syzbot


panic: pmap_do_remove: unmanaged PTP detected

Status: upstream: reported on 2025/11/28 15:46
Reported-by: syzbot+107c0e5944d396e11242@syzkaller.appspotmail.com
First crash: 66d, last: 26d

Sample crash report:
panic: pmap_do_remove: unmanaged PTP detected
Starting stack trace...
panic(ffffffff8332c049) at panic+0x1d0 sys/kern/subr_prf.c:229
pmap_do_remove(fffffd806c89a400,5fec9154000,5fec9553000,0) at pmap_do_remove+0xc1e sys/arch/amd64/amd64/pmap.c:1846
uvm_unmap_kill_entry_withlock(fffffd806f645990,fffffd80718a44b8,0) at uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1863
uvm_map_teardown(fffffd806f645990) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline]
uvm_map_teardown(fffffd806f645990) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2491
exit1(ffff8000ffffd9f8,b,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260
sys_exit(ffff8000ffffd9f8,ffff80002a332f40,ffff80002a332e90) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a332f40) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a332f40) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7ececcdca630, count: 249
End of stack trace.

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/01/07 08:07 openbsd c7117ed52e15 15f6fd08 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore panic: pmap_do_remove: unmanaged PTP detected
2025/11/28 15:45 openbsd 88dc91f4cc14 d1b870e1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: pmap_do_remove: unmanaged PTP detected
* Struck through repros no longer work on HEAD.