Hello, syzbot found the following issue on: HEAD commit: c42d9eeef8e5 Merge tag 'hardening-v6.7-rc2' of git://git.k.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=16867338e80000 kernel config: https://syzkaller.appspot.com/x/.config?x=fdfc68946ad7a215 dashboard link: https://syzkaller.appspot.com/bug?extid=5e132fbe94a9ede456ad compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=178f3388e80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13341388e80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/8c25bb76d765/disk-c42d9eee.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/80d9450a6b6a/vmlinux-c42d9eee.xz kernel image: https://storage.googleapis.com/syzbot-assets/4b1a54cf685f/bzImage-c42d9eee.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5e132fbe94a9ede456ad@xxxxxxxxxxxxxxxxxxxxxxxxx ===================================================== BUG: KMSAN: uninit-value in eir_get_data net/bluetooth/eir.h:73 [inline] BUG: KMSAN: uninit-value in eir_get_service_data+0x25c/0x570 net/bluetooth/eir.c:384 eir_get_data net/bluetooth/eir.h:73 [inline] eir_get_service_data+0x25c/0x570 net/bluetooth/eir.c:384 iso_connect_ind+0x2004/0x2330 net/bluetooth/iso.c:1794 hci_proto_connect_ind include/net/bluetooth/hci_core.h:1922 [inline] hci_le_per_adv_report_evt+0xc0/0x1e0 net/bluetooth/hci_event.c:6645 hci_le_meta_evt+0x608/0x860 net/bluetooth/hci_event.c:7344 hci_event_func net/bluetooth/hci_event.c:7674 [inline] hci_event_packet+0x1183/0x1be0 net/bluetooth/hci_event.c:7729 hci_rx_work+0x687/0x1120 net/bluetooth/hci_core.c:4105 process_one_work kernel/workqueue.c:2630 [inline] process_scheduled_works+0x104e/0x1e70 kernel/workqueue.c:2703 worker_thread+0xf45/0x1490 kernel/workqueue.c:2784 kthread+0x3ed/0x540 kernel/kthread.c:388 ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Uninit was created at: slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768 slab_alloc_node mm/slub.c:3478 [inline] kmem_cache_alloc_node+0x5e9/0xb10 mm/slub.c:3523 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:560 __alloc_skb+0x318/0x740 net/core/skbuff.c:651 alloc_skb include/linux/skbuff.h:1286 [inline] bt_skb_alloc include/net/bluetooth/bluetooth.h:487 [inline] vhci_get_user drivers/bluetooth/hci_vhci.c:495 [inline] vhci_write+0x126/0x8f0 drivers/bluetooth/hci_vhci.c:615 call_write_iter include/linux/fs.h:2020 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x8ef/0x1490 fs/read_write.c:584 ksys_write+0x20f/0x4c0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __x64_sys_write+0x93/0xd0 fs/read_write.c:646 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b CPU: 1 PID: 4386 Comm: kworker/u5:1 Not tainted 6.7.0-rc1-syzkaller-00019-gc42d9eeef8e5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 Workqueue: hci0 hci_rx_work ===================================================== --- 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 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. 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
