================================================================== BUG: KMSAN: uninit-value in __rhashtable_lookup include/linux/rhashtable.h:505 [inline] BUG: KMSAN: uninit-value in rhashtable_lookup include/linux/rhashtable.h:534 [inline] BUG: KMSAN: uninit-value in br_mdb_ip_get+0x52b/0x740 net/bridge/br_multicast.c:97 CPU: 1 PID: 12968 Comm: syz-executor0 Not tainted 5.0.0-rc1+ #7 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+0x173/0x1d0 lib/dump_stack.c:113 kmsan_report+0x12e/0x2a0 mm/kmsan/kmsan.c:600 __msan_warning+0x82/0xf0 mm/kmsan/kmsan_instr.c:313 __rhashtable_lookup include/linux/rhashtable.h:505 [inline] rhashtable_lookup include/linux/rhashtable.h:534 [inline] br_mdb_ip_get+0x52b/0x740 net/bridge/br_multicast.c:97 br_multicast_new_group+0xa7/0x1640 net/bridge/br_multicast.c:467 br_multicast_add_group+0x242/0xf00 net/bridge/br_multicast.c:552 br_ip4_multicast_add_group net/bridge/br_multicast.c:606 [inline] br_ip4_multicast_igmp3_report net/bridge/br_multicast.c:972 [inline] br_multicast_ipv4_rcv net/bridge/br_multicast.c:1615 [inline] br_multicast_rcv+0x3a88/0x6560 net/bridge/br_multicast.c:1701 br_dev_xmit+0xbc5/0x16a0 net/bridge/br_device.c:93 __netdev_start_xmit include/linux/netdevice.h:4382 [inline] netdev_start_xmit include/linux/netdevice.h:4391 [inline] xmit_one net/core/dev.c:3278 [inline] dev_hard_start_xmit+0x604/0xc40 net/core/dev.c:3294 __dev_queue_xmit+0x2e48/0x3b80 net/core/dev.c:3864 dev_queue_xmit+0x4b/0x60 net/core/dev.c:3897 neigh_resolve_output+0xab7/0xb40 net/core/neighbour.c:1471 neigh_output include/net/neighbour.h:508 [inline] ip_finish_output2+0x1611/0x1820 net/ipv4/ip_output.c:229 ip_finish_output+0xd2b/0xfd0 net/ipv4/ip_output.c:317 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip_output+0x53f/0x610 net/ipv4/ip_output.c:405 dst_output include/net/dst.h:444 [inline] ip_local_out+0x164/0x1d0 net/ipv4/ip_output.c:124 igmpv3_sendpack net/ipv4/igmp.c:417 [inline] igmpv3_send_cr net/ipv4/igmp.c:705 [inline] igmp_ifc_timer_expire+0x12cb/0x1aa0 net/ipv4/igmp.c:793 call_timer_fn+0x285/0x600 kernel/time/timer.c:1325 expire_timers kernel/time/timer.c:1362 [inline] __run_timers+0xdb4/0x11d0 kernel/time/timer.c:1681 run_timer_softirq+0x2e/0x50 kernel/time/timer.c:1694 __do_softirq+0x53f/0x93a kernel/softirq.c:293 invoke_softirq kernel/softirq.c:375 [inline] irq_exit+0x214/0x250 kernel/softirq.c:416 exiting_irq+0xe/0x10 arch/x86/include/asm/apic.h:536 hrtimer: interrupt took 280972 ns smp_apic_timer_interrupt+0x48/0x70 arch/x86/kernel/apic/apic.c:1064 apic_timer_interrupt+0x2e/0x40 arch/x86/entry/entry_64.S:814 RIP: 0010:__msan_metadata_ptr_for_load_8+0x10/0x20 mm/kmsan/kmsan_instr.c:55 Code: 00 00 00 ba 01 00 00 00 e8 9d fa ff ff 5d c3 90 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 be 08 00 00 00 31 d2 e8 80 fa ff ff <5d> c3 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 be 08 RSP: 0018:ffff88802791f530 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: ffff8881253f89d0 RBX: 0000000000000000 RCX: ccccccccccccd000 RDX: ffff8881253f99d0 RSI: ffff888000000000 RDI: 0000000000000480 RBP: ffff88802791f530 R08: 0000000000000000 R09: 0000777f80000000 R10: ffffffff7fffffff R11: ffffffff8941ff50 R12: ffff888122a0c588 R13: ffff888123c3f9d0 R14: 8000000059456163 R15: 0000000000000000 vmalloc_to_page+0x4c4/0x6a0 mm/vmalloc.c:275 vmalloc_to_page_or_null mm/kmsan/kmsan.c:518 [inline] kmsan_get_shadow_origin_ptr+0x120/0x440 mm/kmsan/kmsan.c:827 __msan_metadata_ptr_for_load_8+0x10/0x20 mm/kmsan/kmsan_instr.c:55 do_slab_free mm/slub.c:2985 [inline] slab_free mm/slub.c:3008 [inline] kfree+0x710/0x2a10 mm/slub.c:3963 skb_free_head net/core/skbuff.c:553 [inline] skb_release_data+0x80f/0x8c0 net/core/skbuff.c:573 skb_release_all net/core/skbuff.c:627 [inline] __kfree_skb net/core/skbuff.c:641 [inline] kfree_skb+0x37a/0x530 net/core/skbuff.c:659 unix_dgram_sendmsg+0xdd6/0x3600 net/unix/af_unix.c:1816 unix_seqpacket_sendmsg+0x26c/0x2e0 net/unix/af_unix.c:2060 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg net/socket.c:631 [inline] ___sys_sendmsg+0xdb9/0x11b0 net/socket.c:2116 __sys_sendmmsg+0x580/0xad0 net/socket.c:2211 __do_sys_sendmmsg net/socket.c:2240 [inline] __se_sys_sendmmsg+0xbd/0xe0 net/socket.c:2237 __x64_sys_sendmmsg+0x56/0x70 net/socket.c:2237 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x457ec9 Code: 6d b7 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 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fe870293c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457ec9 RDX: 02c863dd0c5dbd45 RSI: 0000000020000040 RDI: 0000000000000003 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe8702946d4 R13: 00000000004c4ce5 R14: 00000000004d85d8 R15: 00000000ffffffff Local variable description: ----br_group.i.i@br_multicast_rcv Variable was created at: br_multicast_rcv+0x1e7/0x6560 net/bridge/br_multicast.c:1690 br_dev_xmit+0xbc5/0x16a0 net/bridge/br_device.c:93 ==================================================================