flags: 0x2fffc0000000000() raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff raw: ffffea00073788e0 ffff8801dae2fdd8 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: 0 PID: 7654 Comm: syz-executor1 Not tainted 4.17.0-rc5+ #51 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:ffff8801b587fc08 EFLAGS: 00010203 RAX: 0000000000000000 RBX: 1ffff10036b0ff82 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff81a5b9e5 RDI: ffffed0036b0ff70 RBP: ffff8801b587fc98 R08: ffff8801b47c0040 R09: 0000000000000006 R10: ffff8801b47c0040 R11: 0000000000000000 R12: ffffea00071ccb00 R13: 1ffff10036b0ff86 R14: ffff8801b587fc70 R15: ffffea00071ccb1c FS: 00007f6e628bd700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004daac4 CR3: 00000001b824a000 CR4: 00000000001426f0 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: 0033:0x455a09 RSP: 002b:00007f6e628bcc68 EFLAGS: 00000246 ORIG_RAX: 00000000000000f6 RAX: ffffffffffffffda RBX: 00007f6e628bd6d4 RCX: 0000000000455a09 RDX: 00000000200005c0 RSI: 0000000000000007 RDI: 0000000000000000 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000013 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 80 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: ffff8801b587fc08 RIP: __free_pages+0x14f/0x180 mm/page_alloc.c:4427 RSP: ffff8801b587fc08 ---[ end trace 68dcc6dd6089b2ca ]---