===================================================== BUG: KMSAN: uninit-value in hsr_register_frame_in+0x210/0x270 net/hsr/hsr_framereg.c:396 CPU: 1 PID: 14497 Comm: syz-executor.4 Not tainted 5.9.0-rc4-syzkaller #0 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+0x21c/0x280 lib/dump_stack.c:118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:122 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:201 hsr_register_frame_in+0x210/0x270 net/hsr/hsr_framereg.c:396 hsr_forward_skb+0xeb1/0x2610 net/hsr/hsr_forward.c:540 hsr_dev_xmit+0x133/0x230 net/hsr/hsr_device.c:220 __netdev_start_xmit include/linux/netdevice.h:4634 [inline] netdev_start_xmit include/linux/netdevice.h:4648 [inline] xmit_one+0x3cf/0x750 net/core/dev.c:3561 dev_hard_start_xmit net/core/dev.c:3577 [inline] __dev_queue_xmit+0x3aad/0x4470 net/core/dev.c:4136 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4169 packet_snd net/packet/af_packet.c:2989 [inline] packet_sendmsg+0x8542/0x9a80 net/packet/af_packet.c:3014 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg net/socket.c:671 [inline] __sys_sendto+0x9dc/0xc80 net/socket.c:1992 __do_sys_sendto net/socket.c:2004 [inline] __se_sys_sendto+0x107/0x130 net/socket.c:2000 __x64_sys_sendto+0x6e/0x90 net/socket.c:2000 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45de29 Code: 0d 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 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fbcc6ba8c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 000000000002ea80 RCX: 000000000045de29 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 000000000118bf78 R08: 0000000020000000 R09: 0000000000000014 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c R13: 000000000169fb7f R14: 00007fbcc6ba99c0 R15: 000000000118bf2c Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:143 [inline] kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:311 __msan_chain_origin+0x50/0x90 mm/kmsan/kmsan_instr.c:151 hsr_fill_frame_info+0x464/0x570 net/hsr/hsr_forward.c:463 fill_frame_info net/hsr/hsr_forward.c:520 [inline] hsr_forward_skb+0xc63/0x2610 net/hsr/hsr_forward.c:537 hsr_dev_xmit+0x133/0x230 net/hsr/hsr_device.c:220 __netdev_start_xmit include/linux/netdevice.h:4634 [inline] netdev_start_xmit include/linux/netdevice.h:4648 [inline] xmit_one+0x3cf/0x750 net/core/dev.c:3561 dev_hard_start_xmit net/core/dev.c:3577 [inline] __dev_queue_xmit+0x3aad/0x4470 net/core/dev.c:4136 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4169 packet_snd net/packet/af_packet.c:2989 [inline] packet_sendmsg+0x8542/0x9a80 net/packet/af_packet.c:3014 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg net/socket.c:671 [inline] __sys_sendto+0x9dc/0xc80 net/socket.c:1992 __do_sys_sendto net/socket.c:2004 [inline] __se_sys_sendto+0x107/0x130 net/socket.c:2000 __x64_sys_sendto+0x6e/0x90 net/socket.c:2000 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:143 [inline] kmsan_internal_poison_shadow+0x66/0xd0 mm/kmsan/kmsan.c:126 kmsan_slab_alloc+0x8a/0xe0 mm/kmsan/kmsan_hooks.c:80 slab_alloc_node mm/slub.c:2907 [inline] __kmalloc_node_track_caller+0x9aa/0x12f0 mm/slub.c:4511 __kmalloc_reserve net/core/skbuff.c:142 [inline] __alloc_skb+0x35f/0xb30 net/core/skbuff.c:210 alloc_skb include/linux/skbuff.h:1094 [inline] alloc_skb_with_frags+0x1f2/0xc10 net/core/skbuff.c:5771 sock_alloc_send_pskb+0xc83/0xe50 net/core/sock.c:2348 packet_alloc_skb net/packet/af_packet.c:2837 [inline] packet_snd net/packet/af_packet.c:2932 [inline] packet_sendmsg+0x6abb/0x9a80 net/packet/af_packet.c:3014 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg net/socket.c:671 [inline] __sys_sendto+0x9dc/0xc80 net/socket.c:1992 __do_sys_sendto net/socket.c:2004 [inline] __se_sys_sendto+0x107/0x130 net/socket.c:2000 __x64_sys_sendto+0x6e/0x90 net/socket.c:2000 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48 entry_SYSCALL_64_after_hwframe+0x44/0xa9 =====================================================