| Message ID | 1366817341-23837-1-git-send-email-hans@schillstrom.com |
|---|---|
| State | Awaiting Upstream |
| Headers | show |
Hello, On Wed, 24 Apr 2013, Hans Schillstrom wrote: > The reason for this patch is crash in kmemdup > caused by uninitialized param into kmemdup() > > BUG: unable to handle kernel paging request at ffff880457b5763f > IP: [<ffffffff810df7fc>] kmemdup+0x2e/0x35 > PGD 27f6067 PUD 0 > Oops: 0000 [#1] PREEMPT SMP > Modules linked in: xt_state xt_helper nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_mangle xt_connmark xt_conntrack ip6_tables nf_conntrack_ftp ip_vs_ftp nf_nat xt_tcpudp iptable_mangle xt_mark ip_tables x_tables ip_vs_rr ip_vs_lblcr ip_vs_pe_sip ip_vs nf_conntrack_sip nf_conntrack bonding igb i2c_algo_bit i2c_core > CPU 5 > Pid: 0, comm: swapper/5 Not tainted 3.9.0-rc5+ #5 /S1200KP > RIP: 0010:[<ffffffff810df7fc>] [<ffffffff810df7fc>] kmemdup+0x2e/0x35 > RSP: 0018:ffff8803fea03648 EFLAGS: 00010282 > RAX: ffff8803d61063e0 RBX: 0000000000000003 RCX: 0000000000000003 > RDX: 0000000000000003 RSI: ffff880457b5763f RDI: ffff8803d61063e0 > RBP: ffff8803fea03658 R08: 0000000000000008 R09: 0000000000000011 > R10: 0000000000000011 R11: 00ffffffff81a8a3 R12: ffff880457b5763f > R13: ffff8803d67f786a R14: ffff8803fea03730 R15: ffffffffa0098e90 > FS: 0000000000000000(0000) GS:ffff8803fea00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: ffff880457b5763f CR3: 0000000001a0c000 CR4: 00000000001407e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 > Process swapper/5 (pid: 0, threadinfo ffff8803ee18c000, task ffff8803ee18a480) > Stack: > ffff8803d822a080 000000000000001c ffff8803fea036c8 ffffffffa000937a > ffffffff81f0d8a0 000000038135fdd5 ffff880300000014 ffff880300110000 > ffffffff150118ac ffff8803d7e8a000 ffff88031e0118ac 0000000000000000 > Call Trace: > <IRQ> > > [<ffffffffa000937a>] ip_vs_sip_fill_param+0x13a/0x187 [ip_vs_pe_sip] > [<ffffffffa007b209>] ip_vs_sched_persist+0x2c6/0x9c3 [ip_vs] > [<ffffffff8107dc53>] ? __lock_acquire+0x677/0x1697 > [<ffffffff8100972e>] ? native_sched_clock+0x3c/0x7d > [<ffffffff8100972e>] ? native_sched_clock+0x3c/0x7d > [<ffffffff810649bc>] ? sched_clock_cpu+0x43/0xcf > [<ffffffffa007bb1e>] ip_vs_schedule+0x181/0x4ba [ip_vs] > ... > > Signed-off-by: Hans Schillstrom <hans@schillstrom.com> > --- > net/netfilter/ipvs/ip_vs_pe_sip.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/net/netfilter/ipvs/ip_vs_pe_sip.c b/net/netfilter/ipvs/ip_vs_pe_sip.c > index 00cc024..8767514 100644 > --- a/net/netfilter/ipvs/ip_vs_pe_sip.c > +++ b/net/netfilter/ipvs/ip_vs_pe_sip.c > @@ -70,7 +70,7 @@ ip_vs_sip_fill_param(struct ip_vs_conn_param *p, struct sk_buff *skb) > { > struct sk_buff *reasm = skb_nfct_reasm(skb); > struct ip_vs_iphdr iph; > - unsigned int dataoff, datalen, matchoff, matchlen; > + unsigned int dataoff, datalen, matchoff = 0, matchlen = 0; It seems in get_callid() when ct_sip_get_header() returns 0 (missing header) we should return -EINVAL just like for the "Empty callid is useless" case, i.e. messages with empty/missing Call-ID should be dropped. > const char *dptr; > int retc; > > -- > 1.7.11.7 Regards -- Julian Anastasov <ja@ssi.bg> -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hello On Wed, 2013-04-24 at 22:44 +0300, Julian Anastasov wrote: > Hello, [snip] > On Wed, 24 Apr 2013, Hans Schillstrom wrote: > > > The reason for this patch is crash in kmemdup > > caused by uninitialized param into kmemdup() > > > > diff --git a/net/netfilter/ipvs/ip_vs_pe_sip.c b/net/netfilter/ipvs/ip_vs_pe_sip.c > > index 00cc024..8767514 100644 > > --- a/net/netfilter/ipvs/ip_vs_pe_sip.c > > +++ b/net/netfilter/ipvs/ip_vs_pe_sip.c > > @@ -70,7 +70,7 @@ ip_vs_sip_fill_param(struct ip_vs_conn_param *p, struct sk_buff *skb) > > { > > struct sk_buff *reasm = skb_nfct_reasm(skb); > > struct ip_vs_iphdr iph; > > - unsigned int dataoff, datalen, matchoff, matchlen; > > + unsigned int dataoff, datalen, matchoff = 0, matchlen = 0; > > It seems in get_callid() when ct_sip_get_header() > returns 0 (missing header) we should return -EINVAL just > like for the "Empty callid is useless" case, i.e. messages > with empty/missing Call-ID should be dropped. > It seems to be the right cure for the patient, I'll send a new patch and I will also remove the unneeded check for zero matchlen since it is all ready done in ct_sip_get_header() - /* Empty callid is useless */ - if (!*matchlen) - return -EINVAL; - Thanks Hans > > const char *dptr; > > int retc; > > > > -- > > 1.7.11.7 > > Regards > > -- > Julian Anastasov <ja@ssi.bg> > -- > To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
Hello, On Thu, 25 Apr 2013, Hans Schillstrom wrote: > I'll send a new patch and I will also remove the unneeded check for zero > matchlen since it is all ready done in ct_sip_get_header() OK > - /* Empty callid is useless */ > - if (!*matchlen) > - return -EINVAL; > - > > Thanks > Hans Regards -- Julian Anastasov <ja@ssi.bg> -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/net/netfilter/ipvs/ip_vs_pe_sip.c b/net/netfilter/ipvs/ip_vs_pe_sip.c index 00cc024..8767514 100644 --- a/net/netfilter/ipvs/ip_vs_pe_sip.c +++ b/net/netfilter/ipvs/ip_vs_pe_sip.c @@ -70,7 +70,7 @@ ip_vs_sip_fill_param(struct ip_vs_conn_param *p, struct sk_buff *skb) { struct sk_buff *reasm = skb_nfct_reasm(skb); struct ip_vs_iphdr iph; - unsigned int dataoff, datalen, matchoff, matchlen; + unsigned int dataoff, datalen, matchoff = 0, matchlen = 0; const char *dptr; int retc;
The reason for this patch is crash in kmemdup caused by uninitialized param into kmemdup() BUG: unable to handle kernel paging request at ffff880457b5763f IP: [<ffffffff810df7fc>] kmemdup+0x2e/0x35 PGD 27f6067 PUD 0 Oops: 0000 [#1] PREEMPT SMP Modules linked in: xt_state xt_helper nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_mangle xt_connmark xt_conntrack ip6_tables nf_conntrack_ftp ip_vs_ftp nf_nat xt_tcpudp iptable_mangle xt_mark ip_tables x_tables ip_vs_rr ip_vs_lblcr ip_vs_pe_sip ip_vs nf_conntrack_sip nf_conntrack bonding igb i2c_algo_bit i2c_core CPU 5 Pid: 0, comm: swapper/5 Not tainted 3.9.0-rc5+ #5 /S1200KP RIP: 0010:[<ffffffff810df7fc>] [<ffffffff810df7fc>] kmemdup+0x2e/0x35 RSP: 0018:ffff8803fea03648 EFLAGS: 00010282 RAX: ffff8803d61063e0 RBX: 0000000000000003 RCX: 0000000000000003 RDX: 0000000000000003 RSI: ffff880457b5763f RDI: ffff8803d61063e0 RBP: ffff8803fea03658 R08: 0000000000000008 R09: 0000000000000011 R10: 0000000000000011 R11: 00ffffffff81a8a3 R12: ffff880457b5763f R13: ffff8803d67f786a R14: ffff8803fea03730 R15: ffffffffa0098e90 FS: 0000000000000000(0000) GS:ffff8803fea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff880457b5763f CR3: 0000000001a0c000 CR4: 00000000001407e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process swapper/5 (pid: 0, threadinfo ffff8803ee18c000, task ffff8803ee18a480) Stack: ffff8803d822a080 000000000000001c ffff8803fea036c8 ffffffffa000937a ffffffff81f0d8a0 000000038135fdd5 ffff880300000014 ffff880300110000 ffffffff150118ac ffff8803d7e8a000 ffff88031e0118ac 0000000000000000 Call Trace: <IRQ> [<ffffffffa000937a>] ip_vs_sip_fill_param+0x13a/0x187 [ip_vs_pe_sip] [<ffffffffa007b209>] ip_vs_sched_persist+0x2c6/0x9c3 [ip_vs] [<ffffffff8107dc53>] ? __lock_acquire+0x677/0x1697 [<ffffffff8100972e>] ? native_sched_clock+0x3c/0x7d [<ffffffff8100972e>] ? native_sched_clock+0x3c/0x7d [<ffffffff810649bc>] ? sched_clock_cpu+0x43/0xcf [<ffffffffa007bb1e>] ip_vs_schedule+0x181/0x4ba [ip_vs] ... Signed-off-by: Hans Schillstrom <hans@schillstrom.com> --- net/netfilter/ipvs/ip_vs_pe_sip.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)