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proc: protect ptrace_may_access() with exec_update_lock (part 1)

In the Linux kernel, the following vulnerability has been resolved: proc: protect ptrace_may_access() with exec_update_lock (part 1) Fix the easy cases where procfs currently calls ptrace_may_access() without exec_update_lock protection, where the fix is to simply add the extra lock or use mm_access(): - do_task_stat(): grab exec_update_lock - proc_pid_wchan(): grab exec_update_lock - proc_map_files_lookup(): use mm_access() instead of get_task_mm() - proc_map_files_readdir(): use mm_access() instead of get_task_mm() - proc_ns_get_link(): grab exec_update_lock - proc_ns_readlink(): grab exec_update_lock

Affected products

Linux
  • <2.6.30
  • <6650527444dadc63d84aa939d14ecba4fadb2f69
  • <2.6.30
  • =<7.1.*
  • =<6.1.*
  • =<5.15.*
  • <ae1e630bcaac739f625822078edbaea98366930d
  • =<5.10.*
  • <c1cfd63326f5d09999134e9052c353faf738286e
  • ==334ed22054b2ec8477e4409e214fc139cf937ef6
  • <2.6.28
  • <bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9
  • <d54f14655fd7d7b293698a8b6918563c4c0465e7
  • <7456ae990a9738962b33146916fabca62ae3d4e0
  • ==2.6.30
  • =<6.6.*
  • ==6b06d6282100dd5aacf7d45443d651a1995bd9c4
  • <4bfe8c481846cee52473a2f7d7b30ee8e6749fc4
  • =<6.18.*
  • <f9b4b03ccc9c69bf7f7298d4559906ebea7143b3
  • =<6.12.*
  • =<*