[Bug 294798] drm-latest: panic when starting KDE wayland : panic: pctrie_iter_insert_lookup: key 80 is already present
Date: Sun, 26 Apr 2026 03:44:37 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=294798
Bug ID: 294798
Summary: drm-latest: panic when starting KDE wayland : panic:
pctrie_iter_insert_lookup: key 80 is already present
Product: Base System
Version: Unspecified
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: bugs@FreeBSD.org
Reporter: henry.hu.sh@gmail.com
I recently updated to the latest snapshot kernel & base using pkgbase:
FreeBSD vita.local 15.1-PRERELEASE FreeBSD 15.1-PRERELEASE
stable/15-n283327-f9d4517b53bf GENERIC amd64
then installed nvidia-drm-latest-kmod-580 and drm-latest-kmod from ports. Then,
when I try to start KDE wayland, I get this panic:
panic: pctrie_iter_insert_lookup: key 80 is already present
(kgdb) #0 __curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:57
td = <optimized out>
#1 doadump (textdump=<optimized out>) at /usr/src/sys/kern/kern_shutdown.c:399
error = 0
coredump = <optimized out>
#2 0xffffffff80b7fe99 in kern_reboot (howto=260)
at /usr/src/sys/kern/kern_shutdown.c:519
once = 0
#3 0xffffffff80b803a7 in vpanic (
fmt=0xffffffff8127b02b "%s: key %jx is already present",
ap=ap@entry=0xfffffe021bb67a10) at /usr/src/sys/kern/kern_shutdown.c:974
buf = "pctrie_iter_insert_lookup: key 80 is already present", '\000'
<repeats 203 times>
__pc = 0x0
__pc = 0x0
__pc = 0x0
other_cpus = {__bits = {267911167, 0 <repeats 15 times>}}
td = 0xfffff80a01697000
bootopt = <unavailable>
newpanic = <optimized out>
#4 0xffffffff80b801d3 in panic (fmt=<unavailable>)
at /usr/src/sys/kern/kern_shutdown.c:887
ap = {{gp_offset = 24, fp_offset = 48,
overflow_arg_area = 0xfffffe021bb67a40,
reg_save_area = 0xfffffe021bb679e0}}
#5 0xffffffff80bd4d38 in pctrie_iter_insert_lookup (
it=it@entry=0xffffffff80f370f2 <vm_page_iter_insert+50>,
val=val@entry=0xfffffe003881bc20) at /usr/src/sys/kern/subr_pctrie.c:458
found = <optimized out>
res = 0x0
#6 0xffffffff80f370f2 in VM_RADIX_PCTRIE_ITER_INSERT (it=0xfffffe021bb67c18,
ptr=0xfffffe003881bc08) at /usr/src/sys/vm/vm_radix.h:59
val = 0xfffffe003881bc20
parentp = <optimized out>
#7 vm_radix_iter_insert (pages=0xfffffe021bb67c18, page=0xfffffe003881bc08)
at /usr/src/sys/vm/vm_radix.h:79
No locals.
#8 vm_page_insert_lookup (m=m@entry=0xfffffe003881bc08,
object=0xfffff80a016ef3c0, object@entry=0xfffffe021bb67c18,
pindex=<unavailable>, iter=true, pages=<unavailable>,
pages@entry=0xffffffff80f370f2 <vm_page_iter_insert+50>)
at /usr/src/sys/vm/vm_page.c:1515
error = <optimized out>
#9 vm_page_iter_insert (m=m@entry=0xfffffe003881bc08,
object=object@entry=0xfffff80a016ef3c0, pindex=<unavailable>,
pages=<unavailable>, pages@entry=0xfffffe021bb67c18)
at /usr/src/sys/vm/vm_page.c:1556
No locals.
#10 0xffffffff80f37b31 in vm_page_alloc_domain_iter (
object=object@entry=0xfffff80a016ef3c0, pindex=pindex@entry=128,
domain=<optimized out>, req=32768, pages=pages@entry=0xfffffe021bb67c18)
at /usr/src/sys/vm/vm_page.c:2200
flags = <optimized out>
m = 0xfffffe003881bc08
vmd = <optimized out>
#11 0xffffffff80f37814 in vm_page_alloc_iter (object=0xfffff80a016ef3c0,
pindex=128, req=32768, pages=pages@entry=0xfffffe021bb67c18)
at /usr/src/sys/vm/vm_page.c:2030
di = {di_domain = 0xffffffff81800120 <domainset_firsttouch>,
di_iter = 0xfffff80a01697070, di_valid_mask = {__bits = {1}},
di_remain_mask = {__bits = {0}}, di_min_mask = {__bits = {0}},
di_offset = 1, di_flags = 0, di_policy = 2, di_minskip = true}
domain = 0
m = <optimized out>
#12 0xffffffff80f1edcd in vm_fault_allocate (fs=fs@entry=0xfffffe021bb67c80,
pages=pages@entry=0xfffffe021bb67c18) at /usr/src/sys/vm/vm_fault.c:1363
res = <optimized out>
dset = 0xffffffff81800120 <domainset_firsttouch>
#13 0xffffffff80f1d633 in vm_fault_object (fs=0xfffffe021bb67c80,
behindp=0xfffffe021bb67c64, aheadp=0xfffffe021bb67c78)
at /usr/src/sys/vm/vm_fault.c:1633
pages = {ptree = 0xfffff80a016ef408, node = 0xfffff809dc289e40,
index = 128, limit = 0}
res = <optimized out>
dead = <optimized out>
_v = <optimized out>
_v = <optimized out>
_v = <optimized out>
_tid = <optimized out>
_v = <optimized out>
#14 vm_fault (map=<optimized out>, vaddr=38107873280, fault_type=2 '\002',
fault_flags=<optimized out>, m_hold=m_hold@entry=0x0)
at /usr/src/sys/vm/vm_fault.c:1791
pages = {ptree = 0xffffffff81bcdb40 <umtxq_chains+28320>, node = 0x0,
index = 18446744071591222080, limit = 0}
ahead = 2
behind = 13
fs = {vaddr = 38107873280, m_hold = 0x0, fault_type = 2 '\002',
prot = <optimized out>, fault_flags = 0, wired = 0,
oom_start_time = {tv_sec = -8755979584768, tv_usec = 2147585564},
oom_started = false, nera = -1, can_read_lock = true, m_cow = 0x0,
object = 0xfffff80a016ef3c0, pindex = 128, m = 0x0,
m_needs_zeroing = true, first_object = 0xfffff80a016ef3c0,
first_pindex = 128, first_m = 0x0, map = 0xfffff80028071248,
entry = 0xfffff80a33afb2a0, map_generation = 3334,
lookup_still_valid = true, vp = 0x0}
faultcount = <optimized out>
hardfault = <optimized out>
rv = <optimized out>
res = <optimized out>
res_next = <optimized out>
#15 0xffffffff80f1d18d in vm_fault_trap (map=<optimized out>,
vaddr=<optimized out>, fault_type=<optimized out>,
fault_flags=fault_flags@entry=0, signo=0xfffffe021bb67f00,
ucode=0xfffffe021bb67f04) at /usr/src/sys/vm/vm_fault.c:753
result = <optimized out>
#16 0xffffffff81091e4c in trap_pfault (frame=frame@entry=0xfffffe021bb67f40,
usermode=true, signo=<unavailable>, signo@entry=0xfffffe021bb67f00,
ucode=<unavailable>, ucode@entry=0xfffffe021bb67f04)
at /usr/src/sys/amd64/amd64/trap.c:916
__pc = 0x0
__pc = 0x0
__pc = 0x0
td = 0xfffff80a01697000
p = <optimized out>
eva = <unavailable>
map = <unavailable>
ftype = <unavailable>
rv = <optimized out>
#17 0xffffffff81091461 in trap (frame=<optimized out>)
at /usr/src/sys/amd64/amd64/trap.c:472
__pc = 0x0
__pc = 0x0
__pc = 0x0
ksi = {ksi_link = {tqe_next = 0x0, tqe_prev = 0x0}, ksi_info = {
si_signo = 0, si_errno = 0, si_code = 0, si_pid = 0, si_uid = 0,
si_status = 0, si_addr = 0x0, si_value = {sival_int = 0,
sival_ptr = 0x0, sigval_int = 0, sigval_ptr = 0x0}, _reason = {
_fault = {_trapno = -1615724928}, _timer = {
_timerid = -1615724928, _overrun = 8}, _mesgq = {
_mqd = -1615724928}, _poll = {_band = 37038980736},
_capsicum = {_syscall = -1615724928}, __spare__ = {
__spare1__ = 37038980736, __spare2__ = {1, 0, 4, 0, 64, 0,
-546890496}}}}, ksi_flags = -1615725104,
ksi_sigq = 0xffffffff81069c73 <Xinvlop+179>}
signo = 519
ucode = 0
td = 0xfffff80a01697000
p = 0xfffffe01ff304ab0
dr6 = 0
type = 12
addr = 36591146712
pf = <optimized out>
i = <optimized out>
Now I've switched to nvidia-drm-66-kmod-580 and drm-66-kmod, and it works fine.
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