TITLE: KMSAN: uninit-value in tipc_nl_compat_link_set

[  110.801407] ==================================================================
[  110.808906] BUG: KMSAN: uninit-value in memchr+0xce/0x110
[  110.814441] CPU: 1 PID: 10859 Comm: syz-executor141 Not tainted 5.0.0+ #11
[  110.821436] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  110.830774] Call Trace:
[  110.833364]  dump_stack+0x173/0x1d0
[  110.836990]  kmsan_report+0x12e/0x2a0
[  110.840807]  __msan_warning+0x82/0xf0
[  110.844647]  memchr+0xce/0x110
[  110.847859]  tipc_nl_compat_link_set+0x121/0x1550
[  110.852697]  ? kmsan_get_shadow_origin_ptr+0x60/0x440
[  110.857892]  ? tipc_nl_compat_link_dump+0x5f0/0x5f0
[  110.862909]  tipc_nl_compat_doit+0x3aa/0xaf0
[  110.867314]  ? kmsan_get_shadow_origin_ptr+0x60/0x440
[  110.872521]  tipc_nl_compat_recv+0x1ae7/0x2750
[  110.877112]  ? tipc_nl_node_dump+0x1300/0x1300
[  110.881693]  ? tipc_nl_compat_link_dump+0x5f0/0x5f0
[  110.886719]  ? tipc_netlink_compat_stop+0x40/0x40
[  110.891595]  genl_rcv_msg+0x185f/0x1a60
[  110.895601]  netlink_rcv_skb+0x431/0x620
[  110.899653]  ? genl_unbind+0x390/0x390
[  110.903546]  genl_rcv+0x63/0x80
[  110.906835]  netlink_unicast+0xf3e/0x1020
[  110.910993]  netlink_sendmsg+0x127f/0x1300
[  110.915246]  ___sys_sendmsg+0xdb9/0x11b0
[  110.919307]  ? netlink_getsockopt+0x1460/0x1460
[  110.923979]  ? kmsan_get_shadow_origin_ptr+0x60/0x440
[  110.929165]  ? __msan_metadata_ptr_for_load_4+0x10/0x20
[  110.934523]  ? __fget_light+0x1fe/0x750
[  110.938522]  ? kmsan_get_shadow_origin_ptr+0x60/0x440
[  110.943712]  __se_sys_sendmsg+0x305/0x460
[  110.947878]  __x64_sys_sendmsg+0x4a/0x70
[  110.951943]  do_syscall_64+0xbc/0xf0
[  110.955650]  entry_SYSCALL_64_after_hwframe+0x63/0xe7
[  110.960826] RIP: 0033:0x440109
[  110.964009] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
[  110.982905] RSP: 002b:00007ffdbb8a05f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  110.990610] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440109
[  110.997867] RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000003
[  111.005126] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
[  111.012383] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401990
[  111.019641] R13: 0000000000401a20 R14: 0000000000000000 R15: 0000000000000000
[  111.026912] 
[  111.028533] Uninit was created at:
[  111.032069]  kmsan_internal_poison_shadow+0x92/0x150
[  111.037159]  kmsan_kmalloc+0xa6/0x130
[  111.040947]  kmsan_slab_alloc+0xe/0x10
[  111.044827]  __kmalloc_node_track_caller+0xe9e/0xff0
[  111.049941]  __alloc_skb+0x309/0xa20
[  111.053642]  netlink_sendmsg+0xb82/0x1300
[  111.057780]  ___sys_sendmsg+0xdb9/0x11b0
[  111.061841]  __se_sys_sendmsg+0x305/0x460
[  111.066010]  __x64_sys_sendmsg+0x4a/0x70
[  111.070077]  do_syscall_64+0xbc/0xf0
[  111.073786]  entry_SYSCALL_64_after_hwframe+0x63/0xe7
[  111.078972] ==================================================================