[syzbot] [net?] WARNING in gro_cell_poll

[syzbot] [net?] WARNING in gro_cell_poll

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit:    08df884136f1 Merge tag 'thermal-7.3-rc3' of git://git.kern..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13b88905580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=19560cab9a915237
dashboard link: https://syzkaller.appspot.com/bug?extid=f0661448aa9511ce744a
compiler:       gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/607f53d96d3b/disk-08df8841.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/af77b44e9d7f/vmlinux-08df8841.xz
kernel image: https://storage.googleapis.com/syzbot-assets/ebeacfa9027e/bzImage-08df8841.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+f0661448aa9511ce744a@syzkaller.appspotmail.com

------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(l->owner)
WARNING: ./include/linux/local_lock_internal.h:47 at local_lock_acquire include/linux/local_lock_internal.h:47 [inline], CPU#1: napi/gre0-0/11827
WARNING: ./include/linux/local_lock_internal.h:47 at gro_cell_poll+0x5aa/0x6c0 net/core/gro_cells.c:66, CPU#1: napi/gre0-0/11827
Modules linked in:
CPU: 1 UID: 0 PID: 11827 Comm: napi/gre0-0 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/05/2026
RIP: 0010:local_lock_acquire include/linux/local_lock_internal.h:47 [inline]
RIP: 0010:gro_cell_poll+0x5b1/0x6c0 net/core/gro_cells.c:66
Code: 8d 3d f3 aa 9a 07 48 c7 c6 40 c7 3c 8d 67 48 0f b9 3a e9 59 fe ff ff e8 dd 5e 52 f8 48 8d 3d e6 aa 9a 07 48 c7 c6 00 c7 3c 8d <67> 48 0f b9 3a eb be 31 db e9 88 fd ff ff 48 8b 7c 24 20 e8 97 a2
RSP: 0018:ffffc900033c7b70 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000200
RDX: ffff8880284e0000 RSI: ffffffff8d3cc700 RDI: ffffffff91544100
RBP: ffffe8ffffc37198 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffffffff9b99e5c0 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888123c59000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32617ff8 CR3: 000000005d244000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 __napi_poll.constprop.0+0xaf/0x450 net/core/dev.c:7787
 napi_threaded_poll_loop+0x52f/0x870 net/core/dev.c:7907
 napi_threaded_poll+0x3a8/0x4b0 net/core/dev.c:7962
 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:	8d 3d f3 aa 9a 07    	lea    0x79aaaf3(%rip),%edi        # 0x79aaaf9
   6:	48 c7 c6 40 c7 3c 8d 	mov    $0xffffffff8d3cc740,%rsi
   d:	67 48 0f b9 3a       	ud1    (%edx),%rdi
  12:	e9 59 fe ff ff       	jmp    0xfffffe70
  17:	e8 dd 5e 52 f8       	call   0xf8525ef9
  1c:	48 8d 3d e6 aa 9a 07 	lea    0x79aaae6(%rip),%rdi        # 0x79aab09
  23:	48 c7 c6 00 c7 3c 8d 	mov    $0xffffffff8d3cc700,%rsi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	eb be                	jmp    0xffffffef
  31:	31 db                	xor    %ebx,%ebx
  33:	e9 88 fd ff ff       	jmp    0xfffffdc0
  38:	48 8b 7c 24 20       	mov    0x20(%rsp),%rdi
  3d:	e8                   	.byte 0xe8
  3e:	97                   	xchg   %eax,%edi
  3f:	a2                   	.byte 0xa2


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