On Fri, Apr 19, 2024 at 02:39:20AM -0700, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 8cd26fd90c1a Merge tag 'for-6.9-rc4-tag' of git://git.kern.. > git tree: upstream > console+strace: https://syzkaller.appspot.com/x/log.txt?x=102d27cd180000 > kernel config: https://syzkaller.appspot.com/x/.config?x=87a805e655619c64 > dashboard link: https://syzkaller.appspot.com/bug?extid=6c21aeb59d0e82eb2782 > 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=16e38c3b180000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10e62fed180000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/488822aee24a/disk-8cd26fd9.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/ba40e322ba00/vmlinux-8cd26fd9.xz > kernel image: https://storage.googleapis.com/syzbot-assets/f30af1dfbc30/bzImage-8cd26fd9.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+6c21aeb59d0e82eb2782@xxxxxxxxxxxxxxxxxxxxxxxxx > > ===================================================== > BUG: KMSAN: uninit-value in vsock_assign_transport+0xb2a/0xb90 net/vmw_vsock/af_vsock.c:500 > vsock_assign_transport+0xb2a/0xb90 net/vmw_vsock/af_vsock.c:500 > vsock_connect+0x544/0x1560 net/vmw_vsock/af_vsock.c:1393 > __sys_connect_file net/socket.c:2048 [inline] > __sys_connect+0x606/0x690 net/socket.c:2065 > __do_sys_connect net/socket.c:2075 [inline] > __se_sys_connect net/socket.c:2072 [inline] > __x64_sys_connect+0x91/0xe0 net/socket.c:2072 > x64_sys_call+0x3356/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:43 > do_syscall_x64 arch/x86/entry/common.c:52 [inline] > do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > > Uninit was created at: > __kmalloc_large_node+0x231/0x370 mm/slub.c:3921 > __do_kmalloc_node mm/slub.c:3954 [inline] > __kmalloc_node+0xb07/0x1060 mm/slub.c:3973 > kmalloc_node include/linux/slab.h:648 [inline] > kvmalloc_node+0xc0/0x2d0 mm/util.c:634 > kvmalloc include/linux/slab.h:766 [inline] > vhost_vsock_dev_open+0x44/0x510 drivers/vhost/vsock.c:659 > misc_open+0x66b/0x760 drivers/char/misc.c:165 > chrdev_open+0xa5f/0xb80 fs/char_dev.c:414 > do_dentry_open+0x11f1/0x2120 fs/open.c:955 > vfs_open+0x7e/0xa0 fs/open.c:1089 > do_open fs/namei.c:3642 [inline] > path_openat+0x4a3c/0x5b00 fs/namei.c:3799 > do_filp_open+0x20e/0x590 fs/namei.c:3826 > do_sys_openat2+0x1bf/0x2f0 fs/open.c:1406 > do_sys_open fs/open.c:1421 [inline] > __do_sys_openat fs/open.c:1437 [inline] > __se_sys_openat fs/open.c:1432 [inline] > __x64_sys_openat+0x2a1/0x310 fs/open.c:1432 > x64_sys_call+0x3a64/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:258 > do_syscall_x64 arch/x86/entry/common.c:52 [inline] > do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > > CPU: 1 PID: 5021 Comm: syz-executor390 Not tainted 6.9.0-rc4-syzkaller-00038-g8cd26fd90c1a #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 > ===================================================== > > > --- > 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 #syz test: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git bcc17a060d93b198d8a17a9b87b593f41337ee28
