Dear bugs@,
with the following snapshot I had two panics on my x270 recently.
sysctl kern.version
kern.version=OpenBSD 7.3-current (GENERIC.MP) #1256: Thu Jun 22 10:53:02 MDT
2023
dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP
Below are transcribed pictures of my laptop screen.
panic: rw_enter: vmmaplk locking against myself
Stopped at db_enter+0x14: popq %rbp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*258766 67401 1000 0x2100002 0x4000000 0K firefox
465097 28019 0 0x14000 0x200 1 drmwq
db_enter () at db_enter+0x14
panic(ffffffff820e78b0) at panic+0xc3
rw_enter(fffffd87449a0f60,2) at rw_enter+0x26f
uvmfault_lookup(ffff800044cc3a30,0) at uvmfault_lookup+0x8a
uvm_fault_check(ffff800044cc3a30, ffff800044cc3a68,ffff800044cc3a90) at
uvm_fault_check+0x36
uvm_fault(fffffd87449a0e78,ab6ed8ea000,0,1) at uvm_fault+0xfb
kpageflttrap(ffff800044cc3bb0, ab6ed8ea088) at kpageflttrap+0x171
kerntrap(ffff800044cc3bb0) at kerntrap+0x95
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
_rb_min(ffffffff823f89a8,ffff800000278060) at _rb_min+0x23
ieee80211_clean_inactive_nodes(ffff800000277048,a) at
ieee80211_clean_inactive_nodes+0x4c
ieee80211_end_scan(ffff800000277048) at ieee80211_end_scan+0xc8
iwm_rx_pkt(ffff800000277000,ffff8000002f6210,ffff800044cc3e10) at
iwm_rx_pkt+0x871
iwm_notif_intr(ffff80000027700) at iwm_notif_intr+0xd3
ent trace frame: 0xffff800044cc3eb0, count: 0
https://www.openbsd.org/ddb.html describes the minimum info required in bugr
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{0}> show reg
rdi 0
rsi 0x14
rbp 0xffff800044cc3720
rbx 0
rdx 0x20
rcx 0x20
rax 0x30
r8 0
r9 0
r10 0xfff800044cc3528
r11 0xbe1d4bcaa3793568
r12 0xffffffff82481990 cpu_info_full_primary+0x2990
r13 0xffff800044bbee04
r14 0
r15 0xffffffff820e78b0 cmd680_setup_channel.udma_tbl+0x67e3
rip 0xffffffff81d55bc4 db_enter+0x14
cs 0x8
rflags 0x282
rsp 0xffff800044cc3720
ss 0x10
db_enter+0x14: popq %rbp
the previous panic looked similar except that there was a panic
during that panic:
dbb{0}>bt
db_enter() at db_enter+0x14
panic(ffffffff820a0212) at panic+0xc3
__assert(ffffffff8211a18a,ffffffff820eab20,3f,ffffffff8215092f) at __assert+0x29
_kernel_lock() at _kernel_lock+0x10f
selwakeup(ffff8000019cc710) at selwakeup+0x15
ptsstart(ffff8000019a6c00) at ptsstart+0x7d
tputchar(73,ffff8000019a6c00) at tputchar+0x88
kputchar(73,5,0) at kputchar+0x8d
printf(ffffffff8214c975) at printf+0x74
splassert_fail(0,7,ffffffff821069d9) at splassert_fail+0x46
assertwaitok() at assertwaitok+0x40
mi_switch() at mi_switch+0x44
sleep_finish(ffff800022f4ec50,1) at sleep_finish+0x102
msleep(ffff800003cb5410,ffff800003cb5418,0,ffffffff820b8504,3e8) at msleep+0xcb
drm_atomic_helper_wait_for_flip_done(ffff800000257078,ffff8000039ea000) at
drm_atomic_helper_wait_for_flip_done+0xcf
intel_atomic_commit_tail(ffff8000039ea000) at intel_atomic_commit_tail+0xc26
intel_atomic_commit(ffff800000257078,ffff8000039ea000,0) at
intel_atomic_commit+0x33d
drm_atomic_commit(ffff8000039ea000) at drm_atomic_commit+0xa7
drm_client_modeset_commit_atomic(ffff8000012dee00,1,0) at
drm_client_modeset_commit_atomic+0x178
drm_client_modeset_commit_locket(ffff8000012dee00) at
drm_client_modeset_commitlocked+0x59
drm_fb_helper_restore_fbdev_mode_unlocked(ffff8000012dee00) at
drm_fb_helper_restore_fbdev_mode_unlocked+0x48
intel_fbdev_restore_mode(ffff8000000257078) at intel_fbdev_restore_mode+0x37
db_ktrap(4,0,ffff800022f4f130) at db_ktrap+0x30
kerntrap(ffff800022f4130) at kerntrap+0xa8
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
_rb_min(ffffffff8220f7b8,ffff800000278060) at rb_min+0x23
ieee80211_clean_inactive_nodes(ffff800000277048,a) at
ieee80211_clean_inactive_nodes+0x4c
ieee80211_end_scan(ffff800000277048) at ieee80211_end_scan+0xc8
iwm_rx_pkt(ffff800000277000,ffff8000002f6500,ffff800022f4f390) at
iwm_rx_pkt+0x871
iwm_notif_intr(ffff800000277000) at iwm_notif_intr+0xd3
intr_handler(ffff800022f4f490,ffff800000234e80) at intr_handler+0x72
Xinter_ioapic_edge23_untramp(() at Xintr_ioapic_edge23_untramp+0x18f
acpicpu_idle() at acpicpu_idle+0x203
sched_idle(ffffffff82464ff0) at sched_idle+0x280
end trace frame: 0x0, count: -36
ddb{0}> show panic
*cpu0: kernel diagnostic assertion "__mp_lock_held(&sched_lock, curcpu()) == 0"
failed: file "/usr/src/sys/kern/kerndlock.c" line 63
ddb{0}> show reg
rdi 0
rsi 0x14
rbp 0xffff8000022f4e790
rbx 0x1
rdx 0xffff800025013000
rcx 0x20
rax 0x86
r8 0x70000 acpi_pdirpa+0x5be63
r9 0
r10 0x1e00 __ALIGN_SIZE+0xe00
r11 0xb540fa7f6b812bc3
r12 0xffffffff82465990 cpu_info_full_primary+0x2990
r13 0
r14 0
r15 0xffffffff820a0212 cmd0646_9_tim_udma+0x33643
rip 0xffffffff818f8de4 db_enter+0x14
rflags 0x8
rsp 0xffff800022f4e790
ss 0x10
db_enter+0x14: popq %rbp
mbuhl
