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cifs: create sd context must be a multiple of 8

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commit 7d3fc01796fc895e5fcce45c994c5a8db8120a8d upstream.

We used to follow the rule earlier that the create SD context
always be a multiple of 8. However, with the change:
cifs: refactor create_sd_buf() and and avoid corrupting the buffer
...we recompute the length, and we failed that rule.
Fixing that with this change.

Cc: <stable@vger.kernel.org> # v5.10+
Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Shyam Prasad N 2021-08-04 18:37:22 +00:00 committed by AuxXxilium
parent 8156dea4f7
commit f98f1ce514
1 changed files with 1 additions and 1 deletions
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2
fs/cifs/smb2pdu.c
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@ -2412,7 +2412,7 @@ create_sd_buf(umode_t mode, bool set_owner, unsigned int *len)
memcpy(aclptr, &acl, sizeof(struct cifs_acl)); memcpy(aclptr, &acl, sizeof(struct cifs_acl));
buf->ccontext.DataLength = cpu_to_le32(ptr - (__u8 *)&buf->sd); buf->ccontext.DataLength = cpu_to_le32(ptr - (__u8 *)&buf->sd);
*len = ptr - (__u8 *)buf; *len = roundup(ptr - (__u8 *)buf, 8);
return buf; return buf;
} }