* [PATCH] ext4: check the acl's validity before setting [not found] <1396922063-4879-1-git-send-email-zhenzhang.zhang@huawei.com> @ 2014-04-08 2:02 ` ZhangZhen 2014-04-08 5:46 ` Christoph Hellwig 0 siblings, 1 reply; 4+ messages in thread From: ZhangZhen @ 2014-04-08 2:02 UTC (permalink / raw) To: tytso, Jan Kara; +Cc: linux-ext4 Before setting the acl, call posix_acl_valid() to check if it is valid or not. Signed-off-by: zhang zhen <zhenzhang.zhang@huawei.com> --- fs/ext4/acl.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c index d40c8db..97f7650 100644 --- a/fs/ext4/acl.c +++ b/fs/ext4/acl.c @@ -197,6 +197,12 @@ __ext4_set_acl(handle_t *handle, struct inode *inode, int type, size_t size = 0; int error; + if (acl) { + error = posix_acl_valid(acl); + if (error < 0) + return error; + } + switch (type) { case ACL_TYPE_ACCESS: name_index = EXT4_XATTR_INDEX_POSIX_ACL_ACCESS; -- 1.6.0.2 ^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] ext4: check the acl's validity before setting 2014-04-08 2:02 ` [PATCH] ext4: check the acl's validity before setting ZhangZhen @ 2014-04-08 5:46 ` Christoph Hellwig 2014-04-08 8:59 ` ZhangZhen 0 siblings, 1 reply; 4+ messages in thread From: Christoph Hellwig @ 2014-04-08 5:46 UTC (permalink / raw) To: ZhangZhen; +Cc: tytso, Jan Kara, linux-ext4 On Tue, Apr 08, 2014 at 10:02:50AM +0800, ZhangZhen wrote: > Before setting the acl, call posix_acl_valid() to check if it is > valid or not. Why? posix_acl_xattr_set already does that for you, and it's the only way to feed in an ACL from userspace. ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] ext4: check the acl's validity before setting 2014-04-08 5:46 ` Christoph Hellwig @ 2014-04-08 8:59 ` ZhangZhen 2014-04-08 10:40 ` Christoph Hellwig 0 siblings, 1 reply; 4+ messages in thread From: ZhangZhen @ 2014-04-08 8:59 UTC (permalink / raw) To: Christoph Hellwig; +Cc: tytso, Jan Kara, linux-ext4 On 2014/4/8 13:46, Christoph Hellwig wrote: > On Tue, Apr 08, 2014 at 10:02:50AM +0800, ZhangZhen wrote: >> Before setting the acl, call posix_acl_valid() to check if it is >> valid or not. > > Why? posix_acl_xattr_set already does that for you, and it's the only > way to feed in an ACL from userspace. > > > Hi Hellwig, You are right, this patch is useless. I'm sorry for this spam mail. But btrfs_set_acl checks the validity of the ACL too. Should we delete it? Another choice is we can check the validity in every fs tree, and delete the check from posix_acl_xattr_set. How should we do? Thanks! ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] ext4: check the acl's validity before setting 2014-04-08 8:59 ` ZhangZhen @ 2014-04-08 10:40 ` Christoph Hellwig 0 siblings, 0 replies; 4+ messages in thread From: Christoph Hellwig @ 2014-04-08 10:40 UTC (permalink / raw) To: ZhangZhen; +Cc: Christoph Hellwig, tytso, Jan Kara, linux-ext4 On Tue, Apr 08, 2014 at 04:59:48PM +0800, ZhangZhen wrote: > You are right, this patch is useless. I'm sorry for this spam mail. > > But btrfs_set_acl checks the validity of the ACL too. Should we delete it? > Another choice is we can check the validity in every fs tree, and delete the > check from posix_acl_xattr_set. Doing it in common code is the right thing. I suspect btrfs having it is an oversight, but please verify it with the btrfs maintainers. ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2014-04-08 10:40 UTC | newest]
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[not found] <1396922063-4879-1-git-send-email-zhenzhang.zhang@huawei.com>
2014-04-08 2:02 ` [PATCH] ext4: check the acl's validity before setting ZhangZhen
2014-04-08 5:46 ` Christoph Hellwig
2014-04-08 8:59 ` ZhangZhen
2014-04-08 10:40 ` Christoph Hellwig
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