syzbot


panic: pmap_remove_ptes: managed page without PG_PVLIST: va ADDR, opte ADDR (3)

Status: upstream: reported on 2025/11/14 16:04
Reported-by: syzbot+793fee8c3c8257999cae@syzkaller.appspotmail.com
First crash: 10d, last: 10d
Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd panic: pmap_remove_ptes: managed page without PG_PVLIST: va ADDR, opte ADDR (2) 2 1 475d 475d 0/3 auto-obsoleted due to no activity on 2024/11/03 22:53
openbsd panic: pmap_remove_ptes: managed page without PG_PVLIST: va ADDR, opte ADDR 2 1 1424d 1424d 0/3 auto-closed as invalid on 2022/03/30 22:21

Sample crash report:
panic: pmap_remove_ptes: managed page without PG_PVLIST: va 0x1b2d44a000, opte 0x6bbb4001
Starting stack trace...
panic(ffffffff833c8e48) at panic+0x1d0 sys/kern/subr_prf.c:229
pmap_remove_pte(fffffd800b062200,fffffd8008899640,7f800d96a100,1b2d420000,1b2d600000,0) at pmap_remove_pte
pmap_do_remove(fffffd800b062200,1b2d420000,1b2d820000,0) at pmap_do_remove+0x589 sys/arch/amd64/amd64/pmap.c:1920
uvm_unmap_kill_entry_withlock(fffffd806ca8f018,fffffd806cb48de8,0) at uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1863
uvm_map_teardown(fffffd806ca8f018) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline]
uvm_map_teardown(fffffd806ca8f018) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486
exit1(ffff8000fffeba10,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260
sys_exit(ffff8000fffeba10,ffff80003a405ee0,ffff80003a405e30) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80003a405ee0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003a405ee0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7265fc72fb90, 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
2025/11/14 16:03 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore panic: pmap_remove_ptes: managed page without PG_PVLIST: va ADDR, opte ADDR
* Struck through repros no longer work on HEAD.