diff options
| author |   Jakub Kicinski <kuba@kernel.org> | 2022-05-18 17:43:05 -0700 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-05-20 17:04:51 -0700 |
| commit | fe5c5fc145edcf98a759b895f52b646730eeb7be (patch) | |
| tree | be5887e40ca1d42807d14762a0a7caf9ee6b6de5 /drivers/net/ethernet/stmicro | |
| parent | bonding: fix missed rcu protection (diff) | |
| download | linux-dev-fe5c5fc145edcf98a759b895f52b646730eeb7be.tar.xz linux-dev-fe5c5fc145edcf98a759b895f52b646730eeb7be.zip | |
net: stmmac: fix out-of-bounds access in a selftest
GCC 12 points out that struct tc_action is smaller than
struct tcf_action:
drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c: In function ‘stmmac_test_rxp’:
drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c:1132:21: warning: array subscript ‘struct tcf_gact[0]’ is partly outside array bounds of ‘unsigned char[272]’ [-Warray-bounds]
1132 | gact->tcf_action = TC_ACT_SHOT;
| ^~
Fixes: ccfc639a94f2 ("net: stmmac: selftests: Add a selftest for Flexible RX Parser")
Link: https://lore.kernel.org/r/20220519004305.2109708-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/ethernet/stmicro')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c index 9f1759593b94..2fc51dc5eb0b 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c @@ -1084,8 +1084,9 @@ static int stmmac_test_rxp(struct stmmac_priv *priv) unsigned char addr[ETH_ALEN] = {0xde, 0xad, 0xbe, 0xef, 0x00, 0x00}; struct tc_cls_u32_offload cls_u32 = { }; struct stmmac_packet_attrs attr = { }; - struct tc_action **actions, *act; + struct tc_action **actions; struct tc_u32_sel *sel; + struct tcf_gact *gact; struct tcf_exts *exts; int ret, i, nk = 1; @@ -1110,8 +1111,8 @@ static int stmmac_test_rxp(struct stmmac_priv *priv) goto cleanup_exts; } - act = kcalloc(nk, sizeof(*act), GFP_KERNEL); - if (!act) { + gact = kcalloc(nk, sizeof(*gact), GFP_KERNEL); + if (!gact) { ret = -ENOMEM; goto cleanup_actions; } @@ -1126,9 +1127,7 @@ static int stmmac_test_rxp(struct stmmac_priv *priv) exts->nr_actions = nk; exts->actions = actions; for (i = 0; i < nk; i++) { - struct tcf_gact *gact = to_gact(&act[i]); - - actions[i] = &act[i]; + actions[i] = (struct tc_action *)&gact[i]; gact->tcf_action = TC_ACT_SHOT; } @@ -1152,7 +1151,7 @@ static int stmmac_test_rxp(struct stmmac_priv *priv) stmmac_tc_setup_cls_u32(priv, priv, &cls_u32); cleanup_act: - kfree(act); + kfree(gact); cleanup_actions: kfree(actions); cleanup_exts: |