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| author |   Chengguang Xu <cgxu519@mykernel.net> | 2019-10-08 22:50:59 +0800 |
|---|---|---|
| committer |   Jan Kara <jack@suse.cz> | 2019-10-08 17:26:18 +0200 |
| commit | a6810312b835ed927edaef0e96217c02084c7f4f (patch) | |
| tree | 58db19afa3c0d4c9198a643998e07b09c782467b /fs/quota | |
| parent | quota: code cleanup for hash bits calculation (diff) | |
| download | linux-dev-a6810312b835ed927edaef0e96217c02084c7f4f.tar.xz linux-dev-a6810312b835ed927edaef0e96217c02084c7f4f.zip | |
quota: check quota type in early stage
Check quota type in early stage so we can avoid many
unncessary operations when the type is wrong.
Link: https://lore.kernel.org/r/20191008145059.21402-1-cgxu519@mykernel.net
Signed-off-by: Chengguang Xu <cgxu519@mykernel.net>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/quota')
| -rw-r--r-- | fs/quota/quota.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/fs/quota/quota.c b/fs/quota/quota.c index cb13fb76dbee..5444d3c4d93f 100644 --- a/fs/quota/quota.c +++ b/fs/quota/quota.c @@ -60,8 +60,6 @@ static int quota_sync_all(int type) { int ret; - if (type >= MAXQUOTAS) - return -EINVAL; ret = security_quotactl(Q_SYNC, type, 0, NULL); if (!ret) iterate_supers(quota_sync_one, &type); @@ -686,8 +684,6 @@ static int do_quotactl(struct super_block *sb, int type, int cmd, qid_t id, { int ret; - if (type >= MAXQUOTAS) - return -EINVAL; type = array_index_nospec(type, MAXQUOTAS); /* * Quota not supported on this fs? Check this before s_quota_types @@ -831,6 +827,9 @@ int kernel_quotactl(unsigned int cmd, const char __user *special, cmds = cmd >> SUBCMDSHIFT; type = cmd & SUBCMDMASK; + if (type >= MAXQUOTAS) + return -EINVAL; + /* * As a special case Q_SYNC can be called without a specific device. * It will iterate all superblocks that have quota enabled and call |