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Message-ID: <202110011006.Hsgqq6FH-lkp@intel.com>
Date: Fri, 1 Oct 2021 10:31:30 +0800
From: kernel test robot <lkp@...el.com>
To: Ralf Baechle <ralf@...ux-mips.org>, netdev@...r.kernel.org
Cc: llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
Jakub Kicinski <kuba@...nel.org>,
Christoph Hellwig <hch@....de>,
Thomas Osterried <thomas@...erried.de>,
linux-hams@...r.kernel.org
Subject: Re: [PATCH] ax25: Fix use of copy_from_sockptr() in ax25_setsockopt()
Hi Ralf,
I love your patch! Perhaps something to improve:
[auto build test WARNING on net/master]
[also build test WARNING on net-next/master horms-ipvs/master linus/master v5.15-rc3 next-20210922]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/0day-ci/linux/commits/Ralf-Baechle/ax25-Fix-use-of-copy_from_sockptr-in-ax25_setsockopt/20211001-002911
base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git 35306eb23814444bd4021f8a1c3047d3cb0c8b2b
config: x86_64-randconfig-r012-20210930 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 962e503cc8bc411f7523cc393acae8aae425b1c4)
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://github.com/0day-ci/linux/commit/a84e2204c4c268dd4475a95ed472285982ae6c57
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Ralf-Baechle/ax25-Fix-use-of-copy_from_sockptr-in-ax25_setsockopt/20211001-002911
git checkout a84e2204c4c268dd4475a95ed472285982ae6c57
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=x86_64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
>> net/ax25/af_ax25.c:569:22: warning: result of comparison of constant 18446744073709551 with expression of type 'unsigned int' is always false [-Wtautological-constant-out-of-range-compare]
if (opt < 1 || opt > ULONG_MAX / HZ) {
~~~ ^ ~~~~~~~~~~~~~~
net/ax25/af_ax25.c:578:22: warning: result of comparison of constant 18446744073709551 with expression of type 'unsigned int' is always false [-Wtautological-constant-out-of-range-compare]
if (opt < 1 || opt > ULONG_MAX / HZ) {
~~~ ^ ~~~~~~~~~~~~~~
net/ax25/af_ax25.c:594:22: warning: result of comparison of constant 18446744073709551 with expression of type 'unsigned int' is always false [-Wtautological-constant-out-of-range-compare]
if (opt < 1 || opt > ULONG_MAX / HZ) {
~~~ ^ ~~~~~~~~~~~~~~
net/ax25/af_ax25.c:602:11: warning: result of comparison of constant 307445734561825 with expression of type 'unsigned int' is always false [-Wtautological-constant-out-of-range-compare]
if (opt > ULONG_MAX / (60 * HZ)) {
~~~ ^ ~~~~~~~~~~~~~~~~~~~~~
4 warnings generated.
vim +569 net/ax25/af_ax25.c
^1da177e4c3f41 Linus Torvalds 2005-04-16 524
^1da177e4c3f41 Linus Torvalds 2005-04-16 525 /*
^1da177e4c3f41 Linus Torvalds 2005-04-16 526 * Handling for system calls applied via the various interfaces to an
^1da177e4c3f41 Linus Torvalds 2005-04-16 527 * AX25 socket object
^1da177e4c3f41 Linus Torvalds 2005-04-16 528 */
^1da177e4c3f41 Linus Torvalds 2005-04-16 529
^1da177e4c3f41 Linus Torvalds 2005-04-16 530 static int ax25_setsockopt(struct socket *sock, int level, int optname,
a7b75c5a8c4144 Christoph Hellwig 2020-07-23 531 sockptr_t optval, unsigned int optlen)
^1da177e4c3f41 Linus Torvalds 2005-04-16 532 {
^1da177e4c3f41 Linus Torvalds 2005-04-16 533 struct sock *sk = sock->sk;
^1da177e4c3f41 Linus Torvalds 2005-04-16 534 ax25_cb *ax25;
^1da177e4c3f41 Linus Torvalds 2005-04-16 535 struct net_device *dev;
^1da177e4c3f41 Linus Torvalds 2005-04-16 536 char devname[IFNAMSIZ];
a84e2204c4c268 Ralf Baechle 2021-09-30 537 unsigned int opt;
ba1cffe0257bcd Xi Wang 2011-12-27 538 int res = 0;
^1da177e4c3f41 Linus Torvalds 2005-04-16 539
^1da177e4c3f41 Linus Torvalds 2005-04-16 540 if (level != SOL_AX25)
^1da177e4c3f41 Linus Torvalds 2005-04-16 541 return -ENOPROTOOPT;
^1da177e4c3f41 Linus Torvalds 2005-04-16 542
ba1cffe0257bcd Xi Wang 2011-12-27 543 if (optlen < sizeof(unsigned int))
^1da177e4c3f41 Linus Torvalds 2005-04-16 544 return -EINVAL;
^1da177e4c3f41 Linus Torvalds 2005-04-16 545
a7b75c5a8c4144 Christoph Hellwig 2020-07-23 546 if (copy_from_sockptr(&opt, optval, sizeof(unsigned int)))
^1da177e4c3f41 Linus Torvalds 2005-04-16 547 return -EFAULT;
^1da177e4c3f41 Linus Torvalds 2005-04-16 548
^1da177e4c3f41 Linus Torvalds 2005-04-16 549 lock_sock(sk);
3200392b88dd25 David Miller 2015-06-25 550 ax25 = sk_to_ax25(sk);
^1da177e4c3f41 Linus Torvalds 2005-04-16 551
^1da177e4c3f41 Linus Torvalds 2005-04-16 552 switch (optname) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 553 case AX25_WINDOW:
^1da177e4c3f41 Linus Torvalds 2005-04-16 554 if (ax25->modulus == AX25_MODULUS) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 555 if (opt < 1 || opt > 7) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 556 res = -EINVAL;
^1da177e4c3f41 Linus Torvalds 2005-04-16 557 break;
^1da177e4c3f41 Linus Torvalds 2005-04-16 558 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 559 } else {
^1da177e4c3f41 Linus Torvalds 2005-04-16 560 if (opt < 1 || opt > 63) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 561 res = -EINVAL;
^1da177e4c3f41 Linus Torvalds 2005-04-16 562 break;
^1da177e4c3f41 Linus Torvalds 2005-04-16 563 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 564 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 565 ax25->window = opt;
^1da177e4c3f41 Linus Torvalds 2005-04-16 566 break;
^1da177e4c3f41 Linus Torvalds 2005-04-16 567
^1da177e4c3f41 Linus Torvalds 2005-04-16 568 case AX25_T1:
be639ac6901a08 Ralf Baechle 2011-11-24 @569 if (opt < 1 || opt > ULONG_MAX / HZ) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 570 res = -EINVAL;
^1da177e4c3f41 Linus Torvalds 2005-04-16 571 break;
^1da177e4c3f41 Linus Torvalds 2005-04-16 572 }
f16f3026db6fa6 Eric Dumazet 2008-01-13 573 ax25->rtt = (opt * HZ) >> 1;
^1da177e4c3f41 Linus Torvalds 2005-04-16 574 ax25->t1 = opt * HZ;
^1da177e4c3f41 Linus Torvalds 2005-04-16 575 break;
^1da177e4c3f41 Linus Torvalds 2005-04-16 576
^1da177e4c3f41 Linus Torvalds 2005-04-16 577 case AX25_T2:
be639ac6901a08 Ralf Baechle 2011-11-24 578 if (opt < 1 || opt > ULONG_MAX / HZ) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 579 res = -EINVAL;
^1da177e4c3f41 Linus Torvalds 2005-04-16 580 break;
^1da177e4c3f41 Linus Torvalds 2005-04-16 581 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 582 ax25->t2 = opt * HZ;
^1da177e4c3f41 Linus Torvalds 2005-04-16 583 break;
^1da177e4c3f41 Linus Torvalds 2005-04-16 584
^1da177e4c3f41 Linus Torvalds 2005-04-16 585 case AX25_N2:
^1da177e4c3f41 Linus Torvalds 2005-04-16 586 if (opt < 1 || opt > 31) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 587 res = -EINVAL;
^1da177e4c3f41 Linus Torvalds 2005-04-16 588 break;
^1da177e4c3f41 Linus Torvalds 2005-04-16 589 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 590 ax25->n2 = opt;
^1da177e4c3f41 Linus Torvalds 2005-04-16 591 break;
^1da177e4c3f41 Linus Torvalds 2005-04-16 592
^1da177e4c3f41 Linus Torvalds 2005-04-16 593 case AX25_T3:
be639ac6901a08 Ralf Baechle 2011-11-24 594 if (opt < 1 || opt > ULONG_MAX / HZ) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 595 res = -EINVAL;
^1da177e4c3f41 Linus Torvalds 2005-04-16 596 break;
^1da177e4c3f41 Linus Torvalds 2005-04-16 597 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 598 ax25->t3 = opt * HZ;
^1da177e4c3f41 Linus Torvalds 2005-04-16 599 break;
^1da177e4c3f41 Linus Torvalds 2005-04-16 600
^1da177e4c3f41 Linus Torvalds 2005-04-16 601 case AX25_IDLE:
ba1cffe0257bcd Xi Wang 2011-12-27 602 if (opt > ULONG_MAX / (60 * HZ)) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 603 res = -EINVAL;
^1da177e4c3f41 Linus Torvalds 2005-04-16 604 break;
^1da177e4c3f41 Linus Torvalds 2005-04-16 605 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 606 ax25->idle = opt * 60 * HZ;
^1da177e4c3f41 Linus Torvalds 2005-04-16 607 break;
^1da177e4c3f41 Linus Torvalds 2005-04-16 608
^1da177e4c3f41 Linus Torvalds 2005-04-16 609 case AX25_BACKOFF:
ba1cffe0257bcd Xi Wang 2011-12-27 610 if (opt > 2) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 611 res = -EINVAL;
^1da177e4c3f41 Linus Torvalds 2005-04-16 612 break;
^1da177e4c3f41 Linus Torvalds 2005-04-16 613 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 614 ax25->backoff = opt;
^1da177e4c3f41 Linus Torvalds 2005-04-16 615 break;
^1da177e4c3f41 Linus Torvalds 2005-04-16 616
^1da177e4c3f41 Linus Torvalds 2005-04-16 617 case AX25_EXTSEQ:
^1da177e4c3f41 Linus Torvalds 2005-04-16 618 ax25->modulus = opt ? AX25_EMODULUS : AX25_MODULUS;
^1da177e4c3f41 Linus Torvalds 2005-04-16 619 break;
^1da177e4c3f41 Linus Torvalds 2005-04-16 620
^1da177e4c3f41 Linus Torvalds 2005-04-16 621 case AX25_PIDINCL:
^1da177e4c3f41 Linus Torvalds 2005-04-16 622 ax25->pidincl = opt ? 1 : 0;
^1da177e4c3f41 Linus Torvalds 2005-04-16 623 break;
^1da177e4c3f41 Linus Torvalds 2005-04-16 624
^1da177e4c3f41 Linus Torvalds 2005-04-16 625 case AX25_IAMDIGI:
^1da177e4c3f41 Linus Torvalds 2005-04-16 626 ax25->iamdigi = opt ? 1 : 0;
^1da177e4c3f41 Linus Torvalds 2005-04-16 627 break;
^1da177e4c3f41 Linus Torvalds 2005-04-16 628
^1da177e4c3f41 Linus Torvalds 2005-04-16 629 case AX25_PACLEN:
^1da177e4c3f41 Linus Torvalds 2005-04-16 630 if (opt < 16 || opt > 65535) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 631 res = -EINVAL;
^1da177e4c3f41 Linus Torvalds 2005-04-16 632 break;
^1da177e4c3f41 Linus Torvalds 2005-04-16 633 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 634 ax25->paclen = opt;
^1da177e4c3f41 Linus Torvalds 2005-04-16 635 break;
^1da177e4c3f41 Linus Torvalds 2005-04-16 636
^1da177e4c3f41 Linus Torvalds 2005-04-16 637 case SO_BINDTODEVICE:
687775cec056b3 Eric Dumazet 2020-05-19 638 if (optlen > IFNAMSIZ - 1)
687775cec056b3 Eric Dumazet 2020-05-19 639 optlen = IFNAMSIZ - 1;
687775cec056b3 Eric Dumazet 2020-05-19 640
687775cec056b3 Eric Dumazet 2020-05-19 641 memset(devname, 0, sizeof(devname));
2f72291d3d0e44 Ralf Baechle 2009-09-28 642
a7b75c5a8c4144 Christoph Hellwig 2020-07-23 643 if (copy_from_sockptr(devname, optval, optlen)) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 644 res = -EFAULT;
^1da177e4c3f41 Linus Torvalds 2005-04-16 645 break;
^1da177e4c3f41 Linus Torvalds 2005-04-16 646 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 647
^1da177e4c3f41 Linus Torvalds 2005-04-16 648 if (sk->sk_type == SOCK_SEQPACKET &&
^1da177e4c3f41 Linus Torvalds 2005-04-16 649 (sock->state != SS_UNCONNECTED ||
^1da177e4c3f41 Linus Torvalds 2005-04-16 650 sk->sk_state == TCP_LISTEN)) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 651 res = -EADDRNOTAVAIL;
2f72291d3d0e44 Ralf Baechle 2009-09-28 652 break;
2f72291d3d0e44 Ralf Baechle 2009-09-28 653 }
2f72291d3d0e44 Ralf Baechle 2009-09-28 654
c433570458e49b Cong Wang 2018-12-29 655 rtnl_lock();
c433570458e49b Cong Wang 2018-12-29 656 dev = __dev_get_by_name(&init_net, devname);
2f72291d3d0e44 Ralf Baechle 2009-09-28 657 if (!dev) {
c433570458e49b Cong Wang 2018-12-29 658 rtnl_unlock();
2f72291d3d0e44 Ralf Baechle 2009-09-28 659 res = -ENODEV;
^1da177e4c3f41 Linus Torvalds 2005-04-16 660 break;
^1da177e4c3f41 Linus Torvalds 2005-04-16 661 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 662
^1da177e4c3f41 Linus Torvalds 2005-04-16 663 ax25->ax25_dev = ax25_dev_ax25dev(dev);
c433570458e49b Cong Wang 2018-12-29 664 if (!ax25->ax25_dev) {
c433570458e49b Cong Wang 2018-12-29 665 rtnl_unlock();
c433570458e49b Cong Wang 2018-12-29 666 res = -ENODEV;
c433570458e49b Cong Wang 2018-12-29 667 break;
c433570458e49b Cong Wang 2018-12-29 668 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 669 ax25_fillin_cb(ax25, ax25->ax25_dev);
c433570458e49b Cong Wang 2018-12-29 670 rtnl_unlock();
^1da177e4c3f41 Linus Torvalds 2005-04-16 671 break;
^1da177e4c3f41 Linus Torvalds 2005-04-16 672
^1da177e4c3f41 Linus Torvalds 2005-04-16 673 default:
^1da177e4c3f41 Linus Torvalds 2005-04-16 674 res = -ENOPROTOOPT;
^1da177e4c3f41 Linus Torvalds 2005-04-16 675 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 676 release_sock(sk);
^1da177e4c3f41 Linus Torvalds 2005-04-16 677
^1da177e4c3f41 Linus Torvalds 2005-04-16 678 return res;
^1da177e4c3f41 Linus Torvalds 2005-04-16 679 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 680
---
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