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Tue, 18 Aug 2026 03:47:41 -0700 (PDT) Date: Tue, 18 Aug 2026 03:47:41 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a84384d.ae6ddae5.3da009.0000.GAE@google.com> Subject: [syzbot] WARNING: ODEBUG bug in hwsim_del_radio_nl From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 2f1baf1fc892 Merge tag 'trace-v7.2-rc7' of git://git.kerne.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=108da279580000 kernel config: https://syzkaller.appspot.com/x/.config?x=c44651ea7dd2f307 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 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=157df149580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+19cbce4cc656ecd4febc@syzkaller.appspotmail.com ------------[ cut here ]------------ ODEBUG: free active (active state 0) object: ffff88802e98a900 object type: timer_list hint: mac802154_scan_worker+0x0/0x1450 arch/x86/include/asm/bitops.h:202 WARNING: lib/debugobjects.c:629 at debug_print_object+0x198/0x2b0 lib/debugobjects.c:629, CPU#2: syz-executor392/6031 Modules linked in: CPU: 2 UID: 0 PID: 6031 Comm: syz-executor392 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 RIP: 0010:debug_print_object+0x1a5/0x2b0 lib/debugobjects.c:629 Code: b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 4f 48 8d 3d e8 28 05 0c 41 56 48 8b 14 ed 40 16 40 8c 4c 89 e6 <67> 48 0f b9 3a 58 83 05 62 4a fa 0b 01 48 83 c4 18 5b 5d 41 5c 41 RSP: 0018:ffffc90004d57538 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffffc90004d57620 RCX: 0000000000000000 RDX: ffffffff8c401580 RSI: ffffffff8c401120 RDI: ffffffff912cab20 RBP: 0000000000000003 R08: ffff88802e98a900 R09: ffffffff8bd2f280 R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8c401120 R13: ffffffff8bd2f2c0 R14: ffffffff8b759990 R15: ffffc90004d57638 FS: 000055555d787400(0000) GS:ffff8880d5fe9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000560dc5482000 CR3: 0000000027949000 CR4: 0000000000352ef0 Call Trace: __debug_check_no_obj_freed lib/debugobjects.c:1171 [inline] debug_check_no_obj_freed+0x4da/0x630 lib/debugobjects.c:1201 slab_free_hook mm/slub.c:2608 [inline] slab_free mm/slub.c:6377 [inline] kfree+0x3d8/0x6c0 mm/slub.c:6692 device_release+0xd2/0x270 drivers/base/core.c:2636 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1f7/0x640 lib/kobject.c:737 put_device+0x1f/0x30 drivers/base/core.c:3880 hwsim_del_radio_nl+0x161/0x200 drivers/net/ieee802154/mac802154_hwsim.c:358 genl_family_rcv_msg_doit+0x214/0x300 net/netlink/genetlink.c:1114 genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline] genl_rcv_msg+0x560/0x800 net/netlink/genetlink.c:1209 netlink_rcv_skb+0x159/0x420 net/netlink/af_netlink.c:2556 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x585/0x850 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1900 sock_sendmsg_nosec net/socket.c:775 [inline] __sock_sendmsg net/socket.c:790 [inline] __sys_sendto+0x48b/0x4e0 net/socket.c:2252 __do_sys_sendto net/socket.c:2259 [inline] __se_sys_sendto net/socket.c:2255 [inline] __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2255 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f86a2fe5fb7 Code: 48 89 fa 4c 89 df e8 98 1d 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff RSP: 002b:00007ffd8a516790 EFLAGS: 00000202 ORIG_RAX: 000000000000002c ---------------- Code disassembly (best guess): 0: b8 00 00 00 00 mov $0x0,%eax 5: 00 fc add %bh,%ah 7: ff lcall (bad) 8: df 48 89 fisttps -0x77(%rax) b: fa cli c: 48 c1 ea 03 shr $0x3,%rdx 10: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 14: 75 4f jne 0x65 16: 48 8d 3d e8 28 05 0c lea 0xc0528e8(%rip),%rdi # 0xc052905 1d: 41 56 push %r14 1f: 48 8b 14 ed 40 16 40 mov -0x73bfe9c0(,%rbp,8),%rdx 26: 8c 27: 4c 89 e6 mov %r12,%rsi * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 58 pop %rax 30: 83 05 62 4a fa 0b 01 addl $0x1,0xbfa4a62(%rip) # 0xbfa4a99 37: 48 83 c4 18 add $0x18,%rsp 3b: 5b pop %rbx 3c: 5d pop %rbp 3d: 41 5c pop %r12 3f: 41 rex.B --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup