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| author | Ranganath V N <vnranganath.20@gmail.com> | 2025-11-09 14:43:35 +0530 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2025-11-11 15:00:08 +0100 |
| commit | 62b656e43eaeae445a39cd8021a4f47065af4389 (patch) | |
| tree | 2a3c0ba9adf22e7bfb97c9939fca6b91b23eec01 /net/unix/af_unix.c | |
| parent | 60e6489f8e3b086bd1130ad4450a2c112e863791 (diff) | |
net: sched: act_connmark: initialize struct tc_ife to fix kernel leak
In tcf_connmark_dump(), the variable 'opt' was partially initialized using a
designatied initializer. While the padding bytes are reamined
uninitialized. nla_put() copies the entire structure into a
netlink message, these uninitialized bytes leaked to userspace.
Initialize the structure with memset before assigning its fields
to ensure all members and padding are cleared prior to beign copied.
Reported-by: syzbot+0c85cae3350b7d486aee@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=0c85cae3350b7d486aee
Tested-by: syzbot+0c85cae3350b7d486aee@syzkaller.appspotmail.com
Fixes: 22a5dc0e5e3e ("net: sched: Introduce connmark action")
Signed-off-by: Ranganath V N <vnranganath.20@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20251109091336.9277-2-vnranganath.20@gmail.com
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'net/unix/af_unix.c')
0 files changed, 0 insertions, 0 deletions