8021q: adding VLAN 0 to HW filter on device team0 8021q: adding VLAN 0 to HW filter on device team0 8021q: adding VLAN 0 to HW filter on device team0 8021q: adding VLAN 0 to HW filter on device team0 ================================================================== BUG: KMSAN: kernel-infoleak in _copy_to_user+0x19a/0x230 lib/usercopy.c:33 CPU: 0 PID: 8311 Comm: syz-executor2 Not tainted 4.20.0-rc3+ #95 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+0x32d/0x480 lib/dump_stack.c:113 kmsan_report+0x12c/0x290 mm/kmsan/kmsan.c:683 kmsan_internal_check_memory+0x32a/0xa50 mm/kmsan/kmsan.c:743 kmsan_copy_to_user+0x78/0xd0 mm/kmsan/kmsan_hooks.c:634 _copy_to_user+0x19a/0x230 lib/usercopy.c:33 copy_to_user include/linux/uaccess.h:183 [inline] sctp_getsockopt_local_addrs net/sctp/socket.c:5998 [inline] sctp_getsockopt+0x15248/0x186f0 net/sctp/socket.c:7477 sock_common_getsockopt+0x13f/0x180 net/core/sock.c:2937 __sys_getsockopt+0x489/0x550 net/socket.c:1939 __do_sys_getsockopt net/socket.c:1950 [inline] __se_sys_getsockopt+0xe1/0x100 net/socket.c:1947 __x64_sys_getsockopt+0x62/0x80 net/socket.c:1947 do_syscall_64+0xcf/0x110 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x457569 Code: fd b3 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 b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff40a834c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457569 RDX: 000000000000006d RSI: 0000000000000084 RDI: 0000000000000003 RBP: 000000000072bfa0 R08: 0000000020000000 R09: 0000000000000000 R10: 00000000200002c0 R11: 0000000000000246 R12: 00007ff40a8356d4 R13: 00000000004c8010 R14: 00000000004ce498 R15: 00000000ffffffff Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:246 [inline] kmsan_save_stack mm/kmsan/kmsan.c:261 [inline] kmsan_internal_chain_origin+0x13d/0x240 mm/kmsan/kmsan.c:469 kmsan_memcpy_memmove_metadata+0x1a9/0xf70 mm/kmsan/kmsan.c:344 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:362 __msan_memcpy+0x61/0x70 mm/kmsan/kmsan_instr.c:162 sctp_getsockopt_local_addrs net/sctp/socket.c:5990 [inline] sctp_getsockopt+0x148ec/0x186f0 net/sctp/socket.c:7477 sock_common_getsockopt+0x13f/0x180 net/core/sock.c:2937 __sys_getsockopt+0x489/0x550 net/socket.c:1939 __do_sys_getsockopt net/socket.c:1950 [inline] __se_sys_getsockopt+0xe1/0x100 net/socket.c:1947 __x64_sys_getsockopt+0x62/0x80 net/socket.c:1947 do_syscall_64+0xcf/0x110 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:246 [inline] kmsan_save_stack mm/kmsan/kmsan.c:261 [inline] kmsan_internal_chain_origin+0x13d/0x240 mm/kmsan/kmsan.c:469 kmsan_memcpy_memmove_metadata+0x1a9/0xf70 mm/kmsan/kmsan.c:344 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:362 __msan_memcpy+0x61/0x70 mm/kmsan/kmsan_instr.c:162 sctp_getsockopt_local_addrs net/sctp/socket.c:5983 [inline] sctp_getsockopt+0x147e0/0x186f0 net/sctp/socket.c:7477 sock_common_getsockopt+0x13f/0x180 net/core/sock.c:2937 __sys_getsockopt+0x489/0x550 net/socket.c:1939 __do_sys_getsockopt net/socket.c:1950 [inline] __se_sys_getsockopt+0xe1/0x100 net/socket.c:1947 __x64_sys_getsockopt+0x62/0x80 net/socket.c:1947 do_syscall_64+0xcf/0x110 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:246 [inline] kmsan_save_stack mm/kmsan/kmsan.c:261 [inline] kmsan_internal_chain_origin+0x13d/0x240 mm/kmsan/kmsan.c:469 kmsan_memcpy_memmove_metadata+0x1a9/0xf70 mm/kmsan/kmsan.c:344 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:362 __msan_memcpy+0x61/0x70 mm/kmsan/kmsan_instr.c:162 sctp_add_bind_addr+0xfb/0x590 net/sctp/bind_addr.c:163 sctp_copy_local_addr_list+0x4e8/0x660 net/sctp/protocol.c:180 sctp_copy_one_addr+0x200/0xc10 net/sctp/bind_addr.c:449 sctp_bind_addr_copy+0x243/0x910 net/sctp/bind_addr.c:71 sctp_assoc_set_bind_addr_from_ep+0x21b/0x280 net/sctp/associola.c:1605 __sctp_connect+0x1233/0x1c30 net/sctp/socket.c:1196 __sctp_setsockopt_connectx net/sctp/socket.c:1349 [inline] sctp_setsockopt_connectx net/sctp/socket.c:1381 [inline] sctp_setsockopt+0x620a/0x13030 net/sctp/socket.c:4342 sock_common_setsockopt+0x13b/0x170 net/core/sock.c:2978 __sys_setsockopt+0x493/0x540 net/socket.c:1902 __do_sys_setsockopt net/socket.c:1913 [inline] __se_sys_setsockopt+0xdd/0x100 net/socket.c:1910 __x64_sys_setsockopt+0x62/0x80 net/socket.c:1910 do_syscall_64+0xcf/0x110 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:246 [inline] kmsan_internal_poison_shadow+0x6d/0x130 mm/kmsan/kmsan.c:170 kmsan_kmalloc+0xa1/0x100 mm/kmsan/kmsan_hooks.c:186 __kmalloc+0x14c/0x4d0 mm/slub.c:3825 kmalloc include/linux/slab.h:551 [inline] sctp_inet6addr_event+0x60e/0xbd0 net/sctp/ipv6.c:100 notifier_call_chain kernel/notifier.c:93 [inline] __atomic_notifier_call_chain kernel/notifier.c:183 [inline] atomic_notifier_call_chain+0x13d/0x240 kernel/notifier.c:193 inet6addr_notifier_call_chain+0x76/0x90 net/ipv6/addrconf_core.c:107 ipv6_add_addr+0x2597/0x2890 net/ipv6/addrconf.c:1115 add_addr+0x1a8/0x520 net/ipv6/addrconf.c:3044 sit_add_v4_addrs net/ipv6/addrconf.c:3105 [inline] addrconf_sit_config net/ipv6/addrconf.c:3348 [inline] addrconf_notify+0x49fa/0x6200 net/ipv6/addrconf.c:3539 notifier_call_chain kernel/notifier.c:93 [inline] __raw_notifier_call_chain kernel/notifier.c:394 [inline] raw_notifier_call_chain+0x13d/0x240 kernel/notifier.c:401 __dev_notify_flags+0x3da/0x860 net/core/dev.c:1733 dev_change_flags+0x1ac/0x230 net/core/dev.c:7569 do_setlink+0x165f/0x5ea0 net/core/rtnetlink.c:2492 rtnl_newlink+0x2ad7/0x35a0 net/core/rtnetlink.c:3111 rtnetlink_rcv_msg+0x1148/0x1540 net/core/rtnetlink.c:4947 netlink_rcv_skb+0x394/0x640 net/netlink/af_netlink.c:2477 rtnetlink_rcv+0x50/0x60 net/core/rtnetlink.c:4965 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0x1699/0x1740 net/netlink/af_netlink.c:1336 netlink_sendmsg+0x13c7/0x1440 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg net/socket.c:631 [inline] ___sys_sendmsg+0xe3b/0x1240 net/socket.c:2116 __sys_sendmsg net/socket.c:2154 [inline] __do_sys_sendmsg net/socket.c:2163 [inline] __se_sys_sendmsg+0x305/0x460 net/socket.c:2161 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2161 do_syscall_64+0xcf/0x110 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 Bytes 88-91 of 784 are uninitialized Memory access of size 784 starts at ffff888184d3dc00 Data copied to user address 00000000200002c8 ==================================================================