Re: [PATCH 4.19-stable 1/3] tcp: annotate tp->copied_seq lockless reads

2021-03-12 Thread Greg Kroah-Hartman
On Fri, Mar 12, 2021 at 12:33:21AM -0800, Eric Dumazet wrote: > From: Eric Dumazet > > [ Upstream commit 7db48e983930285b765743ebd665aecf9850582b ] > > There are few places where we fetch tp->copied_seq while > this field can change from IRQ or other cpu. > > We need to add READ_ONCE() annotati

[PATCH 4.19-stable 1/3] tcp: annotate tp->copied_seq lockless reads

2021-03-12 Thread Eric Dumazet
From: Eric Dumazet [ Upstream commit 7db48e983930285b765743ebd665aecf9850582b ] There are few places where we fetch tp->copied_seq while this field can change from IRQ or other cpu. We need to add READ_ONCE() annotations, and also make sure write sides use corresponding WRITE_ONCE() to avoid st