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Date: Fri, 5 Jun 2020 17:20:05 +0200 From: Jan Kara <jack@...e.cz> To: Chengguang Xu <cgxu519@...ernel.net> Cc: jack@...e.com, linux-ext4@...r.kernel.org Subject: Re: [PATCH] ext2: fix improper assignment for e_value_offs On Wed 03-06-20 16:44:29, Chengguang Xu wrote: > In the process of changing value for existing EA, > there is an improper assignment of e_value_offs(setting to 0), > because it will be reset to incorrect value in the following > loop(shifting EA values before target). Delayed assignment > can avoid this issue. > > Signed-off-by: Chengguang Xu <cgxu519@...ernel.net> Thanks. I've added the patch to my tree. Honza > --- > fs/ext2/xattr.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/fs/ext2/xattr.c b/fs/ext2/xattr.c > index 943cc469f42f..c802ea682e7f 100644 > --- a/fs/ext2/xattr.c > +++ b/fs/ext2/xattr.c > @@ -588,7 +588,6 @@ ext2_xattr_set(struct inode *inode, int name_index, const char *name, > /* Remove the old value. */ > memmove(first_val + size, first_val, val - first_val); > memset(first_val, 0, size); > - here->e_value_offs = 0; > min_offs += size; > > /* Adjust all value offsets. */ > @@ -600,6 +599,8 @@ ext2_xattr_set(struct inode *inode, int name_index, const char *name, > cpu_to_le16(o + size); > last = EXT2_XATTR_NEXT(last); > } > + > + here->e_value_offs = 0; > } > if (value == NULL) { > /* Remove the old name. */ > -- > 2.20.1 > > -- Jan Kara <jack@...e.com> SUSE Labs, CR
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