On Sun, Jan 28, 2018 at 7:38 PM, Cy Schubert <Cy.Schubert_at_cschubert.com> wrote: > In message <2effa324-c428-6135-371b-acb00c803d29_at_freebsd.org>, Allan > Jude write > s: > > On 2018-01-28 16:28, Warner Losh wrote: > > > On Sun, Jan 28, 2018 at 2:22 PM, thomas masper < > thomas.masper_at_gmail.com> > > > wrote: > > > > > >> Hi, > > >> similar panic happen to me when extracting a pendrive from laptop USB > port > > >> (I tried 3 different pendrive). > > >> No issue if I reboot or shutdown. I don't know if those two issues are > > >> related. > > >> > > > > > > Do you have a reproducible test case? Ideally, it would be 'insert and > > > remove usb thumb drive' but maybe there's more steps between insert and > > > removal. > > > > > > Warner > > > > > > > > > > > >> panic: Releasing 6 with cnt = -559038242 > > Converting this to hex we get DEADC0DE. vm/uma_dbg.c:static const uint32_t uma_junk = 0xdeadc0de; Use after free it is then... Warner > > >> > > >> GNU gdb (GDB) 8.0.1 [GDB v8.0.1 for FreeBSD] > > >> Copyright (C) 2017 Free Software Foundation, Inc. > > >> License GPLv3+: GNU GPL version 3 or later < > http://gnu.org/licenses/gpl. > > >> html > > >>> > > >> This is free software: you are free to change and redistribute it. > > >> There is NO WARRANTY, to the extent permitted by law. Type "show > copying" > > >> and "show warranty" for details. > > >> This GDB was configured as "x86_64-portbld-freebsd12.0". > > >> Type "show configuration" for configuration details. > > >> For bug reporting instructions, please see: > > >> <http://www.gnu.org/software/gdb/bugs/>. > > >> Find the GDB manual and other documentation resources online at: > > >> <http://www.gnu.org/software/gdb/documentation/>. > > >> For help, type "help". > > >> Type "apropos word" to search for commands related to "word"... > > >> Reading symbols from /boot/kernel/kernel...Reading symbols from > > >> /usr/lib/debug//boot/kernel/kernel.debug...done. > > >> done. > > >> > > >> Unread portion of the kernel message buffer: > > >> da0 at umass-sim0 bus 0 scbus4 target 0 lun 0 > > >> da0: <Generic Flash Disk 8.07> s/n 30E47C20 detached > > >> (da0:umass-sim0:0:0:0): Periph destroyed > > >> panic: Releasing 6 with cnt = -559038242 > > >> cpuid = 0 > > >> time = 1517158352 > > >> KDB: stack backtrace: > > >> db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame > > >> 0xfffffe00593838c0 > > >> vpanic() at vpanic+0x18d/frame 0xfffffe0059383920 > > >> panic() at panic+0x43/frame 0xfffffe0059383980 > > >> dadiskgonecb() at dadiskgonecb+0x42/frame 0xfffffe00593839a0 > > >> g_disk_providergone() at g_disk_providergone+0x25/frame > 0xfffffe00593839d0 > > >> g_destroy_provider() at g_destroy_provider+0xae/frame > 0xfffffe00593839f0 > > >> g_wither_washer() at g_wither_washer+0x87/frame 0xfffffe0059383a30 > > >> g_run_events() at g_run_events+0x3ca/frame 0xfffffe0059383a70 > > >> fork_exit() at fork_exit+0x84/frame 0xfffffe0059383ab0 > > >> fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0059383ab0 > > >> --- trap 0, rip = 0, rsp = 0, rbp = 0 --- > > >> KDB: enter: panic > > >> > > >> __curthread () at ./machine/pcpu.h:229 > > >> 229 __asm("movq %%gs:%1,%0" : "=r" (td) > > >> (kgdb) #0 __curthread () at ./machine/pcpu.h:229 > > >> #1 doadump (textdump=0) at /usr/src/sys/kern/kern_shutdown.c:346 > > >> #2 0xffffffff8040a08b in db_dump (dummy=<optimized out>, > > >> dummy2=<unavailable>, dummy3=<unavailable>, dummy4=<unavailable>) > > >> at /usr/src/sys/ddb/db_command.c:574 > > >> #3 0xffffffff80409e59 in db_command (last_cmdp=<optimized out>, > > >> cmd_table=<optimized out>, dopager=<optimized out>) > > >> at /usr/src/sys/ddb/db_command.c:481 > > >> #4 0xffffffff80409bd4 in db_command_loop () > > >> at /usr/src/sys/ddb/db_command.c:534 > > >> #5 0xffffffff8040cdff in db_trap (type=<optimized out>, > code=<optimized > > >> out>) > > >> at /usr/src/sys/ddb/db_main.c:250 > > >> #6 0xffffffff80b0d923 in kdb_trap (type=3, code=-61456, tf=<optimized > > >> out>) > > >> at /usr/src/sys/kern/subr_kdb.c:697 > > >> #7 0xffffffff80f7b498 in trap (frame=0xfffffe00593837f0) > > >> at /usr/src/sys/amd64/amd64/trap.c:547 > > >> #8 <signal handler called> > > >> #9 kdb_enter (why=0xffffffff811f101e "panic", msg=<optimized out>) > > >> at /usr/src/sys/kern/subr_kdb.c:479 > > >> #10 0xffffffff80ac8d3a in vpanic (fmt=<optimized out>, > > >> ap=0xfffffe0059383960) > > >> at /usr/src/sys/kern/kern_shutdown.c:800 > > >> #11 0xffffffff80ac8dc3 in panic ( > > >> fmt=0xffffffff81b1bbd8 <cnputs_mtx> "\257\257\033\201\377\377\377\ > > >> 377") > > >> at /usr/src/sys/kern/kern_shutdown.c:738 > > >> #12 0xffffffff80368bb2 in da_periph_release (periph=<optimized out>, > > >> token=DA_REF_GEOM) at /usr/src/sys/cam/scsi/scsi_da.c:1591 > > >> #13 dadiskgonecb (dp=<optimized out>) at > > >> /usr/src/sys/cam/scsi/scsi_da.c:1904 > > >> #14 0xffffffff80a0fdd5 in g_disk_providergone (pp=0xfffff80003e8b700) > > >> at /usr/src/sys/geom/geom_disk.c:783 > > >> #15 0xffffffff80a15f9e in g_destroy_provider (pp=0xfffff80003e8b700) > > >> at /usr/src/sys/geom/geom_subr.c:746 > > >> #16 0xffffffff80a15e17 in g_wither_washer () > > >> at /usr/src/sys/geom/geom_subr.c:461 > > >> #17 0xffffffff80a112da in g_run_events () > > >> at /usr/src/sys/geom/geom_event.c:297 > > >> #18 0xffffffff80a89444 in fork_exit ( > > >> callout=0xffffffff80a138c0 <g_event_procbody>, arg=0x0, > > >> frame=0xfffffe0059383ac0) at /usr/src/sys/kern/kern_fork.c:1039 > > >> #19 <signal handler called> > > >> (kgdb) > > >> > > >> > > >> uname -a > > >> FreeBSD laptopW530.tommyBSD.org 12.0-CURRENT FreeBSD 12.0-CURRENT #13 > > >> r328509M: Sun Jan 28 15:38:35 CET 2018 > > >> tommy_at_laptopW530.tommyBSD.org:/usr/obj/usr/src/amd64.amd64/ > sys/GENERIC > > >> amd64 > > >> > > >> Regards, > > >> thomas > > >> > > >> > > >> On Fri, Jan 26, 2018 at 4:07 PM, David Wolfskill < > david_at_catwhisker.org> > > >> wrote: > > >> > > >>> On Fri, Jan 26, 2018 at 07:47:48AM -0700, Warner Losh wrote: > > >>>> On Fri, Jan 26, 2018 at 5:29 AM, David Wolfskill < > david_at_catwhisker.org > > >>> > > >>>> wrote: > > >>>> > > >>>>> This is on my "build machine" (laptop is still building updated > ports > > >>>>> for today, so I don't know yet whether or not it encounters this.) > > >>>>> > > >>>> > > >>>> Running a kernel with INVARIANTS, right? > > >>> > > >>> Yes -- GENERIC. > > >>> > > >>>>> I had performed a source-based update from r328393 to r328436, > > >>>>> rebooted, performed "make delete-old-libs", and all seemed well. > > >>>>> > > >>>> > > >>>> This has my change 328415 in it. > > >>> > > >>> :-) > > >>> > > >>>>> I then issued "sudo shutdown -p now", and serial console shows: > > >>>>> panic: Unholding 6 with cnt = -559038242 > > >>>>> cpuid = 3 > > >>>>> time = 1516968697 > > >>>>> KDB: stack backtrace: > > >>>>> db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame > > >>>>> 0xfffffe00004288c0 > > >>>>> vpanic() at vpanic+0x18d/frame 0xfffffe0000428920 > > >>>>> panic() at panic+0x43/frame 0xfffffe0000428980 > > >>>>> dadiskgonecb() at dadiskgonecb+0x42/frame 0xfffffe00004289a0 > > >>>>> g_disk_providergone() at g_disk_providergone+0x25/frame > > >>> 0xfffffe00004289d0 > > >>>>> g_destroy_provider() at g_destroy_provider+0xae/frame > > >>> 0xfffffe00004289f0 > > >>>>> g_wither_washer() at g_wither_washer+0x87/frame 0xfffffe0000428a30 > > >>>>> g_run_events() at g_run_events+0x3ca/frame 0xfffffe0000428a70 > > >>>>> fork_exit() at fork_exit+0x84/frame 0xfffffe0000428ab0 > > >>>>> fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0000428ab0 > > >>>>> --- trap 0, rip = 0, rsp = 0, rbp = 0 --- > > >>>>> KDB: enter: panic > > >>>>> [ thread pid 13 tid 100044 ] > > >>>>> Stopped at kdb_enter+0x3b: movq $0,kdb_why > > >>>>> db> > > >>>>> > > >>>> > > >>>> That's no good. We're releasing a reference to the da peripheral > > >> because > > >>>> geom has finished with the disk and is giving us a final callback > so we > > >>> can > > >>>> drop the reference we took when we created the geom. Trouble is, cnt > > >>> should > > >>>> be like 1 always for this code, but it's not. It looks like it may > be > > >>> bytes > > >>>> to a pointer :( > > >>>> > > >>>> > > >>>>> As noted, this is a build machine, and it was to be powered off for > > >>>>> the rest of the day anyway, so I don't need to get it up & running > > >>>>> immediately: I can poke at the ddb prompt, given some clues. > > >>>>> > > >>>> > > >>>> I don't suppose you can attach kgdb to this machine? I'd be > interested > > >> to > > >>>> see what the contents of the softc are...a > > >>> > > >>> Pointer to how to do that? > > >>> > > >>> I do have ddb right now.... > > >>> > > >>>> .... > > >>>> Thanks for the report. This is quite troubling. > > >>> > > >>> Well, let's get it fixed, then! :-) > > >>> > > >>>> Warner > > >>>> .... > > >>> > > >>> I should still have access to the serial console after I get in to > the > > >>> office (heading out shortly). > > >>> > > >>> Peace, > > >>> david > > >>> -- > > >>> David H. Wolfskill david_at_catwhisker.org > > >>> "unfortunately, no trust!” -- well, of course! You reap what you > sow. > > >>> > > >>> See http://www.catwhisker.org/~david/publickey.gpg for my public > key. > > >>> > > >> _______________________________________________ > > >> freebsd-current_at_freebsd.org mailing list > > >> https://lists.freebsd.org/mailman/listinfo/freebsd-current > > >> To unsubscribe, send any mail to "freebsd-current-unsubscribe_at_ > freebsd.org" > > >> > > > _______________________________________________ > > > freebsd-current_at_freebsd.org mailing list > > > https://lists.freebsd.org/mailman/listinfo/freebsd-current > > > To unsubscribe, send any mail to "freebsd-current-unsubscribe_at_ > freebsd.org" > > > > > > > I've been seeing this today while working on my laptop. > > > > 1) insert USB stick. > > 2) mount UFS partition to /mnt > > 3) copy a file off > > 4) umount /mnt > > 5) remove usb stick > > 6) instant panic > > > > Oddly, it is the same negative number every time (-559038242), so it > > isn't random/memory corruption. > > > > > > -- > > Allan Jude > > _______________________________________________ > > freebsd-current_at_freebsd.org mailing list > > https://lists.freebsd.org/mailman/listinfo/freebsd-current > > To unsubscribe, send any mail to "freebsd-current-unsubscribe_at_ > freebsd.org" > > > > > -- > Cheers, > Cy Schubert <Cy.Schubert_at_cschubert.com> > FreeBSD UNIX: <cy_at_FreeBSD.org> Web: http://www.FreeBSD.org > > The need of the many outweighs the greed of the few. > > > > _______________________________________________ > freebsd-current_at_freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe_at_freebsd.org" > >Received on Mon Jan 29 2018 - 02:19:01 UTC
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