* [syzbot] WARNING: ODEBUG bug in hwsim_del_radio_nl
@ 2026-08-18 10:47 syzbot
0 siblings, 0 replies; only message in thread
From: syzbot @ 2026-08-18 10:47 UTC (permalink / raw)
To: linux-kernel, syzkaller-bugs
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:
<TASK>
__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
---
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2026-08-18 10:47 [syzbot] WARNING: ODEBUG bug in hwsim_del_radio_nl syzbot
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