/* * netsniff-ng - the packet sniffing beast * Copyright 2009, 2010 Daniel Borkmann. * Subject to the GPL, version 2. */ #include #include "hash.h" #include "oui.h" #include "str.h" #include "protos.h" #include "pkt_buff.h" #include "dissector.h" #include "dissector_eth.h" #include "xmalloc.h" struct hash_table eth_lay2; struct hash_table eth_lay3; static struct hash_table eth_ether_types; static struct hash_table eth_ports_udp; static struct hash_table eth_ports_tcp; struct port { unsigned int id; char *port; struct port *next; }; #define __do_lookup_inline(id, struct_name, hash_ptr, struct_member) \ ({ \ struct struct_name *entry = lookup_hash(id, hash_ptr); \ \ while (entry && id != entry->id) \ entry = entry->next; \ \ (entry && id == entry->id ? entry->struct_member : 0); \ }) char *lookup_port_udp(unsigned int id) { return __do_lookup_inline(id, port, ð_ports_udp, port); } char *lookup_port_tcp(unsigned int id) { return __do_lookup_inline(id, port, ð_ports_tcp, port); } char *lookup_ether_type(unsigned int id) { return __do_lookup_inline(id, port, ð_ether_types, port); } #ifdef __WITH_PROTOS static inline void dissector_init_entry(int type) { dissector_set_print_type(ðernet_ops, type); } static inline void dissector_init_exit(int type) { dissector_set_print_type(&none_ops, type); } static void dissector_init_layer_2(int type) { init_hash(ð_lay2); INSERT_HASH_PROTOS(arp_ops, eth_lay2); INSERT_HASH_PROTOS(lldp_ops, eth_lay2); INSERT_HASH_PROTOS(vlan_ops, eth_lay2); INSERT_HASH_PROTOS(ipv4_ops, eth_lay2); INSERT_HASH_PROTOS(ipv6_ops, eth_lay2); INSERT_HASH_PROTOS(QinQ_ops, eth_lay2); INSERT_HASH_PROTOS(mpls_uc_ops, eth_lay2); for_each_hash_int(ð_lay2, dissector_set_print_type, type); } static void dissector_init_layer_3(int type) { init_hash(ð_lay3); INSERT_HASH_PROTOS(icmpv4_ops, eth_lay3); INSERT_HASH_PROTOS(icmpv6_ops, eth_lay3); INSERT_HASH_PROTOS(igmp_ops, eth_lay3); INSERT_HASH_PROTOS(ip_auth_ops, eth_lay3); INSERT_HASH_PROTOS(ip_esp_ops, eth_lay3); INSERT_HASH_PROTOS(ipv6_dest_opts_ops, eth_lay3); INSERT_HASH_PROTOS(ipv6_fragm_ops, eth_lay3); INSERT_HASH_PROTOS(ipv6_hop_by_hop_ops, eth_lay3); INSERT_HASH_PROTOS(ipv6_in_ipv4_ops, eth_lay3); INSERT_HASH_PROTOS(ipv6_mobility_ops, eth_lay3); INSERT_HASH_PROTOS(ipv6_no_next_header_ops, eth_lay3); INSERT_HASH_PROTOS(ipv6_routing_ops, eth_lay3); INSERT_HASH_PROTOS(tcp_ops, eth_lay3); INSERT_HASH_PROTOS(udp_ops, eth_lay3); for_each_hash_int(ð_lay3, dissector_set_print_type, type); } #else static inline void dissector_init_entry(int type) {} static inline void dissector_init_exit(int type) {} static void dissector_init_layer_2(int type) {} static void dissector_init_layer_3(int type) {} #endif /* __WITH_PROTOS */ enum ports { PORTS_UDP, PORTS_TCP, PORTS_ETHER, }; static void dissector_init_ports(enum ports which) { FILE *fp; char buff[128], *ptr, *file; struct hash_table *table; struct port *p; void **pos; switch (which) { case PORTS_UDP: file = PREFIX_STRING "/etc/netsniff-ng/udp.conf"; table = ð_ports_udp; break; case PORTS_TCP: file = PREFIX_STRING "/etc/netsniff-ng/tcp.conf"; table = ð_ports_tcp; break; case PORTS_ETHER: file = PREFIX_STRING "/etc/netsniff-ng/ether.conf"; table = ð_ether_types; break; default: bug(); } fp = fopen(file, "r"); if (!fp) panic("No %s found!\n", file); memset(buff, 0, sizeof(buff)); while (fgets(buff, sizeof(buff), fp) != NULL) { buff[sizeof(buff) - 1] = 0; ptr = buff; p = xmalloc(sizeof(*p)); p->id = strtol(ptr, &ptr, 0); if ((ptr = strstr(buff, ", "))) ptr += strlen(", "); ptr = strtrim_right(ptr, '\n'); ptr = strtrim_right(ptr, ' '); p->port = xstrdup(ptr); p->next = NULL; pos = insert_hash(p->id, p, table); if (pos) { p->next = *pos; *pos = p; } memset(buff, 0, sizeof(buff)); } fclose(fp); } static int dissector_cleanup_ports(void *ptr) { struct port *tmp, *p = ptr; if (!ptr) return 0; while ((tmp = p->next)) { xfree(p->port); xfree(p); p = tmp; } xfree(p->port); xfree(p); return 0; } void dissector_init_ethernet(int fnttype) { dissector_init_entry(fnttype); dissector_init_layer_2(fnttype); dissector_init_layer_3(fnttype); dissector_init_exit(fnttype); #ifdef __WITH_PROTOS dissector_init_oui(); #endif dissector_init_ports(PORTS_UDP); dissector_init_ports(PORTS_TCP); dissector_init_ports(PORTS_ETHER); } void dissector_cleanup_ethernet(void) { free_hash(ð_lay2); free_hash(ð_lay3); for_each_hash(ð_ether_types, dissector_cleanup_ports); for_each_hash(ð_ports_udp, dissector_cleanup_ports); for_each_hash(ð_ports_tcp, dissector_cleanup_ports); free_hash(ð_ether_types); free_hash(ð_ports_udp); free_hash(ð_ports_tcp); #ifdef __WITH_PROTOS dissector_cleanup_oui(); #endif } t' onchange='this.form.submit();'>
authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2017-02-03 17:10:28 +1100
committerMichael Ellerman <mpe@ellerman.id.au>2017-02-08 23:36:29 +1100
commitd7df2443cd5f67fc6ee7c05a88e4996e8177f91b (patch)
tree098a7c0ca4fceb8a65cb1f693c9d71990388933d /include/dt-bindings/sound/fsl-imx-audmux.h
parenta0615a16f7d0ceb5804d295203c302d496d8ee91 (diff)
powerpc/mm: Fix spurrious segfaults on radix with autonuma
When autonuma (Automatic NUMA balancing) marks a PTE inaccessible it clears all the protection bits but leave the PTE valid. With the Radix MMU, an attempt at executing from such a PTE will take a fault with bit 35 of SRR1 set "SRR1_ISI_N_OR_G". It is thus incorrect to treat all such faults as errors. We should pass them to handle_mm_fault() for autonuma to deal with. The case of pages that are really not executable is handled by the existing test for VM_EXEC further down. That leaves us with catching the kernel attempts at executing user pages. We can catch that earlier, even before we do find_vma. It is never valid on powerpc for the kernel to take an exec fault to begin with. So fold that test with the existing test for the kernel faulting on kernel addresses to bail out early. Fixes: 1d18ad026844 ("powerpc/mm: Detect instruction fetch denied and report") Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'include/dt-bindings/sound/fsl-imx-audmux.h')