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author | David S. Miller <davem@davemloft.net> | 2005-10-13 21:41:23 (GMT) |
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committer | David S. Miller <davem@davemloft.net> | 2005-10-13 21:41:23 (GMT) |
commit | c8923c6b852d3a97c1faad0566e38fca330375a7 (patch) | |
tree | eb79e97c5468bba641c7a34b83514876f4902cf2 /net/bridge/netfilter | |
parent | c931488cc4619eecfe68a2f046b5898fddc2f904 (diff) | |
download | linux-c8923c6b852d3a97c1faad0566e38fca330375a7.tar.xz |
[NETFILTER]: Fix OOPSes on machines with discontiguous cpu numbering.
Original patch by Harald Welte, with feedback from Herbert Xu
and testing by Sébastien Bernard.
EBTABLES, ARP tables, and IP/IP6 tables all assume that cpus
are numbered linearly. That is not necessarily true.
This patch fixes that up by calculating the largest possible
cpu number, and allocating enough per-cpu structure space given
that.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bridge/netfilter')
-rw-r--r-- | net/bridge/netfilter/ebtables.c | 27 |
1 files changed, 17 insertions, 10 deletions
diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c index c454014..f8ffbf6 100644 --- a/net/bridge/netfilter/ebtables.c +++ b/net/bridge/netfilter/ebtables.c @@ -26,6 +26,7 @@ #include <linux/spinlock.h> #include <asm/uaccess.h> #include <linux/smp.h> +#include <linux/cpumask.h> #include <net/sock.h> /* needed for logical [in,out]-dev filtering */ #include "../br_private.h" @@ -823,10 +824,11 @@ static int translate_table(struct ebt_replace *repl, /* this will get free'd in do_replace()/ebt_register_table() if an error occurs */ newinfo->chainstack = (struct ebt_chainstack **) - vmalloc(num_possible_cpus() * sizeof(struct ebt_chainstack)); + vmalloc((highest_possible_processor_id()+1) + * sizeof(struct ebt_chainstack)); if (!newinfo->chainstack) return -ENOMEM; - for (i = 0; i < num_possible_cpus(); i++) { + for_each_cpu(i) { newinfo->chainstack[i] = vmalloc(udc_cnt * sizeof(struct ebt_chainstack)); if (!newinfo->chainstack[i]) { @@ -895,9 +897,12 @@ static void get_counters(struct ebt_counter *oldcounters, /* counters of cpu 0 */ memcpy(counters, oldcounters, - sizeof(struct ebt_counter) * nentries); + sizeof(struct ebt_counter) * nentries); + /* add other counters to those of cpu 0 */ - for (cpu = 1; cpu < num_possible_cpus(); cpu++) { + for_each_cpu(cpu) { + if (cpu == 0) + continue; counter_base = COUNTER_BASE(oldcounters, nentries, cpu); for (i = 0; i < nentries; i++) { counters[i].pcnt += counter_base[i].pcnt; @@ -929,7 +934,8 @@ static int do_replace(void __user *user, unsigned int len) BUGPRINT("Entries_size never zero\n"); return -EINVAL; } - countersize = COUNTER_OFFSET(tmp.nentries) * num_possible_cpus(); + countersize = COUNTER_OFFSET(tmp.nentries) * + (highest_possible_processor_id()+1); newinfo = (struct ebt_table_info *) vmalloc(sizeof(struct ebt_table_info) + countersize); if (!newinfo) @@ -1022,7 +1028,7 @@ static int do_replace(void __user *user, unsigned int len) vfree(table->entries); if (table->chainstack) { - for (i = 0; i < num_possible_cpus(); i++) + for_each_cpu(i) vfree(table->chainstack[i]); vfree(table->chainstack); } @@ -1040,7 +1046,7 @@ free_counterstmp: vfree(counterstmp); /* can be initialized in translate_table() */ if (newinfo->chainstack) { - for (i = 0; i < num_possible_cpus(); i++) + for_each_cpu(i) vfree(newinfo->chainstack[i]); vfree(newinfo->chainstack); } @@ -1132,7 +1138,8 @@ int ebt_register_table(struct ebt_table *table) return -EINVAL; } - countersize = COUNTER_OFFSET(table->table->nentries) * num_possible_cpus(); + countersize = COUNTER_OFFSET(table->table->nentries) * + (highest_possible_processor_id()+1); newinfo = (struct ebt_table_info *) vmalloc(sizeof(struct ebt_table_info) + countersize); ret = -ENOMEM; @@ -1186,7 +1193,7 @@ free_unlock: up(&ebt_mutex); free_chainstack: if (newinfo->chainstack) { - for (i = 0; i < num_possible_cpus(); i++) + for_each_cpu(i) vfree(newinfo->chainstack[i]); vfree(newinfo->chainstack); } @@ -1209,7 +1216,7 @@ void ebt_unregister_table(struct ebt_table *table) up(&ebt_mutex); vfree(table->private->entries); if (table->private->chainstack) { - for (i = 0; i < num_possible_cpus(); i++) + for_each_cpu(i) vfree(table->private->chainstack[i]); vfree(table->private->chainstack); } |