Date: Tue, 21 Aug 2018 11:30:51 +0200 From: Marko Zec <zec@fer.hr> To: Olivier =?ISO-8859-1?Q?Cochard-Labb=E9?= <olivier@freebsd.org> Cc: freebsd-current <freebsd-current@freebsd.org> Subject: Re: Loading carp module crash i386 (12-ALPHA2), seems VNET related Message-ID: <20180821113051.7d35bc39@x23> In-Reply-To: <CA%2Bq%2BTcqN-YAXKQuZPQcrjmgABJJ22Pm%2B9-B9%2BZ8LH==0o%2Bg2BA@mail.gmail.com> References: <CA%2Bq%2BTcqN-YAXKQuZPQcrjmgABJJ22Pm%2B9-B9%2BZ8LH==0o%2Bg2BA@mail.gmail.com>
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On Mon, 20 Aug 2018 16:26:29 +0200 Olivier Cochard-Labb=C3=A9 <olivier@freebsd.org> wrote: > Just loading carp kernel module is enough to panic it: >=20 > [root@router]~# uname -a > FreeBSD router.bsdrp.net 12.0-ALPHA2 FreeBSD 12.0-ALPHA2 r338100M > i386 [root@router]~# kldload carp > Fatal trap 12: page fault while in kernel mode How many vnets were already instantiated at the time of kldloading carp? Does the panic ocur with no (non-default) vnets instantiated? > cpuid =3D 0; apic id =3D 00 > fault virtual address =3D 0x14de0f4c > fault code =3D supervisor write, page not present > instruction pointer =3D 0x20:0x1201657c > stack pointer =3D 0x28:0x11f3e804 > frame pointer =3D 0x28:0x11f3e80c > code segment =3D base 0x0, limit 0xfffff, type 0x1b > =3D DPL 0, pres 1, def32 1, gran 1 > processor eflags =3D interrupt enabled, resume, IOPL =3D 0 > current process =3D 55291 (kldload) > [ thread pid 55291 tid 100070 ] > Stopped at vnet_carpstats_init+0x2c: movl > %eax,__stop_set_vnet(%ecx,%esi,1) >=20 > A backtrace on kgdb gives this output: >=20 > (kgdb) bt > #0 __curthread () at ./machine/pcpu.h:226 > #1 doadump (textdump=3D<optimized out>) at > /usr/local/BSDRP/TESTING/FreeBSD/src/sys/kern/kern_shutdown.c:366 > #2 0x009f69ee in db_dump (dummy=3D302081404, dummy2=3Dfalse, dummy3=3D-1, > dummy4=3D0x11f3e4fc "") at > /usr/local/BSDRP/TESTING/FreeBSD/src/sys/ddb/db_command.c:574 > #3 0x009f67c7 in db_command (last_cmdp=3D<optimized out>, > cmd_table=3D<optimized out>, dopager=3D<optimized out>) at > /usr/local/BSDRP/TESTING/FreeBSD/src/sys/ddb/db_command.c:481 > #4 0x009f6520 in db_command_loop () at > /usr/local/BSDRP/TESTING/FreeBSD/src/sys/ddb/db_command.c:534 > #5 0x009f978d in db_trap (type=3D12, code=3D0) at > /usr/local/BSDRP/TESTING/FreeBSD/src/sys/ddb/db_main.c:252 > #6 0x0113e29e in kdb_trap (type=3D12, code=3D0, tf=3D0x11f3e7c4) at > /usr/local/BSDRP/TESTING/FreeBSD/src/sys/kern/subr_kdb.c:693 > #7 0x016d593c in trap_fatal (frame=3D0x11f3e7c4, eva=3D<optimized out>) > at /usr/local/BSDRP/TESTING/FreeBSD/src/sys/i386/i386/trap.c:989 > #8 0x016d5a43 in trap_pfault (frame=3D<optimized out>, usermode=3D0, > eva=3D350097228) at > /usr/local/BSDRP/TESTING/FreeBSD/src/sys/i386/i386/trap.c:827 > #9 0x016d508f in trap (frame=3D0x11f3e7c4) at > /usr/local/BSDRP/TESTING/FreeBSD/src/sys/i386/i386/trap.c:519 > #10 0xffc0315d in ?? () > #11 0x11f3e7c4 in ?? () > #12 0x0121c7ef in vnet_register_sysinit (arg=3D0x120182cc > <vnet_carpstats_init_vnet_init>) at > /usr/local/BSDRP/TESTING/FreeBSD/src/sys/net/vnet.c:500 > #13 0x010c18f0 in linker_file_sysinit (lf=3D<optimized out>) at > /usr/local/BSDRP/TESTING/FreeBSD/src/sys/kern/kern_linker.c:236 > #14 linker_load_file (filename=3D<optimized out>, result=3D<optimized > out>) > out>at /usr/local/BSDRP/TESTING/FreeBSD/src/sys/kern/kern_linker.c:462 > #15 linker_load_module (kldname=3D<optimized out>, modname=3D0x11449c00 > "carp", parent=3D0x0, verinfo=3D0x0, lfpp=3D0x11f3ea6c) at > /usr/local/BSDRP/TESTING/FreeBSD/src/sys/kern/kern_linker.c:2092 > #16 0x010c30d1 in kern_kldload (td=3D0x1157c380, file=3D0x11449c00 "carp", > fileid=3D0x11f3ea98) at > /usr/local/BSDRP/TESTING/FreeBSD/src/sys/kern/kern_linker.c:1071 > #17 0x010c31ee in sys_kldload (td=3D0x1157c380, uap=3D0x1157c604) at > /usr/local/BSDRP/TESTING/FreeBSD/src/sys/kern/kern_linker.c:1097 > #18 0x016d6217 in syscallenter (td=3D<optimized out>) at > /usr/local/BSDRP/TESTING/FreeBSD/src/sys/i386/i386/../../kern/subr_syscal= l.c:135 > #19 syscall (frame=3D0x11f3eba8) at > /usr/local/BSDRP/TESTING/FreeBSD/src/sys/i386/i386/trap.c:1152 > #20 0xffc033a7 in ?? () > #21 0x11f3eba8 in ?? () > Backtrace stopped: Cannot access memory at address 0xffbfecec > (kgdb) frame 12 > #12 0x0121c7ef in vnet_register_sysinit (arg=3D0x120182cc > <vnet_carpstats_init_vnet_init>) at > /usr/local/BSDRP/TESTING/FreeBSD/src/sys/net/vnet.c:500 > 500 vs->func(vs->arg); >=20 >=20 > Regards, >=20 > Olivier > _______________________________________________ > freebsd-current@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to > "freebsd-current-unsubscribe@freebsd.org"
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