0.15.06-2 against 6.2.0-1006-kvm also eats memory, but sometimes adds:

13:06:48.136501 AppArmor DFA next/check upper bounds error
13:06:48.204486 AppArmor DFA next/check upper bounds error
13:06:48.228502 AppArmor DFA next/check upper bounds error
13:06:48.476002 AppArmor DFA state with invalid match flags
13:06:48.476068 BUG: kernel NULL pointer dereference, address: 0000000000000030
13:06:48.476526 #PF: supervisor read access in kernel mode
13:06:48.485451 #PF: error_code(0x0000) - not-present page
13:06:48.485583 PGD 0 P4D 0 
13:06:48.485653 Oops: 0000 [#1] SMP NOPTI
13:06:48.485696 CPU: 3 PID: 16589 Comm: stress-ng-appar Not tainted 6.2.0-1006-kvm #6-Ubuntu
13:06:48.485729 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015
13:06:48.485757 RIP: 0010:0xffffffffb55599e8
13:06:48.485788 Code: b6 48 89 4d d0 0f 42 d8 e8 15 4b e6 ff 85 c0 74 19 4c 63 e0 48 83 c4 18 4c 89 e0 5b 41 5c 41 5d 41 5e 41 5f 5d e9 1c a8 59 00 <4d> 8b 55 30 49 8d 82 a0 00 00 00 4c 89 55 c0 48 89 c7 48 89 45 c8
13:06:48.485814 RSP: 0018:ffffb23b01037c70 EFLAGS: 00010246
13:06:48.485848 RAX: 0000000000000000 RBX: 00000000000041ed RCX: 0000000000000000
13:06:48.485867 RDX: 0000000000033090 RSI: ffffffffb6e6bca8 RDI: 0000000000000000
13:06:48.485898 RBP: ffffb23b01037cb0 R08: 0000000000000000 R09: 0000000000000000
13:06:48.485947 R10: ffffffffb53a8f4b R11: 0000000000000246 R12: ffffffffb5f00026
13:06:48.485981 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
13:06:48.486006 FS:  00007fb551056740(0000) GS:ffff9e3177cc0000(0000) knlGS:0000000000000000
13:06:48.486033 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
13:06:48.486051 CR2: 0000000000000030 CR3: 0000000103c86000 CR4: 0000000000350ee0
13:06:48.486076 Call Trace:
13:06:48.486102  <TASK>
13:06:48.486126  0xffffffffb555e326
13:06:48.486156  0xffffffffb556b7cb
13:06:48.486169  0xffffffffb555bf9f
13:06:48.486193  0xffffffffb555c0e9
13:06:48.486226  0xffffffffb53832fa
13:06:48.486251  ? 0xffffffffb51f8bd0
13:06:48.486271  0xffffffffb53837d2
13:06:48.486295  0xffffffffb5383878
13:06:48.486320  0xffffffffb5addf37
13:06:48.486351  ? 0xffffffffb5ae24f5
13:06:48.486370  ? 0xffffffffb5addf43
13:06:48.486401  ? 0xffffffffb5ae25b1
13:06:48.486427  ? 0xffffffffb5ae1c3f
13:06:48.486446  0xffffffffb5c000ae
13:06:48.486465 RIP: 0033:0x00007fb550d069e4
13:06:48.486490 Code: 15 39 a4 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 80 3d fd 2b 0f 00 00 74 13 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 54 c3 0f 1f 00 48 83 ec 28 48 89 54 24 18 48
13:06:48.486508 RSP: 002b:00007ffe81ae16a8 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
13:06:48.486532 RAX: ffffffffffffffda RBX: 0000556e11d97fc0 RCX: 00007fb550d069e4
13:06:48.486564 RDX: 0000000000010d92 RSI: 0000556e11d9a890 RDI: 0000000000000005
13:06:48.486589 RBP: 0000000000010d92 R08: 0000556e11dc7510 R09: 00000000ffffffff
13:06:48.486608 R10: 0000000000000000 R11: 0000000000000202 R12: 0000556e11d9a890
13:06:48.486633 R13: 0000000000000005 R14: 0000000000000000 R15: 00007fb54f37e000
13:06:48.486657  </TASK>
13:06:48.486676 Modules linked in: ip6t_REJECT nf_reject_ipv6 nft_limit nft_chain_nat nf_nat xt_owner xt_hashlimit xt_tcpudp ipt_REJECT nf_reject_ipv4 xt_conntrack xt_LOG nf_log_syslog xt_limit xt_comment nft_compat nf_tables nls_iso8859_1 nls_cp437 vfat fat fuse configfs ip_tables x_tables btrfs blake2b_generic xor lzo_compress raid6_pq efivarfs nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 libcrc32c polyval_clmulni polyval_generic gf128mul ahci libahci
13:06:48.486699 CR2: 0000000000000030
13:06:48.486712 ---[ end trace 0000000000000000 ]---
13:06:48.486734 RIP: 0010:0xffffffffb55599e8
13:06:48.486753 Code: b6 48 89 4d d0 0f 42 d8 e8 15 4b e6 ff 85 c0 74 19 4c 63 e0 48 83 c4 18 4c 89 e0 5b 41 5c 41 5d 41 5e 41 5f 5d e9 1c a8 59 00 <4d> 8b 55 30 49 8d 82 a0 00 00 00 4c 89 55 c0 48 89 c7 48 89 45 c8
13:06:48.486773 RSP: 0018:ffffb23b01037c70 EFLAGS: 00010246
13:06:48.486792 RAX: 0000000000000000 RBX: 00000000000041ed RCX: 0000000000000000
13:06:48.486811 RDX: 0000000000033090 RSI: ffffffffb6e6bca8 RDI: 0000000000000000
13:06:48.486823 RBP: ffffb23b01037cb0 R08: 0000000000000000 R09: 0000000000000000
13:06:48.486834 R10: ffffffffb53a8f4b R11: 0000000000000246 R12: ffffffffb5f00026
13:06:48.486852 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
13:06:48.486870 FS:  00007fb551056740(0000) GS:ffff9e3177cc0000(0000) knlGS:0000000000000000
13:06:48.486889 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
13:06:48.486902 CR2: 0000000000000030 CR3: 0000000103c86000 CR4: 0000000000350ee0
13:06:48.486920 note: stress-ng-appar[16589] exited with irqs disabled