================================================================== BUG: KMSAN: uninit-value in batadv_interface_tx+0xdbb/0x1e40 net/batman-adv/soft-interface.c:272 CPU: 0 PID: 11401 Comm: syz-executor.4 Not tainted 5.0.0-rc1+ #9 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x173/0x1d0 lib/dump_stack.c:113 kmsan_report+0x12e/0x2a0 mm/kmsan/kmsan.c:600 __msan_warning+0x82/0xf0 mm/kmsan/kmsan_instr.c:313 batadv_interface_tx+0xdbb/0x1e40 net/batman-adv/soft-interface.c:272 __netdev_start_xmit include/linux/netdevice.h:4382 [inline] netdev_start_xmit include/linux/netdevice.h:4391 [inline] dev_direct_xmit+0x8a3/0xbb0 net/core/dev.c:3930 packet_direct_xmit+0x256/0x3e0 net/packet/af_packet.c:246 packet_snd net/packet/af_packet.c:2932 [inline] packet_sendmsg+0x79bb/0x9760 net/packet/af_packet.c:2957 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg net/socket.c:631 [inline] sock_write_iter+0x3f4/0x4d0 net/socket.c:900 call_write_iter include/linux/fs.h:1862 [inline] aio_write+0x7cd/0xa60 fs/aio.c:1581 __io_submit_one fs/aio.c:1860 [inline] io_submit_one+0x17de/0x3f90 fs/aio.c:1908 __do_sys_io_submit fs/aio.c:1953 [inline] __se_sys_io_submit+0x2aa/0x660 fs/aio.c:1923 __x64_sys_io_submit+0x4a/0x70 fs/aio.c:1923 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x457e29 Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff8076f7c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457e29 RDX: 0000000020000080 RSI: 0000000000000001 RDI: 00007ff8076b6000 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff8076f86d4 R13: 00000000004bf030 R14: 00000000004d0910 R15: 00000000ffffffff Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:205 [inline] kmsan_internal_poison_shadow+0x92/0x150 mm/kmsan/kmsan.c:159 kmsan_kmalloc+0xa6/0x130 mm/kmsan/kmsan_hooks.c:176 kmsan_slab_alloc+0xe/0x10 mm/kmsan/kmsan_hooks.c:185 slab_post_alloc_hook mm/slab.h:446 [inline] slab_alloc_node mm/slub.c:2754 [inline] slab_alloc mm/slub.c:2762 [inline] __kmalloc_track_caller+0xaa8/0xc70 mm/slub.c:4347 kmemdup+0x7a/0xf0 mm/util.c:111 neigh_sysctl_register+0xd2/0xcf0 net/core/neighbour.c:3593 addrconf_sysctl_register+0x156/0x370 net/ipv6/addrconf.c:6790 ipv6_add_dev+0x1be4/0x1f80 net/ipv6/addrconf.c:446 ipv6_find_idev net/ipv6/addrconf.c:482 [inline] inet6_rtm_newaddr+0xc1a/0x3a70 net/ipv6/addrconf.c:4738 rtnetlink_rcv_msg+0x115b/0x1550 net/core/rtnetlink.c:5130 netlink_rcv_skb+0x431/0x620 net/netlink/af_netlink.c:2477 rtnetlink_rcv+0x50/0x60 net/core/rtnetlink.c:5148 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0xf3e/0x1020 net/netlink/af_netlink.c:1336 netlink_sendmsg+0x127f/0x1300 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg net/socket.c:631 [inline] __sys_sendto+0x8c4/0xac0 net/socket.c:1788 __do_sys_sendto net/socket.c:1800 [inline] __se_sys_sendto+0x107/0x130 net/socket.c:1796 __x64_sys_sendto+0x6e/0x90 net/socket.c:1796 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 ==================================================================