diff options
| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2016-04-29 10:39:34 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2016-04-29 11:02:33 +0200 |
| commit | 92b4423e3a0bc5d43ecde4bcad871f8b5ba04efd (patch) | |
| tree | fc6db0429c46bab284871df7ef97df9730e7c9b3 /include/linux/netfilter/x_tables.h | |
| parent | 6cd54fc60cc9d307c09bd2675f410c1086050e7d (diff) | |
| download | linux-92b4423e3a0bc5d43ecde4bcad871f8b5ba04efd.tar.gz | |
netfilter: fix IS_ERR_VALUE usage
This is a forward-port of the original patch from Andrzej Hajda,
he said:
"IS_ERR_VALUE should be used only with unsigned long type.
Otherwise it can work incorrectly. To achieve this function
xt_percpu_counter_alloc is modified to return unsigned long,
and its result is assigned to temporary variable to perform
error checking, before assigning to .pcnt field.
The patch follows conclusion from discussion on LKML [1][2].
[1]: http://permalink.gmane.org/gmane.linux.kernel/2120927
[2]: http://permalink.gmane.org/gmane.linux.kernel/2150581"
Original patch from Andrzej is here:
http://patchwork.ozlabs.org/patch/582970/
This patch has clashed with input validation fixes for x_tables.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'include/linux/netfilter/x_tables.h')
| -rw-r--r-- | include/linux/netfilter/x_tables.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/include/linux/netfilter/x_tables.h b/include/linux/netfilter/x_tables.h index 4dd9306c9d5623..dc4f58a3cdcc7a 100644 --- a/include/linux/netfilter/x_tables.h +++ b/include/linux/netfilter/x_tables.h @@ -380,16 +380,16 @@ static inline unsigned long ifname_compare_aligned(const char *_a, * allows us to return 0 for single core systems without forcing * callers to deal with SMP vs. NONSMP issues. */ -static inline u64 xt_percpu_counter_alloc(void) +static inline unsigned long xt_percpu_counter_alloc(void) { if (nr_cpu_ids > 1) { void __percpu *res = __alloc_percpu(sizeof(struct xt_counters), sizeof(struct xt_counters)); if (res == NULL) - return (u64) -ENOMEM; + return -ENOMEM; - return (u64) (__force unsigned long) res; + return (__force unsigned long) res; } return 0; |