syzbot


panic: pmap_remove_ptes: unmanaged page marked PG_PVLIST: va ADDR, opte 0x3efff (2)

Status: upstream: reported on 2025/11/24 08:10
Reported-by: syzbot+5743a7a1158aaf9df698@syzkaller.appspotmail.com
First crash: 9d16h, last: 9d16h
Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd panic: pmap_remove_ptes: unmanaged page marked PG_PVLIST: va ADDR, opte 0x3efff 2 11 466d 597d 0/3 auto-obsoleted due to no activity on 2024/11/22 23:18

Sample crash report:
panic: pmap_remove_ptes: unmanaged page marked PG_PVLIST: va 0x1b2d060000, opte 0x3efff
Starting stack trace...
panic(ffffffff8343936e) at panic+0x1d0 sys/kern/subr_prf.c:229
pmap_remove_pte(fffffd8073df5100,fffffd8008912218,7f800d968100,1b2d020000,1b2d200000,0) at pmap_remove_pte
pmap_do_remove(fffffd8073df5100,1b2d020000,1b2d420000,0) at pmap_do_remove+0x589 sys/arch/amd64/amd64/pmap.c:1920
uvm_unmap_kill_entry_withlock(fffffd806fa627a8,fffffd80710e5df8,0) at uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1863
uvm_map_teardown(fffffd806fa627a8) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline]
uvm_map_teardown(fffffd806fa627a8) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486
exit1(ffff80003c427780,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260
sys_exit(ffff80003c427780,ffff80002a390f20,ffff80002a390e70) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a390f20) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a390f20) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x715a036e3380, count: 248
End of stack trace.

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/11/24 08:09 openbsd 879ea5f6fdb7 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore panic: pmap_remove_ptes: unmanaged page marked PG_PVLIST: va ADDR, opte 0x3efff
* Struck through repros no longer work on HEAD.