Hello, syzbot found the following issue on: HEAD commit: 9bacdd8996c7 Merge tag 'for-6.7-rc1-tag' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1121f91f680000 kernel config: https://syzkaller.appspot.com/x/.config?x=84217b7fc4acdc59 dashboard link: https://syzkaller.appspot.com/bug?extid=51baee846ddab52d5230 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: https://storage.googleapis.com/syzbot-assets/8889f0a9f059/disk-9bacdd89.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/f78cb4c03467/vmlinux-9bacdd89.xz kernel image: https://storage.googleapis.com/syzbot-assets/bb88d4b4f745/bzImage-9bacdd89.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+51baee846ddab52d5230@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KASAN: null-ptr-deref in instrument_atomic_read include/linux/instrumented.h:68 [inline] BUG: KASAN: null-ptr-deref in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] BUG: KASAN: null-ptr-deref in ida_free+0x218/0x2e0 lib/idr.c:511 Read of size 8 at addr 0000000000000050 by task kworker/u5:2/5100 CPU: 0 PID: 5100 Comm: kworker/u5:2 Not tainted 6.7.0-rc1-syzkaller-00012-g9bacdd8996c7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 Workqueue: hci4 hci_error_reset Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 kasan_report+0xda/0x110 mm/kasan/report.c:588 check_region_inline mm/kasan/generic.c:181 [inline] kasan_check_range+0xef/0x190 mm/kasan/generic.c:187 instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] ida_free+0x218/0x2e0 lib/idr.c:511 hci_conn_cleanup net/bluetooth/hci_conn.c:157 [inline] hci_conn_del+0x78c/0xe10 net/bluetooth/hci_conn.c:1182 hci_conn_hash_flush+0x189/0x260 net/bluetooth/hci_conn.c:2615 hci_dev_close_sync+0x5a7/0x1160 net/bluetooth/hci_sync.c:5021 hci_dev_do_close+0x2e/0x90 net/bluetooth/hci_core.c:554 hci_error_reset+0xa6/0x190 net/bluetooth/hci_core.c:1059 process_one_work+0x886/0x15d0 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784 kthread+0x2c6/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 </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 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
