BUG: Bad page map in process syz-executor.0 pte:7777777798152007 pmd:0017d067 addr:00000000f786f000 vm_flags:180400fb anon_vma:0000000000000000 mapping:ffff888219ba66e8 index:ac file:kcov fault:0x0 mmap:kcov_mmap readpage:0x0 CPU: 0 PID: 30172 Comm: syz-executor.0 Not tainted 5.9.0-rc3-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+0x198/0x1fd lib/dump_stack.c:118 print_bad_pte.cold+0x1e6/0x219 mm/memory.c:547 vm_normal_page+0x224/0x380 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+0xb91/0x2b20 mm/memory.c:1266 unmap_single_vma+0x198/0x300 mm/memory.c:1311 unmap_vmas+0x168/0x2e0 mm/memory.c:1343 exit_mmap+0x2b1/0x530 mm/mmap.c:3183 __mmput+0x122/0x470 kernel/fork.c:1076 mmput+0x53/0x60 kernel/fork.c:1097 exit_mm kernel/exit.c:483 [inline] do_exit+0xa8b/0x29f0 kernel/exit.c:793 do_group_exit+0x125/0x310 kernel/exit.c:903 get_signal+0x428/0x1f00 kernel/signal.c:2757 arch_do_signal+0x82/0x2520 arch/x86/kernel/signal.c:811 exit_to_user_mode_loop kernel/entry/common.c:136 [inline] exit_to_user_mode_prepare+0x1ae/0x200 kernel/entry/common.c:167 syscall_exit_to_user_mode+0x7e/0x2e0 kernel/entry/common.c:242 __do_fast_syscall_32+0x63/0x80 arch/x86/entry/common.c:127 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:149 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7fc7549 Code: Bad RIP value. RSP: 002b:00000000f55c112c EFLAGS: 00000292 ORIG_RAX: 00000000000000f0 RAX: fffffffffffffe00 RBX: 0000000008b9bfa8 RCX: 0000000000000080 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000008b9bfac RBP: 00000000f55c1228 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 BUG: Bad rss-counter state mm:000000006a596196 type:MM_FILEPAGES val:2