syzbot has found a reproducer for the following issue on: HEAD commit: 81c325bbf94e kmsan: hooks: do not check memory in kmsan_in.. git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=103ea4c7b00000 kernel config: https://syzkaller.appspot.com/x/.config?x=2d8b9a11641dc9aa dashboard link: https://syzkaller.appspot.com/bug?extid=8f84cf3ec5c288e779ef compiler: clang version 14.0.0 (/usr/local/google/src/llvm-git-monorepo 2b554920f11c8b763cd9ed9003f4e19b919b8e1f), GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10051b67b00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12148a3bb00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8f84cf3ec5c288e779ef@xxxxxxxxxxxxxxxxxxxxxxxxx ===================================================== BUG: KMSAN: uninit-value in hci_proto_connect_ind include/net/bluetooth/hci_core.h:1485 [inline] BUG: KMSAN: uninit-value in hci_conn_request_evt+0x22b/0x13c0 net/bluetooth/hci_event.c:2827 hci_proto_connect_ind include/net/bluetooth/hci_core.h:1485 [inline] hci_conn_request_evt+0x22b/0x13c0 net/bluetooth/hci_event.c:2827 hci_event_packet+0x1452/0x23e0 net/bluetooth/hci_event.c:6360 hci_rx_work+0x6a0/0xd00 net/bluetooth/hci_core.c:5084 process_one_work+0xdb9/0x1820 kernel/workqueue.c:2298 worker_thread+0x10bc/0x21f0 kernel/workqueue.c:2445 kthread+0x721/0x850 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 Uninit was created at: slab_post_alloc_hook mm/slab.h:524 [inline] slab_alloc_node mm/slub.c:3251 [inline] __kmalloc_node_track_caller+0xe0c/0x1510 mm/slub.c:4974 kmalloc_reserve net/core/skbuff.c:354 [inline] __alloc_skb+0x545/0xf90 net/core/skbuff.c:426 alloc_skb include/linux/skbuff.h:1126 [inline] bt_skb_alloc include/net/bluetooth/bluetooth.h:413 [inline] vhci_get_user drivers/bluetooth/hci_vhci.c:287 [inline] vhci_write+0x187/0x8f0 drivers/bluetooth/hci_vhci.c:407 call_write_iter include/linux/fs.h:2162 [inline] new_sync_write fs/read_write.c:503 [inline] vfs_write+0x1318/0x2030 fs/read_write.c:590 ksys_write+0x28b/0x510 fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __x64_sys_write+0xdb/0x120 fs/read_write.c:652 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x44/0xae CPU: 1 PID: 43 Comm: kworker/u5:0 Not tainted 5.16.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: hci0 hci_rx_work =====================================================
