WARNING in aa_policy_destroy

Status: upstream: reported syz repro on 2026/08/24 06:07
Subsystems: apparmor
Labels: prio:low
[Documentation on labels]
Reported-by: syzbot+faed97c4ed43bfe7fee5@syzkaller.appspotmail.com
Fix commit: 3daad923a868 apparmor: policy_int make sure list heads are initialized before fail path
Patched on: [ci-qemu-gce-upstream-auto ci-qemu-upstream-386 ci-upstream-gce-leak ci-upstream-kasan-badwrites-root ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-linux-next-kasan-gce-root ci-upstream-rust-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce], missing on: [ci-qemu-native-arm64-kvm ci-qemu-upstream ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-qemu2-riscv64 ci-snapshot-upstream-root ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-arm64 ci-upstream-kmsan-gce-386-root ci-upstream-kmsan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-usb]
First crash: 7d10h, last: 1d08h
✨ AI Patch Versions (1)
Version Stage Reported Report Link Job
1 moderation 2026/08/25 15:32 Discussion 8594cc18-d31f-4dc1-9d81-89d765382445
✨ AI Jobs (2)
ID Workflow Result Correct Bug Created Started Finished Revision
8594cc18 patching WARNING in aa_policy_destroy 2026/08/25 14:12 2026/08/25 14:12 2026/08/25 15:32 ee98d2fd
d32c9119 assessment-security DenialOfService: ❌ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ WARNING in aa_policy_destroy 2026/08/21 00:00 2026/08/21 00:00 2026/08/21 00:54 1e72964b
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [apparmor?] WARNING in aa_policy_destroy 0 (1) 2026/08/24 06:07
Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 WARNING in aa_policy_destroy -1 syz, C 26 5d14h 6d23h 0/3 upstream: reported C repro on 2026/08/21 01:18
linux-5.15 WARNING in aa_policy_destroy -1 syz, C 9 5d11h 6d00h 0/3 upstream: reported C repro on 2026/08/22 00:35

Sample crash report:
 </TASK>
------------[ cut here ]------------
AppArmor WARN aa_policy_destroy: (((!list_empty(&policy->profiles) && (&policy->profiles)->prev != ((void *) 0x122 + (0xdead000000000000UL))))): 
WARNING: security/apparmor/lib.c:509 at aa_policy_destroy+0x164/0x1b0 security/apparmor/lib.c:509, CPU#0: syz.0.17/5541
Modules linked in:
CPU: 0 UID: 0 PID: 5541 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:aa_policy_destroy+0x16b/0x1b0 security/apparmor/lib.c:509
Code: 85 ed 7e 4d e8 96 bc 37 fd 5b 41 5c 41 5e 41 5f 5d e9 19 27 4e 07 cc e8 83 bc 37 fd 48 8d 3d 0c f0 d3 0b 48 c7 c6 a4 eb 38 8e <67> 48 0f b9 3a e9 04 ff ff ff e8 66 bc 37 fd 48 8d 3d ff ef d3 0b
RSP: 0018:ffffc9000345eaa0 EFLAGS: 00010293
RAX: ffffffff848f530d RBX: ffff88803f734800 RCX: ffff88801af2a580
RDX: 0000000000000000 RSI: ffffffff8e38eba4 RDI: ffffffff90634320
RBP: 0000000000000000 R08: 0000000000000cc0 R09: 00000000ffffffff
R10: dffffc0000000000 R11: fffffbfff1d95913 R12: dead000000000122
R13: ffff88803f734800 R14: ffff88803f734828 R15: dffffc0000000000
FS:  00007f5f6a1836c0(0000) GS:ffff88808c519000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055d02407b048 CR3: 0000000012aa9000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 aa_free_profile+0x9d/0x9f0 security/apparmor/policy.c:334
 aa_alloc_profile+0x1e4/0x3e0 security/apparmor/policy.c:416
 unpack_profile security/apparmor/policy_unpack.c:1153 [inline]
 aa_unpack+0x17db/0x7430 security/apparmor/policy_unpack.c:1748
 aa_replace_profiles+0x226/0x2a20 security/apparmor/policy.c:1183
 policy_update+0x234/0x4a0 security/apparmor/apparmorfs.c:505
 profile_load+0x1cb/0x320 security/apparmor/apparmorfs.c:522
 vfs_write+0x296/0xba0 fs/read_write.c:685
 ksys_write+0x150/0x270 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5f6939e0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5f6a183028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f5f69625fa0 RCX: 00007f5f6939e0d9
RDX: 0000000000000041 RSI: 0000200000000400 RDI: 0000000000000003
RBP: 00007f5f6a183090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f5f69626038 R14: 00007f5f69625fa0 R15: 00007ffe23725c18
 </TASK>
----------------
Code disassembly (best guess):
   0:	85 ed                	test   %ebp,%ebp
   2:	7e 4d                	jle    0x51
   4:	e8 96 bc 37 fd       	call   0xfd37bc9f
   9:	5b                   	pop    %rbx
   a:	41 5c                	pop    %r12
   c:	41 5e                	pop    %r14
   e:	41 5f                	pop    %r15
  10:	5d                   	pop    %rbp
  11:	e9 19 27 4e 07       	jmp    0x74e272f
  16:	cc                   	int3
  17:	e8 83 bc 37 fd       	call   0xfd37bc9f
  1c:	48 8d 3d 0c f0 d3 0b 	lea    0xbd3f00c(%rip),%rdi        # 0xbd3f02f
  23:	48 c7 c6 a4 eb 38 8e 	mov    $0xffffffff8e38eba4,%rsi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	e9 04 ff ff ff       	jmp    0xffffff38
  34:	e8 66 bc 37 fd       	call   0xfd37bc9f
  39:	48 8d 3d ff ef d3 0b 	lea    0xbd3efff(%rip),%rdi        # 0xbd3f03f

Crashes (86):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/20 22:01 upstream 9d2ed026f031 1e72964b .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in aa_policy_destroy
2026/08/23 03:09 upstream 66fb95a52111 1e72964b .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in aa_policy_destroy
2026/08/24 22:46 linux-next 4b18edbd8e70 23caa175 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in aa_policy_destroy
2026/08/23 03:47 linux-next 903c1cf6dff9 1e72964b .config strace log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in aa_policy_destroy
2026/08/22 01:05 linux-next 903c1cf6dff9 1e72964b .config strace log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in aa_policy_destroy
2026/08/23 18:52 upstream 2709dd5ae32f 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in aa_policy_destroy
2026/08/21 19:36 upstream 818bebeb63dd 1e72964b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in aa_policy_destroy
2026/08/20 22:07 upstream 9d2ed026f031 1e72964b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in aa_policy_destroy
2026/08/20 22:02 upstream 9d2ed026f031 1e72964b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in aa_policy_destroy
2026/08/20 21:59 upstream 9d2ed026f031 1e72964b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in aa_policy_destroy
2026/08/20 21:57 upstream 9d2ed026f031 1e72964b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in aa_policy_destroy
2026/08/20 21:55 upstream 9d2ed026f031 1e72964b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in aa_policy_destroy
2026/08/20 21:55 upstream 9d2ed026f031 1e72964b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in aa_policy_destroy
2026/08/20 21:54 upstream 9d2ed026f031 1e72964b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in aa_policy_destroy
2026/08/20 21:52 upstream 9d2ed026f031 1e72964b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in aa_policy_destroy
2026/08/20 21:16 upstream 9d2ed026f031 1e72964b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in aa_policy_destroy
2026/08/20 21:15 upstream 9d2ed026f031 1e72964b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in aa_policy_destroy
2026/08/20 21:14 upstream 9d2ed026f031 1e72964b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in aa_policy_destroy
2026/08/20 21:13 upstream 9d2ed026f031 1e72964b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in aa_policy_destroy
2026/08/20 21:13 upstream 9d2ed026f031 1e72964b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in aa_policy_destroy
2026/08/20 21:10 upstream 9d2ed026f031 1e72964b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in aa_policy_destroy
2026/08/20 21:09 upstream 9d2ed026f031 1e72964b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in aa_policy_destroy
2026/08/20 21:09 upstream 9d2ed026f031 1e72964b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in aa_policy_destroy
2026/08/20 21:09 upstream 9d2ed026f031 1e72964b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in aa_policy_destroy
2026/08/26 16:38 upstream 45c13f3f9e3b a2b77b9e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in aa_policy_destroy
2026/08/26 07:39 upstream 73ae59e97596 6a91adb4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in aa_policy_destroy
2026/08/21 08:04 upstream 9d2ed026f031 1e72964b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in aa_policy_destroy
2026/08/21 01:00 upstream 9d2ed026f031 1e72964b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in aa_policy_destroy
2026/08/21 00:52 upstream 9d2ed026f031 1e72964b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in aa_policy_destroy
2026/08/21 00:50 upstream 9d2ed026f031 1e72964b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in aa_policy_destroy
2026/08/21 00:49 upstream 9d2ed026f031 1e72964b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in aa_policy_destroy
2026/08/21 00:49 upstream 9d2ed026f031 1e72964b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in aa_policy_destroy
2026/08/21 00:49 upstream 9d2ed026f031 1e72964b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in aa_policy_destroy
2026/08/21 00:47 upstream 9d2ed026f031 1e72964b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in aa_policy_destroy
2026/08/26 01:45 linux-next a8406e6c0b79 614e416a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in aa_policy_destroy
2026/08/25 20:49 linux-next a8406e6c0b79 614e416a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in aa_policy_destroy
2026/08/25 19:06 linux-next a8406e6c0b79 614e416a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in aa_policy_destroy
2026/08/25 19:05 linux-next a8406e6c0b79 614e416a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in aa_policy_destroy
2026/08/25 03:55 linux-next 4b18edbd8e70 23caa175 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in aa_policy_destroy
2026/08/24 22:14 linux-next 4b18edbd8e70 23caa175 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in aa_policy_destroy
2026/08/23 22:44 linux-next 903c1cf6dff9 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in aa_policy_destroy
2026/08/23 02:21 linux-next 903c1cf6dff9 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in aa_policy_destroy
2026/08/23 01:00 linux-next 903c1cf6dff9 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in aa_policy_destroy
2026/08/22 18:55 linux-next 903c1cf6dff9 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in aa_policy_destroy
2026/08/22 00:22 linux-next 903c1cf6dff9 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in aa_policy_destroy
2026/08/21 21:29 linux-next 903c1cf6dff9 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in aa_policy_destroy
2026/08/21 14:45 linux-next 7079a12d7506 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in aa_policy_destroy
2026/08/21 13:42 linux-next 7079a12d7506 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in aa_policy_destroy
2026/08/21 12:38 linux-next 7079a12d7506 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in aa_policy_destroy
2026/08/21 10:58 linux-next 7079a12d7506 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in aa_policy_destroy
2026/08/21 09:14 linux-next 7079a12d7506 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in aa_policy_destroy
2026/08/21 01:12 linux-next 7079a12d7506 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in aa_policy_destroy
2026/08/21 01:11 linux-next 7079a12d7506 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in aa_policy_destroy
2026/08/21 01:07 linux-next 7079a12d7506 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in aa_policy_destroy
* Struck through repros no longer work on HEAD.