[Bug 292314] Panic on shutdown -r for current armv7 on raspberry pi 2b
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Date: Sat, 10 Jan 2026 00:18:10 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=292314
Bug ID: 292314
Summary: Panic on shutdown -r for current armv7 on raspberry pi
2b
Product: Base System
Version: CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: arm
Assignee: freebsd-arm@FreeBSD.org
Reporter: fbsd@www.zefox.net
A pair of Raspberry Pi2b v1.1 (so, armv7) hosts crash on shutdown -r, ending in
the debugger. The crash messages differ, the only obvious difference is the
hard disk type, usb3-sata vs usb2-pata.
The first machine is running:
bob@pelorus:~ % uname -a
FreeBSD pelorus.zefox.org 16.0-CURRENT FreeBSD 16.0-CURRENT #13
main-n282791-2eec2bcca297: Sat Jan 3 14:10:46 PST 2026
bob@pelorus.zefox.org:/usr/obj/usr/src/arm.armv7/sys/GENERIC arm
bob@pelorus:~ % uname -KU
1600007 1600007
bob@pelorus:~ %
Root is on a 1 TB mechanical hard disk via a usb3-sata bridge, boot is via
bootcode.bin on microSD.
root@pelorus:~ # shutdown -r now
Shutdown NOW!
shutdown: [pid 10103]
root@pelorus:~ #
*** FINAL System shutdown message from root@pelorus.zefox.org ***
Stopping cron.
Waiting for PIDS: 2101.
Stopping sendmail.
Waiting for PIDS: 2106.
Stopping sendmail_msp_queue.
Waiting for PIDS: 2109.
Stopping sshd.
Waiting for PIDS: 2126.
Stopping powerd.
Waiting for PIDS: 2054.
Stopping devd.
Waiting for PIDS: 1630.
Writing entropy file: .
Writing early boot entropy file: .
.
Terminated
Jan 9 14:47:32 pelorus syslogd: exiting on signal 15
Waiting (max 60 seconds) for system process `vnlru' to stop... done
Waiting (max 60 seconds) for system process `syncer' to stop...
Syncing disks, vnodes remaining... 0 0 0 done
All buffers synced.
Uptime: 21h49m26s
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
ue0: link state changed to DOWN
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smscphy0: detached
Kernel page fault with the following non-sleepable locks held:
exclusive sleep mutex smsc0 (smsc0) r = 0 (0xd6a92570) locked @
/usr/src/sys/dev/usb/net/if_smsc.c:665
stack backtrace:
#0 0xc0382714 at witness_debugger+0x78
#1 0xc03839c0 at witness_warn+0x428
#2 0xc064dd18 at abort_handler+0x1d4
#3 0xc062c32c at exception_exit+0
#4 0xc00d587c at smscphy_status+0x80
#5 0xc00d57e4 at smscphy_service+0x21c
#6 0xc00ce240 at mii_pollstat+0x60
#7 0xc01b57d8 at smsc_ifmedia_sts+0x44
#8 0xc04524d8 at ifmedia_ioctl+0x198
#9 0xc0525ea8 at dump_iface+0x11c
#10 0xc0525c94 at rtnl_handle_iflink+0x9c
#11 0xc0449f20 at do_link_state_change+0x1e4
#12 0xc03744d4 at taskqueue_run_locked+0x1b4
#13 0xc03742e4 at taskqueue_run+0x50
#14 0xc02c15a0 at ithread_loop+0x264
#15 0xc02bd424 at fork_exit+0xa0
#16 0xc062c2c0 at swi_exit+0
Fatal kernel mode data abort: 'Translation Fault (L1)' on read
trapframe: 0xd3ab0b28
FSR=00000005, FAR=00000000, spsr=60000013
r0 =0000003d, r1 =bdfa140f, r2 =bdfa140f, r3 =00000000
r4 =d7499000, r5 =00000000, r6 =00000000, r7 =00000001
r8 =d749f0c0, r9 =c091e518, r10=00000000, r11=d3ab0bd8
r12=d3ab0adc, ssp=d3ab0bb8, slr=c01b3a80, pc =c00d587c
timeout stopping cpus
panic: Fatal abort
cpuid = 0
time = 1767998859
KDB: stack backtrace:
db_trace_self() at db_trace_self
pc = 0xc0629b70 lr = 0xc0077388 (db_trace_self_wrapper+0x30)
sp = 0xd3ab0900 fp = 0xd3ab0a18
db_trace_self_wrapper() at db_trace_self_wrapper+0x30
pc = 0xc0077388 lr = 0xc0309270 (vpanic+0x140)
sp = 0xd3ab0a20 fp = 0xd3ab0a40
r4 = 0x00000100 r5 = 0x00000000
r6 = 0xc0721f4b r7 = 0xc0b7a8e4
vpanic() at vpanic+0x140
pc = 0xc0309270 lr = 0xc0309130 (vpanic)
sp = 0xd3ab0a48 fp = 0xd3ab0a4c
r4 = 0xd3ab0b28 r5 = 0x00000013
r6 = 0x00000000 r7 = 0x00000005
r8 = 0x00000005 r9 = 0x00000013
r10 = 0x00000000
vpanic() at vpanic
pc = 0xc0309130 lr = 0xc064e2fc (abort_align)
sp = 0xd3ab0a54 fp = 0xd3ab0a80
r4 = 0x00000005 r5 = 0x00000005
r6 = 0x00000013 r7 = 0x00000000
r8 = 0xd3ab0a4c r9 = 0xc0309130
r10 = 0xd3ab0a54
abort_align() at abort_align
pc = 0xc064e2fc lr = 0xc064de44 (abort_handler+0x300)
sp = 0xd3ab0a88 fp = 0xd3ab0b20
r4 = 0xc4f0dc00 r10 = 0x00000000
abort_handler() at abort_handler+0x300
pc = 0xc064de44 lr = 0xc062c32c (exception_exit)
sp = 0xd3ab0b28 fp = 0xd3ab0bd8
r4 = 0xd7499000 r5 = 0x00000000
r6 = 0x00000000 r7 = 0x00000001
r8 = 0xd749f0c0 r9 = 0xc091e518
r10 = 0x00000000
exception_exit() at exception_exit
pc = 0xc062c32c lr = 0xc01b3a80 (smsc_miibus_readreg+0x74)
sp = 0xd3ab0bb8 fp = 0xd3ab0bd8
r0 = 0x0000003d r1 = 0xbdfa140f
r2 = 0xbdfa140f r3 = 0x00000000
r4 = 0xd7499000 r5 = 0x00000000
r6 = 0x00000000 r7 = 0x00000001
r8 = 0xd749f0c0 r9 = 0xc091e518
r10 = 0x00000000 r12 = 0xd3ab0adc
smscphy_status() at smscphy_status+0x80
pc = 0xc00d587c lr = 0xc00d57e4 (smscphy_service+0x21c)
sp = 0xd3ab0be0 fp = 0xd3ab0c00
r4 = 0x00000003 r5 = 0xd7499000
r6 = 0xd74a0fa0 r7 = 0xc0731d8a
r8 = 0x00000000 r9 = 0xc097a888
r10 = 0x00000000
smscphy_service() at smscphy_service+0x21c
pc = 0xc00d57e4 lr = 0xc00ce240 (mii_pollstat+0x60)
sp = 0xd3ab0c08 fp = 0xd3ab0c18
r4 = 0xd749f0c0 r5 = 0xd7499000
r6 = 0xd74a0fa0 r7 = 0xc0731d8a
r8 = 0x00000000 r9 = 0xc097a888
r10 = 0x00000000
mii_pollstat() at mii_pollstat+0x60
pc = 0xc00ce240 lr = 0xc01b57d8 (smsc_ifmedia_sts+0x44)
sp = 0xd3ab0c20 fp = 0xd3ab0c30
r4 = 0xd3ab0c78 r5 = 0xd6a92580
r6 = 0xd749f0c0 r10 = 0x00000000
smsc_ifmedia_sts() at smsc_ifmedia_sts+0x44
pc = 0xc01b57d8 lr = 0xc04524d8 (ifmedia_ioctl+0x198)
sp = 0xd3ab0c38 fp = 0xd3ab0c48
r4 = 0xd3ab0c78 r5 = 0x00000000
r6 = 0xd749f0c0 r7 = 0x00000020
ifmedia_ioctl() at ifmedia_ioctl+0x198
pc = 0xc04524d8 lr = 0xc0525ea8 (dump_iface+0x11c)
sp = 0xd3ab0c50 fp = 0xd3ab0cc0
r4 = 0xd3ab0cd4 r5 = 0xd7495c00
r6 = 0xd3ab0c78 r7 = 0xdaf91024
dump_iface() at dump_iface+0x11c
pc = 0xc0525ea8 lr = 0xc0525c94 (rtnl_handle_iflink+0x9c)
sp = 0xd3ab0cc8 fp = 0xd3ab0d18
r4 = 0xd7495c00 r5 = 0xd3ab0cd4
r6 = 0x00000000 r7 = 0xd3cae800
r8 = 0x00000001 r9 = 0x00000000
r10 = 0xd6cd19e0
rtnl_handle_iflink() at rtnl_handle_iflink+0x9c
pc = 0xc0525c94 lr = 0xc0449f20 (do_link_state_change+0x1e4)
sp = 0xd3ab0d20 fp = 0xd3ab0d48
r4 = 0xd7495c00 r5 = 0xc0777af9
r6 = 0xd3cae81c r10 = 0xd6cd19e0
do_link_state_change() at do_link_state_change+0x1e4
pc = 0xc0449f20 lr = 0xc03744d4 (taskqueue_run_locked+0x1b4)
sp = 0xd3ab0d50 fp = 0xd3ab0da0
r4 = 0xd3d67800 r5 = 0xd3d67850
r6 = 0xd7495cf8 r7 = 0x00000001
r8 = 0x00000000 r9 = 0xc0783a61
r10 = 0x00000000
taskqueue_run_locked() at taskqueue_run_locked+0x1b4
pc = 0xc03744d4 lr = 0xc03742e4 (taskqueue_run+0x50)
sp = 0xd3ab0da8 fp = 0xd3ab0db0
r4 = 0xd3d67850 r5 = 0xd3d67800
r6 = 0xd3b6a200 r7 = 0xc3593a40
r8 = 0x00000000 r9 = 0xc07635e8
r10 = 0xd3b6a208
taskqueue_run() at taskqueue_run+0x50
pc = 0xc03742e4 lr = 0xc02c15a0 (ithread_loop+0x264)
sp = 0xd3ab0db8 fp = 0xd3ab0e18
r4 = 0x00000000 r5 = 0xd3b6a244
ithread_loop() at ithread_loop+0x264
pc = 0xc02c15a0 lr = 0xc02bd424 (fork_exit+0xa0)
sp = 0xd3ab0e20 fp = 0xd3ab0e38
r4 = 0xd3ab0e40 r5 = 0xc4f0dc00
r6 = 0xc02c133c r7 = 0xc4f0a000
r8 = 0xc3596d00 r9 = 0x00000000
r10 = 0x00000000
fork_exit() at fork_exit+0xa0
pc = 0xc02bd424 lr = 0xc062c2c0 (swi_exit)
sp = 0xd3ab0e40 fp = 0x00000000
r4 = 0xc02c133c r5 = 0xc3596d00
r6 = 0x00000000 r7 = 0x00000000
r8 = 0x00000000 r10 = 0x00000000
swi_exit() at swi_exit
pc = 0xc062c2c0 lr = 0xc062c2c0 (swi_exit)
sp = 0xd3ab0e40 fp = 0x00000000
KDB: enter: panic
[ thread pid 11 tid 100013 ]
Stopped at kdb_enter+0x54: ldrb r15, [r15, r15, ror r15]!
db>
A second raspberry pi2b running armv7 also crashes under the same conditions
but with a slightly different error. This machine uses an old usb2-pata bridge
to a mechanical hard drive of 32 GB capacity. The machine is running
bob@www:~ % uname -a
FreeBSD www.zefox.org 16.0-CURRENT FreeBSD 16.0-CURRENT #5
main-n282933-6c0bcd15e478: Wed Jan 7 20:01:40 PST 2026
bob@www.zefox.org:/usr/obj/usr/src/arm.armv7/sys/GENERIC arm
bob@www:~ % uname -KU
1600007 1600007
bob@www:~ %
root@www:~ # shutdown -r now
Shutdown NOW!
shutdown: [pid 5722]
root@www:~ #
*/etc/rc.shutdown: WARNING: $ftpd_enable is not set properly - see rc.conf(5).
Stopping sshd.
Waiting for PIDS: 3469.
Stopping sendmail.
Waiting for PIDS: 3474.
Stopping sendmail_msp_queue.
Waiting for PIDS: 3477.
Stopping powerd.
Waiting for PIDS: 3394.
/etc/rc.shutdown: WARNING: $keyserv_enable is not set properly - see
rc.conf(5).
Stopping devd.
Waiting for PIDS: 3207.
Writing entropy file: .
Writing early boot entropy file: .
.
Terminated
Jan 9 15:55:36 www syslogd: exiting on signal 15
Waiting (max 60 seconds) for system process `vnlru' to stop... done
Waiting (max 60 seconds) for system process `syncer' to stop... Syncing disks,
vnodes remaining... 1 0 done
All buffers synced.
Uptime: 23h8m53s
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
ue0: link state changed to DOWN
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smscphy0: detached
smsc0: warning: MII is busy
Kernel page faultmiibus0: detached
with the following non-sleepable locks held:
exclusive sleep mutex smsc0 (smsc0) r = 0 (0xd6a8d570) locked @
/usr/src/sys/dev/usb/net/if_smsc.c:665
stack backtrace:
#0 0xc0381c70 at witness_debugger+0x78
#1 0xc0382f1c at witness_warn+0x428
#2 0xc064d298 at abort_handler+0x1d4
#3 0xc062b8f0 at exception_exit+0
#4 0xc00d587c at smscphy_status+0x80
#5 0xc00d57e4 at smscphy_service+0x21c
#6 0xc00ce240 at mii_pollstat+0x60
#7 0xc01b4d20 at smsc_ifmedia_sts+0x44
#8 0xc0451a34 at ifmedia_ioctl+0x198
#9 0xc052546c at dump_iface+0x11c
#10 0xc0525258 at rtnl_handle_iflink+0x9c
#11 0xc044947c at do_link_state_change+0x1e4
#12 0xc0373a30 at taskqueue_run_locked+0x1b4
#13 0xc0373840 at taskqueue_run+0x50
#14 0xc02c0afc at ithread_loop+0x264
#15 0xc02bc980 at fork_exit+0xa0
#16 0xc062b884 at swi_exit+0
Fatal kernel mode data abort: 'Translation Fault (L1)' on read
trapframe: 0xd3ab4b28
FSR=00000005, FAR=deadc0de, spsr=60000013
r0 =0000003d, r1 =9c106320, r2 =9c106320, r3 =00000000
r4 =d741df00, r5 =00000000, r6 =deadc0de, r7 =deadc0de
r8 =d7425080, r9 =c091e518, r10=00000000, r11=d3ab4bd8
r12=d3ab4adc, ssp=d3ab4bb8, slr=c01b2fc8, pc =c00d587c
panic: Fatal abort
cpuid = 0
time = 1768002938
KDB: stack backtrace:
db_trace_self() at db_trace_self
pc = 0xc0629134 lr = 0xc0077388 (db_trace_self_wrapper+0x30)
sp = 0xd3ab4900 fp = 0xd3ab4a18
db_trace_self_wrapper() at db_trace_self_wrapper+0x30
pc = 0xc0077388 lr = 0xc03087cc (vpanic+0x140)
sp = 0xd3ab4a20 fp = 0xd3ab4a40
r4 = 0x00000100 r5 = 0x00000000
r6 = 0xc0721459 r7 = 0xc0b7a8c4
vpanic() at vpanic+0x140
pc = 0xc03087cc lr = 0xc030868c (vpanic)
sp = 0xd3ab4a48 fp = 0xd3ab4a4c
r4 = 0xd3ab4b28 r5 = 0x00000013
r6 = 0xdeadc0de r7 = 0x00000005
r8 = 0x00000005 r9 = 0x00000013
r10 = 0xdeadc0de
vpanic() at vpanic
pc = 0xc030868c lr = 0xc064d87c (abort_align)
sp = 0xd3ab4a54 fp = 0xd3ab4a80
r4 = 0x00000005 r5 = 0x00000005
r6 = 0x00000013 r7 = 0xdeadc0de
r8 = 0xd3ab4a4c r9 = 0xc030868c
r10 = 0xd3ab4a54
abort_align() at abort_align
pc = 0xc064d87c lr = 0xc064d3c4 (abort_handler+0x300)
sp = 0xd3ab4a88 fp = 0xd3ab4b20
r4 = 0xc4f0dc00 r10 = 0xdeadc0de
abort_handler() at abort_handler+0x300
pc = 0xc064d3c4 lr = 0xc062b8f0 (exception_exit)
sp = 0xd3ab4b28 fp = 0xd3ab4bd8
r4 = 0xd741df00 r5 = 0x00000000
r6 = 0xdeadc0de r7 = 0xdeadc0de
r8 = 0xd7425080 r9 = 0xc091e518
r10 = 0x00000000
exception_exit() at exception_exit
pc = 0xc062b8f0 lr = 0xc01b2fc8 (smsc_miibus_readreg+0x74)
sp = 0xd3ab4bb8 fp = 0xd3ab4bd8
r0 = 0x0000003d r1 = 0x9c106320
r2 = 0x9c106320 r3 = 0x00000000
r4 = 0xd741df00 r5 = 0x00000000
r6 = 0xdeadc0de r7 = 0xdeadc0de
r8 = 0xd7425080 r9 = 0xc091e518
r10 = 0x00000000 r12 = 0xd3ab4adc
smscphy_status() at smscphy_status+0x80
pc = 0xc00d587c lr = 0xc00d57e4 (smscphy_service+0x21c)
sp = 0xd3ab4be0 fp = 0xd3ab4c00
r4 = 0x00000003 r5 = 0xd741df00
r6 = 0xd7432000 r7 = 0xc0731240
r8 = 0x00000000 r9 = 0xc097a7b0
r10 = 0x00000000
smscphy_service() at smscphy_service+0x21c
pc = 0xc00d57e4 lr = 0xc00ce240 (mii_pollstat+0x60)
sp = 0xd3ab4c08 fp = 0xd3ab4c18
r4 = 0xd7425080 r5 = 0xd741df00
r6 = 0xd7432000 r7 = 0xc0731240
r8 = 0x00000000 r9 = 0xc097a7b0
r10 = 0x00000000
mii_pollstat() at mii_pollstat+0x60
pc = 0xc00ce240 lr = 0xc01b4d20 (smsc_ifmedia_sts+0x44)
sp = 0xd3ab4c20 fp = 0xd3ab4c30
r4 = 0xd3ab4c78 r5 = 0xd6a8d580
r6 = 0xd7425080 r10 = 0x00000000
smsc_ifmedia_sts() at smsc_ifmedia_sts+0x44
pc = 0xc01b4d20 lr = 0xc0451a34 (ifmedia_ioctl+0x198)
sp = 0xd3ab4c38 fp = 0xd3ab4c48
r4 = 0xd3ab4c78 r5 = 0x00000000
r6 = 0xd7425080 r7 = 0x00000020
ifmedia_ioctl() at ifmedia_ioctl+0x198
pc = 0xc0451a34 lr = 0xc052546c (dump_iface+0x11c)
sp = 0xd3ab4c50 fp = 0xd3ab4cc0
r4 = 0xd3ab4cd4 r5 = 0xd7416c00
r6 = 0xd3ab4c78 r7 = 0xdafdf024
dump_iface() at dump_iface+0x11c
pc = 0xc052546c lr = 0xc0525258 (rtnl_handle_iflink+0x9c)
sp = 0xd3ab4cc8 fp = 0xd3ab4d18
r4 = 0xd7416c00 r5 = 0xd3ab4cd4
r6 = 0x00000000 r7 = 0xd3cae800
r8 = 0x00000001 r9 = 0x00000000
r10 = 0xd6ccea00
rtnl_handle_iflink() at rtnl_handle_iflink+0x9c
pc = 0xc0525258 lr = 0xc044947c (do_link_state_change+0x1e4)
sp = 0xd3ab4d20 fp = 0xd3ab4d48
r4 = 0xd7416c00 r5 = 0xc0776ed6
r6 = 0xd3cae81c r10 = 0xd6ccea00
do_link_state_change() at do_link_state_change+0x1e4
pc = 0xc044947c lr = 0xc0373a30 (taskqueue_run_locked+0x1b4)
sp = 0xd3ab4d50 fp = 0xd3ab4da0
r4 = 0xd3d67800 r5 = 0xd3d67850
r6 = 0xd7416cf8 r7 = 0x00000001
r8 = 0x00000000 r9 = 0xc0782db1
r10 = 0x00000000
taskqueue_run_locked() at taskqueue_run_locked+0x1b4
pc = 0xc0373a30 lr = 0xc0373840 (taskqueue_run+0x50)
sp = 0xd3ab4da8 fp = 0xd3ab4db0
r4 = 0xd3d67850 r5 = 0xd3d67800
r6 = 0xd3b6a200 r7 = 0xc3593a40
r8 = 0x00000000 r9 = 0xc0762a0a
r10 = 0xd3b6a208
taskqueue_run() at taskqueue_run+0x50
pc = 0xc0373840 lr = 0xc02c0afc (ithread_loop+0x264)
sp = 0xd3ab4db8 fp = 0xd3ab4e18
r4 = 0x00000000 r5 = 0xd3b6a244
ithread_loop() at ithread_loop+0x264
pc = 0xc02c0afc lr = 0xc02bc980 (fork_exit+0xa0)
sp = 0xd3ab4e20 fp = 0xd3ab4e38
r4 = 0xd3ab4e40 r5 = 0xc4f0dc00
r6 = 0xc02c0898 r7 = 0xc4f0a000
r8 = 0xc3596d20 r9 = 0x00000000
r10 = 0x00000000
fork_exit() at fork_exit+0xa0
pc = 0xc02bc980 lr = 0xc062b884 (swi_exit)
sp = 0xd3ab4e40 fp = 0x00000000
r4 = 0xc02c0898 r5 = 0xc3596d20
r6 = 0x00000000 r7 = 0x00000000
r8 = 0x00000000 r10 = 0x00000000
swi_exit() at swi_exit
pc = 0xc062b884 lr = 0xc062b884 (swi_exit)
sp = 0xd3ab4e40 fp = 0x00000000
KDB: enter: panic
[ thread pid 11 tid 100013 ]
Stopped at kdb_enter+0x54: ldrb r15, [r15, r15, ror r15]!
db>
Issuing a reboot command to the debugger successfully restarts the machine.
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