From 0dfcb72d33c767bbe63f4a6872108515594154d9 Mon Sep 17 00:00:00 2001 From: Rik van Riel Date: Thu, 10 Oct 2024 11:36:51 -0400 Subject: [PATCH] coredump: add cond_resched() to dump_user_range The loop between elf_core_dump() and dump_user_range() can run for so long that the system shows softlockup messages, with side effects like workqueues and RCU getting stuck on the core dumping CPU. Add a cond_resched() in dump_user_range() to avoid that softlockup. Signed-off-by: Rik van Riel Link: https://lore.kernel.org/r/20241010113651.50cb0366@imladris.surriel.com Signed-off-by: Christian Brauner --- fs/coredump.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/coredump.c b/fs/coredump.c index 45737b43dda5..d48edb37bc35 100644 --- a/fs/coredump.c +++ b/fs/coredump.c @@ -951,6 +951,7 @@ int dump_user_range(struct coredump_params *cprm, unsigned long start, } else { dump_skip(cprm, PAGE_SIZE); } + cond_resched(); } dump_page_free(dump_page); return 1;