syzbot


KMSAN: uninit-value in __tipc_nl_bearer_enable (2)

Status: fixed on 2023/12/21 03:45
Subsystems: tipc
[Documentation on labels]
Reported-by: syzbot+9425c47dccbcb4c17d51@syzkaller.appspotmail.com
Fix commit: 19b3f72a41a8 tipc: Change nla_policy for bearer-related names to NLA_NUL_STRING
First crash: 254d, last: 196d
Discussions (3)
Title Replies (including bot) Last reply
[PATCH net v3] tipc: Change nla_policy for bearer-related names to NLA_NUL_STRING 3 (3) 2023/11/02 05:51
[PATCH] tipc: Fix uninit-value access in __tipc_nl_bearer_enable() 4 (4) 2023/10/04 16:36
[syzbot] [tipc?] KMSAN: uninit-value in __tipc_nl_bearer_enable (2) 0 (1) 2023/09/21 09:36
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KMSAN: uninit-value in __tipc_nl_bearer_enable tipc C 1288 450d 1978d 22/26 fixed on 2023/02/24 13:50
Last patch testing requests (4)
Created Duration User Patch Repo Result
2023/10/30 00:31 25m syoshida@redhat.com patch upstream OK log
2023/09/24 06:16 24m syoshida@redhat.com patch upstream OK log
2023/09/24 04:03 17m eadavis@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 4a0fc73da97e report log
2023/09/24 02:52 18m eadavis@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 4a0fc73da97e report log

Sample crash report:
=====================================================
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
=====================================================

Crashes (21):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/09/08 03:07 upstream 4a0fc73da97e 72324844 .config strace log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce KMSAN: uninit-value in __tipc_nl_bearer_enable
2023/11/05 07:06 upstream aea6bf908d73 500bfdc4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce KMSAN: uninit-value in __tipc_nl_bearer_enable
2023/11/02 07:34 upstream babe393974de 69904c9f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce KMSAN: uninit-value in __tipc_nl_bearer_enable
2023/10/28 12:07 upstream 888cf78c29e2 3c418d72 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce KMSAN: uninit-value in __tipc_nl_bearer_enable
2023/10/27 03:10 upstream 3a568e3a961b bf285f0c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce KMSAN: uninit-value in __tipc_nl_bearer_enable
2023/10/22 12:36 upstream 1acfd2bd3f0d 361b23dc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce KMSAN: uninit-value in __tipc_nl_bearer_enable
2023/10/17 16:25 upstream 213f891525c2 342b9c55 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce KMSAN: uninit-value in __tipc_nl_bearer_enable
2023/10/08 21:30 upstream b9ddbb0cde2a 5e837c76 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce KMSAN: uninit-value in __tipc_nl_bearer_enable
2023/10/07 13:26 upstream 82714078aee4 5e837c76 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce KMSAN: uninit-value in __tipc_nl_bearer_enable
2023/10/02 12:38 upstream 8a749fd1a872 8e26a358 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce KMSAN: uninit-value in __tipc_nl_bearer_enable
2023/09/30 16:15 upstream 9f3ebbef746f 8e26a358 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce KMSAN: uninit-value in __tipc_nl_bearer_enable
2023/09/30 03:51 upstream 71e58659bfc0 8e26a358 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce KMSAN: uninit-value in __tipc_nl_bearer_enable
2023/09/25 02:46 upstream 6465e260f487 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce KMSAN: uninit-value in __tipc_nl_bearer_enable
2023/09/24 01:26 upstream 3aba70aed91f 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce KMSAN: uninit-value in __tipc_nl_bearer_enable
2023/09/24 00:40 upstream 3aba70aed91f 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce KMSAN: uninit-value in __tipc_nl_bearer_enable
2023/09/20 02:01 upstream 2cf0f7156238 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce KMSAN: uninit-value in __tipc_nl_bearer_enable
2023/09/12 12:12 upstream 0bb80ecc33a8 59da8366 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce KMSAN: uninit-value in __tipc_nl_bearer_enable
2023/09/09 17:45 upstream 6099776f9f26 6654cf89 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce KMSAN: uninit-value in __tipc_nl_bearer_enable
2023/09/08 01:29 upstream 4a0fc73da97e 72324844 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce KMSAN: uninit-value in __tipc_nl_bearer_enable
2023/10/27 18:35 upstream 750b95887e56 bf285f0c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in __tipc_nl_bearer_enable
2023/10/17 16:09 upstream 213f891525c2 342b9c55 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in __tipc_nl_bearer_enable
* Struck through repros no longer work on HEAD.