IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready
skbuff: skb_over_panic: text:000000004e9e2bdc len:56 put:8 head:00000000d36ffc3d data:000000000baef383 tail:0xc8 end:0xc0 dev:ip6tnl0
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:104!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
Modules linked in:
CPU: 0 PID: 20445 Comm: syz-executor.5 Not tainted 4.14.156-syzkaller #0
task: 00000000ccca646b task.stack: 0000000045d355e3
RIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:104
RSP: 0018:ffff8881dba079d8 EFLAGS: 00010286
RAX: 0000000000000085 RBX: ffff8881a603f500 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8e86a420 RDI: ffffed103b740f2d
RBP: ffffffff8ea8a0a0 R08: 0000000000000085 R09: ffffed103b744ce9
R10: ffffed103b744ce8 R11: ffff8881dba26747 R12: ffffffff8e18600e
R13: 0000000000000008 R14: ffff8881880ba200 R15: 00000000000000c0
FS:  00007fee0453b700(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f322000 CR3: 00000001c8560001 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 skb_over_panic net/core/skbuff.c:109 [inline]
 skb_put.cold+0x24/0x24 net/core/skbuff.c:1699
 mld_newpack+0x4ce/0x7a0 net/ipv6/mcast.c:1608
 add_grhead.isra.0+0x29c/0x370 net/ipv6/mcast.c:1691
 add_grec+0x6a3/0xf10 net/ipv6/mcast.c:1822
 mld_send_cr net/ipv6/mcast.c:1948 [inline]
 mld_ifc_timer_expire+0x340/0x7e0 net/ipv6/mcast.c:2455
 call_timer_fn+0x15b/0x6a0 kernel/time/timer.c:1279
 expire_timers+0x227/0x4c0 kernel/time/timer.c:1318
 __run_timers kernel/time/timer.c:1636 [inline]
 run_timer_softirq+0x1eb/0x5d0 kernel/time/timer.c:1649
 __do_softirq+0x234/0x9ec kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x114/0x150 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x1a7/0x650 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x8c/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0010:__raw_read_unlock include/linux/rwlock_api_smp.h:227 [inline]
RIP: 0010:_raw_read_unlock+0x30/0x40 kernel/locking/spinlock.c:256
RSP: 0018:ffff88815a41f128 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff10
RAX: 0000000080000000 RBX: ffff8881d521aa48 RCX: 0000000000000000
RDX: 0000000000000004 RSI: 0000000000000004 RDI: 0000000000000001
RBP: ffff8881d53036c0 R08: 0000000000000001 R09: ffffed103aa606d9
R10: ffffed103aa606d8 R11: ffff8881d53036c3 R12: 0000000000000001
R13: ffff88815a41f2e4 R14: ffff8881d521aa64 R15: 0000000000000000
 ext4_es_lookup_extent+0x34d/0xaf0 fs/ext4/extents_status.c:834
 ext4_map_blocks+0x13e/0x1600 fs/ext4/inode.c:526
 _ext4_get_block+0x1ea/0x4c0 fs/ext4/inode.c:789
 ext4_dio_get_block fs/ext4/inode.c:866 [inline]
 ext4_dio_get_block+0x93/0xb0 fs/ext4/inode.c:859
 get_more_blocks fs/direct-io.c:718 [inline]
 do_direct_IO fs/direct-io.c:1003 [inline]
 do_blockdev_direct_IO fs/direct-io.c:1336 [inline]
 __blockdev_direct_IO+0x30bd/0xe24e fs/direct-io.c:1422
 ext4_direct_IO_read fs/ext4/inode.c:3822 [inline]
 ext4_direct_IO+0xb36/0x2820 fs/ext4/inode.c:3883
 generic_file_read_iter+0x24a/0x1b70 mm/filemap.c:2290
 ext4_file_read_iter+0x119/0x180 fs/ext4/file.c:75
 call_read_iter include/linux/fs.h:1792 [inline]
 generic_file_splice_read+0x30d/0x540 fs/splice.c:307
 do_splice_to+0xfd/0x150 fs/splice.c:880
 splice_direct_to_actor+0x21a/0x760 fs/splice.c:952
 do_splice_direct+0x177/0x240 fs/splice.c:1061
 do_sendfile+0x493/0xb20 fs/read_write.c:1445
 SYSC_sendfile64 fs/read_write.c:1506 [inline]
 SyS_sendfile64+0x11f/0x140 fs/read_write.c:1492
 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45a679
RSP: 002b:00007fee0453ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000000045a679
RDX: 0000000000000000 RSI: 000000000000000e RDI: 0000000000000004
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 00008000fffffffe R11: 0000000000000246 R12: 00007fee0453b6d4
R13: 00000000004c8652 R14: 00000000004df368 R15: 00000000ffffffff
Code: 20 ff 4c 8b 4c 24 10 8b 4b 78 41 56 45 89 e8 4c 89 e2 41 57 48 89 ee 48 c7 c7 c0 9a a8 8e ff 74 24 10 ff 74 24 20 e8 49 a3 ee fe <0f> 0b e8 e7 7d fd fe 4c 8b 64 24 18 e8 bd 43 20 ff 48 c7 c1 60 
RIP: skb_panic+0x16c/0x16e net/core/skbuff.c:104 RSP: ffff8881dba079d8
---[ end trace a2c185bbe1ba9587 ]---