Bug #948
closed
netstat patch
0%
Description
Hello,
There is a bug in netstat(1) that can cause it to spin out of control
and eat up all CPU. This has been reported in FreeBSD and NetBSD and
I've also seen reports of the same problem in Mac OS X, so it stands to
reason this might affect DragonFlyBSD as well.
John Baldwin fixed this in FreeBSD:
http://www.freebsd.org/cgi/cvsweb.cgi/src/usr.bin/netstat/route.c.diff?r1=1.87;r2=1.88
"Make netstat rn more resilient to having the routing table change out Try to do something intelligent if kvm_read() fails to read a routing
from
under it while running. Note that this is still not perfect:
table structure such as an rtentry, radix_node, or ifnet.
- Don't follow left and right node pointers in radix_nodes unless
RNF_ACTIVE is set in rn_flags. This avoids walking through freed
radix_nodes."
The NetBSD error report is at
http://www.netbsd.org/cgi-bin/query-pr-single.pl?number=36195
-Jan
Updated by gstanley almost 16 years ago
Does this bug effect you, or have you encountered this bug on Dfly?
Updated by jschauma almost 16 years ago
Gary Stanley <bugs@lists.dragonflybsd.org> wrote:
I don't use DragonFlyBSD, so it has not affected me. I just filed the
bug based on the assumption that all BSDs were affected. If you
conclude that Dfly is not affected, feel free to close this.
-Jan
Updated by marino over 11 years ago
- Description updated (diff)
- Assignee set to sepherosa
Sephe, I don't think this patch was ever incorporated. I looked in gitweb.
Is this still valid?
Updated by sepherosa over 11 years ago
On Thu, Nov 15, 2012 at 10:28 PM, John Marino via Redmine
<bugtracker-admin@leaf.dragonflybsd.org> wrote:
Issue #948 has been updated by John Marino.
Description updated
Assignee set to Sepherosa ZiehauSephe, I don't think this patch was ever incorporated. I looked in gitweb.
Is this still valid?
Patch committed:
0e23ab10e5db9a505c79ad0f5972c2740ddd3341
----------------------------------------
Bug #948: netstat patch
http://bugs.dragonflybsd.org/issues/948Author: Jan Schaumann
Status: New
Priority: Normal
Assignee: Sepherosa Ziehau
Category:
Target version:Hello,
There is a bug in netstat(1) that can cause it to spin out of control
and eat up all CPU. This has been reported in FreeBSD and NetBSD and
I've also seen reports of the same problem in Mac OS X, so it stands to
reason this might affect DragonFlyBSD as well.John Baldwin fixed this in FreeBSD:
http://www.freebsd.org/cgi/cvsweb.cgi/src/usr.bin/netstat/route.c.diff?r1=1.87;r2=1.88"Make netstat
rn more resilient to having the routing table change outTry to do something intelligent if kvm_read() fails to read a routing
from
under it while running. Note that this is still not perfect:
table structure such as an rtentry, radix_node, or ifnet.
- Don't follow left and right node pointers in radix_nodes unless
RNF_ACTIVE is set in rn_flags. This avoids walking through freed
radix_nodes."The NetBSD error report is at
http://www.netbsd.org/cgi-bin/query-pr-single.pl?number=36195-Jan
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