On Tue, 2015-06-09 at 17:04 -0700, Stephen Hemminger wrote: > > Begin forwarded message: > > Date: Mon, 8 Jun 2015 21:20:23 +0000 > From: "bugzilla-dae...@bugzilla.kernel.org" > <bugzilla-dae...@bugzilla.kernel.org> > To: "shemmin...@linux-foundation.org" <shemmin...@linux-foundation.org> > Subject: [Bug 99671] New: glibc deadlock in __check_pf() presumed due to > missing netlink response > > > https://bugzilla.kernel.org/show_bug.cgi?id=99671 > > Bug ID: 99671 > Summary: glibc deadlock in __check_pf() presumed due to missing > netlink response > Product: Networking > Version: 2.5 > Kernel Version: 4.0 > Hardware: All > OS: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: Other > Assignee: shemmin...@linux-foundation.org > Reporter: dw...@infradead.org > Regression: No > > I keep seeing multithreaded processes deadlocked on glibc's __check_pf > function, with the culprit stuck like this: > > #0 0x0000003841302edd in recvmsg () at ../sysdeps/unix/syscall-template.S:81 > #1 0x000000384131f8ee in __check_pf (pid=-52599, fd=20) at > ../sysdeps/unix/sysv/linux/check_pf.c:166 > #2 0x000000384131f8ee in __check_pf > (seen_ipv4=seen_ipv4@entry=0x7f5b137fdc32, > seen_ipv6=seen_ipv6@entry=0x7f5b137fdc33, in6ai=in6ai@entry=0x7f5b137fdc40, > in6ailen=in6ailen@entry=0x7f5b137fdc48) at > ../sysdeps/unix/sysv/linux/check_pf.c:324 > > I don't understand why the glibc code is waiting; even if netlink responses > are > dropped, it should get ENOBUFS and bail out. > > This started happening to me, sporadically, when I updated my Fedora 22 beta > installation to the 4.0 kernel. It seemed to go away when I reverted to 3.19, > and came back again when I went back to 4.0. Filed in Red Hat bugzilla as > https://bugzilla.redhat.com/show_bug.cgi?id=1209433 and reported upstream at > https://www.marc.info/?l=linux-netdev&m=142849461211078&w=3 and > https://www.marc.info/?l=linux-netdev&m=142954024310299&w=3 > > Others seem to have seen it on earlier kernels though: > https://github.com/nahi/httpclient/issues/232
Probably fixed by : http://patchwork.ozlabs.org/patch/473041/ -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
