From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f198.google.com (mail-oi1-f198.google.com [209.85.167.198]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8F763218E91 for ; Mon, 12 Oct 2026 07:34:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.198 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791790447; cv=none; b=KdYyRqg1Hb827WnieKgyXMZSHIN3VJYwNHmawpSD3gvvhpw5lcvfEUCZ8z9ShebQ0BaQ8Wbh2CFNK8GoNhasITFi81+FD6XdDWV+LaKw2kNfSscgwmVf3RXa1g6RBJYolq1Yf1PaVOQvIVrUFbZNj71tF90V6nuxbFVNFovoBI8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791790447; c=relaxed/simple; bh=u5ucv+40qY58UBntT4AAB1wVtj+A7pCpsxVHCqRID6w=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; 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2002:a05:6808:1818:b0:4f5:41e:932e with SMTP id 5614622812f47-50c54177a32mr7942842b6e.35.1791790444417; Mon, 12 Oct 2026 00:34:04 -0700 (PDT) Date: Mon, 12 Oct 2026 00:34:04 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6acc8d6c.0e5b5d80.2c029c.0557.GAE@google.com> Subject: Re: [syzbot] WARNING: ODEBUG bug in hwsim_del_radio_nl From: syzbot To: aryanarora.w1@gmail.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KASAN: invalid-free in rcu_free_sheaf ================================================================== BUG: KASAN: double-free in rcu_free_sheaf+0x1a/0xe0 mm/slub.c:6061 Free of addr ffff88802b245a00 by task ksoftirqd/3/34 CPU: 3 UID: 0 PID: 34 Comm: ksoftirqd/3 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x13d/0x4b0 mm/kasan/report.c:482 kasan_report_invalid_free+0xb8/0x190 mm/kasan/report.c:557 check_slab_allocation+0xc3/0xf0 mm/kasan/common.c:246 kasan_slab_pre_free include/linux/kasan.h:199 [inline] slab_free_hook mm/slub.c:2693 [inline] __rcu_free_sheaf_prepare+0x117/0x300 mm/slub.c:3009 rcu_free_sheaf+0x1a/0xe0 mm/slub.c:6061 rcu_do_batch kernel/rcu/tree.c:2650 [inline] rcu_core+0x5f0/0x1260 kernel/rcu/tree.c:2919 handle_softirqs+0x1e6/0x9d0 kernel/softirq.c:645 run_ksoftirqd kernel/softirq.c:1099 [inline] run_ksoftirqd+0x38/0x60 kernel/softirq.c:1091 smpboot_thread_fn+0x3d3/0xab0 kernel/smpboot.c:160 kthread+0x373/0x450 kernel/kthread.c:436 ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Allocated by task 12: kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:409 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:426 kasan_kmalloc include/linux/kasan.h:263 [inline] __kmalloc_cache_noprof+0x2f8/0x6d0 mm/slub.c:5563 _kmalloc_noprof include/linux/slab.h:991 [inline] _kzalloc_noprof include/linux/slab.h:1312 [inline] hwsim_update_pib.isra.0+0x53/0x410 drivers/net/ieee802154/mac802154_hwsim.c:103 hwsim_set_promiscuous_mode+0x14f/0x3a0 drivers/net/ieee802154/mac802154_hwsim.c:326 drv_set_promiscuous_mode+0x133/0x330 net/mac802154/driver-ops.h:127 drv_start net/mac802154/driver-ops.h:167 [inline] mac802154_scan_worker+0x68e/0x1240 net/mac802154/scan.c:248 process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396 process_scheduled_works kernel/workqueue.c:3479 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560 kthread+0x373/0x450 kernel/kthread.c:436 ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Freed by task 34: kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:264 [inline] __kasan_slab_free+0x5f/0x80 mm/kasan/common.c:296 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2748 [inline] __rcu_free_sheaf_prepare+0x5d/0x300 mm/slub.c:3009 rcu_free_sheaf+0x1a/0xe0 mm/slub.c:6061 rcu_do_batch kernel/rcu/tree.c:2650 [inline] rcu_core+0x5f0/0x1260 kernel/rcu/tree.c:2919 handle_softirqs+0x1e6/0x9d0 kernel/softirq.c:645 run_ksoftirqd kernel/softirq.c:1099 [inline] run_ksoftirqd+0x38/0x60 kernel/softirq.c:1091 smpboot_thread_fn+0x3d3/0xab0 kernel/smpboot.c:160 kthread+0x373/0x450 kernel/kthread.c:436 ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 The buggy address belongs to the object at ffff88802b245a00 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 0 bytes inside of 64-byte region [ffff88802b245a00, ffff88802b245a40) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2b245 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000000 ffff88801c0428c0 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000200020 00000000f5000000 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0xd2cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 6670034199 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1871 prep_new_page mm/page_alloc.c:1879 [inline] get_page_from_freelist+0x110d/0x35d0 mm/page_alloc.c:3943 __alloc_frozen_pages_noprof+0x2eb/0x3300 mm/page_alloc.c:5436 alloc_slab_page mm/slub.c:3347 [inline] allocate_slab mm/slub.c:3462 [inline] new_slab+0xa9/0x6e0 mm/slub.c:3513 refill_objects+0xe3/0x410 mm/slub.c:7418 refill_sheaf mm/slub.c:2885 [inline] __pcs_replace_empty_main+0x35e/0x650 mm/slub.c:4774 alloc_from_pcs mm/slub.c:4850 [inline] slab_alloc_node mm/slub.c:4984 [inline] __kmalloc_cache_noprof+0x4f4/0x6d0 mm/slub.c:5559 _kmalloc_noprof include/linux/slab.h:991 [inline] __kthread_create_on_node+0xce/0x3f0 kernel/kthread.c:483 kthread_create_on_node+0xc7/0x100 kernel/kthread.c:559 init_rescuer+0x321/0x550 kernel/workqueue.c:5805 __alloc_workqueue+0xe82/0x1950 kernel/workqueue.c:5993 alloc_workqueue_va kernel/workqueue.c:6033 [inline] alloc_workqueue_noprof+0xc7/0x130 kernel/workqueue.c:6049 nvme_core_init+0x4a/0x1f0 drivers/nvme/host/core.c:5516 do_one_initcall+0x11c/0x6f0 init/main.c:1362 do_initcall_level init/main.c:1424 [inline] do_initcalls init/main.c:1440 [inline] do_basic_setup init/main.c:1460 [inline] kernel_init_freeable+0x6ea/0x7b0 init/main.c:1675 kernel_init+0x21/0x1e0 init/main.c:1565 page_owner free stack trace missing Memory state around the buggy address: ffff88802b245900: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ffff88802b245980: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc >ffff88802b245a00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ^ ffff88802b245a80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff88802b245b00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ================================================================== Tested on: commit: 24a19b95 Linux 7.3-rc7 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1204429c580000 kernel config: https://syzkaller.appspot.com/x/.config?x=3b57b1287207ae97 dashboard link: https://syzkaller.appspot.com/bug?extid=19cbce4cc656ecd4febc compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 patch: https://syzkaller.appspot.com/x/patch.diff?x=15b119c9580000