Re: Bug in ethernet module b44.c (2.6.7)

[Miroslav Zubcic]

Denis Vlasenko <vda@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> writes:

> Provide strace of hung nmap.

--------------------------------------
execve("/usr/bin/nmap", ["nmap", "-sS", "192.168.3.1"], [/* 45 vars */]) = 0

[...]

read(3, "Iface\tDestination\tGateway \tFlags"..., 1024) = 640
read(3, "", 1024)                       = 0
close(3)                                = 0
munmap(0x4017d000, 4096)                = 0
socket(PF_INET, SOCK_RAW, IPPROTO_RAW)  = 3
setsockopt(3, SOL_SOCKET, SO_BROADCAST, [1], 4) = 0
socket(PF_INET, SOCK_RAW, IPPROTO_RAW)  = 4
setsockopt(4, SOL_SOCKET, SO_BROADCAST, [1], 4) = 0
socket(PF_PACKET, SOCK_RAW, 768)        = 5
ioctl(5, 0x8933, 0xbfffa650)            = 0
ioctl(5, 0x8927, 0xbfffa650)            = 0
ioctl(5, 0x8933, 0xbfffa650)            = 0
bind(5, {sa_family=AF_PACKET, proto=0x03, if3, pkttype=PACKET_HOST, addr(0)={0, }, 20) = 0
setsockopt(5, SOL_PACKET, PACKET_ADD_MEMBERSHIP, "\3\0\0\0\2\0\0\0\0\0\0\0\0\0\0\0", 16) = 0
ioctl(5, 0x8921, 0xbfffa650)            = 0
socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 6
ioctl(6, 0x8915, 0xbfffa4c0)            = 0
ioctl(6, 0x891b, 0xbfffa4c0)            = 0
close(6)                                = 0
setsockopt(5, SOL_SOCKET, 0x1a /* SO_??? */, "r\0\0\0\210\35\r\10", 8) = 0
gettimeofday({1091471189, 938221}, NULL) = 0
setsockopt(4, SOL_IP, IP_HDRINCL, [1], 4) = 0
sendto(4, "E\0\0\34\317\6\0\0003\1\3651\0\0\0\0\300\250\3\1\10\0\376"..., 28, 0, {sa_family=AF_INET, sin_port=htons(0), sin_addr=inet_addr("192.168.3.1")}, 16) =
 28
gettimeofday({1091471189, 938342}, NULL) = 0
setsockopt(3, SOL_IP, IP_HDRINCL, [1], 4) = 0
sendto(3, "E\0\0(t\377\0\0001\6\215u\300\250\3\n\300\250\3\1\214\n"..., 40, 0, {sa_family=AF_INET, sin_port=htons(80), sin_addr=inet_addr("192.168.3.1")}, 16) = 
40
gettimeofday({1091471189, 938429}, NULL) = 0
gettimeofday({1091471189, 938446}, NULL) = 0
gettimeofday({1091471189, 938464}, NULL) = 0
gettimeofday({1091471189, 938483}, NULL) = 0
gettimeofday({1091471189, 938501}, NULL) = 0
select(6, [5], NULL, NULL, {0, 20000})  = 0 (Timeout)
gettimeofday({1091471189, 958183}, NULL) = 0
select(6, [5], NULL, NULL, {0, 20000})  = 0 (Timeout)
gettimeofday({1091471189, 978194}, NULL) = 0
select(6, [5], NULL, NULL, {0, 20000})  = 0 (Timeout)
gettimeofday({1091471189, 998175}, NULL) = 0
select(6, [5], NULL, NULL, {0, 20000})  = 0 (Timeout)
gettimeofday({1091471190, 18172}, NULL) = 0
select(6, [5], NULL, NULL, {0, 20000})  = 0 (Timeout)
gettimeofday({1091471190, 38168}, NULL) = 0

[...]

... and so on and on until interrupted on the console.

[...]

--- SIGINT (Interrupt) @ 0 (0) ---
write(2, "caught SIGINT signal, cleaning u"..., 34) = 34
munmap(0x40017000, 4096)                = 0
exit_group(1)       

--------------------------------------

> Does just setting promisc with ifconfig or ip tool helps?

Yes, 'ifconfig eth0 promisc' works as a workaround. Just like when I
do it indirectly with tcpdump(8).


-- 
Many men would sooner die then think. In fact they do.
		-- Bertrand Russell

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