tree: https://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next.git skb-put-zero head: f18c9b85b5d68bb029dc1f8c82bae33632d6f485 commit: f18c9b85b5d68bb029dc1f8c82bae33632d6f485 [5/5] networking: make skb_push & __skb_push return void* config: m68k-sun3_defconfig (attached as .config) compiler: m68k-linux-gcc (GCC) 4.9.0 reproduce: wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout f18c9b85b5d68bb029dc1f8c82bae33632d6f485 # save the attached .config to linux build tree make.cross ARCH=m68k All error/warnings (new ones prefixed by >>): drivers/net/ppp/ppp_async.c: In function 'process_input_packet': >> drivers/net/ppp/ppp_async.c:805:19: warning: dereferencing 'void *' pointer skb_push(skb, 1)[0] = 0; ^ >> drivers/net/ppp/ppp_async.c:805:3: error: invalid use of void expression skb_push(skb, 1)[0] = 0; ^ -- drivers/net/ppp/ppp_synctty.c: In function 'ppp_sync_input': >> drivers/net/ppp/ppp_synctty.c:714:19: warning: dereferencing 'void *' pointer skb_push(skb, 1)[0] = 0; ^ >> drivers/net/ppp/ppp_synctty.c:714:3: error: invalid use of void expression skb_push(skb, 1)[0] = 0; ^ -- drivers/net/ppp/pptp.c: In function 'pptp_rcv_core': >> drivers/net/ppp/pptp.c:331:20: warning: dereferencing 'void *' pointer skb_push(skb, 1)[0] = 0; ^ >> drivers/net/ppp/pptp.c:331:4: error: invalid use of void expression skb_push(skb, 1)[0] = 0; ^ vim +805 drivers/net/ppp/ppp_async.c ^1da177e drivers/net/ppp_async.c Linus Torvalds 2005-04-16 789 fcs = PPP_FCS(fcs, *p++); ^1da177e drivers/net/ppp_async.c Linus Torvalds 2005-04-16 790 if (fcs != PPP_GOODFCS) ^1da177e drivers/net/ppp_async.c Linus Torvalds 2005-04-16 791 goto err; /* bad FCS */ ^1da177e drivers/net/ppp_async.c Linus Torvalds 2005-04-16 792 skb_trim(skb, skb->len - 2); ^1da177e drivers/net/ppp_async.c Linus Torvalds 2005-04-16 793 ^1da177e drivers/net/ppp_async.c Linus Torvalds 2005-04-16 794 /* check for address/control and protocol compression */ ^1da177e drivers/net/ppp_async.c Linus Torvalds 2005-04-16 795 p = skb->data; 7c5050e3 drivers/net/ppp_async.c Paul Mackerras 2007-04-19 796 if (p[0] == PPP_ALLSTATIONS) { ^1da177e drivers/net/ppp_async.c Linus Torvalds 2005-04-16 797 /* chop off address/control */ 7c5050e3 drivers/net/ppp_async.c Paul Mackerras 2007-04-19 798 if (p[1] != PPP_UI || skb->len < 3) ^1da177e drivers/net/ppp_async.c Linus Torvalds 2005-04-16 799 goto err; ^1da177e drivers/net/ppp_async.c Linus Torvalds 2005-04-16 800 p = skb_pull(skb, 2); ^1da177e drivers/net/ppp_async.c Linus Torvalds 2005-04-16 801 } ^1da177e drivers/net/ppp_async.c Linus Torvalds 2005-04-16 802 proto = p[0]; ^1da177e drivers/net/ppp_async.c Linus Torvalds 2005-04-16 803 if (proto & 1) { ^1da177e drivers/net/ppp_async.c Linus Torvalds 2005-04-16 804 /* protocol is compressed */ ^1da177e drivers/net/ppp_async.c Linus Torvalds 2005-04-16 @805 skb_push(skb, 1)[0] = 0; ^1da177e drivers/net/ppp_async.c Linus Torvalds 2005-04-16 806 } else { ^1da177e drivers/net/ppp_async.c Linus Torvalds 2005-04-16 807 if (skb->len < 2) ^1da177e drivers/net/ppp_async.c Linus Torvalds 2005-04-16 808 goto err; ^1da177e drivers/net/ppp_async.c Linus Torvalds 2005-04-16 809 proto = (proto << 8) + p[1]; ^1da177e drivers/net/ppp_async.c Linus Torvalds 2005-04-16 810 if (proto == PPP_LCP) ^1da177e drivers/net/ppp_async.c Linus Torvalds 2005-04-16 811 async_lcp_peek(ap, p, skb->len, 1); ^1da177e drivers/net/ppp_async.c Linus Torvalds 2005-04-16 812 } ^1da177e drivers/net/ppp_async.c Linus Torvalds 2005-04-16 813 :::::: The code at line 805 was first introduced by commit :::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2 :::::: TO: Linus Torvalds <torvalds@xxxxxxxxxxxxxxx> :::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
Attachment:
.config.gz
Description: application/gzip
