Date: Sat, 17 Nov 2012 20:13:22 +0200 From: Ian FREISLICH <ianf@clue.co.za> To: Adrian Chadd <adrian@freebsd.org> Cc: freebsd-current@freebsd.org Subject: Re: netisr panic? Message-ID: <E1TZmtO-0000Xg-Cv@clue.co.za> In-Reply-To: <CAJ-Vmon_AJCcatduf7c70wpCvHYm=v8ytsUwfzBwf0u65r0FwA@mail.gmail.com> References: <CAJ-Vmon_AJCcatduf7c70wpCvHYm=v8ytsUwfzBwf0u65r0FwA@mail.gmail.com> <E1TZjzu-0000R1-HA@clue.co.za>
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Adrian Chadd wrote:
> It's a NULL ponter deref. This is my line 484 in if_ethersubr.c:
>
> eh = mtod(m, struct ether_header *);
>
>
> .. if that's yours, see if eh is NULL?
(kgdb) frame 7
#7 0xffffffff8050f534 in ether_nh_input (m=0xfffffe012521e700)
at /usr/src/sys/net/if_ethersubr.c:484
484 eh = mtod(m, struct ether_header *);
(kgdb) print eh
No symbol "eh" in current context.
(kgdb) print *m
$2 = {m_hdr = {mh_next = 0x100000000000000, mh_nextpkt = 0x10000000000,
mh_data = 0x0, mh_len = 60, mh_flags = 4259842, mh_type = 0,
pad = "\000\000\000\000\000"}, M_dat = {MH = {MH_pkthdr = {
rcvif = 0xfffffe000a1c2000, header = 0xffffffff, len = 60, flowid = 0,
csum_flags = 3840, csum_data = 65535, tso_segsz = 0, PH_vt = {
vt_vtag = 4, vt_nrecs = 4}, tags = {slh_first = 0x3c000000}},
MH_dat = {MH_ext = {
ext_buf = 0x69e5498600000000 <Address 0x69e5498600000000 out of bounds>, ext_free = 0x10602, ext_arg1 = 0xc000000070000, ext_arg2 = 0x100,
ext_size = 2048, ref_cnt = 0xfffffe0125236d8c, ext_type = 6},
MH_databuf = "\000\000\000\000\206Iåi\002\006\001\000\000\000\000\000\000\000\a\000\000\000\f\000\000\001\000\000\000\000\000\000\000\b\000\000\000\000\000\000\214m#%\001þÿÿ\006", '\0' <repeats 118 times>}},
M_databuf = "\000 \034\n\000þÿÿÿÿÿÿ\000\000\000\000<\000\000\000\000\000\000\000\000\017\000\000ÿÿ\000\000\000\000\004\000\000\000\000\000\000\000\000<\000\000\000\000\000\000\000\000\206Iåi\002\006\001\000\000\000\000\000\000\000\a\000\000\000\f\000\000\001\000\000\000\000\000\000\000\b\000\000\000\000\000\000\214m#%\001þÿÿ\006", '\0' <repeats 118 times>}}
Ian
--
Ian Freislich
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