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authorAl Viro <viro@zeniv.linux.org.uk>2016-06-05 07:23:09 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2016-06-05 07:23:09 +0300
commite6ec03a25f12b312b7e0c037fe4a6471c4ee5665 (patch)
treed39790d5a1e2a78fbd76b0ea6082f1a8016fc195 /fs/dcache.c
parentfac7d1917dfddfa53e98524f0abfbe60252740fe (diff)
downloadlinux-e6ec03a25f12b312b7e0c037fe4a6471c4ee5665.tar.xz
autofs braino fix for do_last()
It's an analogue of commit 7500c38a (fix the braino in "namei: massage lookup_slow() to be usable by lookup_one_len_unlocked()"). The same problem (->lookup()-returned unhashed negative dentry just might be an autofs one with ->d_manage() that would wait until the daemon makes it positive) applies in do_last() - we need to do follow_managed() first. Fortunately, remaining callers of follow_managed() are OK - only autofs has that weirdness (negative dentry that does not mean an instant -ENOENT)) and autofs never has its negative dentries hashed, so we can't pick one from a dcache lookup. ->d_manage() is a bloody mess ;-/ Cc: stable@vger.kernel.org # v4.6 Spotted-by: Ian Kent <raven@themaw.net> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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