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| author | Tim Gardner <tim.gardner@canonical.com> | 2013-02-13 08:40:16 -0700 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2013-02-15 11:29:38 -0500 |
| commit | f25cc71e634edcf8a15bc60a48f2b5f3ec9fbb1d (patch) | |
| tree | b66f98dacd1c095dfded8ee673290230366dd8c8 /include/linux/lockd | |
| parent | deb4534f4f3be7aea7d9d24c3b0d58f370cbf9ef (diff) | |
| download | lwn-f25cc71e634edcf8a15bc60a48f2b5f3ec9fbb1d.tar.gz lwn-f25cc71e634edcf8a15bc60a48f2b5f3ec9fbb1d.zip | |
lockd: nlmclnt_reclaim(): avoid stack overflow
Even though nlmclnt_reclaim() is only one call into the stack frame,
928 bytes on the stack seems like a lot. Recode to dynamically
allocate the request structure once from within the reclaimer task,
then pass this pointer into nlmclnt_reclaim() for reuse on
subsequent calls.
smatch analysis:
fs/lockd/clntproc.c:620 nlmclnt_reclaim() warn: 'reqst' puts
928 bytes on stack
Also remove redundant assignment of 0 after memset.
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'include/linux/lockd')
| -rw-r--r-- | include/linux/lockd/lockd.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/lockd/lockd.h b/include/linux/lockd/lockd.h index f5a051a79273..a395f1e7998f 100644 --- a/include/linux/lockd/lockd.h +++ b/include/linux/lockd/lockd.h @@ -212,7 +212,8 @@ int nlmclnt_block(struct nlm_wait *block, struct nlm_rqst *req, long timeout) __be32 nlmclnt_grant(const struct sockaddr *addr, const struct nlm_lock *lock); void nlmclnt_recovery(struct nlm_host *); -int nlmclnt_reclaim(struct nlm_host *, struct file_lock *); +int nlmclnt_reclaim(struct nlm_host *, struct file_lock *, + struct nlm_rqst *); void nlmclnt_next_cookie(struct nlm_cookie *); /* |