Messages in this thread | | | Date | Thu, 21 Sep 2023 02:36:53 -0700 | Subject | [syzbot] [tipc?] KMSAN: uninit-value in __tipc_nl_bearer_enable (2) | From | syzbot <> |
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Hello,
syzbot found the following issue on:
HEAD commit: 4a0fc73da97e Merge tag 's390-6.6-2' of git://git.kernel.or.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=15cc921c680000 kernel config: https://syzkaller.appspot.com/x/.config?x=a2fd75f3f45dd99 dashboard link: https://syzkaller.appspot.com/bug?extid=9425c47dccbcb4c17d51 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=1737422c680000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13c74c94680000
Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/28d14dd1284c/disk-4a0fc73d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/a5ca8dd87357/vmlinux-4a0fc73d.xz kernel image: https://storage.googleapis.com/syzbot-assets/c7dda831a503/bzImage-4a0fc73d.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+9425c47dccbcb4c17d51@syzkaller.appspotmail.com
===================================================== BUG: KMSAN: uninit-value in strscpy+0xc4/0x160 strscpy+0xc4/0x160 bearer_name_validate net/tipc/bearer.c:147 [inline] tipc_enable_bearer net/tipc/bearer.c:259 [inline] __tipc_nl_bearer_enable+0x634/0x2220 net/tipc/bearer.c:1043 tipc_nl_bearer_enable+0x3c/0x70 net/tipc/bearer.c:1052 genl_family_rcv_msg_doit net/netlink/genetlink.c:971 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1051 [inline] genl_rcv_msg+0x11ec/0x1290 net/netlink/genetlink.c:1066 netlink_rcv_skb+0x371/0x650 net/netlink/af_netlink.c:2545 genl_rcv+0x40/0x60 net/netlink/genetlink.c:1075 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0xf47/0x1250 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x1238/0x13d0 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [inline] sock_sendmsg net/socket.c:753 [inline] ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2540 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2594 __sys_sendmsg net/socket.c:2623 [inline] __do_sys_sendmsg net/socket.c:2632 [inline] __se_sys_sendmsg net/socket.c:2630 [inline] __x64_sys_sendmsg+0x307/0x490 net/socket.c:2630 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd
Uninit was created at: slab_post_alloc_hook+0x12f/0xb70 mm/slab.h:767 slab_alloc_node mm/slub.c:3478 [inline] kmem_cache_alloc_node+0x577/0xa80 mm/slub.c:3523 kmalloc_reserve+0x148/0x470 net/core/skbuff.c:559 __alloc_skb+0x318/0x740 net/core/skbuff.c:644 alloc_skb include/linux/skbuff.h:1286 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1214 [inline] netlink_sendmsg+0xb34/0x13d0 net/netlink/af_netlink.c:1885 sock_sendmsg_nosec net/socket.c:730 [inline] sock_sendmsg net/socket.c:753 [inline] ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2540 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2594 __sys_sendmsg net/socket.c:2623 [inline] __do_sys_sendmsg net/socket.c:2632 [inline] __se_sys_sendmsg net/socket.c:2630 [inline] __x64_sys_sendmsg+0x307/0x490 net/socket.c:2630 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd
CPU: 1 PID: 4993 Comm: syz-executor386 Not tainted 6.5.0-syzkaller-12145-g4a0fc73da97e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 =====================================================
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If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title
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