Date: Mon, 25 May 2026 19:03:25 -0700 From: bob prohaska <fbsd@www.zefox.net> To: Gleb Smirnoff <glebius@freebsd.org> Cc: freebsd-current@freebsd.org, freebsd-arm@freebsd.org Subject: Panic on shutdown with Pi2B for May 2026 stabilization week Message-ID: <ahT_bSjgfIL6xyDb@www.zefox.net> In-Reply-To: <ahQBi0Ntgn2iek3J@cell.glebi.us>
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On Mon, May 25, 2026 at 01:00:11AM -0700, Gleb Smirnoff wrote: > Hi FreeBSD/main users & developers: > > > git pull > git checkout 490c53e9353f After doing the above, updating everything and rebooting a Pi2B (armv7) the result is a panic near the end of the reboot process: Mon May 25 18:08:46 PDT 2026 FreeBSD/arm (pelorus.zefox.org) (ttyu0) login: root Password: May 25 18:30:44 pelorus login[2175]: ROOT LOGIN (root) ON ttyu0 Last login: Mon May 25 17:41:27 on ttyu0 FreeBSD 16.0-CURRENT (GENERIC) #43 n286096-490c53e9353f: Mon May 25 10:45:18 PDT 2026 Welcome to FreeBSD! Release Notes, Errata: https://www.FreeBSD.org/releases/ Security Advisories: https://www.FreeBSD.org/security/ FreeBSD Handbook: https://www.FreeBSD.org/handbook/ FreeBSD FAQ: https://www.FreeBSD.org/faq/ Questions List: https://www.FreeBSD.org/lists/questions/ FreeBSD Forums: https://forums.FreeBSD.org/ Documents installed with the system are in the /usr/local/share/doc/freebsd/ directory, or can be installed later with: pkg install en-freebsd-doc For other languages, replace "en" with a language code like de or fr. Show the version of FreeBSD installed: freebsd-version ; uname -a Please include that output and any error messages when posting questions. Introduction to manual pages: man man FreeBSD directory layout: man hier To change this login announcement, see motd(5). root@pelorus:~ # shutdown -r now Shutdown NOW! shutdown: [pid 2253] root@pelorus:~ # *** FINAL SysStopping sshd. Waiting for PIDS: 2133. Stopping sendmail. Waiting for PIDS: 2138. Stopping sendmail_msp_queue. Waiting for PIDS: 2141. Stopping cron. Waiting for PIDS: 2148. Stopping powerd. Waiting for PIDS: 2033. Stopping devd. Waiting for PIDS: 1627. Writing entropy file: . Writing early boot entropy file: . . Terminated May 25 18:31:02 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... 1 0 done All buffers synced. Uptime: 23m41s 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 (0xd7419570) locked @ /usr/src/sys/dev/usb/net/if_smsc.c:665 stack backtrace: #0 0xc03a0cec at witness_debugger+0x78 #1 0xc03a2648 at witness_warn+0x4a4 #2 0xc068a9b0 at abort_handler+0x1fc #3 0xc0668840 at exception_exit+0 #4 0xc00db8a0 at smscphy_status+0x80 #5 0xc00db808 at smscphy_service+0x21c #6 0xc00d4134 at mii_pollstat+0x60 #7 0xc01c57f8 at smsc_ifmedia_sts+0x44 #8 0xc0479164 at ifmedia_ioctl+0x198 #9 0xc0555948 at dump_iface+0x11c #10 0xc0555720 at rtnl_handle_iflink+0xac #11 0xc0470604 at do_link_state_change+0x1e4 #12 0xc0392448 at taskqueue_run_locked+0x1c4 #13 0xc0392248 at taskqueue_run+0x50 #14 0xc02d8c24 at ithread_loop+0x264 #15 0xc02d48fc at fork_exit+0xa0 #16 0xc06687d4 at swi_exit+0 Fatal kernel mode data abort: 'Translation Fault (L1)' on read trapframe: 0xd3ab0b28 FSR=00000005, FAR=deadc0de, spsr=60000013 r0 =0000003d, r1 =5d34e6ba, r2 =5d34e6ba, r3 =00000000 r4 =d7401080, r5 =00000000, r6 =deadc0de, r7 =deadc0de r8 =d73f7f80, r9 =c095e804, r10=00000000, r11=d3ab0bd8 r12=d3ab0ad4, ssp=d3ab0bb8, slr=c01c3958, pc =c00db8a0 panic: Fatal abort cpuid = 1 time = 1779759064 KDB: stack backtrace: db_trace_self() at db_trace_self pc = 0xc0665ea8 lr = 0xc007a200 (db_trace_self_wrapper+0x40) sp = 0xd3ab0900 fp = 0xd3ab0a18 db_trace_self_wrapper() at db_trace_self_wrapper+0x40 pc = 0xc007a200 lr = 0xc0322788 (vpanic+0x15c) sp = 0xd3ab0a20 fp = 0xd3ab0a40 r4 = 0x00000100 r5 = 0xc0763ff4 r6 = 0xc0bbe474 r7 = 0x00000000 vpanic() at vpanic+0x15c pc = 0xc0322788 lr = 0xc032262c (vpanic) sp = 0xd3ab0a48 fp = 0xd3ab0a4c r4 = 0xd3ab0b28 r5 = 0x00000013 r6 = 0xdeadc0de r7 = 0x00000005 r8 = 0x00000005 r9 = 0x00000013 r10 = 0xdeadc0de vpanic() at vpanic pc = 0xc032262c lr = 0xc068b08c (abort_align) sp = 0xd3ab0a54 fp = 0xd3ab0a80 r4 = 0x00000005 r5 = 0x00000005 r6 = 0x00000013 r7 = 0xdeadc0de r8 = 0xd3ab0a4c r9 = 0xc032262c r10 = 0xd3ab0a54 abort_align() at abort_align pc = 0xc068b08c lr = 0xc068a9dc (abort_handler+0x228) sp = 0xd3ab0a88 fp = 0xd3ab0b20 r4 = 0xc4f0dc00 r10 = 0xdeadc0de abort_handler() at abort_handler+0x228 pc = 0xc068a9dc lr = 0xc0668840 (exception_exit) sp = 0xd3ab0b28 fp = 0xd3ab0bd8 r4 = 0xd7401080 r5 = 0x00000000 r6 = 0xdeadc0de r7 = 0xdeadc0de r8 = 0xd73f7f80 r9 = 0xc095e804 r10 = 0x00000000 exception_exit() at exception_exit pc = 0xc0668840 lr = 0xc01c3958 (smsc_miibus_readreg+0x84) sp = 0xd3ab0bb8 fp = 0xd3ab0bd8 r0 = 0x0000003d r1 = 0x5d34e6ba r2 = 0x5d34e6ba r3 = 0x00000000 r4 = 0xd7401080 r5 = 0x00000000 r6 = 0xdeadc0de r7 = 0xdeadc0de r8 = 0xd73f7f80 r9 = 0xc095e804 r10 = 0x00000000 r12 = 0xd3ab0ad4 smscphy_status() at smscphy_status+0x80 pc = 0xc00db8a0 lr = 0xc00db808 (smscphy_service+0x21c) sp = 0xd3ab0be0 fp = 0xd3ab0c00 r4 = 0x00000003 r5 = 0xd7401080 r6 = 0xd7437f60 r7 = 0xc0773c1e r8 = 0x00000000 r9 = 0xc09ba948 r10 = 0x00000000 smscphy_service() at smscphy_service+0x21c pc = 0xc00db808 lr = 0xc00d4134 (mii_pollstat+0x60) sp = 0xd3ab0c08 fp = 0xd3ab0c18 r4 = 0xd73f7f80 r5 = 0xd7401080 r6 = 0xd7437f60 r7 = 0xc0773c1e r8 = 0x00000000 r9 = 0xc09ba948 r10 = 0x00000000 mii_pollstat() at mii_pollstat+0x60 pc = 0xc00d4134 lr = 0xc01c57f8 (smsc_ifmedia_sts+0x44) sp = 0xd3ab0c20 fp = 0xd3ab0c30 r4 = 0xd3ab0c70 r5 = 0xd7419580 r6 = 0xd73f7f80 r10 = 0x00000000 smsc_ifmedia_sts() at smsc_ifmedia_sts+0x44 pc = 0xc01c57f8 lr = 0xc0479164 (ifmedia_ioctl+0x198) sp = 0xd3ab0c38 fp = 0xd3ab0c48 r4 = 0xd3ab0c70 r5 = 0x00000000 r6 = 0xd73f7f80 r7 = 0x00000020 ifmedia_ioctl() at ifmedia_ioctl+0x198 pc = 0xc0479164 lr = 0xc0555948 (dump_iface+0x11c) sp = 0xd3ab0c50 fp = 0xd3ab0cc0 r4 = 0xd3ab0cd0 r5 = 0xd7435c00 r6 = 0xd3ab0c70 r7 = 0xd74f6024 dump_iface() at dump_iface+0x11c pc = 0xc0555948 lr = 0xc0555720 (rtnl_handle_iflink+0xac) sp = 0xd3ab0cc8 fp = 0xd3ab0d18 r4 = 0xd7435c00 r5 = 0xd3ab0cd0 r6 = 0x00000000 r7 = 0xd6ccc180 r8 = 0x00000001 r9 = 0x00000000 r10 = 0xd3d9e100 rtnl_handle_iflink() at rtnl_handle_iflink+0xac pc = 0xc0555720 lr = 0xc0470604 (do_link_state_change+0x1e4) sp = 0xd3ab0d20 fp = 0xd3ab0d48 r4 = 0xd7435c00 r5 = 0xc07b9ee5 r6 = 0xd6ccc19c r10 = 0xd3d9e100 do_link_state_change() at do_link_state_change+0x1e4 pc = 0xc0470604 lr = 0xc0392448 (taskqueue_run_locked+0x1c4) sp = 0xd3ab0d50 fp = 0xd3ab0da0 r4 = 0xd3b45600 r5 = 0xd3b45650 r6 = 0xd7435cf8 r7 = 0x00000001 r8 = 0x00000000 r9 = 0xc07c5f2c r10 = 0x00000000 taskqueue_run_locked() at taskqueue_run_locked+0x1c4 pc = 0xc0392448 lr = 0xc0392248 (taskqueue_run+0x50) sp = 0xd3ab0da8 fp = 0xd3ab0db0 r4 = 0xd3b45650 r5 = 0xd3b45600 r6 = 0xd3d44000 r7 = 0xd3c8e980 r8 = 0x00000000 r9 = 0xc07a56c5 r10 = 0xd3d44008 taskqueue_run() at taskqueue_run+0x50 pc = 0xc0392248 lr = 0xc02d8c24 (ithread_loop+0x264) sp = 0xd3ab0db8 fp = 0xd3ab0e18 r4 = 0x00000000 r5 = 0xd3d44044 ithread_loop() at ithread_loop+0x264 pc = 0xc02d8c24 lr = 0xc02d48fc (fork_exit+0xa0) sp = 0xd3ab0e20 fp = 0xd3ab0e38 r4 = 0xd3ab0e40 r5 = 0xc4f0dc00 r6 = 0xc02d89c0 r7 = 0xc4f0a000 r8 = 0xd3cee140 r9 = 0x00000000 r10 = 0x00000000 fork_exit() at fork_exit+0xa0 pc = 0xc02d48fc lr = 0xc06687d4 (swi_exit) sp = 0xd3ab0e40 fp = 0x00000000 r4 = 0xc02d89c0 r5 = 0xd3cee140 r6 = 0x00000000 r7 = 0x00000000 r8 = 0x00000000 r10 = 0x00000000 swi_exit() at swi_exit pc = 0xc06687d4 lr = 0xc06687d4 (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> There seem to be two workarounds. One is to simply disconnect the Pi's ethernet cable before rebooting. The other is to apply the patch offered in https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=290417 Might it be possible to merge the patch? Thanks for reading, bob prohaskahome | help
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