Revision dec24b3b339487e58ce2da2875e9ee0316cc7e70 authored by Kees Cook on 20 June 2023, 19:42:38 UTC, committed by Paolo Abeni on 22 June 2023, 09:27:47 UTC
struct mux_adth actually ends with multiple struct mux_adth_dg members. This is seen both in the comments about the member: /** * struct mux_adth - Structure of the Aggregated Datagram Table Header. ... * @dg: datagramm table with variable length */ and in the preparation for populating it: adth_dg_size = offsetof(struct mux_adth, dg) + ul_adb->dg_count[i] * sizeof(*dg); ... adth_dg_size -= offsetof(struct mux_adth, dg); memcpy(&adth->dg, ul_adb->dg[i], adth_dg_size); This was reported as a run-time false positive warning: memcpy: detected field-spanning write (size 16) of single field "&adth->dg" at drivers/net/wwan/iosm/iosm_ipc_mux_codec.c:852 (size 8) Adjust the struct mux_adth definition and associated sizeof() math; no binary output differences are observed in the resulting object file. Reported-by: Florian Klink <flokli@flokli.de> Closes: https://lore.kernel.org/lkml/dbfa25f5-64c8-5574-4f5d-0151ba95d232@gmail.com/ Fixes: 1f52d7b62285 ("net: wwan: iosm: Enable M.2 7360 WWAN card support") Cc: M Chetan Kumar <m.chetan.kumar@intel.com> Cc: Bagas Sanjaya <bagasdotme@gmail.com> Cc: Intel Corporation <linuxwwan@intel.com> Cc: Loic Poulain <loic.poulain@linaro.org> Cc: Sergey Ryazanov <ryazanov.s.a@gmail.com> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: "David S. Miller" <davem@davemloft.net> Cc: Eric Dumazet <edumazet@google.com> Cc: Jakub Kicinski <kuba@kernel.org> Cc: Paolo Abeni <pabeni@redhat.com> Cc: "Gustavo A. R. Silva" <gustavoars@kernel.org> Cc: netdev@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org> Reviewed-by: Simon Horman <simon.horman@corigine.com> Link: https://lore.kernel.org/r/20230620194234.never.023-kees@kernel.org Signed-off-by: Paolo Abeni <pabeni@redhat.com>
1 parent 2174a08
blk-cgroup-rwstat.c
/* SPDX-License-Identifier: GPL-2.0
*
* Legacy blkg rwstat helpers enabled by CONFIG_BLK_CGROUP_RWSTAT.
* Do not use in new code.
*/
#include "blk-cgroup-rwstat.h"
int blkg_rwstat_init(struct blkg_rwstat *rwstat, gfp_t gfp)
{
int i, ret;
for (i = 0; i < BLKG_RWSTAT_NR; i++) {
ret = percpu_counter_init(&rwstat->cpu_cnt[i], 0, gfp);
if (ret) {
while (--i >= 0)
percpu_counter_destroy(&rwstat->cpu_cnt[i]);
return ret;
}
atomic64_set(&rwstat->aux_cnt[i], 0);
}
return 0;
}
EXPORT_SYMBOL_GPL(blkg_rwstat_init);
void blkg_rwstat_exit(struct blkg_rwstat *rwstat)
{
int i;
for (i = 0; i < BLKG_RWSTAT_NR; i++)
percpu_counter_destroy(&rwstat->cpu_cnt[i]);
}
EXPORT_SYMBOL_GPL(blkg_rwstat_exit);
/**
* __blkg_prfill_rwstat - prfill helper for a blkg_rwstat
* @sf: seq_file to print to
* @pd: policy private data of interest
* @rwstat: rwstat to print
*
* Print @rwstat to @sf for the device assocaited with @pd.
*/
u64 __blkg_prfill_rwstat(struct seq_file *sf, struct blkg_policy_data *pd,
const struct blkg_rwstat_sample *rwstat)
{
static const char *rwstr[] = {
[BLKG_RWSTAT_READ] = "Read",
[BLKG_RWSTAT_WRITE] = "Write",
[BLKG_RWSTAT_SYNC] = "Sync",
[BLKG_RWSTAT_ASYNC] = "Async",
[BLKG_RWSTAT_DISCARD] = "Discard",
};
const char *dname = blkg_dev_name(pd->blkg);
u64 v;
int i;
if (!dname)
return 0;
for (i = 0; i < BLKG_RWSTAT_NR; i++)
seq_printf(sf, "%s %s %llu\n", dname, rwstr[i],
rwstat->cnt[i]);
v = rwstat->cnt[BLKG_RWSTAT_READ] +
rwstat->cnt[BLKG_RWSTAT_WRITE] +
rwstat->cnt[BLKG_RWSTAT_DISCARD];
seq_printf(sf, "%s Total %llu\n", dname, v);
return v;
}
EXPORT_SYMBOL_GPL(__blkg_prfill_rwstat);
/**
* blkg_prfill_rwstat - prfill callback for blkg_rwstat
* @sf: seq_file to print to
* @pd: policy private data of interest
* @off: offset to the blkg_rwstat in @pd
*
* prfill callback for printing a blkg_rwstat.
*/
u64 blkg_prfill_rwstat(struct seq_file *sf, struct blkg_policy_data *pd,
int off)
{
struct blkg_rwstat_sample rwstat = { };
blkg_rwstat_read((void *)pd + off, &rwstat);
return __blkg_prfill_rwstat(sf, pd, &rwstat);
}
EXPORT_SYMBOL_GPL(blkg_prfill_rwstat);
/**
* blkg_rwstat_recursive_sum - collect hierarchical blkg_rwstat
* @blkg: blkg of interest
* @pol: blkcg_policy which contains the blkg_rwstat
* @off: offset to the blkg_rwstat in blkg_policy_data or @blkg
* @sum: blkg_rwstat_sample structure containing the results
*
* Collect the blkg_rwstat specified by @blkg, @pol and @off and all its
* online descendants and their aux counts. The caller must be holding the
* queue lock for online tests.
*
* If @pol is NULL, blkg_rwstat is at @off bytes into @blkg; otherwise, it
* is at @off bytes into @blkg's blkg_policy_data of the policy.
*/
void blkg_rwstat_recursive_sum(struct blkcg_gq *blkg, struct blkcg_policy *pol,
int off, struct blkg_rwstat_sample *sum)
{
struct blkcg_gq *pos_blkg;
struct cgroup_subsys_state *pos_css;
unsigned int i;
lockdep_assert_held(&blkg->q->queue_lock);
memset(sum, 0, sizeof(*sum));
rcu_read_lock();
blkg_for_each_descendant_pre(pos_blkg, pos_css, blkg) {
struct blkg_rwstat *rwstat;
if (!pos_blkg->online)
continue;
if (pol)
rwstat = (void *)blkg_to_pd(pos_blkg, pol) + off;
else
rwstat = (void *)pos_blkg + off;
for (i = 0; i < BLKG_RWSTAT_NR; i++)
sum->cnt[i] += blkg_rwstat_read_counter(rwstat, i);
}
rcu_read_unlock();
}
EXPORT_SYMBOL_GPL(blkg_rwstat_recursive_sum);
Computing file changes ...