BUG: Bad page map in process syz.4.102  pte:ffff8881e21c31c0 pmd:1e06eb067
addr:00007fe5fc439000 vm_flags:100400fb anon_vma:0000000000000000 mapping:ffff8881f1147930 index:156
file:kcov fault:0x0 mmap:kcov_mmap readpage:0x0
CPU: 0 PID: 727 Comm: syz.4.102 Not tainted 5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 __dump_stack+0x1e/0x20 lib/dump_stack.c:77
 dump_stack+0x15b/0x1b8 lib/dump_stack.c:118
 print_bad_pte+0x584/0x5a0 mm/memory.c:560
 vm_normal_page+0x139/0x1f0 mm/memory.c:649
 zap_pte_range mm/memory.c:1078 [inline]
 zap_pmd_range mm/memory.c:1222 [inline]
 zap_pud_range mm/memory.c:1251 [inline]
 zap_p4d_range mm/memory.c:1272 [inline]
 unmap_page_range+0xaf6/0x1b20 mm/memory.c:1293
 unmap_single_vma mm/memory.c:1338 [inline]
 unmap_vmas+0x245/0x340 mm/memory.c:1370
 exit_mmap+0x2bb/0x520 mm/mmap.c:3191
 __mmput+0x92/0x2e0 kernel/fork.c:1101
 mmput+0x47/0x60 kernel/fork.c:1122
 exit_mm kernel/exit.c:538 [inline]
 do_exit+0x99f/0x2660 kernel/exit.c:848
 do_group_exit+0x13e/0x300 kernel/exit.c:984
 get_signal+0xdee/0x13d0 kernel/signal.c:2738
 do_signal+0xad/0xda0 arch/x86/kernel/signal.c:809
 exit_to_usermode_loop+0xc4/0x1b0 arch/x86/entry/common.c:159
 prepare_exit_to_usermode+0x18e/0x1f0 arch/x86/entry/common.c:194
 syscall_return_slowpath arch/x86/entry/common.c:274 [inline]
 do_syscall_64+0x13e/0x170 arch/x86/entry/common.c:300
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7fe5fdc78969
Code: Bad RIP value.
RSP: 002b:00007fe5fc29f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffa1 RBX: 00007fe5fdea0160 RCX: 00007fe5fdc78969
RDX: 0000200000000080 RSI: 00000000000089f2 RDI: 0000000000000004
RBP: 00007fe5fdcfaab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fe5fdea0160 R15: 00007fffa9d6fc98