================================================================== BUG: KMSAN: uninit-value in bond_xmit_roundrobin drivers/net/bonding/bond_main.c:3879 [inline] BUG: KMSAN: uninit-value in __bond_start_xmit drivers/net/bonding/bond_main.c:4156 [inline] BUG: KMSAN: uninit-value in bond_start_xmit+0x199b/0x2c30 drivers/net/bonding/bond_main.c:4190 CPU: 0 PID: 15365 Comm: syz-executor.1 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 bond_xmit_roundrobin drivers/net/bonding/bond_main.c:3879 [inline] __bond_start_xmit drivers/net/bonding/bond_main.c:4156 [inline] bond_start_xmit+0x199b/0x2c30 drivers/net/bonding/bond_main.c:4190 __netdev_start_xmit include/linux/netdevice.h:4406 [inline] netdev_start_xmit include/linux/netdevice.h:4420 [inline] xmit_one net/core/dev.c:3288 [inline] dev_hard_start_xmit+0x51a/0xab0 net/core/dev.c:3304 __dev_queue_xmit+0x394d/0x4270 net/core/dev.c:3877 dev_queue_xmit+0x4b/0x60 net/core/dev.c:3910 packet_snd net/packet/af_packet.c:2941 [inline] packet_sendmsg+0x83f7/0x9290 net/packet/af_packet.c:2966 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg net/socket.c:665 [inline] ___sys_sendmsg+0x12ff/0x13c0 net/socket.c:2286 __sys_sendmmsg+0x53a/0xae0 net/socket.c:2381 __do_sys_sendmmsg net/socket.c:2410 [inline] __se_sys_sendmmsg+0xbd/0xe0 net/socket.c:2407 __x64_sys_sendmmsg+0x56/0x70 net/socket.c:2407 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:00007f0d47124c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000459829 RDX: 0000000000000001 RSI: 0000000020000480 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0d471256d4 R13: 00000000004c7058 R14: 00000000004dc600 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] alloc_skb_with_frags+0x18c/0xa80 net/core/skbuff.c:5328 sock_alloc_send_pskb+0xafd/0x10a0 net/core/sock.c:2219 packet_alloc_skb net/packet/af_packet.c:2789 [inline] packet_snd net/packet/af_packet.c:2884 [inline] packet_sendmsg+0x6627/0x9290 net/packet/af_packet.c:2966 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg net/socket.c:665 [inline] ___sys_sendmsg+0x12ff/0x13c0 net/socket.c:2286 __sys_sendmmsg+0x53a/0xae0 net/socket.c:2381 __do_sys_sendmmsg net/socket.c:2410 [inline] __se_sys_sendmmsg+0xbd/0xe0 net/socket.c:2407 __x64_sys_sendmmsg+0x56/0x70 net/socket.c:2407 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x63/0xe7 ==================================================================