linux-kernel - Re: [syzbot] [kernel?] kernel BUG in binder_alloc_deferred

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Message-Id: <20241029112046.2492-1-hdanton@sina.com>
Date: Tue, 29 Oct 2024 19:20:46 +0800
From: Hillf Danton <hdanton@...a.com>
To: syzbot <syzbot+dee8aa54cb2f5a150f9e@...kaller.appspotmail.com>
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [kernel?] kernel BUG in binder_alloc_deferred_release (2)

On Mon, 28 Oct 2024 09:33:26 -0700
> syzbot found the following issue on:
> 
> HEAD commit:    c2ee9f594da8 KVM: selftests: Fix build on on non-x86 archi..
> git tree:       upstream
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=132b2ebb980000

#syz test

--- x/drivers/android/binder.c
+++ y/drivers/android/binder.c
@@ -6307,6 +6307,7 @@ binder_defer_work(struct binder_proc *pr
 		hlist_add_head(&proc->deferred_work_node,
 				&binder_deferred_list);
 		schedule_work(&binder_deferred_work);
+		binder_alloc_vma_close(&proc->alloc);
 	}
 	mutex_unlock(&binder_deferred_lock);
 }
--