Hello, syzbot found the following issue on:
HEAD commit: 0af2f6be1b42 Linux 6.15-rc1 git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=14e26d78580000 kernel config: https://syzkaller.appspot.com/x/.config?x=7cfe1169d7fc8523 dashboard link: https://syzkaller.appspot.com/bug?extid=b07a9da40df1576b8048 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=1367bb4c580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1495d23f980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/7526e189e315/disk-0af2f6be.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/60a25cc98e41/vmlinux-0af2f6be.xz kernel image: https://storage.googleapis.com/syzbot-assets/2d7bf8af0faf/bzImage-0af2f6be.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b07a9da40df1576b8...@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in validate_set+0x1a2/0x1640 net/openvswitch/flow_netlink.c:2879 validate_set+0x1a2/0x1640 net/openvswitch/flow_netlink.c:2879 __ovs_nla_copy_actions+0x2efc/0x61a0 net/openvswitch/flow_netlink.c:3383 ovs_nla_copy_actions+0x36b/0x550 net/openvswitch/flow_netlink.c:3543 get_flow_actions+0x99/0x1d0 net/openvswitch/datapath.c:1148 ovs_nla_init_match_and_action+0x221/0x420 net/openvswitch/datapath.c:1198 ovs_flow_cmd_set+0x320/0xec0 net/openvswitch/datapath.c:1236 genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0x1214/0x12c0 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x375/0x650 net/netlink/af_netlink.c:2534 genl_rcv+0x40/0x60 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] netlink_unicast+0xf52/0x1260 net/netlink/af_netlink.c:1339 netlink_sendmsg+0x10da/0x11e0 net/netlink/af_netlink.c:1883 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg+0x30f/0x380 net/socket.c:727 ____sys_sendmsg+0x890/0xda0 net/socket.c:2566 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2620 __sys_sendmsg net/socket.c:2652 [inline] __do_sys_sendmsg net/socket.c:2657 [inline] __se_sys_sendmsg net/socket.c:2655 [inline] __x64_sys_sendmsg+0x212/0x3c0 net/socket.c:2655 x64_sys_call+0x2e0f/0x3c80 arch/x86/include/generated/asm/syscalls_64.h:47 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: slab_post_alloc_hook mm/slub.c:4157 [inline] slab_alloc_node mm/slub.c:4200 [inline] kmem_cache_alloc_node_noprof+0x921/0xe10 mm/slub.c:4252 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:577 __alloc_skb+0x366/0x7b0 net/core/skbuff.c:668 alloc_skb include/linux/skbuff.h:1340 [inline] netlink_alloc_large_skb+0x1b4/0x280 net/netlink/af_netlink.c:1187 netlink_sendmsg+0xa96/0x11e0 net/netlink/af_netlink.c:1858 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg+0x30f/0x380 net/socket.c:727 ____sys_sendmsg+0x890/0xda0 net/socket.c:2566 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2620 __sys_sendmsg net/socket.c:2652 [inline] __do_sys_sendmsg net/socket.c:2657 [inline] __se_sys_sendmsg net/socket.c:2655 [inline] __x64_sys_sendmsg+0x212/0x3c0 net/socket.c:2655 x64_sys_call+0x2e0f/0x3c80 arch/x86/include/generated/asm/syscalls_64.h:47 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 1 UID: 0 PID: 5787 Comm: syz-executor365 Not tainted 6.15.0-rc1-syzkaller #0 PREEMPT(undef) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 ===================================================== --- 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 syzkal...@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 _______________________________________________ dev mailing list d...@openvswitch.org https://mail.openvswitch.org/mailman/listinfo/ovs-dev
