[v6.1] WARNING in virtio_dev_remove
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syzbot
Jul 31, 2026, 2:23:23 AM (4 days ago) Jul 31
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: fb28aa725e05 Linux 6.1.180
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1100a5b9580000
kernel config: https://syzkaller.appspot.com/x/.config?x=31dfefc4a14efea3
dashboard link: https://syzkaller.appspot.com/bug?extid=e2b16532e54989c38312
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/9a6fe2a54d0f/disk-fb28aa72.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/742b23a1d931/vmlinux-fb28aa72.xz
kernel image: https://storage.googleapis.com/syzbot-assets/b3f257c16d2e/bzImage-fb28aa72.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e2b165...@syzkaller.appspotmail.com
------------[ cut here ]------------
WARNING: CPU: 0 PID: 6023 at drivers/virtio/virtio.c:335 virtio_dev_remove+0x16f/0x1a0 drivers/virtio/virtio.c:335
Modules linked in:
CPU: 0 PID: 6023 Comm: syz.1.372 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:virtio_dev_remove+0x16f/0x1a0 drivers/virtio/virtio.c:335
Code: 08 48 89 df e8 92 f4 5f fd 4c 89 f7 ff 13 0c 01 0f b6 f0 4c 89 f7 4c 89 e0 5b 41 5c 41 5d 41 5e 41 5f 5d ff e0 e8 b1 c7 0e fd <0f> 0b e9 78 ff ff ff 44 89 e9 80 e1 07 38 c1 0f 8c d8 fe ff ff 4c
RSP: 0018:ffffc900035078c0 EFLAGS: 00010246
RAX: ffffffff8473666f RBX: ffff88801d3b2500 RCX: 0000000000080000
RDX: ffffc9000c879000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: 00000000000000ff R08: ffffffff90b10277 R09: 1ffffffff216204e
R10: dffffc0000000000 R11: fffffbfff216204f R12: 1ffff11003a764a0
R13: dffffc0000000000 R14: ffff88801d3b2000 R15: ffffffff8aeb95b8
FS: 00007f04b4b276c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f127c61a000 CR3: 0000000061719000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
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
bus_remove_device+0x2dd/0x400 drivers/base/bus.c:531
device_del+0x63f/0xa80 drivers/base/core.c:3900
device_unregister+0x1c/0xc0 drivers/base/core.c:3943
unregister_virtio_device+0x33/0x60 drivers/virtio/virtio.c:483
virtio_pci_remove+0x7b/0xf0 drivers/virtio/virtio_pci_common.c:600
pci_device_remove+0x93/0x230 drivers/pci/pci-driver.c:483
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
pci_stop_dev drivers/pci/remove.c:22 [inline]
pci_stop_bus_device+0x108/0x140 drivers/pci/remove.c:82
pci_stop_and_remove_bus_device drivers/pci/remove.c:116 [inline]
pci_stop_and_remove_bus_device_locked+0x16/0x30 drivers/pci/remove.c:124
remove_store+0xe2/0x140 drivers/pci/pci-sysfs.c:515
kernfs_fop_write_iter+0x3a0/0x520 fs/kernfs/file.c:352
call_write_iter include/linux/fs.h:2265 [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: 0033:0x7f04b3b9e019
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:00007f04b4b27028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f04b3e25fa0 RCX: 00007f04b3b9e019
RDX: 0000000000000001 RSI: 0000200000000200 RDI: 0000000000000004
RBP: 00007f04b3c3500c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f04b3e26038 R14: 00007f04b3e25fa0 R15: 00007ffc51c41738
</TASK>
---
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 syzk...@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
syzbot found the following issue on:
HEAD commit: fb28aa725e05 Linux 6.1.180
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1100a5b9580000
kernel config: https://syzkaller.appspot.com/x/.config?x=31dfefc4a14efea3
dashboard link: https://syzkaller.appspot.com/bug?extid=e2b16532e54989c38312
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/9a6fe2a54d0f/disk-fb28aa72.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/742b23a1d931/vmlinux-fb28aa72.xz
kernel image: https://storage.googleapis.com/syzbot-assets/b3f257c16d2e/bzImage-fb28aa72.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e2b165...@syzkaller.appspotmail.com
------------[ cut here ]------------
WARNING: CPU: 0 PID: 6023 at drivers/virtio/virtio.c:335 virtio_dev_remove+0x16f/0x1a0 drivers/virtio/virtio.c:335
Modules linked in:
CPU: 0 PID: 6023 Comm: syz.1.372 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:virtio_dev_remove+0x16f/0x1a0 drivers/virtio/virtio.c:335
Code: 08 48 89 df e8 92 f4 5f fd 4c 89 f7 ff 13 0c 01 0f b6 f0 4c 89 f7 4c 89 e0 5b 41 5c 41 5d 41 5e 41 5f 5d ff e0 e8 b1 c7 0e fd <0f> 0b e9 78 ff ff ff 44 89 e9 80 e1 07 38 c1 0f 8c d8 fe ff ff 4c
RSP: 0018:ffffc900035078c0 EFLAGS: 00010246
RAX: ffffffff8473666f RBX: ffff88801d3b2500 RCX: 0000000000080000
RDX: ffffc9000c879000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: 00000000000000ff R08: ffffffff90b10277 R09: 1ffffffff216204e
R10: dffffc0000000000 R11: fffffbfff216204f R12: 1ffff11003a764a0
R13: dffffc0000000000 R14: ffff88801d3b2000 R15: ffffffff8aeb95b8
FS: 00007f04b4b276c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f127c61a000 CR3: 0000000061719000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
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
bus_remove_device+0x2dd/0x400 drivers/base/bus.c:531
device_del+0x63f/0xa80 drivers/base/core.c:3900
device_unregister+0x1c/0xc0 drivers/base/core.c:3943
unregister_virtio_device+0x33/0x60 drivers/virtio/virtio.c:483
virtio_pci_remove+0x7b/0xf0 drivers/virtio/virtio_pci_common.c:600
pci_device_remove+0x93/0x230 drivers/pci/pci-driver.c:483
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
pci_stop_dev drivers/pci/remove.c:22 [inline]
pci_stop_bus_device+0x108/0x140 drivers/pci/remove.c:82
pci_stop_and_remove_bus_device drivers/pci/remove.c:116 [inline]
pci_stop_and_remove_bus_device_locked+0x16/0x30 drivers/pci/remove.c:124
remove_store+0xe2/0x140 drivers/pci/pci-sysfs.c:515
kernfs_fop_write_iter+0x3a0/0x520 fs/kernfs/file.c:352
call_write_iter include/linux/fs.h:2265 [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: 0033:0x7f04b3b9e019
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:00007f04b4b27028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f04b3e25fa0 RCX: 00007f04b3b9e019
RDX: 0000000000000001 RSI: 0000200000000200 RDI: 0000000000000004
RBP: 00007f04b3c3500c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f04b3e26038 R14: 00007f04b3e25fa0 R15: 00007ffc51c41738
</TASK>
---
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 syzk...@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
syzbot
Aug 2, 2026, 10:13:34 AM (yesterday) Aug 2
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: fb28aa725e05 Linux 6.1.180
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1799f4c6580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1059f4c6580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/9a6fe2a54d0f/disk-fb28aa72.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/742b23a1d931/vmlinux-fb28aa72.xz
kernel image: https://storage.googleapis.com/syzbot-assets/b3f257c16d2e/bzImage-fb28aa72.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e2b165...@syzkaller.appspotmail.com
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4423 at drivers/virtio/virtio.c:335 virtio_dev_remove+0x16f/0x1a0 drivers/virtio/virtio.c:335
Modules linked in:
CPU: 0 PID: 4423 Comm: syz.0.17 Not tainted syzkaller #0
RAX: ffffffff8473666f RBX: ffff88801d732500 RCX: ffff888079798000
RDX: 0000000000000000 RSI: 00000000000000ff RDI: 0000000000000000
R13: dffffc0000000000 R14: ffff88801d732000 R15: ffffffff8aeb95b8
FS: 00005555862fa500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
RIP: 0033:0x7f43d4b9e019
RAX: ffffffffffffffda RBX: 00007f43d4e25fa0 RCX: 00007f43d4b9e019
</TASK>
---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
HEAD commit: fb28aa725e05 Linux 6.1.180
git tree: linux-6.1.y
kernel config: https://syzkaller.appspot.com/x/.config?x=31dfefc4a14efea3
dashboard link: https://syzkaller.appspot.com/bug?extid=e2b16532e54989c38312
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14c74649580000
dashboard link: https://syzkaller.appspot.com/bug?extid=e2b16532e54989c38312
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1059f4c6580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/9a6fe2a54d0f/disk-fb28aa72.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/742b23a1d931/vmlinux-fb28aa72.xz
kernel image: https://storage.googleapis.com/syzbot-assets/b3f257c16d2e/bzImage-fb28aa72.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e2b165...@syzkaller.appspotmail.com
------------[ cut here ]------------
Modules linked in:
CPU: 0 PID: 4423 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:virtio_dev_remove+0x16f/0x1a0 drivers/virtio/virtio.c:335
Code: 08 48 89 df e8 92 f4 5f fd 4c 89 f7 ff 13 0c 01 0f b6 f0 4c 89 f7 4c 89 e0 5b 41 5c 41 5d 41 5e 41 5f 5d ff e0 e8 b1 c7 0e fd <0f> 0b e9 78 ff ff ff 44 89 e9 80 e1 07 38 c1 0f 8c d8 fe ff ff 4c
RSP: 0018:ffffc900032378c0 EFLAGS: 00010293
RIP: 0010:virtio_dev_remove+0x16f/0x1a0 drivers/virtio/virtio.c:335
Code: 08 48 89 df e8 92 f4 5f fd 4c 89 f7 ff 13 0c 01 0f b6 f0 4c 89 f7 4c 89 e0 5b 41 5c 41 5d 41 5e 41 5f 5d ff e0 e8 b1 c7 0e fd <0f> 0b e9 78 ff ff ff 44 89 e9 80 e1 07 38 c1 0f 8c d8 fe ff ff 4c
RAX: ffffffff8473666f RBX: ffff88801d732500 RCX: ffff888079798000
RDX: 0000000000000000 RSI: 00000000000000ff RDI: 0000000000000000
RBP: 00000000000000ff R08: ffffffff90b10277 R09: 1ffffffff216204e
R10: dffffc0000000000 R11: fffffbfff216204f R12: 1ffff11003ae64a0
R13: dffffc0000000000 R14: ffff88801d732000 R15: ffffffff8aeb95b8
FS: 00005555862fa500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562b8738c950 CR3: 000000007f46a000 CR4: 00000000003506f0
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:00007fff6f46f2e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f43d4e25fa0 RCX: 00007f43d4b9e019
RDX: 0000000000000001 RSI: 0000200000000200 RDI: 0000000000000004
RBP: 00007f43d4c3500c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f43d4e25fac R14: 00007f43d4e25fa0 R15: 00007f43d4e25fa0
</TASK>
---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
syzbot
Aug 2, 2026, 6:27:34 PM (24 hours ago) Aug 2
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 6e2fd6534337 Linux 5.15.213
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=12016c9e580000
kernel config: https://syzkaller.appspot.com/x/.config?x=f161cbc9aef65db0
dashboard link: https://syzkaller.appspot.com/bug?extid=46f7ea574c366bf45e24
disk image: https://storage.googleapis.com/syzbot-assets/d7b46606b13d/disk-6e2fd653.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/da120fdeb081/vmlinux-6e2fd653.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3c2643457e3f/bzImage-6e2fd653.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+46f7ea...@syzkaller.appspotmail.com
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5450 at drivers/virtio/virtio.c:303 virtio_dev_remove+0x171/0x1a0 drivers/virtio/virtio.c:303
Modules linked in:
CPU: 0 PID: 5450 Comm: syz.6.283 Not tainted syzkaller #0
Code: 08 48 89 df e8 10 bf 7b fd 4c 89 f7 ff 13 0c 01 0f b6 f0 4c 89 f7 4c 89 e0 5b 41 5c 41 5d 41 5e 41 5f 5d ff e0 e8 2f 9c 36 fd <0f> 0b e9 76 ff ff ff 44 89 e9 80 e1 07 38 c1 0f 8c d6 fe ff ff 4c
RSP: 0018:ffffc9000348f8a0 EFLAGS: 00010246
RAX: ffffffff84426081 RBX: ffff88801e83c5c8 RCX: 0000000000080000
RDX: ffffc90016c40000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: 00000000000000ff R08: ffffffff901ee0f7 R09: 1ffffffff203dc1e
R10: dffffc0000000000 R11: fffffbfff203dc1f R12: 1ffff11003d078b9
R13: dffffc0000000000 R14: ffff88801e83c000 R15: ffffffff8a866378
FS: 00007f1143dc56c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
device_release_driver_internal+0x44c/0x710 drivers/base/dd.c:1282
bus_remove_device+0x2dd/0x400 drivers/base/bus.c:531
device_del+0x63f/0xa80 drivers/base/core.c:3615
device_unregister+0x1c/0xc0 drivers/base/core.c:3660
unregister_virtio_device+0x33/0x60 drivers/virtio/virtio.c:449
virtio_pci_remove+0x7b/0xe0 drivers/virtio/virtio_pci_common.c:589
pci_device_remove+0x93/0x230 drivers/pci/pci-driver.c:471
__device_release_driver drivers/base/dd.c:1247 [inline]
device_release_driver_internal+0x44c/0x710 drivers/base/dd.c:1282
pci_stop_dev drivers/pci/remove.c:23 [inline]
pci_stop_bus_device+0x108/0x140 drivers/pci/remove.c:83
pci_stop_and_remove_bus_device drivers/pci/remove.c:117 [inline]
pci_stop_and_remove_bus_device_locked+0x16/0x30 drivers/pci/remove.c:125
remove_store+0xe2/0x140 drivers/pci/pci-sysfs.c:494
kernfs_fop_write_iter+0x3a8/0x500 fs/kernfs/file.c:296
call_write_iter include/linux/fs.h:2173 [inline]
new_sync_write fs/read_write.c:507 [inline]
vfs_write+0x748/0xd70 fs/read_write.c:594
ksys_write+0x153/0x260 fs/read_write.c:647
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f1145b8e019
RAX: ffffffffffffffda RBX: 00007f1145e16090 RCX: 00007f1145b8e019
RDX: 0000000000000001 RSI: 0000200000000200 RDI: 000000000000000a
RBP: 00007f1145c2500c R08: 0000000000000000 R09: 0000000000000000
syzbot found the following issue on:
HEAD commit: 6e2fd6534337 Linux 5.15.213
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=12016c9e580000
kernel config: https://syzkaller.appspot.com/x/.config?x=f161cbc9aef65db0
dashboard link: https://syzkaller.appspot.com/bug?extid=46f7ea574c366bf45e24
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/d7b46606b13d/disk-6e2fd653.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/da120fdeb081/vmlinux-6e2fd653.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3c2643457e3f/bzImage-6e2fd653.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5450 at drivers/virtio/virtio.c:303 virtio_dev_remove+0x171/0x1a0 drivers/virtio/virtio.c:303
Modules linked in:
CPU: 0 PID: 5450 Comm: syz.6.283 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:virtio_dev_remove+0x171/0x1a0 drivers/virtio/virtio.c:303
Code: 08 48 89 df e8 10 bf 7b fd 4c 89 f7 ff 13 0c 01 0f b6 f0 4c 89 f7 4c 89 e0 5b 41 5c 41 5d 41 5e 41 5f 5d ff e0 e8 2f 9c 36 fd <0f> 0b e9 76 ff ff ff 44 89 e9 80 e1 07 38 c1 0f 8c d6 fe ff ff 4c
RSP: 0018:ffffc9000348f8a0 EFLAGS: 00010246
RAX: ffffffff84426081 RBX: ffff88801e83c5c8 RCX: 0000000000080000
RDX: ffffc90016c40000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: 00000000000000ff R08: ffffffff901ee0f7 R09: 1ffffffff203dc1e
R10: dffffc0000000000 R11: fffffbfff203dc1f R12: 1ffff11003d078b9
R13: dffffc0000000000 R14: ffff88801e83c000 R15: ffffffff8a866378
FS: 00007f1143dc56c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005586a1109d51 CR3: 000000002a528000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__device_release_driver drivers/base/dd.c:1247 [inline]
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
device_release_driver_internal+0x44c/0x710 drivers/base/dd.c:1282
bus_remove_device+0x2dd/0x400 drivers/base/bus.c:531
device_del+0x63f/0xa80 drivers/base/core.c:3615
device_unregister+0x1c/0xc0 drivers/base/core.c:3660
unregister_virtio_device+0x33/0x60 drivers/virtio/virtio.c:449
virtio_pci_remove+0x7b/0xe0 drivers/virtio/virtio_pci_common.c:589
pci_device_remove+0x93/0x230 drivers/pci/pci-driver.c:471
__device_release_driver drivers/base/dd.c:1247 [inline]
device_release_driver_internal+0x44c/0x710 drivers/base/dd.c:1282
pci_stop_dev drivers/pci/remove.c:23 [inline]
pci_stop_bus_device+0x108/0x140 drivers/pci/remove.c:83
pci_stop_and_remove_bus_device drivers/pci/remove.c:117 [inline]
pci_stop_and_remove_bus_device_locked+0x16/0x30 drivers/pci/remove.c:125
remove_store+0xe2/0x140 drivers/pci/pci-sysfs.c:494
kernfs_fop_write_iter+0x3a8/0x500 fs/kernfs/file.c:296
call_write_iter include/linux/fs.h:2173 [inline]
new_sync_write fs/read_write.c:507 [inline]
vfs_write+0x748/0xd70 fs/read_write.c:594
ksys_write+0x153/0x260 fs/read_write.c:647
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f1145b8e019
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:00007f1143dc5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f1145e16090 RCX: 00007f1145b8e019
RDX: 0000000000000001 RSI: 0000200000000200 RDI: 000000000000000a
RBP: 00007f1145c2500c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1145e16128 R14: 00007f1145e16090 R15: 00007ffed527f4f8
syzbot
Aug 2, 2026, 7:23:46 PM (23 hours ago) Aug 2
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: 6e2fd6534337 Linux 5.15.213
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=17e96c9e580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1065c649580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/d7b46606b13d/disk-6e2fd653.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/da120fdeb081/vmlinux-6e2fd653.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3c2643457e3f/bzImage-6e2fd653.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+46f7ea...@syzkaller.appspotmail.com
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4360 at drivers/virtio/virtio.c:303 virtio_dev_remove+0x171/0x1a0 drivers/virtio/virtio.c:303
Modules linked in:
CPU: 0 PID: 4360 Comm: syz.0.17 Not tainted syzkaller #0
RAX: ffffffff84426081 RBX: ffff88801e5f05c8 RCX: ffff888022e7d940
R13: dffffc0000000000 R14: ffff88801e5f0000 R15: ffffffff8a866378
FS: 0000555586e09500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
RIP: 0033:0x7fb1f9995019
RAX: ffffffffffffffda RBX: 00007fb1f9c1cfa0 RCX: 00007fb1f9995019
RDX: 0000000000000001 RSI: 0000200000000200 RDI: 0000000000000004
RBP: 00007fb1f9a2c00c R08: 0000000000000000 R09: 0000000000000000
HEAD commit: 6e2fd6534337 Linux 5.15.213
git tree: linux-5.15.y
kernel config: https://syzkaller.appspot.com/x/.config?x=f161cbc9aef65db0
dashboard link: https://syzkaller.appspot.com/bug?extid=46f7ea574c366bf45e24
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17960cc6580000
dashboard link: https://syzkaller.appspot.com/bug?extid=46f7ea574c366bf45e24
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1065c649580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/d7b46606b13d/disk-6e2fd653.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/da120fdeb081/vmlinux-6e2fd653.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3c2643457e3f/bzImage-6e2fd653.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+46f7ea...@syzkaller.appspotmail.com
------------[ cut here ]------------
Modules linked in:
CPU: 0 PID: 4360 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:virtio_dev_remove+0x171/0x1a0 drivers/virtio/virtio.c:303
Code: 08 48 89 df e8 10 bf 7b fd 4c 89 f7 ff 13 0c 01 0f b6 f0 4c 89 f7 4c 89 e0 5b 41 5c 41 5d 41 5e 41 5f 5d ff e0 e8 2f 9c 36 fd <0f> 0b e9 76 ff ff ff 44 89 e9 80 e1 07 38 c1 0f 8c d6 fe ff ff 4c
RSP: 0000:ffffc9000322f8a0 EFLAGS: 00010293
RIP: 0010:virtio_dev_remove+0x171/0x1a0 drivers/virtio/virtio.c:303
Code: 08 48 89 df e8 10 bf 7b fd 4c 89 f7 ff 13 0c 01 0f b6 f0 4c 89 f7 4c 89 e0 5b 41 5c 41 5d 41 5e 41 5f 5d ff e0 e8 2f 9c 36 fd <0f> 0b e9 76 ff ff ff 44 89 e9 80 e1 07 38 c1 0f 8c d6 fe ff ff 4c
RAX: ffffffff84426081 RBX: ffff88801e5f05c8 RCX: ffff888022e7d940
RDX: 0000000000000000 RSI: 00000000000000ff RDI: 0000000000000000
RBP: 00000000000000ff R08: ffffffff901ee0f7 R09: 1ffffffff203dc1e
R10: dffffc0000000000 R11: fffffbfff203dc1f R12: 1ffff11003cbe0b9
R13: dffffc0000000000 R14: ffff88801e5f0000 R15: ffffffff8a866378
FS: 0000555586e09500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000559b5e145950 CR3: 00000000257c2000 CR4: 00000000003506f0
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:00007ffea790c3a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fb1f9c1cfa0 RCX: 00007fb1f9995019
RDX: 0000000000000001 RSI: 0000200000000200 RDI: 0000000000000004
RBP: 00007fb1f9a2c00c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb1f9c1cfac R14: 00007fb1f9c1cfa0 R15: 00007fb1f9c1cfa0
syzbot
4:22 AM (14 hours ago) 4:22 AM
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: a1153c0deb44 Linux 6.6.147
git tree: linux-6.6.y
console output: https://syzkaller.appspot.com/x/log.txt?x=12762649580000
kernel config: https://syzkaller.appspot.com/x/.config?x=f0bc3d90c30838b5
dashboard link: https://syzkaller.appspot.com/bug?extid=3d4ccbae115fec137424
disk image: https://storage.googleapis.com/syzbot-assets/9f646bfa1b52/disk-a1153c0d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/a2aec2e8f0fd/vmlinux-a1153c0d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a7abe1f87405/bzImage-a1153c0d.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3d4ccb...@syzkaller.appspotmail.com
------------[ cut here ]------------
WARNING: CPU: 1 PID: 5835 at drivers/virtio/virtio.c:335 virtio_dev_remove+0x173/0x1a0 drivers/virtio/virtio.c:335
Modules linked in:
CPU: 1 PID: 5835 Comm: syz.3.4 Not tainted syzkaller #0
Code: 08 48 89 df e8 1e 02 44 fd 4c 89 f7 ff 13 0c 01 0f b6 f0 4c 89 f7 4c 89 e0 5b 41 5c 41 5d 41 5e 41 5f 5d ff e0 e8 ad 84 eb fc <0f> 0b e9 78 ff ff ff 44 89 e9 80 e1 07 38 c1 0f 8c d8 fe ff ff 4c
RSP: 0018:ffffc90004827858 EFLAGS: 00010246
RAX: ffffffff849bea73 RBX: ffff88801bb95548 RCX: 0000000000080000
RDX: ffffc9000d362000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: 00000000000000ff R08: ffffffff911eb537 R09: 1ffffffff223d6a6
R10: dffffc0000000000 R11: fffffbfff223d6a7 R12: 1ffff11003772aa9
R13: dffffc0000000000 R14: ffff88801bb95000 R15: ffffffff8b28b378
FS: 00007f498026d6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
Call Trace:
<TASK>
device_remove drivers/base/dd.c:626 [inline]
__device_release_driver drivers/base/dd.c:1351 [inline]
device_release_driver_internal+0x408/0x6f0 drivers/base/dd.c:1374
bus_remove_device+0x43b/0x520 drivers/base/bus.c:624
device_del+0x51f/0x910 drivers/base/core.c:3889
device_unregister+0x20/0xc0 drivers/base/core.c:3930
unregister_virtio_device+0x37/0x60 drivers/virtio/virtio.c:483
virtio_pci_remove+0x7f/0xf0 drivers/virtio/virtio_pci_common.c:598
pci_device_remove+0x97/0x230 drivers/pci/pci-driver.c:483
device_remove drivers/base/dd.c:626 [inline]
__device_release_driver drivers/base/dd.c:1351 [inline]
device_release_driver_internal+0x408/0x6f0 drivers/base/dd.c:1374
pci_stop_dev drivers/pci/remove.c:22 [inline]
pci_stop_bus_device+0x108/0x140 drivers/pci/remove.c:84
pci_stop_and_remove_bus_device drivers/pci/remove.c:118 [inline]
pci_stop_and_remove_bus_device_locked+0x1a/0x30 drivers/pci/remove.c:126
remove_store+0xe6/0x150 drivers/pci/pci-sysfs.c:515
kernfs_fop_write_iter+0x3a4/0x520 fs/kernfs/file.c:352
call_write_iter include/linux/fs.h:2018 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x474/0x9a0 fs/read_write.c:584
ksys_write+0x151/0x260 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f497f39e019
RAX: ffffffffffffffda RBX: 00007f497f625fa0 RCX: 00007f497f39e019
RDX: 0000000000000001 RSI: 0000200000000200 RDI: 000000000000000a
RBP: 00007f497f43500c R08: 0000000000000000 R09: 0000000000000000
syzbot found the following issue on:
HEAD commit: a1153c0deb44 Linux 6.6.147
git tree: linux-6.6.y
console output: https://syzkaller.appspot.com/x/log.txt?x=12762649580000
kernel config: https://syzkaller.appspot.com/x/.config?x=f0bc3d90c30838b5
dashboard link: https://syzkaller.appspot.com/bug?extid=3d4ccbae115fec137424
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/9f646bfa1b52/disk-a1153c0d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/a2aec2e8f0fd/vmlinux-a1153c0d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a7abe1f87405/bzImage-a1153c0d.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 5835 at drivers/virtio/virtio.c:335 virtio_dev_remove+0x173/0x1a0 drivers/virtio/virtio.c:335
Modules linked in:
CPU: 1 PID: 5835 Comm: syz.3.4 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:virtio_dev_remove+0x173/0x1a0 drivers/virtio/virtio.c:335
Code: 08 48 89 df e8 1e 02 44 fd 4c 89 f7 ff 13 0c 01 0f b6 f0 4c 89 f7 4c 89 e0 5b 41 5c 41 5d 41 5e 41 5f 5d ff e0 e8 ad 84 eb fc <0f> 0b e9 78 ff ff ff 44 89 e9 80 e1 07 38 c1 0f 8c d8 fe ff ff 4c
RSP: 0018:ffffc90004827858 EFLAGS: 00010246
RAX: ffffffff849bea73 RBX: ffff88801bb95548 RCX: 0000000000080000
RDX: ffffc9000d362000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: 00000000000000ff R08: ffffffff911eb537 R09: 1ffffffff223d6a6
R10: dffffc0000000000 R11: fffffbfff223d6a7 R12: 1ffff11003772aa9
R13: dffffc0000000000 R14: ffff88801bb95000 R15: ffffffff8b28b378
FS: 00007f498026d6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5379b32cf0 CR3: 000000005f9f2000 CR4: 00000000003506e0
Call Trace:
<TASK>
device_remove drivers/base/dd.c:626 [inline]
__device_release_driver drivers/base/dd.c:1351 [inline]
device_release_driver_internal+0x408/0x6f0 drivers/base/dd.c:1374
bus_remove_device+0x43b/0x520 drivers/base/bus.c:624
device_del+0x51f/0x910 drivers/base/core.c:3889
device_unregister+0x20/0xc0 drivers/base/core.c:3930
unregister_virtio_device+0x37/0x60 drivers/virtio/virtio.c:483
virtio_pci_remove+0x7f/0xf0 drivers/virtio/virtio_pci_common.c:598
pci_device_remove+0x97/0x230 drivers/pci/pci-driver.c:483
device_remove drivers/base/dd.c:626 [inline]
__device_release_driver drivers/base/dd.c:1351 [inline]
device_release_driver_internal+0x408/0x6f0 drivers/base/dd.c:1374
pci_stop_dev drivers/pci/remove.c:22 [inline]
pci_stop_bus_device+0x108/0x140 drivers/pci/remove.c:84
pci_stop_and_remove_bus_device drivers/pci/remove.c:118 [inline]
pci_stop_and_remove_bus_device_locked+0x1a/0x30 drivers/pci/remove.c:126
remove_store+0xe6/0x150 drivers/pci/pci-sysfs.c:515
kernfs_fop_write_iter+0x3a4/0x520 fs/kernfs/file.c:352
call_write_iter include/linux/fs.h:2018 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x474/0x9a0 fs/read_write.c:584
ksys_write+0x151/0x260 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f497f39e019
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:00007f498026d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f497f625fa0 RCX: 00007f497f39e019
RDX: 0000000000000001 RSI: 0000200000000200 RDI: 000000000000000a
RBP: 00007f497f43500c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f497f626038 R14: 00007f497f625fa0 R15: 00007ffc88413c28
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