| Message ID | 1366941190-12135-2-git-send-email-horms@verge.net.au |
|---|---|
| State | Accepted |
| Headers | show |
Hello. On 26-04-2013 5:53, Simon Horman wrote: > From: Hans Schillstrom <hans@schillstrom.com> > The reason for this patch is crash in kmemdup > caused by returning from get_callid with uniialized s/uniialized/uninitialized/? > matchoff and matchlen. > Removing Zero check of matchlen since it's done by ct_sip_get_header() > 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> > Acked-by: Julian Anastasov <ja@ssi.bg> > Signed-off-by: Simon Horman <horms@verge.net.au> WBR, Sergei -- 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 12475ef..e5920fb 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;