================================================================== BUG: KMSAN: uninit-value in batadv_netlink_dump_hardif+0x70d/0x880 net/batman-adv/netlink.c:967 CPU: 0 PID: 22344 Comm: syz-executor.5 Not tainted 5.2.0+ #15 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+0x191/0x1f0 lib/dump_stack.c:113 kmsan_report+0x162/0x2d0 mm/kmsan/kmsan_report.c:109 __msan_warning+0x75/0xe0 mm/kmsan/kmsan_instr.c:294 batadv_netlink_dump_hardif+0x70d/0x880 net/batman-adv/netlink.c:967 genl_lock_dumpit+0xc6/0x130 net/netlink/genetlink.c:482 netlink_dump+0xa84/0x1ab0 net/netlink/af_netlink.c:2249 __netlink_dump_start+0xa3a/0xb30 net/netlink/af_netlink.c:2357 genl_family_rcv_msg net/netlink/genetlink.c:572 [inline] genl_rcv_msg+0x1d9e/0x1f20 net/netlink/genetlink.c:654 netlink_rcv_skb+0x431/0x620 net/netlink/af_netlink.c:2482 genl_rcv+0x63/0x80 net/netlink/genetlink.c:665 netlink_unicast_kernel net/netlink/af_netlink.c:1307 [inline] netlink_unicast+0xf3e/0x1020 net/netlink/af_netlink.c:1333 netlink_sendmsg+0x127e/0x12f0 net/netlink/af_netlink.c:1922 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg net/socket.c:665 [inline] ___sys_sendmsg+0x12ff/0x13c0 net/socket.c:2286 __sys_sendmsg net/socket.c:2324 [inline] __do_sys_sendmsg net/socket.c:2333 [inline] __se_sys_sendmsg+0x305/0x460 net/socket.c:2331 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2331 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x459829 Code: fd b7 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 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f2d4c3c6c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459829 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2d4c3c76d4 R13: 00000000004c771b R14: 00000000004dce58 R15: 00000000ffffffff Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:187 [inline] kmsan_internal_poison_shadow+0x53/0xa0 mm/kmsan/kmsan.c:146 kmsan_slab_alloc+0xaa/0x120 mm/kmsan/kmsan_hooks.c:175 slab_alloc_node mm/slub.c:2771 [inline] __kmalloc_node_track_caller+0xc8f/0xf10 mm/slub.c:4389 __kmalloc_reserve net/core/skbuff.c:138 [inline] __alloc_skb+0x306/0xa10 net/core/skbuff.c:206 alloc_skb include/linux/skbuff.h:1055 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1179 [inline] netlink_sendmsg+0xb81/0x12f0 net/netlink/af_netlink.c:1897 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg net/socket.c:665 [inline] ___sys_sendmsg+0x12ff/0x13c0 net/socket.c:2286 __sys_sendmsg net/socket.c:2324 [inline] __do_sys_sendmsg net/socket.c:2333 [inline] __se_sys_sendmsg+0x305/0x460 net/socket.c:2331 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2331 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x63/0xe7 ==================================================================