From 31e03207119a535d0b0e3b3a7f91983aeb2cb14d Mon Sep 17 00:00:00 2001 From: Kuniyuki Iwashima Date: Tue, 23 Jan 2024 09:08:52 -0800 Subject: af_unix: Annotate data-race of gc_in_progress in wait_for_unix_gc(). gc_in_progress is changed under spin_lock(&unix_gc_lock), but wait_for_unix_gc() reads it locklessly. Let's use READ_ONCE(). Fixes: 5f23b734963e ("net: Fix soft lockups/OOM issues w/ unix garbage collector") Signed-off-by: Kuniyuki Iwashima Link: https://lore.kernel.org/r/20240123170856.41348-2-kuniyu@amazon.com Signed-off-by: Jakub Kicinski --- net/unix/garbage.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/unix') diff --git a/net/unix/garbage.c b/net/unix/garbage.c index 2405f0f9af31..af3d2221cf6a 100644 --- a/net/unix/garbage.c +++ b/net/unix/garbage.c @@ -198,7 +198,7 @@ void wait_for_unix_gc(void) if (READ_ONCE(unix_tot_inflight) > UNIX_INFLIGHT_TRIGGER_GC && !READ_ONCE(gc_in_progress)) unix_gc(); - wait_event(unix_gc_wait, gc_in_progress == false); + wait_event(unix_gc_wait, !READ_ONCE(gc_in_progress)); } /* The external entry point: unix_gc() */ -- cgit v1.2.3