WARNING in rfkill_unregister

Status: upstream: reported on 2026/09/25 05:28
Reported-by: syzbot+c0cd5bf28f7710e1866c@syzkaller.appspotmail.com
First crash: 1d19h, last: 1d19h
▶ ▼ Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in rfkill_unregister wireless -1 1 272d 268d 0/29 auto-obsoleted due to no activity on 2026/04/07 01:14

Sample crash report:
------------[ cut here ]------------
sysfs group 'power' not found for kobject 'rfkill21'
WARNING: CPU: 1 PID: 9216 at fs/sysfs/group.c:280 sysfs_remove_group+0x177/0x290 fs/sysfs/group.c:278
Modules linked in:
CPU: 1 PID: 9216 Comm: syz.5.1603 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:sysfs_remove_group+0x177/0x290 fs/sysfs/group.c:278
Code: 8b 1b 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 eb 2b cb ff 49 8b 17 48 c7 c7 a0 70 9c 8a 48 89 de e8 f9 6d 45 ff <0f> 0b 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 03 e7 79 ff
RSP: 0000:ffffc9000ff0f6e0 EFLAGS: 00010246
RAX: 5ac3f2ae836a4900 RBX: ffffffff8b03c240 RCX: 0000000000080000
RDX: ffffc90004782000 RSI: 0000000000047a3a RDI: 0000000000047a3b
RBP: ffffc9000ff0f818 R08: ffffc9000ff0f367 R09: 1ffff92001fe1e6c
R10: dffffc0000000000 R11: fffff52001fe1e6d R12: 1ffffffff160784c
R13: dffffc0000000000 R14: ffff88807e1ae000 R15: ffff888076a06110
FS:  00007f4adf20b6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2b571556c8 CR3: 000000005535c000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 device_del+0x2ab/0xa80 drivers/base/core.c:3877
 rfkill_unregister+0xb6/0x2f0 net/rfkill/core.c:1161
 hci_unregister_dev+0x373/0x500 net/bluetooth/hci_core.c:2735
 hci_uart_tty_close+0x268/0x330 drivers/bluetooth/hci_ldisc.c:578
 tty_ldisc_reinit+0xe4/0x460 drivers/tty/tty_ldisc.c:661
 tty_ldisc_hangup+0x360/0x4a0 drivers/tty/tty_ldisc.c:726
 __tty_hangup+0x40e/0x660 drivers/tty/tty_io.c:631
 __tty_port_tty_hangup+0x111/0x1a0 drivers/tty/tty_port.c:422
 tty_port_tty_vhangup include/linux/tty_port.h:272 [inline]
 uart_remove_one_port+0x227/0x7c0 drivers/tty/serial/serial_core.c:3218
 serial8250_unregister_port+0xac/0x240 drivers/tty/serial/8250/8250_core.c:1154
 pnp_device_remove+0x78/0x250 drivers/pnp/driver.c:133
 device_remove drivers/base/dd.c:547 [inline]
 __device_release_driver drivers/base/dd.c:1279 [inline]
 device_release_driver_internal+0x47d/0x7c0 drivers/base/dd.c:1305
 unbind_store+0x2e2/0x300 drivers/base/bus.c:193
 kernfs_fop_write_iter+0x3a0/0x520 fs/kernfs/file.c:352
 call_write_iter include/linux/fs.h:2271 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x482/0x9a0 fs/read_write.c:584
 ksys_write+0x14d/0x260 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f4ade39e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4adf20b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f4ade625fa0 RCX: 00007f4ade39e159
RDX: 0000000000000006 RSI: 00002000000001c0 RDI: 0000000000000004
RBP: 00007f4ade43506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4ade626038 R14: 00007f4ade625fa0 R15: 00007ffda173bec8
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/25 05:27 linux-6.1.y 1a8763b93150 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in rfkill_unregister
* Struck through repros no longer work on HEAD.