On Thu, Apr 25, 2013 at 10:23:32PM +0300, Julian Anastasov wrote: > > Hello, > > On Thu, 25 Apr 2013, Hans Schillstrom wrote: > > > The reason for this patch is crash in kmemdup > > caused by returning from get_callid with uniialized > > matchoff and matchlen. > > > > Removing Zero check of matchlen since it's done by ct_sip_get_header() > > > > v2 return -EINVAL on Zero return from ct_sip_get_header() > > Thanks Julian. > > > > 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@xxxxxxxxxxxxxxx> > > Change looks good to me, > > Acked-by: Julian Anastasov <ja@xxxxxx> Thanks. > But who can add "ipvs: " prefix in the subject? I will add it. > > > --- > > net/netfilter/ipvs/ip_vs_pe_sip.c | 6 +----- > > 1 file changed, 1 insertion(+), 5 deletions(-) > > > > diff --git a/net/netfilter/ipvs/ip_vs_pe_sip.c b/net/netfilter/ipvs/ip_vs_pe_sip.c > > index 00cc024..f2c9d65 100644 > > --- a/net/netfilter/ipvs/ip_vs_pe_sip.c > > +++ b/net/netfilter/ipvs/ip_vs_pe_sip.c > > @@ -37,14 +37,10 @@ static int get_callid(const char *dptr, unsigned int dataoff, > > if (ret > 0) > > break; > > if (!ret) > > - return 0; > > + return -EINVAL; > > dataoff += *matchoff; > > } > > > > - /* Empty callid is useless */ > > - if (!*matchlen) > > - return -EINVAL; > > - > > /* Too large is useless */ > > if (*matchlen > IP_VS_PEDATA_MAXLEN) > > return -EINVAL; > > -- > > 1.7.11.7 > > Regards > > -- > Julian Anastasov <ja@xxxxxx> > -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
