85ef1194501762 upstream.
rds_notify_queue_get() is potentially copying uninitialized kernel stack
memory to userspace since the compiler may leave a 4-byte hole at the end
of `cmsg`.
In 2016 we tried to fix this issue by doing `= { 0 };` on `cmsg`, which
unfortunately does not always initialize that 4-byte hole. Fix it by using
memset() instead.
Cc: stable@vger.kernel.org
Fixes: f037590fff30 ("rds: fix a leak of kernel memory")
Fixes: bdbe6fbc6a2f ("RDS: recv.c")
Suggested-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Peilin Ye <yepeilin.cs@gmail.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf/scripts/python/bin')
0 files changed, 0 insertions, 0 deletions