1. 02 11月, 2011 2 次提交
  2. 18 8月, 2011 1 次提交
  3. 12 8月, 2011 1 次提交
  4. 07 7月, 2011 1 次提交
  5. 22 6月, 2011 2 次提交
  6. 24 5月, 2011 1 次提交
    • D
      net: convert %p usage to %pK · 71338aa7
      Dan Rosenberg 提交于
      The %pK format specifier is designed to hide exposed kernel pointers,
      specifically via /proc interfaces.  Exposing these pointers provides an
      easy target for kernel write vulnerabilities, since they reveal the
      locations of writable structures containing easily triggerable function
      pointers.  The behavior of %pK depends on the kptr_restrict sysctl.
      
      If kptr_restrict is set to 0, no deviation from the standard %p behavior
      occurs.  If kptr_restrict is set to 1, the default, if the current user
      (intended to be a reader via seq_printf(), etc.) does not have CAP_SYSLOG
      (currently in the LSM tree), kernel pointers using %pK are printed as 0's.
       If kptr_restrict is set to 2, kernel pointers using %pK are printed as
      0's regardless of privileges.  Replacing with 0's was chosen over the
      default "(null)", which cannot be parsed by userland %p, which expects
      "(nil)".
      
      The supporting code for kptr_restrict and %pK are currently in the -mm
      tree.  This patch converts users of %p in net/ to %pK.  Cases of printing
      pointers to the syslog are not covered, since this would eliminate useful
      information for postmortem debugging and the reading of the syslog is
      already optionally protected by the dmesg_restrict sysctl.
      Signed-off-by: NDan Rosenberg <drosenberg@vsecurity.com>
      Cc: James Morris <jmorris@namei.org>
      Cc: Eric Dumazet <eric.dumazet@gmail.com>
      Cc: Thomas Graf <tgraf@infradead.org>
      Cc: Eugene Teo <eugeneteo@kernel.org>
      Cc: Kees Cook <kees.cook@canonical.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: David S. Miller <davem@davemloft.net>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Eric Paris <eparis@parisplace.org>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      71338aa7
  7. 11 5月, 2011 1 次提交
  8. 09 5月, 2011 3 次提交
  9. 29 4月, 2011 1 次提交
    • E
      inet: add RCU protection to inet->opt · f6d8bd05
      Eric Dumazet 提交于
      We lack proper synchronization to manipulate inet->opt ip_options
      
      Problem is ip_make_skb() calls ip_setup_cork() and
      ip_setup_cork() possibly makes a copy of ipc->opt (struct ip_options),
      without any protection against another thread manipulating inet->opt.
      
      Another thread can change inet->opt pointer and free old one under us.
      
      Use RCU to protect inet->opt (changed to inet->inet_opt).
      
      Instead of handling atomic refcounts, just copy ip_options when
      necessary, to avoid cache line dirtying.
      
      We cant insert an rcu_head in struct ip_options since its included in
      skb->cb[], so this patch is large because I had to introduce a new
      ip_options_rcu structure.
      Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
      Cc: Herbert Xu <herbert@gondor.apana.org.au>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      f6d8bd05
  10. 23 4月, 2011 1 次提交
  11. 31 3月, 2011 2 次提交
  12. 13 3月, 2011 5 次提交
  13. 04 3月, 2011 1 次提交
  14. 03 3月, 2011 1 次提交
  15. 02 3月, 2011 5 次提交
  16. 25 1月, 2011 1 次提交
  17. 17 12月, 2010 2 次提交
  18. 18 11月, 2010 1 次提交
  19. 17 11月, 2010 1 次提交
  20. 11 11月, 2010 1 次提交
  21. 26 10月, 2010 1 次提交
  22. 09 9月, 2010 1 次提交
    • E
      udp: add rehash on connect() · 719f8358
      Eric Dumazet 提交于
      commit 30fff923 introduced in linux-2.6.33 (udp: bind() optimisation)
      added a secondary hash on UDP, hashed on (local addr, local port).
      
      Problem is that following sequence :
      
      fd = socket(...)
      connect(fd, &remote, ...)
      
      not only selects remote end point (address and port), but also sets
      local address, while UDP stack stored in secondary hash table the socket
      while its local address was INADDR_ANY (or ipv6 equivalent)
      
      Sequence is :
       - autobind() : choose a random local port, insert socket in hash tables
                    [while local address is INADDR_ANY]
       - connect() : set remote address and port, change local address to IP
                    given by a route lookup.
      
      When an incoming UDP frame comes, if more than 10 sockets are found in
      primary hash table, we switch to secondary table, and fail to find
      socket because its local address changed.
      
      One solution to this problem is to rehash datagram socket if needed.
      
      We add a new rehash(struct socket *) method in "struct proto", and
      implement this method for UDP v4 & v6, using a common helper.
      
      This rehashing only takes care of secondary hash table, since primary
      hash (based on local port only) is not changed.
      Reported-by: NKrzysztof Piotr Oledzki <ole@ans.pl>
      Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
      Tested-by: NKrzysztof Piotr Oledzki <ole@ans.pl>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      719f8358
  23. 19 8月, 2010 1 次提交
  24. 11 6月, 2010 1 次提交
  25. 01 6月, 2010 1 次提交
  26. 29 5月, 2010 1 次提交