IPv6: RTM_NEWROUTE with no NLM_F_CREATE or NLM_F_REPLACE
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 28166 Comm: syz-executor0 Not tainted 4.9.57-g9eaaf14 #69
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d1bde000 task.stack: ffff880194c78000
RIP: 0010:[<ffffffff8144df61>] 
 [<ffffffff8144df61>] __read_once_size include/linux/compiler.h:243 [inline]
 [<ffffffff8144df61>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
 [<ffffffff8144df61>] page_ref_count include/linux/page_ref.h:66 [inline]
 [<ffffffff8144df61>] put_page_testzero include/linux/mm.h:445 [inline]
 [<ffffffff8144df61>] __free_pages+0x21/0x80 mm/page_alloc.c:3901
RSP: 0018:ffff880194c7f9b0  EFLAGS: 00010a07
RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffc900026c7000
RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
RBP: ffff880194c7f9c0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 1ffff1003298ff18 R12: 0000000000000004
R13: 0000000000000020 R14: ffff8801da3b2100 R15: dffffc0000000000
FS:  00007f36e4d8b700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020e68ff0 CR3: 0000000196131000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801d1bde000
 ffff8801da3b2258 ffff880194c7fa20 ffffffff826601f1[  167.062155]  ffff8801da3b2270
 ffffed003b47644b ffffed003b47644e ffff8801da3b2268[  167.062167]  dead4ead00000000
 ffff8801da3b2240 0000000000000000 0000000000000000[  167.062176] Call Trace:
 [<ffffffff826601f1>] sg_remove_scat.isra.20+0x1c1/0x2d0 drivers/scsi/sg.c:1954
 [<ffffffff826605b5>] sg_finish_rem_req+0x2b5/0x340 drivers/scsi/sg.c:1836
 [<ffffffff82660679>] sg_new_read.isra.21+0x39/0x3e0 drivers/scsi/sg.c:567
 [<ffffffff82662256>] sg_read+0x8a6/0x1400 drivers/scsi/sg.c:456
 [<ffffffff8156af71>] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714
 [<ffffffff8156ed30>] do_loop_readv_writev fs/read_write.c:880 [inline]
 [<ffffffff8156ed30>] do_readv_writev+0x520/0x750 fs/read_write.c:874
 [<ffffffff8156efe4>] vfs_readv+0x84/0xc0 fs/read_write.c:898
 [<ffffffff8156f106>] do_readv+0xe6/0x250 fs/read_write.c:924
 [<ffffffff81572587>] SYSC_readv fs/read_write.c:1011 [inline]
 [<ffffffff81572587>] SyS_readv+0x27/0x30 fs/read_write.c:1008
 [<ffffffff838aa045>] entry_SYSCALL_64_fastpath+0x23/0xc6
Code: 
ff 66 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 48 89 fb 48 83 c7 1c 48 89 fa 48 83 ec 08 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 3d [  167.062537] RIP 
 [<ffffffff8144df61>] __read_once_size include/linux/compiler.h:243 [inline]
 [<ffffffff8144df61>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
 [<ffffffff8144df61>] page_ref_count include/linux/page_ref.h:66 [inline]
 [<ffffffff8144df61>] put_page_testzero include/linux/mm.h:445 [inline]
 [<ffffffff8144df61>] __free_pages+0x21/0x80 mm/page_alloc.c:3901
---[ end trace a6243f0cefc4821e ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
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Kernel Offset: disabled
Rebooting in 86400 seconds..