syzbot


assert "!pmap_is_ept(pmap)" failed in pmap.c

Status: upstream: reported on 2025/11/27 19:25
Reported-by: syzbot+74b64e0e8600f66e0644@syzkaller.appspotmail.com
First crash: 85d, last: 35d

Sample crash report:
panic: kernel diagnostic assertion "!pmap_is_ept(pmap)" failed: file "/syzkaller/managers/multicore/kernel/sys/arch/amd64/amd64/pmap.c", line 424
Starting stack trace...
panic(ffffffff833b04b6) at panic+0x1d0 sys/kern/subr_prf.c:229
__assert(ffffffff833ee1f5,ffffffff833dea2d,1a8,ffffffff833ad726) at __assert+0x29 sys/kern/subr_prf.c:-1
pmap_page_remove(fffffd80088ce100) at pmap_page_remove+0x7ad pmap_map_ptes sys/arch/amd64/amd64/pmap.c:438 [inline]
pmap_page_remove(fffffd80088ce100) at pmap_page_remove+0x7ad sys/arch/amd64/amd64/pmap.c:1974
uvm_anfree(fffffd806ce123e8) at uvm_anfree+0xd8 sys/uvm/uvm_anon.c:111
amap_wipeout(fffffd8070301d68) at amap_wipeout+0x246 sys/uvm/uvm_amap.c:-1
uvm_unmap_detach(ffff80002a346b00,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
uvm_map_teardown(fffffd800b0631e8) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2530
exit1(ffff8000ffffc2a0,43,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260
sys_exit(ffff8000ffffc2a0,ffff80002a346cd0,ffff80002a346c20) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a346cd0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a346cd0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7137d310d980, count: 246
End of stack trace.

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/01/17 06:46 openbsd 5569d0f08b09 56f88057 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "!pmap_is_ept(pmap)" failed in pmap.c
2025/11/27 19:25 openbsd 7de01a79e4ba e8331348 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "!pmap_is_ept(pmap)" failed in pmap.c
* Struck through repros no longer work on HEAD.