)]}'
{
  "commit": "71338aa7d050c86d8765cd36e46be514fb0ebbce",
  "tree": "96bacb805b939c490145b31b4e2fb9e5cea79c5d",
  "parents": [
    "229de618ba6ff36e382b908b7637fe56c25ae9f1"
  ],
  "author": {
    "name": "Dan Rosenberg",
    "email": "drosenberg@vsecurity.com",
    "time": "Mon May 23 12:17:35 2011 +0000"
  },
  "committer": {
    "name": "David S. Miller",
    "email": "davem@davemloft.net",
    "time": "Tue May 24 01:13:12 2011 -0400"
  },
  "message": "net: convert %p usage to %pK\n\nThe %pK format specifier is designed to hide exposed kernel pointers,\nspecifically via /proc interfaces.  Exposing these pointers provides an\neasy target for kernel write vulnerabilities, since they reveal the\nlocations of writable structures containing easily triggerable function\npointers.  The behavior of %pK depends on the kptr_restrict sysctl.\n\nIf kptr_restrict is set to 0, no deviation from the standard %p behavior\noccurs.  If kptr_restrict is set to 1, the default, if the current user\n(intended to be a reader via seq_printf(), etc.) does not have CAP_SYSLOG\n(currently in the LSM tree), kernel pointers using %pK are printed as 0\u0027s.\n If kptr_restrict is set to 2, kernel pointers using %pK are printed as\n0\u0027s regardless of privileges.  Replacing with 0\u0027s was chosen over the\ndefault \"(null)\", which cannot be parsed by userland %p, which expects\n\"(nil)\".\n\nThe supporting code for kptr_restrict and %pK are currently in the -mm\ntree.  This patch converts users of %p in net/ to %pK.  Cases of printing\npointers to the syslog are not covered, since this would eliminate useful\ninformation for postmortem debugging and the reading of the syslog is\nalready optionally protected by the dmesg_restrict sysctl.\n\nSigned-off-by: Dan Rosenberg \u003cdrosenberg@vsecurity.com\u003e\nCc: James Morris \u003cjmorris@namei.org\u003e\nCc: Eric Dumazet \u003ceric.dumazet@gmail.com\u003e\nCc: Thomas Graf \u003ctgraf@infradead.org\u003e\nCc: Eugene Teo \u003ceugeneteo@kernel.org\u003e\nCc: Kees Cook \u003ckees.cook@canonical.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: David S. Miller \u003cdavem@davemloft.net\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Eric Paris \u003ceparis@parisplace.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: David S. Miller \u003cdavem@davemloft.net\u003e\n",
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