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Date: Sun, 12 Jun 2022 19:04:23 +0800
From: kernel test robot <lkp@...el.com>
To: Felix Fietkau <nbd@....name>
Cc: kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: drivers/net/ethernet/mediatek/mtk_ppe.c:572:18: warning: array
subscript 'struct mtk_flow_entry[0]' is partly outside array bounds of
'unsigned char[24]'
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 7a68065eb9cd194cf03f135c9211eeb2d5c4c0a0
commit: 33fc42de33278b2b3ec6f3390512987bc29a62b7 net: ethernet: mtk_eth_soc: support creating mac address based offload entries
date: 10 weeks ago
config: mips-randconfig-r024-20220612 (https://download.01.org/0day-ci/archive/20220612/202206121811.nCGepk59-lkp@intel.com/config)
compiler: mipsel-linux-gcc (GCC) 11.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=33fc42de33278b2b3ec6f3390512987bc29a62b7
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 33fc42de33278b2b3ec6f3390512987bc29a62b7
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash drivers/net/
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
{standard input}: Assembler messages:
{standard input}:25: Error: found '(', expected: ')'
{standard input}:25: Error: found '(', expected: ')'
{standard input}:25: Error: non-constant expression in ".if" statement
{standard input}:25: Error: junk at end of line, first unrecognized character is `('
{standard input}:49: Error: found '(', expected: ')'
{standard input}:49: Error: found '(', expected: ')'
{standard input}:49: Error: non-constant expression in ".if" statement
{standard input}:49: Error: junk at end of line, first unrecognized character is `('
{standard input}:73: Error: found '(', expected: ')'
{standard input}:73: Error: found '(', expected: ')'
{standard input}:73: Error: non-constant expression in ".if" statement
{standard input}:73: Error: junk at end of line, first unrecognized character is `('
drivers/net/ethernet/mediatek/mtk_ppe.c: In function 'mtk_foe_entry_commit_subflow':
>> drivers/net/ethernet/mediatek/mtk_ppe.c:572:18: warning: array subscript 'struct mtk_flow_entry[0]' is partly outside array bounds of 'unsigned char[24]' [-Warray-bounds]
572 | flow_info->l2_data.base_flow = entry;
| ^~
drivers/net/ethernet/mediatek/mtk_ppe.c:567:21: note: referencing an object of size 24 allocated by 'kzalloc.constprop'
567 | flow_info = kzalloc(offsetof(struct mtk_flow_entry, l2_data.end),
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
568 | GFP_ATOMIC);
| ~~~~~~~~~~~
drivers/net/ethernet/mediatek/mtk_ppe.c:573:18: warning: array subscript 'struct mtk_flow_entry[0]' is partly outside array bounds of 'unsigned char[24]' [-Warray-bounds]
573 | flow_info->type = MTK_FLOW_TYPE_L2_SUBFLOW;
| ^~
drivers/net/ethernet/mediatek/mtk_ppe.c:567:21: note: referencing an object of size 24 allocated by 'kzalloc.constprop'
567 | flow_info = kzalloc(offsetof(struct mtk_flow_entry, l2_data.end),
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
568 | GFP_ATOMIC);
| ~~~~~~~~~~~
drivers/net/ethernet/mediatek/mtk_ppe.c:574:18: warning: array subscript 'struct mtk_flow_entry[0]' is partly outside array bounds of 'unsigned char[24]' [-Warray-bounds]
574 | flow_info->hash = hash;
| ^~
drivers/net/ethernet/mediatek/mtk_ppe.c:567:21: note: referencing an object of size 24 allocated by 'kzalloc.constprop'
567 | flow_info = kzalloc(offsetof(struct mtk_flow_entry, l2_data.end),
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
568 | GFP_ATOMIC);
| ~~~~~~~~~~~
{standard input}:2572: Error: found '(', expected: ')'
{standard input}:2572: Error: found '(', expected: ')'
{standard input}:2572: Error: non-constant expression in ".if" statement
{standard input}:2572: Error: junk at end of line, first unrecognized character is `('
{standard input}:5006: Error: found '(', expected: ')'
{standard input}:5006: Error: found '(', expected: ')'
{standard input}:5006: Error: non-constant expression in ".if" statement
{standard input}:5006: Error: junk at end of line, first unrecognized character is `('
{standard input}:5567: Error: found '(', expected: ')'
{standard input}:5567: Error: found '(', expected: ')'
{standard input}:5567: Error: non-constant expression in ".if" statement
{standard input}:5567: Error: junk at end of line, first unrecognized character is `('
{standard input}:7090: Error: found '(', expected: ')'
{standard input}:7090: Error: found '(', expected: ')'
{standard input}:7090: Error: non-constant expression in ".if" statement
{standard input}:7090: Error: junk at end of line, first unrecognized character is `('
vim +572 drivers/net/ethernet/mediatek/mtk_ppe.c
556
557 static void
558 mtk_foe_entry_commit_subflow(struct mtk_ppe *ppe, struct mtk_flow_entry *entry,
559 u16 hash)
560 {
561 struct mtk_flow_entry *flow_info;
562 struct mtk_foe_entry foe, *hwe;
563 struct mtk_foe_mac_info *l2;
564 u32 ib1_mask = MTK_FOE_IB1_PACKET_TYPE | MTK_FOE_IB1_UDP;
565 int type;
566
567 flow_info = kzalloc(offsetof(struct mtk_flow_entry, l2_data.end),
568 GFP_ATOMIC);
569 if (!flow_info)
570 return;
571
> 572 flow_info->l2_data.base_flow = entry;
573 flow_info->type = MTK_FLOW_TYPE_L2_SUBFLOW;
574 flow_info->hash = hash;
575 hlist_add_head(&flow_info->list, &ppe->foe_flow[hash / 2]);
576 hlist_add_head(&flow_info->l2_data.list, &entry->l2_flows);
577
578 hwe = &ppe->foe_table[hash];
579 memcpy(&foe, hwe, sizeof(foe));
580 foe.ib1 &= ib1_mask;
581 foe.ib1 |= entry->data.ib1 & ~ib1_mask;
582
583 l2 = mtk_foe_entry_l2(&foe);
584 memcpy(l2, &entry->data.bridge.l2, sizeof(*l2));
585
586 type = FIELD_GET(MTK_FOE_IB1_PACKET_TYPE, foe.ib1);
587 if (type == MTK_PPE_PKT_TYPE_IPV4_HNAPT)
588 memcpy(&foe.ipv4.new, &foe.ipv4.orig, sizeof(foe.ipv4.new));
589 else if (type >= MTK_PPE_PKT_TYPE_IPV6_ROUTE_3T && l2->etype == ETH_P_IP)
590 l2->etype = ETH_P_IPV6;
591
592 *mtk_foe_entry_ib2(&foe) = entry->data.bridge.ib2;
593
594 __mtk_foe_entry_commit(ppe, &foe, hash);
595 }
596
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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