netlink: 16 bytes leftover after parsing attributes in process `syz-executor1'. Unknown ioctl 35090 Unknown ioctl 35090 ================================================================== BUG: KMSAN: uninit-value in slab_alloc_node mm/slub.c:2704 [inline] BUG: KMSAN: uninit-value in __kmalloc_node_track_caller+0x667/0x1160 mm/slub.c:4352 CPU: 1 PID: 4724 Comm: sshd 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 slab_alloc_node mm/slub.c:2704 [inline] __kmalloc_node_track_caller+0x667/0x1160 mm/slub.c:4352 __kmalloc_reserve net/core/skbuff.c:138 [inline] __alloc_skb+0x2f5/0x9e0 net/core/skbuff.c:206 alloc_skb_fclone include/linux/skbuff.h:1038 [inline] sk_stream_alloc_skb+0x172/0xc90 net/ipv4/tcp.c:874 tcp_sendmsg_locked+0x269e/0x68f0 net/ipv4/tcp.c:1286 tcp_sendmsg+0xb2/0x100 net/ipv4/tcp.c:1443 inet_sendmsg+0x49a/0x740 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg net/socket.c:631 [inline] sock_write_iter+0x3b8/0x470 net/socket.c:900 IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready call_write_iter include/linux/fs.h:1807 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x7ae/0xa50 fs/read_write.c:487 vfs_write+0x495/0x8e0 fs/read_write.c:549 ksys_write fs/read_write.c:598 [inline] __do_sys_write fs/read_write.c:610 [inline] __se_sys_write+0x173/0x350 fs/read_write.c:607 __x64_sys_write+0x4a/0x70 fs/read_write.c:607 do_syscall_64+0xb8/0x100 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x7f7d5e3f9370 Code: 73 01 c3 48 8b 0d c8 4a 2b 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 83 3d 85 a2 2b 00 00 75 10 b8 01 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 0e 8a 01 00 48 89 04 24 RSP: 002b:00007ffce777c8a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000248 RCX: 00007f7d5e3f9370 RDX: 0000000000000248 RSI: 00005622684291e0 RDI: 0000000000000003 RBP: 00005622684291e0 R08: 0000000000000001 R09: 0101010101010101 R10: 0000000000000008 R11: 0000000000000246 R12: 00007ffce777c90c R13: 0000562266628fb4 R14: 0000000000000028 R15: 000056226662aca0 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] alloc_skb_with_frags+0x1d0/0xac0 net/core/skbuff.c:5276 sock_alloc_send_pskb+0xb47/0x1170 net/core/sock.c:2082 sock_alloc_send_skb+0xca/0xe0 net/core/sock.c:2099 mld_newpack+0x295/0xd20 net/ipv6/mcast.c:1610 add_grhead net/ipv6/mcast.c:1714 [inline] add_grec+0x1e40/0x22c0 net/ipv6/mcast.c:1845 mld_send_cr net/ipv6/mcast.c:1971 [inline] mld_ifc_timer_expire+0x1007/0x17b0 net/ipv6/mcast.c:2478 call_timer_fn+0x270/0x5b0 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0xd94/0x11a0 kernel/time/timer.c:1682 run_timer_softirq+0x2e/0x50 kernel/time/timer.c:1695 __do_softirq+0x562/0x948 kernel/softirq.c:292 ==================================================================