Re: v4.14-rc2/arm64 misaligned atomic in ip_expire() / skb_clone()

2017-10-02 Thread Eric Dumazet
On Mon, 2017-10-02 at 12:57 +0100, Mark Rutland wrote: > Hi all, > > I'm intermittently hitting splats like below in skb_clone() while > fuzzing v4.14-rc2 on arm64 with Syzkaller. It looks like the > atomic_inc() at the end of __skb_clone() is being passed a misaligned > pointer. > > I've uploade

v4.14-rc2/arm64 misaligned atomic in ip_expire() / skb_clone()

2017-10-02 Thread Mark Rutland
Hi all, I'm intermittently hitting splats like below in skb_clone() while fuzzing v4.14-rc2 on arm64 with Syzkaller. It looks like the atomic_inc() at the end of __skb_clone() is being passed a misaligned pointer. I've uploaded a number of splats and their associated (full) Syzkaller logs, along