/* * netsniff-ng - the packet sniffing beast * Copyright (C) 2009, 2010 Daniel Borkmann * Copyright (C) 2012 Christoph Jaeger * Subject to the GPL, version 2. */ #include #include #include /* for ntohs() */ #include /* for inet_ntop() */ #include "proto.h" #include "csum.h" #include "dissector_eth.h" #include "ipv4.h" #include "geoip.h" #include "pkt_buff.h" #include "built_in.h" #define FRAG_OFF_RESERVED_FLAG(x) ((x) & 0x8000) #define FRAG_OFF_NO_FRAGMENT_FLAG(x) ((x) & 0x4000) #define FRAG_OFF_MORE_FRAGMENT_FLAG(x) ((x) & 0x2000) #define FRAG_OFF_FRAGMENT_OFFSET(x) ((x) & 0x1fff) /* IP Option Numbers (http://www.iana.org/assignments/ip-parameters) */ #define IP_OPT_EOOL 0x00 #define IP_OPT_NOP 0x01 #define IP_OPT_COPIED_FLAG(x) ((x) & 0x80) #define IP_OPT_CLASS(x) (((x) & 0x60) >> 5) #define IP_OPT_NUMBER(x) ((x) & 0x1F) static void ipv4(struct pkt_buff *pkt) { uint16_t csum, frag_off, h_tot_len; char src_ip[INET_ADDRSTRLEN]; char dst_ip[INET_ADDRSTRLEN]; struct ipv4hdr *ip = (struct ipv4hdr *) pkt_pull(pkt, sizeof(*ip)); uint8_t *opt, *trailer; unsigned int trailer_len = 0; ssize_t opts_len, opt_len; struct sockaddr_in sas, sad; const char *city, *region, *country; if (!ip) return; frag_off = ntohs(ip->h_frag_off); h_tot_len = ntohs(ip->h_tot_len); csum = calc_csum(ip, ip->h_ihl * 4, 0); inet_ntop(AF_INET, &ip->h_saddr, src_ip, sizeof(src_ip)); inet_ntop(AF_INET, &ip->h_daddr, dst_ip, sizeof(dst_ip)); if ((pkt_len(pkt) + sizeof(*ip)) > h_tot_len) { trailer_len = pkt_len(pkt) + sizeof(*ip) - h_tot_len; trailer = pkt->data + h_tot_len + trailer_len; } if (trailer_len) { tprintf(" [ Eth trailer "); while (trailer_len--) { tprintf("%x", *(trailer - trailer_len)); } tprintf(" ]\n"); } tprintf(" [ IPv4 "); tprintf("Addr (%s => %s), ", src_ip, dst_ip); tprintf("Proto (%u), ", ip->h_protocol); tprintf("TTL (%u), ", ip->h_ttl); tprintf("TOS (%u), ", ip->h_tos); tprintf("Ver (%u), ", ip->h_version); tprintf("IHL (%u), ", ip->h_ihl); tprintf("Tlen (%u), ", ntohs(ip->h_tot_len)); tprintf("ID (%u), ", ntohs(ip->h_id)); tprintf("Res (%u), NoFrag (%u), MoreFrag (%u), FragOff (%u), ", FRAG_OFF_RESERVED_FLAG(frag_off) ? 1 : 0, FRAG_OFF_NO_FRAGMENT_FLAG(frag_off) ? 1 : 0, FRAG_OFF_MORE_FRAGMENT_FLAG(frag_off) ? 1 : 0, FRAG_OFF_FRAGMENT_OFFSET(frag_off)); tprintf("CSum (0x%.4x) is %s", ntohs(ip->h_check), csum ? colorize_start_full(black, red) "bogus (!)" colorize_end() : "ok"); if (csum) tprintf("%s should be 0x%.4x%s", colorize_start_full(black, red), csum_expected(ip->h_check, csum), colorize_end()); tprintf(" ]\n"); memset(&sas, 0, sizeof(sas)); sas.sin_family = PF_INET; sas.sin_addr.s_addr = ip->h_saddr; memset(&sad, 0, sizeof(sad)); sad.sin_family = PF_INET; sad.sin_addr.s_addr = ip->h_daddr; if (geoip_working()) { tprintf("\t[ Geo ("); if ((country = geoip4_country_name(&sas))) { tprintf("%s", country); if ((region = geoip4_region_name(&sas))) tprintf(" / %s", region); if ((city = geoip4_city_name(&sas))) tprintf(" / %s", city); } else { tprintf("local"); } tprintf(" => "); if ((country = geoip4_country_name(&sad))) { tprintf("%s", country); if ((region = geoip4_region_name(&sad))) tprintf(" / %s", region); if ((city = geoip4_city_name(&sad))) tprintf(" / %s", city); } else { tprintf("local"); } tprintf(") ]\n"); } opts_len = max_t(uint8_t, ip->h_ihl, sizeof(*ip) / sizeof(uint32_t)) * sizeof(uint32_t) - sizeof(*ip); for (opt = pkt_pull(pkt, opts_len); opt && opts_len > 0; opt++) { tprintf(" [ Option Copied (%u), Class (%u), Number (%u)", IP_OPT_COPIED_FLAG(*opt) ? 1 : 0, IP_OPT_CLASS(*opt), IP_OPT_NUMBER(*opt)); switch (*opt) { case IP_OPT_EOOL: case IP_OPT_NOP: tprintf(" ]\n"); opts_len--; break; default: /* * Assuming that EOOL and NOP are the only single-byte * options, treat all other options as variable in * length with a minimum of 2. * * TODO: option length might be incorrect in malformed packets, * check and handle that */ opt_len = *(++opt); if (opt_len > opts_len) { tprintf(", Len (%zd, invalid) ]\n", opt_len); goto out; } else tprintf(", Len (%zd) ]\n", opt_len); opts_len -= opt_len; tprintf(" [ Data hex "); for (opt_len -= 2; opt_len > 0; opt_len--) tprintf(" %.2x", *(++opt)); tprintf(" ]\n"); break; } } out: /* cut off everything that is not part of IPv4 payload */ /* XXX there could still be an Ethernet trailer included or others */ pkt_trim(pkt, pkt_len(pkt) - min(pkt_len(pkt), (ntohs(ip->h_tot_len) - ip->h_ihl * sizeof(uint32_t)))); pkt_set_dissector(pkt, ð_lay3, ip->h_protocol); } static void ipv4_less(struct pkt_buff *pkt) { char src_ip[INET_ADDRSTRLEN]; char dst_ip[INET_ADDRSTRLEN]; struct ipv4hdr *ip = (struct ipv4hdr *) pkt_pull(pkt, sizeof(*ip)); if (!ip) return; inet_ntop(AF_INET, &ip->h_saddr, src_ip, sizeof(src_ip)); inet_ntop(AF_INET, &ip->h_daddr, dst_ip, sizeof(dst_ip)); tprintf(" %s/%s Len %u", src_ip, dst_ip, ntohs(ip->h_tot_len)); /* cut off IP options and everything that is not part of IPv4 payload */ pkt_pull(pkt, max_t(uint8_t, ip->h_ihl, sizeof(*ip) / sizeof(uint32_t)) * sizeof(uint32_t) - sizeof(*ip)); /* XXX there could still be an Ethernet trailer included or others */ #if 0 pkt_trim(pkt, pkt_len(pkt) - min(pkt_len(pkt), (ntohs(ip->h_tot_len) - ip->h_ihl * sizeof(uint32_t)))); #endif pkt_set_dissector(pkt, ð_lay3, ip->h_protocol); } struct protocol ipv4_ops = { .key = 0x0800, .print_full = ipv4, .print_less = ipv4_less, }; d69fc6963c16003f50d7e8d74b02d0a143'>030305d69fc6963c16003f50d7e8d74b02d0a143 (diff)
PCI/MSI: Don't apply affinity if there aren't enough vectors left
Bart reported a problem wіth an out of bounds access in the low-level IRQ affinity code, which we root caused to the qla2xxx driver assigning all its MSI-X vectors to the pre and post vectors, and not having any left for the actually spread IRQs. Fix this issue by not asking for affinity assignment when there are no vectors to assign left. Fixes: 402723ad5c62 ("PCI/MSI: Provide pci_alloc_irq_vectors_affinity()") Link: https://lkml.kernel.org/r/1485359225.3093.3.camel@sandisk.com Reported-by: Bart Van Assche <bart.vanassche@sandisk.com> Tested-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'include/uapi/video/uvesafb.h')