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authorAl Viro <viro@zeniv.linux.org.uk>2012-01-10 22:20:12 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2012-01-11 00:19:12 -0500
commit4041bcdc7bef06a2fb29c57394c713a74bd13b08 (patch)
treeadaf5dee1b8312cdd37a2b37551770af461212a3 /fs/autofs4/autofs_i.h
parentb3f2a92447b8443360ac117a3d7c06689562a70c (diff)
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autofs4: autofs4_wait() vs. autofs4_catatonic_mode() race
We need to recheck ->catatonic after autofs4_wait() got ->wq_mutex for good, or we might end up with wq inserted into queue after autofs4_catatonic_mode() had done its thing. It will stick there forever, since there won't be anything to clear its ->name.name. A bit of a complication: validate_request() drops and regains ->wq_mutex. It actually ends up the most convenient place to stick the check into... Acked-by: Ian Kent <raven@themaw.net> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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