Apologies the patch above wasn't quite full/correct, this patch on top
of Ubuntu-6.8.0-64.67 is what the team has stated seems to be working
ok:
diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c
index 4c767a20ac4c..29998982e456 100644
--- a/fs/ceph/xattr.c
+++ b/fs/ceph/xattr.c
@@ -1428,6 +1428,8 @@ int ceph_security_init_secctx(struct dentry *dentry,
umode_t mode,
as_ctx->pagelist = pagelist;
}
+ ceph_pagelist_encode_32(pagelist, name_len);
+ ceph_pagelist_append(pagelist, name, name_len);
ceph_pagelist_encode_32(pagelist, as_ctx->lsmctx.len);
ceph_pagelist_append(pagelist, as_ctx->lsmctx.context,
as_ctx->lsmctx.len);
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 35e763fa6aa5..ee67157e7143 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -2909,7 +2909,7 @@ static int selinux_dentry_init_security(struct dentry
*dentry, int mode,
*xattr_name = XATTR_NAME_SELINUX;
cp->id = LSM_ID_SELINUX;
- return security_sid_to_context(newsid, (char **)cp->context,
+ return security_sid_to_context(newsid, &cp->context,
&cp->len);
}
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https://bugs.launchpad.net/bugs/2115447
Title:
Ubuntu 24.04.2: NULL pointer dereference with Ceph and selinux
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