4.9-stable review patch. If anyone has any objections, please let me know.
------------------ From: James Simmons <jsimm...@infradead.org> [ Upstream commit 1b60f6dfa38403ff7c4d0b4b7ecdb810f9789a2a ] In ll_xattr_set_common() detect the removexattr() case correctly by testing for a NULL value as well as XATTR_REPLACE. Signed-off-by: John L. Hammond <john.hamm...@intel.com> Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-10787 Reviewed-on: https://review.whamcloud.com/ Reviewed-by: Dmitry Eremin <dmitry.ere...@intel.com> Reviewed-by: James Simmons <uja.o...@yahoo.com> Signed-off-by: James Simmons <jsimm...@infradead.org> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> Signed-off-by: Sasha Levin <alexander.le...@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> --- drivers/staging/lustre/lustre/llite/xattr.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) --- a/drivers/staging/lustre/lustre/llite/xattr.c +++ b/drivers/staging/lustre/lustre/llite/xattr.c @@ -103,7 +103,11 @@ ll_xattr_set_common(const struct xattr_h __u64 valid; int rc; - if (flags == XATTR_REPLACE) { + /* When setxattr() is called with a size of 0 the value is + * unconditionally replaced by "". When removexattr() is + * called we get a NULL value and XATTR_REPLACE for flags. + */ + if (!value && flags == XATTR_REPLACE) { ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_REMOVEXATTR, 1); valid = OBD_MD_FLXATTRRM; } else {
