mirror of https://lore.kernel.org/lkml/
 help / color / mirror / Atom feed
* [syzbot] [net?] [nfc?] WARNING in nci_rsp_packet
@ 2026-10-02  6:47 syzbot
  0 siblings, 0 replies; only message in thread
From: syzbot @ 2026-10-02  6:47 UTC (permalink / raw)
  To: davem, david, edumazet, horms, krzk, kuba, linux-kernel, netdev,
	oe-linux-nfc, pabeni, syzkaller-bugs

Hello,

syzbot found the following issue on:

HEAD commit:    d266640c6c76 Merge tag 'driver-core-7.3-rc5' of git://git...
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=116eb315580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=2a820d8842c77560
dashboard link: https://syzkaller.appspot.com/bug?extid=ebbbf06f152da8ea4716
compiler:       gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
userspace arch: i386

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-d266640c.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/7a2c43e9e32e/vmlinux-d266640c.xz
kernel image: https://storage.googleapis.com/syzbot-assets/74034a2af7be/bzImage-d266640c.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ebbbf06f152da8ea4716@syzkaller.appspotmail.com

------------[ cut here ]------------
workqueue: cannot queue nci_cmd_work on wq nfc2_nci_cmd_wq
WARNING: kernel/workqueue.c:2352 at __queue_work+0xdb7/0x1370 kernel/workqueue.c:2351, CPU#3: kworker/u32:0/12
Modules linked in:
CPU: 3 UID: 0 PID: 12 Comm: kworker/u32:0 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Workqueue: nfc2_nci_rx_wq nci_rx_work
RIP: 0010:__queue_work+0xdbb/0x1370 kernel/workqueue.c:2351
Code: 00 00 00 fc ff df 49 8d 94 24 70 01 00 00 48 89 f9 48 c1 e9 03 80 3c 01 00 0f 85 84 05 00 00 48 8d 3d 29 43 78 0f 48 8b 75 18 <67> 48 0f b9 3a 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03
RSP: 0000:ffffc900001e7a40 EFLAGS: 00010046
RAX: dffffc0000000000 RBX: ffff888026cc1000 RCX: 1ffff1100f10e022
RDX: ffff8880298be170 RSI: ffffffff8ba2d9c0 RDI: ffffffff91486f90
RBP: ffff8880788700f8 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000200000 R11: 000000000000761b R12: ffff8880298be000
R13: 1ffff9200003cf52 R14: 0000000000000020 R15: 0000000000000084
FS:  0000000000000000(0000) GS:ffff888096c55000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000c3aef55 CR3: 0000000078b7d000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 queue_work_on+0x180/0x1e0 kernel/workqueue.c:2501
 queue_work include/linux/workqueue.h:700 [inline]
 nci_rsp_packet+0x297/0x3420 net/nfc/nci/rsp.c:463
 nci_rx_work+0x29c/0x430 net/nfc/nci/core.c:1579
 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
 </TASK>
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	00 fc                	add    %bh,%ah
   4:	ff                   	lcall  (bad)
   5:	df 49 8d             	fisttps -0x73(%rcx)
   8:	94                   	xchg   %eax,%esp
   9:	24 70                	and    $0x70,%al
   b:	01 00                	add    %eax,(%rax)
   d:	00 48 89             	add    %cl,-0x77(%rax)
  10:	f9                   	stc
  11:	48 c1 e9 03          	shr    $0x3,%rcx
  15:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  19:	0f 85 84 05 00 00    	jne    0x5a3
  1f:	48 8d 3d 29 43 78 0f 	lea    0xf784329(%rip),%rdi        # 0xf78434f
  26:	48 8b 75 18          	mov    0x18(%rbp),%rsi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  36:	fc ff df
  39:	48 89 ea             	mov    %rbp,%rdx
  3c:	48 c1 ea 03          	shr    $0x3,%rdx


---
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 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

^ permalink raw reply	[flat|nested] only message in thread

only message in thread, other threads:[~2026-10-02  6:47 UTC | newest]

Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2026-10-02  6:47 [syzbot] [net?] [nfc?] WARNING in nci_rsp_packet syzbot

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox

all inboxes | Powered by JetHome®