Hi Phil, kernel test robot noticed the following build warnings: [auto build test WARNING on nf-next/master] url: https://github.com/intel-lab-lkp/linux/commits/Phil-Sutter/netfilter-xt_reent-Reduce-size-of-struct-recent_entry-nstamps/20240613-223955 base: https://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf-next.git master patch link: https://lore.kernel.org/r/20240613143254.26622-3-phil%40nwl.cc patch subject: [nf-next PATCH 2/2] netfilter: xt_recent: Largely lift restrictions on max hitcount value config: s390-defconfig (https://download.01.org/0day-ci/archive/20240618/202406180137.ATtQZimm-lkp@xxxxxxxxx/config) compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 78ee473784e5ef6f0b19ce4cb111fb6e4d23c6b2) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240618/202406180137.ATtQZimm-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202406180137.ATtQZimm-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from net/netfilter/xt_recent.c:14: In file included from include/linux/ip.h:16: In file included from include/linux/skbuff.h:17: In file included from include/linux/bvec.h:10: In file included from include/linux/highmem.h:9: In file included from include/linux/mm.h:1719: include/linux/vmstat.h:508:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 508 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 509 | item]; | ~~~~ include/linux/vmstat.h:515:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 515 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 516 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 522 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~ include/linux/vmstat.h:527:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 527 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 528 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ include/linux/vmstat.h:536:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 536 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 537 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ In file included from net/netfilter/xt_recent.c:14: In file included from include/linux/ip.h:16: In file included from include/linux/skbuff.h:31: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:464:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 464 | val = __raw_readb(PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:477:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 477 | val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu' 37 | #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x)) | ^ include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16' 102 | #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x)) | ^ In file included from net/netfilter/xt_recent.c:14: In file included from include/linux/ip.h:16: In file included from include/linux/skbuff.h:31: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 490 | val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu' 35 | #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) | ^ include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32' 115 | #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x)) | ^ In file included from net/netfilter/xt_recent.c:14: In file included from include/linux/ip.h:16: In file included from include/linux/skbuff.h:31: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 501 | __raw_writeb(value, PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:511:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 511 | __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 521 | __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:609:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 609 | readsb(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:617:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 617 | readsw(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:625:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 625 | readsl(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:634:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 634 | writesb(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:643:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 643 | writesw(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:652:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 652 | writesl(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ >> net/netfilter/xt_recent.c:738:38: warning: result of comparison of constant 4294967296 with expression of type 'unsigned int' is always false [-Wtautological-constant-out-of-range-compare] 738 | if (!ip_list_tot || ip_pkt_list_tot >= XT_RECENT_MAX_NSTAMPS) | ~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~ 18 warnings generated. vim +738 net/netfilter/xt_recent.c ^1da177e4c3f41 net/ipv4/netfilter/ipt_recent.c Linus Torvalds 2005-04-16 731 d3c5ee6d545b53 net/ipv4/netfilter/ipt_recent.c Jan Engelhardt 2007-12-04 732 static int __init recent_mt_init(void) ^1da177e4c3f41 net/ipv4/netfilter/ipt_recent.c Linus Torvalds 2005-04-16 733 { 404bdbfd242cb9 net/ipv4/netfilter/ipt_recent.c Patrick McHardy 2006-05-29 734 int err; ^1da177e4c3f41 net/ipv4/netfilter/ipt_recent.c Linus Torvalds 2005-04-16 735 abc86d0f99242b net/netfilter/xt_recent.c Florian Westphal 2014-11-24 736 BUILD_BUG_ON_NOT_POWER_OF_2(XT_RECENT_MAX_NSTAMPS); abc86d0f99242b net/netfilter/xt_recent.c Florian Westphal 2014-11-24 737 abc86d0f99242b net/netfilter/xt_recent.c Florian Westphal 2014-11-24 @738 if (!ip_list_tot || ip_pkt_list_tot >= XT_RECENT_MAX_NSTAMPS) 404bdbfd242cb9 net/ipv4/netfilter/ipt_recent.c Patrick McHardy 2006-05-29 739 return -EINVAL; 404bdbfd242cb9 net/ipv4/netfilter/ipt_recent.c Patrick McHardy 2006-05-29 740 ip_list_hash_size = 1 << fls(ip_list_tot); ^1da177e4c3f41 net/ipv4/netfilter/ipt_recent.c Linus Torvalds 2005-04-16 741 7d07d5632b672c net/netfilter/xt_recent.c Alexey Dobriyan 2010-01-18 742 err = register_pernet_subsys(&recent_net_ops); ^1da177e4c3f41 net/ipv4/netfilter/ipt_recent.c Linus Torvalds 2005-04-16 743 if (err) 404bdbfd242cb9 net/ipv4/netfilter/ipt_recent.c Patrick McHardy 2006-05-29 744 return err; 7d07d5632b672c net/netfilter/xt_recent.c Alexey Dobriyan 2010-01-18 745 err = xt_register_matches(recent_mt_reg, ARRAY_SIZE(recent_mt_reg)); 7d07d5632b672c net/netfilter/xt_recent.c Alexey Dobriyan 2010-01-18 746 if (err) 7d07d5632b672c net/netfilter/xt_recent.c Alexey Dobriyan 2010-01-18 747 unregister_pernet_subsys(&recent_net_ops); ^1da177e4c3f41 net/ipv4/netfilter/ipt_recent.c Linus Torvalds 2005-04-16 748 return err; ^1da177e4c3f41 net/ipv4/netfilter/ipt_recent.c Linus Torvalds 2005-04-16 749 } ^1da177e4c3f41 net/ipv4/netfilter/ipt_recent.c Linus Torvalds 2005-04-16 750 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
