flags: 0x2fffc0000000000()
raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff
raw: ffffea0006c372a0 ffff8801daf2fdd8 0000000000000000 0000000000000000
page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) == 0)
------------[ cut here ]------------
kernel BUG at include/linux/mm.h:492!
invalid opcode: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 4498 Comm: syz-executor0 Not tainted 4.17.0-rc4+ #44
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:put_page_testzero include/linux/mm.h:492 [inline]
RIP: 0010:__free_pages+0x14f/0x180 mm/page_alloc.c:4427
RSP: 0018:ffff8801aca97c08 EFLAGS: 00010203
RAX: 0000000000000000 RBX: 1ffff10035952f82 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff81a5b8b5 RDI: ffffed0035952f70
RBP: ffff8801aca97c98 R08: ffff8801ae242200 R09: ffffed003b5e4fb0
R10: ffffed003b5e4fb0 R11: ffff8801daf27d87 R12: ffffea0006c37240
R13: 1ffff10035952f86 R14: ffff8801aca97c70 R15: ffffea0006c3725c
FS:  0000000002857940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004daa24 CR3: 00000001ad124000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 free_pages+0x50/0x90 mm/page_alloc.c:4441
 free_transition_pgtable+0x68/0xf0 arch/x86/kernel/machine_kexec_64.c:42
 machine_kexec_cleanup+0x9/0x10 arch/x86/kernel/machine_kexec_64.c:268
 kimage_free+0x1f2/0x270 kernel/kexec_core.c:639
 do_kexec_load+0x53a/0x790 kernel/kexec.c:170
 __do_sys_kexec_load kernel/kexec.c:243 [inline]
 __se_sys_kexec_load kernel/kexec.c:218 [inline]
 __x64_sys_kexec_load+0x1bf/0x230 kernel/kexec.c:218
 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455979
RSP: 002b:00007ffc994d7358 EFLAGS: 00000246 ORIG_RAX: 00000000000000f6
RAX: ffffffffffffffda RBX: 0000000002857914 RCX: 0000000000455979
RDX: 00000000200005c0 RSI: 0000000000000007 RDI: 0000000000000000
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005
R13: 0000000000000468 R14: 00000000006faa60 R15: 0000000000000005
Code: 68 5b 41 5c 41 5d 41 5e 41 5f 5d c3 8b b5 74 ff ff ff 4c 89 e7 e8 02 87 ff ff eb c6 48 c7 c6 00 68 d0 87 4c 89 e7 e8 21 7b 0d 00 <0f> 0b 4c 89 ef 89 85 70 ff ff ff e8 b1 7d 1d 00 8b 85 70 ff ff 
RIP: put_page_testzero include/linux/mm.h:492 [inline] RSP: ffff8801aca97c08
RIP: __free_pages+0x14f/0x180 mm/page_alloc.c:4427 RSP: ffff8801aca97c08
---[ end trace 7000647dc910ed83 ]---