linux-kernel - [syzbot] [net?] BUG: corrupted list in __nsim_dev_port

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Message-ID: <681c83c3.050a0220.a19a9.00d9.GAE@google.com>
Date: Thu, 08 May 2025 03:13:23 -0700
From: syzbot <syzbot+ccf06e09fd9a78979179@...kaller.appspotmail.com>
To: andrew+netdev@...n.ch, davem@...emloft.net, edumazet@...gle.com, 
	kuba@...nel.org, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, 
	pabeni@...hat.com, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [net?] BUG: corrupted list in __nsim_dev_port_del

Hello,

syzbot found the following issue on:

HEAD commit:    707df3375124 Merge tag 'media/v6.15-2' of git://git.kernel..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12ac8670580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=b39cb28b0a399ed3
dashboard link: https://syzkaller.appspot.com/bug?extid=ccf06e09fd9a78979179
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40

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-707df337.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/f71d162685b9/vmlinux-707df337.xz
kernel image: https://storage.googleapis.com/syzbot-assets/940cb473e515/bzImage-707df337.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ccf06e09fd9a78979179@...kaller.appspotmail.com

list_del corruption. next->prev should be ffff888044a30400, but was ffffffff9af9a480. (next=ffff888031704400)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:65!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 2 UID: 0 PID: 16418 Comm: syz-executor Not tainted 6.15.0-rc5-syzkaller-00038-g707df3375124 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__list_del_entry_valid_or_report+0x1b3/0x200 lib/list_debug.c:65
Code: 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 75 4b 49 8b 54 24 08 4c 89 e1 48 89 de 48 c7 c7 80 87 f4 8b e8 be 50 c4 fc 90 <0f> 0b e8 f6 7e 4a fd e9 6b fe ff ff 48 89 df e8 e9 7e 4a fd e9 7d
RSP: 0018:ffffc90003d2f980 EFLAGS: 00010286
RAX: 000000000000006d RBX: ffff888044a30400 RCX: ffffffff819a90e9
RDX: 0000000000000000 RSI: ffffffff819b0f76 RDI: 0000000000000005
RBP: ffff888031704408 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000000 R12: ffff888031704400
R13: ffff888044a30408 R14: ffff8880512ce000 R15: dffffc0000000000
FS:  0000555579180500(0000) GS:ffff8880d6bdf000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc89863d68 CR3: 000000011723c000 CR4: 0000000000352ef0
DR0: 0000000000000007 DR1: 0000000000000002 DR2: 0000000000000008
DR3: 1000000100000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __list_del_entry_valid include/linux/list.h:124 [inline]
 __list_del_entry include/linux/list.h:215 [inline]
 list_del include/linux/list.h:229 [inline]
 __nsim_dev_port_del+0x20/0x240 drivers/net/netdevsim/dev.c:1425
 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1440 [inline]
 nsim_dev_reload_destroy+0x10a/0x4d0 drivers/net/netdevsim/dev.c:1661
 nsim_drv_remove+0x52/0x1d0 drivers/net/netdevsim/dev.c:1676
 device_remove+0xc8/0x170 drivers/base/dd.c:567
 __device_release_driver drivers/base/dd.c:1272 [inline]
 device_release_driver_internal+0x44b/0x620 drivers/base/dd.c:1295
 bus_remove_device+0x22f/0x420 drivers/base/bus.c:579
 device_del+0x396/0x9f0 drivers/base/core.c:3881
 device_unregister+0x1d/0xc0 drivers/base/core.c:3922
 nsim_bus_dev_del drivers/net/netdevsim/bus.c:462 [inline]
 del_device_store+0x355/0x4a0 drivers/net/netdevsim/bus.c:226
 bus_attr_store+0x71/0xb0 drivers/base/bus.c:172
 sysfs_kf_write+0xef/0x150 fs/sysfs/file.c:145
 kernfs_fop_write_iter+0x351/0x510 fs/kernfs/file.c:334
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x5ba/0x1180 fs/read_write.c:684
 ksys_write+0x12a/0x240 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1c3858d41f
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 92 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 4c 93 02 00 48
RSP: 002b:00007ffc89864410 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007f1c3858d41f
RDX: 0000000000000001 RSI: 00007ffc89864460 RDI: 0000000000000005
RBP: 00007f1c38611d05 R08: 0000000000000000 R09: 00007ffc89864267
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
R13: 00007ffc89864460 R14: 00007f1c392e4620 R15: 0000000000000003
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_del_entry_valid_or_report+0x1b3/0x200 lib/list_debug.c:65
Code: 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 75 4b 49 8b 54 24 08 4c 89 e1 48 89 de 48 c7 c7 80 87 f4 8b e8 be 50 c4 fc 90 <0f> 0b e8 f6 7e 4a fd e9 6b fe ff ff 48 89 df e8 e9 7e 4a fd e9 7d
RSP: 0018:ffffc90003d2f980 EFLAGS: 00010286
RAX: 000000000000006d RBX: ffff888044a30400 RCX: ffffffff819a90e9
RDX: 0000000000000000 RSI: ffffffff819b0f76 RDI: 0000000000000005
RBP: ffff888031704408 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000000 R12: ffff888031704400
R13: ffff888044a30408 R14: ffff8880512ce000 R15: dffffc0000000000
FS:  0000555579180500(0000) GS:ffff8880d6bdf000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc89863d68 CR3: 000000011723c000 CR4: 0000000000352ef0
DR0: 0000000000000007 DR1: 0000000000000002 DR2: 0000000000000008
DR3: 1000000100000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
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