diff options
| author | Herbert Xu <herbert@gondor.apana.org.au> | 2024-04-03 17:36:18 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-06-27 13:52:11 +0200 |
| commit | c0643d07f84c310521686f3f3a373257439b6fa2 (patch) | |
| tree | ac9f3123d9ca58b569f06dd8194766d8b6e37712 | |
| parent | db044fa7404e8137a455504d6808b2d4a78a9cc7 (diff) | |
padata: Disable BH when taking works lock on MT path
[ Upstream commit 58329c4312031603bb1786b44265c26d5065fe72 ]
As the old padata code can execute in softirq context, disable
softirqs for the new padata_do_mutithreaded code too as otherwise
lockdep will get antsy.
Reported-by: syzbot+0cb5bb0f4bf9e79db3b3@syzkaller.appspotmail.com
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Daniel Jordan <daniel.m.jordan@oracle.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | kernel/padata.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/kernel/padata.c b/kernel/padata.c index e3f639ff1670..53f4bc912712 100644 --- a/kernel/padata.c +++ b/kernel/padata.c @@ -106,7 +106,7 @@ static int __init padata_work_alloc_mt(int nworks, void *data, { int i; - spin_lock(&padata_works_lock); + spin_lock_bh(&padata_works_lock); /* Start at 1 because the current task participates in the job. */ for (i = 1; i < nworks; ++i) { struct padata_work *pw = padata_work_alloc(); @@ -116,7 +116,7 @@ static int __init padata_work_alloc_mt(int nworks, void *data, padata_work_init(pw, padata_mt_helper, data, 0); list_add(&pw->pw_list, head); } - spin_unlock(&padata_works_lock); + spin_unlock_bh(&padata_works_lock); return i; } @@ -134,12 +134,12 @@ static void __init padata_works_free(struct list_head *works) if (list_empty(works)) return; - spin_lock(&padata_works_lock); + spin_lock_bh(&padata_works_lock); list_for_each_entry_safe(cur, next, works, pw_list) { list_del(&cur->pw_list); padata_work_free(cur); } - spin_unlock(&padata_works_lock); + spin_unlock_bh(&padata_works_lock); } static void padata_parallel_worker(struct work_struct *parallel_work) |