Hello, syzbot found the following issue on: HEAD commit: b311c1b497e5 Merge tag '6.11-rc4-server-fixes' of git://gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10492dd3980000 kernel config: https://syzkaller.appspot.com/x/.config?x=4fc2afd52fd008bb dashboard link: https://syzkaller.appspot.com/bug?extid=5250d87dea2afdb718a5 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/d6f4c238ef76/disk-b311c1b4.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/41d5a1c1c348/vmlinux-b311c1b4.xz kernel image: https://storage.googleapis.com/syzbot-assets/86f62e4350b3/bzImage-b311c1b4.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5250d87dea2afdb718a5@xxxxxxxxxxxxxxxxxxxxxxxxx list_del corruption, ffff8880295c1780->next is LIST_POISON1 (dead000000000100) ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:58! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 1 UID: 0 PID: 54 Comm: kworker/u9:0 Not tainted 6.11.0-rc4-syzkaller-00019-gb311c1b497e5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Workqueue: hci1 hci_conn_timeout RIP: 0010:__list_del_entry_valid_or_report+0xf4/0x140 lib/list_debug.c:56 Code: e8 d1 20 fb 06 90 0f 0b 48 c7 c7 00 9d 3f 8c 4c 89 fe e8 bf 20 fb 06 90 0f 0b 48 c7 c7 60 9d 3f 8c 4c 89 fe e8 ad 20 fb 06 90 <0f> 0b 48 c7 c7 c0 9d 3f 8c 4c 89 fe e8 9b 20 fb 06 90 0f 0b 48 c7 RSP: 0018:ffffc90000be7ad0 EFLAGS: 00010246 RAX: 000000000000004e RBX: dead000000000122 RCX: d39b9f85a0f3fd00 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffff8880295c17a0 R08: ffffffff817402dc R09: 1ffff9200017cef8 R10: dffffc0000000000 R11: fffff5200017cef9 R12: dffffc0000000000 R13: ffff8880295c1780 R14: dead000000000100 R15: ffff8880295c1780 FS: 0000000000000000(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020001400 CR3: 0000000058c36000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 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] _hci_cmd_sync_cancel_entry net/bluetooth/hci_sync.c:643 [inline] hci_cmd_sync_cancel_entry net/bluetooth/hci_sync.c:809 [inline] hci_cmd_sync_dequeue_once+0x262/0x360 net/bluetooth/hci_sync.c:828 hci_cancel_connect_sync+0xc3/0x120 hci_abort_conn+0x194/0x330 net/bluetooth/hci_conn.c:2951 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd40 kernel/workqueue.c:3390 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__list_del_entry_valid_or_report+0xf4/0x140 lib/list_debug.c:56 Code: e8 d1 20 fb 06 90 0f 0b 48 c7 c7 00 9d 3f 8c 4c 89 fe e8 bf 20 fb 06 90 0f 0b 48 c7 c7 60 9d 3f 8c 4c 89 fe e8 ad 20 fb 06 90 <0f> 0b 48 c7 c7 c0 9d 3f 8c 4c 89 fe e8 9b 20 fb 06 90 0f 0b 48 c7 RSP: 0018:ffffc90000be7ad0 EFLAGS: 00010246 RAX: 000000000000004e RBX: dead000000000122 RCX: d39b9f85a0f3fd00 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffff8880295c17a0 R08: ffffffff817402dc R09: 1ffff9200017cef8 R10: dffffc0000000000 R11: fffff5200017cef9 R12: dffffc0000000000 R13: ffff8880295c1780 R14: dead000000000100 R15: ffff8880295c1780 FS: 0000000000000000(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020001400 CR3: 0000000058c36000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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@xxxxxxxxxxxxxxxx. 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
