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| author | J. Bruce Fields <bfields@citi.umich.edu> | 2009-05-06 01:04:29 +0200 |
|---|---|---|
| committer | J. Bruce Fields <bfields@citi.umich.edu> | 2009-05-06 22:16:36 +0200 |
| commit | b2c0cea6b1cb210e962f07047df602875564069e (patch) | |
| tree | f6327b45df075955d8ef9e9ad93c453ea5fc7a4c /fs/lockd | |
| parent | nfsd41: slots are freed with session (diff) | |
| download | linux-b2c0cea6b1cb210e962f07047df602875564069e.tar.xz linux-b2c0cea6b1cb210e962f07047df602875564069e.zip | |
nfsd4: check for negative dentry before use in nfsv4 readdir
After 2f9092e1020246168b1309b35e085ecd7ff9ff72 "Fix i_mutex vs. readdir
handling in nfsd" (and 14f7dd63 "Copy XFS readdir hack into nfsd code"),
an entry may be removed between the first mutex_unlock and the second
mutex_lock. In this case, lookup_one_len() will return a negative
dentry. Check for this case to avoid a NULL dereference.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Reviewed-by: J. R. Okajima <hooanon05@yahoo.co.jp>
Cc: stable@kernel.org
Diffstat (limited to 'fs/lockd')
0 files changed, 0 insertions, 0 deletions