================================================================== BUG: KMSAN: uninit-value in bond_xmit_roundrobin drivers/net/bonding/bond_main.c:3858 [inline] BUG: KMSAN: uninit-value in __bond_start_xmit drivers/net/bonding/bond_main.c:4136 [inline] BUG: KMSAN: uninit-value in bond_start_xmit+0x1ab8/0x2b90 drivers/net/bonding/bond_main.c:4170 CPU: 1 PID: 11078 Comm: syz-executor6 Not tainted 4.19.0-rc1+ #40 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+0x14b/0x190 lib/dump_stack.c:113 kmsan_report+0x183/0x2b0 mm/kmsan/kmsan.c:956 __msan_warning+0x70/0xc0 mm/kmsan/kmsan_instr.c:645 bond_xmit_roundrobin drivers/net/bonding/bond_main.c:3858 [inline] __bond_start_xmit drivers/net/bonding/bond_main.c:4136 [inline] bond_start_xmit+0x1ab8/0x2b90 drivers/net/bonding/bond_main.c:4170 __netdev_start_xmit include/linux/netdevice.h:4287 [inline] netdev_start_xmit include/linux/netdevice.h:4296 [inline] xmit_one net/core/dev.c:3217 [inline] dev_hard_start_xmit+0x5df/0xc20 net/core/dev.c:3233 __dev_queue_xmit+0x2f35/0x3ab0 net/core/dev.c:3803 dev_queue_xmit+0x4b/0x60 net/core/dev.c:3836 pppoe_sendmsg+0xb09/0xb50 drivers/net/ppp/pppoe.c:900 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg net/socket.c:631 [inline] ___sys_sendmsg+0xe70/0x1290 net/socket.c:2114 __sys_sendmmsg+0x4ac/0x930 net/socket.c:2209 __do_sys_sendmmsg net/socket.c:2238 [inline] __se_sys_sendmmsg+0xbd/0xe0 net/socket.c:2235 __x64_sys_sendmmsg+0x56/0x70 net/socket.c:2235 do_syscall_64+0xb8/0x100 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x457099 Code: fd b4 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 b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f31a50e0c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f31a50e16d4 RCX: 0000000000457099 RDX: 00000000000001b3 RSI: 00000000200000c0 RDI: 0000000000000003 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004d4440 R14: 00000000004c8b19 R15: 0000000000000000 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:256 [inline] kmsan_internal_poison_shadow+0xb8/0x1b0 mm/kmsan/kmsan.c:181 kmsan_kmalloc+0x98/0x100 mm/kmsan/kmsan_hooks.c:91 kmsan_slab_alloc+0x10/0x20 mm/kmsan/kmsan_hooks.c:100 slab_post_alloc_hook mm/slab.h:446 [inline] slab_alloc_node mm/slub.c:2719 [inline] __kmalloc_node_track_caller+0x9e7/0x1160 mm/slub.c:4352 __kmalloc_reserve net/core/skbuff.c:138 [inline] __alloc_skb+0x2f5/0x9e0 net/core/skbuff.c:206 alloc_skb include/linux/skbuff.h:996 [inline] sock_wmalloc+0x13e/0x6b0 net/core/sock.c:1934 pppoe_sendmsg+0x40e/0xb50 drivers/net/ppp/pppoe.c:867 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg net/socket.c:631 [inline] ___sys_sendmsg+0xe70/0x1290 net/socket.c:2114 __sys_sendmmsg+0x4ac/0x930 net/socket.c:2209 __do_sys_sendmmsg net/socket.c:2238 [inline] __se_sys_sendmmsg+0xbd/0xe0 net/socket.c:2235 __x64_sys_sendmmsg+0x56/0x70 net/socket.c:2235 do_syscall_64+0xb8/0x100 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 ==================================================================