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authorAl Viro <viro@zeniv.linux.org.uk>2015-05-07 20:37:40 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2015-05-11 08:13:13 -0400
commit31956502dd2c9432523d01373a9dc0e5931cfa1c (patch)
tree113687c758ac261f3a72c4027baf0007ab6d5647 /fs/namespace.c
parent6548fae2eca6b66c7257af6663fdbdf5a50745fd (diff)
namei: make may_follow_link() safe in RCU mode
We *can't* call that audit garbage in RCU mode - it's doing a weird mix of allocations (GFP_NOFS, immediately followed by GFP_KERNEL) and I'm not touching that... thing again. So if this security sclero^Whardening feature gets triggered when we are in RCU mode, tough - we'll fail with -ECHILD and have everything restarted in non-RCU mode. Only to hit the same test and fail, this time with EACCES and with (oh, rapture) an audit spew produced. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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