Date: Wed, 4 Feb 2004 14:41:00 +0100 From: Frode Nordahl <frode@nordahl.net> To: Don Lewis <truckman@FreeBSD.org> Cc: freebsd-current@FreeBSD.org Subject: Re: rpc.lockd(8) seg faults on 5.2-RELEASE Message-ID: <C4DF668E-5717-11D8-B0FA-000A95A9A574@nordahl.net> In-Reply-To: <200402031106.i13B6A7E002768@gw.catspoiler.org> References: <200402031106.i13B6A7E002768@gw.catspoiler.org>
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On Feb 3, 2004, at 12:06, Don Lewis wrote:
>
> Probably not a NULL pointer because &ifl->filehandle will be the same
> value as (char *)ifl+offsetof(struct file_lock, filehandle), and
> LIST_FOREACH() will bail out when ifl is NULL. It would be interesting
> to walk the lock list starting at nfslocklist_head and following the
> nfslocklist links so see if any of the link values look bogus.
hum, on my last core dump, nfslocklist_head->lh_first->le_next and
le_prev are uninitialized pointers.
Other dumps have other results though, I'll look more into it tonight.
(using malloc.conf -> J)
(gdb) print *nfslocklist_head->lh_first
$3 = {nfslocklist = {le_next = 0xd0d0d0d0, le_prev = 0xd0d0d0d0},
filehandle = {fh_fsid = {val = {-791621424, -791621424}}, fh_fid = {
fid_len = 53456, fid_reserved = 53456,
fid_data = '?' <repeats 16 times>}}, addr = 0xd0d0d0d0, client = {
exclusive = -791621424, svid = 3503345872, oh = {n_len = 3503345872,
n_bytes = 0xd0d0d0d0 <Address 0xd0d0d0d0 out of bounds>},
l_offset = 15046755950319947984, l_len = 15046755950319947984},
client_cookie = {n_len = 3503345872,
n_bytes = 0xd0d0d0d0 <Address 0xd0d0d0d0 out of bounds>},
client_name = '?' <repeats 1024 times>, nsm_status = -791621424,
status = -791621424, flags = -791621424, blocking = -791621424,
locker = -791621424, fd = -791621424}
Mvh,
Frode
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