login: panic: m_zero: M_READONLY
Stopped at db_enter+0xa: popq %rbp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
db_enter() at db_enter+0xa sys/arch/amd64/amd64/db_interface.c:399
panic() at panic+0x147 sys/kern/subr_prf.c:208
m_free(ffffff006d632b00) at m_free+0x17a sys/kern/uipc_mbuf.c:1267
m_freem(ffffffff) at m_freem+0x2d sys/kern/uipc_mbuf.c:525
vio_txeof(ffff800000173290) at vio_txeof+0x104 sys/dev/pv/if_vio.c:1140
vio_tx_intr(ffff800000173110) at vio_tx_intr+0x25 sys/dev/pv/if_vio.c:1116
intr_handler(0,ffff80000064d280) at intr_handler+0x6b sys/arch/amd64/amd64/intr.c:529
Xintr_ioapic_edge20_untramp(0,0,1388,0,ffff800000022a00,ffff800000022a00) at Xintr_ioapic_edge20_untramp+0x19f
acpicpu_idle() at acpicpu_idle+0x251 sys/dev/acpi/acpicpu.c:1187
sched_idle(0) at sched_idle+0x374 sys/kern/kern_sched.c:177
end trace frame: 0x0, count: 5
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> show panic
m_zero: M_READONLY
ddb{0}> trace
db_enter() at db_enter+0xa sys/arch/amd64/amd64/db_interface.c:399
panic() at panic+0x147 sys/kern/subr_prf.c:208
m_free(ffffff006d632b00) at m_free+0x17a sys/kern/uipc_mbuf.c:1267
m_freem(ffffffff) at m_freem+0x2d sys/kern/uipc_mbuf.c:525
vio_txeof(ffff800000173290) at vio_txeof+0x104 sys/dev/pv/if_vio.c:1140
vio_tx_intr(ffff800000173110) at vio_tx_intr+0x25 sys/dev/pv/if_vio.c:1116
intr_handler(0,ffff80000064d280) at intr_handler+0x6b sys/arch/amd64/amd64/intr.c:529
Xintr_ioapic_edge20_untramp(0,0,1388,0,ffff800000022a00,ffff800000022a00) at Xintr_ioapic_edge20_untramp+0x19f
acpicpu_idle() at acpicpu_idle+0x251 sys/dev/acpi/acpicpu.c:1187
sched_idle(0) at sched_idle+0x374 sys/kern/kern_sched.c:177
end trace frame: 0x0, count: -10
ddb{0}> show registers
rdi 0xffffffff81e323f0 kprintf_mutex
rsi 0x5
rbp 0xffff8000210391e0
rbx 0xffff800021039280
rdx 0x3fd
rcx 0
rax 0x1
r8 0xffff8000210391b0
r9 0
r10 0
r11 0xffffff006ee56c70
r12 0x3000000008
r13 0xffff8000210391f0
r14 0x100
r15 0xffffffff81bed177 apollo_pio_rec+0x6e0d
rip 0xffffffff811b599a db_enter+0xa
cs 0x8
rflags 0x202
rsp 0xffff8000210391e0
ss 0x10
db_enter+0xa: popq %rbp
ddb{0}> show proc
PROC (idle0) pid=363638 stat=onproc
flags process=14000<NOZOMBIE,SYSTEM> proc=40000200<SYSTEM,CPUPEG>
pri=0, usrpri=60, nice=20
forw=0x9647fc485d43f271, list=0xffff8000210319c8,0xffff8000210312d0
process=0xffff800021032fc8 user=0xffff800021034000, vmspace=0xffffffff81ee0e58
estcpu=10, cpticks=42, pctcpu=15.84
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
35409 225926 1297 0 3 0x82 nanosleep syz-executor3385
1297 216120 38812 0 3 0x10008a pause ksh
38812 113021 60312 0 3 0x92 select sshd
80119 439021 1 0 3 0x100083 ttyin getty
60312 78105 1 0 3 0x80 select sshd
93729 240715 80566 73 3 0x100090 kqread syslogd
80566 355707 1 0 3 0x100082 netio syslogd
56552 309071 1 77 3 0x100090 poll dhclient
21394 165464 1 0 3 0x80 poll dhclient
54833 506270 0 0 3 0x14200 pgzero zerothread
17091 299971 0 0 3 0x14200 aiodoned aiodoned
48397 461218 0 0 3 0x14200 syncer update
19301 82229 0 0 3 0x14200 cleaner cleaner
10792 188620 0 0 3 0x14200 reaper reaper
80033 162513 0 0 3 0x14200 pgdaemon pagedaemon
75501 468094 0 0 3 0x14200 bored crynlk
35533 423539 0 0 3 0x14200 bored crypto
75201 268160 0 0 3 0x40014200 acpi0 acpi0
67561 284554 0 0 7 0x40014200 idle1
47483 80162 0 0 3 0x14200 bored softnet
82786 148819 0 0 3 0x14200 bored systqmp
41914 105710 0 0 3 0x14200 bored systq
26025 275892 0 0 3 0x40014200 bored softclock
*83616 363638 0 0 7 0x40014200 idle0
1 202268 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}>