Re: [PATCH net] wifi: avoid kernel-infoleak from struct iw_point

On Thu, 2026-01-08 at 10:19 +0000, Eric Dumazet wrote:

struct iw_point has a 32bit hole on 64bit arches.

struct iw_point { void __user *pointer; /* Pointer to the data (in user space) */ __u16 length; /* number of fields or size in bytes */ __u16 flags; /* Optional params */ };

Make sure to zero the structure to avoid dislosing 32bits of kernel data to user space.

Heh, wow. Talk about old code.

Reported-by: syzbot+bfc7323743ca6dbcc3d3@syzkaller.appspotmail.com https://lore.kernel.org/netdev/695f83f3.050a0220.1c677c.0392.GAE@google.com/...

Was that intentionally without Link: or some other tag?

johannes