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authorAl Viro <viro@zeniv.linux.org.uk>2011-03-23 22:52:50 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2011-03-24 00:01:18 +0300
commita9712bc12c40c172e393f85a9b2ba8db4bf59509 (patch)
treec40217e028ae937da7ad94e249e2247191ffcc8f /arch/powerpc
parent198214a7ee50375fa71a65e518341980cfd4b2f0 (diff)
downloadlinux-a9712bc12c40c172e393f85a9b2ba8db4bf59509.tar.xz
deal with races in /proc/*/{syscall,stack,personality}
All of those are rw-r--r-- and all are broken for suid - if you open a file before the target does suid-root exec, you'll be still able to access it. For personality it's not a big deal, but for syscall and stack it's a real problem. Fix: check that task is tracable for you at the time of read(). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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