If you're still taking things for 5.3 stable, I humbly request picking up commit 21ab8580b383 ("LSM: SafeSetID: Stop releasing uninitialized ruleset"). While bisecting other problems this crash tripped me up and I would have been able to bisect faster had the fix been in linux-stable. Only kernel 5.3 is affected. For reference, the crash for me looked like: Call trace: __call_rcu+0x2c/0x1ac call_rcu+0x28/0x34 safesetid_file_write+0x344/0x350 __vfs_write+0x54/0x18c vfs_write+0xcc/0x18c ksys_write+0x7c/0xe4 __arm64_sys_write+0x20/0x2c el0_svc_common+0x9c/0x14c el0_svc_compat_handler+0x28/0x34 el0_svc_compat+0x8/0x10 Thanks much. -Doug