drivers/staging/octeon/ethernet.c:158:45: sparse: sparse: invalid access past the end of 'ipd_ctl_status' (4 8)

From: kernel test robot
Date: Tue Aug 25 2020 - 14:14:19 EST

Hi Chris,

First bad commit (maybe != root cause):

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 6a9dc5fd6170d0a41c8a14eb19e63d94bea5705a
commit: 8ef0c4f06432b5b2f4e32f37b81708eae1e20c8c Revert "staging/octeon: Mark Ethernet driver as BROKEN"
date: 7 months ago
config: i386-randconfig-s002-20200826 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce:
# apt-get install sparse
# sparse version: v0.6.2-191-g10164920-dirty
git checkout 8ef0c4f06432b5b2f4e32f37b81708eae1e20c8c
# save the attached .config to linux build tree
make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>


sparse warnings: (new ones prefixed by >>)

>> drivers/staging/octeon/ethernet.c:158:45: sparse: sparse: invalid access past the end of 'ipd_ctl_status' (4 8)
drivers/staging/octeon/ethernet.c:157:45: sparse: sparse: invalid access past the end of 'ipd_ctl_status' (4 8)
drivers/staging/octeon/ethernet.c:271:48: sparse: sparse: invalid access past the end of 'frm_len_chk' (4 8)
drivers/staging/octeon/ethernet.c:270:48: sparse: sparse: invalid access past the end of 'frm_len_chk' (4 8)
drivers/staging/octeon/ethernet.c:321:46: sparse: sparse: invalid access past the end of 'control' (4 8)
drivers/staging/octeon/ethernet.c:318:46: sparse: sparse: invalid access past the end of 'control' (4 8)
drivers/staging/octeon/ethernet.c:308:42: sparse: sparse: invalid access past the end of 'control' (4 8)
drivers/staging/octeon/ethernet.c:311:42: sparse: sparse: invalid access past the end of 'control' (4 8)
drivers/staging/octeon/ethernet.c:303:34: sparse: sparse: invalid access past the end of 'control' (4 8)
drivers/staging/octeon/ethernet.c:487:33: sparse: sparse: invalid access past the end of 'link_info' (4 8)
drivers/staging/octeon/ethernet.c:471:24: sparse: sparse: invalid access past the end of 'gmx_cfg' (4 8)
drivers/staging/octeon/ethernet.c:510:24: sparse: sparse: invalid access past the end of 'link_info' (4 8)
drivers/staging/octeon/ethernet.c:753:59: sparse: sparse: invalid access past the end of 'pip_prt_tagx' (4 8)
drivers/staging/octeon/ethernet.c:752:59: sparse: sparse: invalid access past the end of 'pip_prt_tagx' (4 8)
drivers/staging/octeon/ethernet.c:750:67: sparse: sparse: invalid access past the end of 'pip_prt_tagx' (4 8)
drivers/staging/octeon/ethernet.c:749:67: sparse: sparse: invalid access past the end of 'pip_prt_tagx' (4 8)
drivers/staging/octeon/ethernet.c:748:67: sparse: sparse: invalid access past the end of 'pip_prt_tagx' (4 8)
drivers/staging/octeon/ethernet.c:747:67: sparse: sparse: invalid access past the end of 'pip_prt_tagx' (4 8)
drivers/staging/octeon/ethernet.c:746:67: sparse: sparse: invalid access past the end of 'pip_prt_tagx' (4 8)
drivers/staging/octeon/ethernet.c:745:67: sparse: sparse: invalid access past the end of 'pip_prt_tagx' (4 8)
drivers/staging/octeon/ethernet.c:744:67: sparse: sparse: invalid access past the end of 'pip_prt_tagx' (4 8)
drivers/staging/octeon/ethernet.c:743:67: sparse: sparse: invalid access past the end of 'pip_prt_tagx' (4 8)
drivers/staging/octeon/ethernet.c:742:67: sparse: sparse: invalid access past the end of 'pip_prt_tagx' (4 8)
drivers/staging/octeon/ethernet.c:741:67: sparse: sparse: invalid access past the end of 'pip_prt_tagx' (4 8)
drivers/staging/octeon/ethernet.c:740:67: sparse: sparse: invalid access past the end of 'pip_prt_tagx' (4 8)
drivers/staging/octeon/ethernet.c:739:67: sparse: sparse: invalid access past the end of 'pip_prt_tagx' (4 8)

# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8ef0c4f06432b5b2f4e32f37b81708eae1e20c8c
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 8ef0c4f06432b5b2f4e32f37b81708eae1e20c8c
vim +/ipd_ctl_status +158 drivers/staging/octeon/ethernet.c

422d97b8b05ed38 Chris Packham 2020-02-05 139
422d97b8b05ed38 Chris Packham 2020-02-05 140 static void cvm_oct_configure_common_hw(void)
422d97b8b05ed38 Chris Packham 2020-02-05 141 {
422d97b8b05ed38 Chris Packham 2020-02-05 142 /* Setup the FPA */
422d97b8b05ed38 Chris Packham 2020-02-05 143 cvmx_fpa_enable();
422d97b8b05ed38 Chris Packham 2020-02-05 144 cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
422d97b8b05ed38 Chris Packham 2020-02-05 145 num_packet_buffers);
422d97b8b05ed38 Chris Packham 2020-02-05 146 cvm_oct_mem_fill_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
422d97b8b05ed38 Chris Packham 2020-02-05 147 num_packet_buffers);
422d97b8b05ed38 Chris Packham 2020-02-05 148 if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
422d97b8b05ed38 Chris Packham 2020-02-05 149 cvm_oct_mem_fill_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
422d97b8b05ed38 Chris Packham 2020-02-05 150 CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 1024);
422d97b8b05ed38 Chris Packham 2020-02-05 151
422d97b8b05ed38 Chris Packham 2020-02-05 152 #ifdef __LITTLE_ENDIAN
422d97b8b05ed38 Chris Packham 2020-02-05 153 {
422d97b8b05ed38 Chris Packham 2020-02-05 154 union cvmx_ipd_ctl_status ipd_ctl_status;
422d97b8b05ed38 Chris Packham 2020-02-05 155
422d97b8b05ed38 Chris Packham 2020-02-05 156 ipd_ctl_status.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
422d97b8b05ed38 Chris Packham 2020-02-05 157 ipd_ctl_status.s.pkt_lend = 1;
422d97b8b05ed38 Chris Packham 2020-02-05 @158 ipd_ctl_status.s.wqe_lend = 1;
422d97b8b05ed38 Chris Packham 2020-02-05 159 cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_ctl_status.u64);
422d97b8b05ed38 Chris Packham 2020-02-05 160 }
422d97b8b05ed38 Chris Packham 2020-02-05 161 #endif
422d97b8b05ed38 Chris Packham 2020-02-05 162
422d97b8b05ed38 Chris Packham 2020-02-05 163 cvmx_helper_setup_red(num_packet_buffers / 4, num_packet_buffers / 8);
422d97b8b05ed38 Chris Packham 2020-02-05 164 }
422d97b8b05ed38 Chris Packham 2020-02-05 165

:::::: The code at line 158 was first introduced by commit
:::::: 422d97b8b05ed38cc5f67522ddb821868ea272a7 Revert "staging: octeon: delete driver"

:::::: TO: Chris Packham <chris.packham@xxxxxxxxxxxxxxxxxxx>
:::::: CC: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
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https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

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