On Mon, 25 Feb 2008 10:44:08 -0800 (PST) [EMAIL PROTECTED] wrote: > http://bugzilla.kernel.org/show_bug.cgi?id=10097 > > Summary: SMP BUG in __nf_conntrack_find > Product: Networking > Version: 2.5 > KernelVersion: 2.6.25-rc3 > Platform: All > OS/Version: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: Netfilter/Iptables > AssignedTo: [EMAIL PROTECTED] > ReportedBy: [EMAIL PROTECTED] > > > Latest working kernel version: 2.6.24.2 > Earliest failing kernel version: 2.6.24-rc3 (not checked before) > Distribution: Bluewhite64 > Hardware Environment: Athlon X2 4200 > > Software Environment: > samba 3.0, 2.6.25-rc3 kernel + HR + tickless + kernel SMP debugging > > Problem Description: > The Samba smbd daemon triggers regularly the following BUG with 2.6.25-rc3: > > BUG: using smp_processor_id() in preemptible [00000000] code: nmbd/3167 > caller is __nf_conntrack_find+0x119/0x150 > Pid: 3167, comm: nmbd Not tainted 2.6.25-rc3 #1 > > Call Trace: > [<ffffffff8038f3f4>] debug_smp_processor_id+0xc4/0xd0 > [<ffffffff80555d79>] __nf_conntrack_find+0x119/0x150 > [<ffffffff80555dc9>] nf_conntrack_find_get+0x19/0x80 > [<ffffffff80556914>] nf_conntrack_in+0x1a4/0x5a0 > [<ffffffff8020bd33>] ? restore_args+0x0/0x30 > [<ffffffff8059d596>] ipv4_conntrack_local+0x66/0x70 > [<ffffffff80554362>] nf_iterate+0x62/0xa0 > [<ffffffff80567050>] ? dst_output+0x0/0x10 > [<ffffffff80554406>] nf_hook_slow+0x66/0xe0 > [<ffffffff80567050>] ? dst_output+0x0/0x10 > [<ffffffff80568825>] __ip_local_out+0xa5/0xb0 > [<ffffffff80568841>] ip_local_out+0x11/0x30 > [<ffffffff80568ac1>] ip_push_pending_frames+0x261/0x3e0 > [<ffffffff80587153>] udp_push_pending_frames+0x233/0x3d0 > [<ffffffff8058860f>] udp_sendmsg+0x30f/0x710 > [<ffffffff802328b0>] ? default_wake_function+0x0/0x10 > [<ffffffff8058f895>] inet_sendmsg+0x45/0x80 > [<ffffffff80531fcf>] sock_sendmsg+0xdf/0x110 > [<ffffffff80251270>] ? autoremove_wake_function+0x0/0x40 > [<ffffffff802374c7>] ? hrtick_resched+0x77/0x90 > [<ffffffff8025e2b5>] ? trace_hardirqs_on+0xd5/0x160 > [<ffffffff80531735>] ? sockfd_lookup_light+0x45/0x80 > [<ffffffff805323da>] sys_sendto+0xea/0x120 > [<ffffffff80626bcb>] ? _spin_unlock_irq+0x2b/0x60 > [<ffffffff8025e2b5>] ? trace_hardirqs_on+0xd5/0x160 > [<ffffffff80626bd6>] ? _spin_unlock_irq+0x36/0x60 > [<ffffffff8020b6db>] system_call_after_swapgs+0x7b/0x80 > > Steps to reproduce: > Start smbd with the forementionned kernel instrumented for SMP and kernel > debugging and hr + tickless enabled. >
Presumably this is in NF_CT_STAT_INC(). I wonder what caused it to start happening. Guys, this probably means that the developers who tested this change aren't enabling the debug options which all kernel developers _should_ be enabling when "testing" their code! Documentation/SubmitChecklist has a handy list. Should NF_CT_STAT_INC() be using local_inc()? -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
