In the Linux kernel, the following vulnerability has been resolved: jfs: Fix uninit-value access of newea in eabuffer syzbot reports that lzo1x1docompress is using uninit-value: ===================================================== BUG: KMSAN: uninit-value in lzo1x1docompress+0x19f9/0x2510 lib/lzo/lzo1xcompress.c:178 ... Uninit was stored to memory at: eaput fs/jfs/xattr.c:639 [inline] ... Local variable eabuf created at: _jfssetxattr+0x5d/0x1ae0 fs/jfs/xattr.c:662 _jfsxattrset+0xe6/0x1f0 fs/jfs/xattr.c:934 ===================================================== The reason is eabuf->newea is not initialized properly. Fix this by using memset to empty its content at the beginning in ea_get().