lkml.org 
[lkml]   [2024]   [Apr]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
Subject[syzbot] [virt?] [net?] KMSAN: uninit-value in vsock_assign_transport (2)
From
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@syzkaller.appspotmail.com

=====================================================
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@googlegroups.com.

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

\
 
 \ /
  Last update: 2024-05-27 16:46    [W:0.077 / U:21.960 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site