BUG: Bad page map in process syz-executor.1  pte:07200720 pmd:10f17b067
addr:0000000001400000 vm_flags:08000071 anon_vma:0000000000000000 mapping:ffff88811d6b6b60 index:270
file:syzkaller-shm153258817 fault:ext4_filemap_fault mmap:ext4_file_mmap readpage:ext4_readpage
CPU: 1 PID: 8316 Comm: syz-executor.1 Not tainted 5.9.0-rc1-syzkaller #0
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+0xb3/0xec lib/dump_stack.c:118
 print_bad_pte.cold.117+0x93/0xbd mm/memory.c:547
 vm_normal_page+0x48/0xb0 mm/memory.c:610
 zap_pte_range mm/memory.c:1064 [inline]
 zap_pmd_range mm/memory.c:1195 [inline]
 zap_pud_range mm/memory.c:1224 [inline]
 zap_p4d_range mm/memory.c:1245 [inline]
 unmap_page_range+0x3ff/0xbd0 mm/memory.c:1266
 unmap_vmas+0xcd/0x130 mm/memory.c:1343
 exit_mmap+0xbc/0x1a0 mm/mmap.c:3183
 __mmput kernel/fork.c:1076 [inline]
 mmput+0x68/0x140 kernel/fork.c:1097
 exit_mm kernel/exit.c:483 [inline]
 do_exit+0x37a/0xcc0 kernel/exit.c:793
 do_group_exit+0x42/0xb0 kernel/exit.c:903
 get_signal+0x176/0xcc0 kernel/signal.c:2757
 arch_do_signal+0x2b/0x920 arch/x86/kernel/signal.c:811
 exit_to_user_mode_loop kernel/entry/common.c:135 [inline]
 exit_to_user_mode_prepare+0x181/0x1f0 kernel/entry/common.c:166
 syscall_exit_to_user_mode+0x59/0x2b0 kernel/entry/common.c:241
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d4d9
Code: Bad RIP value.
RSP: 002b:00007f4f2c85fcf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 000000000118cf48 RCX: 000000000045d4d9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000118cf48
RBP: 000000000118cf40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007ffc86076cff R14: 00007f4f2c8609c0 R15: 000000000118cf4c