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AHgh+RoiAPWSgZcK697oh4esrkkV7y8TkMVNH4pKV3Z/XX6gAKcSKn9uVTYw/8g5udh4x+PIfu7MYz7R5dl8lZHgr7aaaqdZAjc=@vger.kernel.org X-Gm-Message-State: AFuF++mOil/1SIz3Cw2yJad4tvrJHfDZIYXjnrb89Q6rlRLu98jAxxEx QcDniiZmR0eilyWkflzEzx83etd/J0kXlVUtCPrfWEwAZBVPsTX+0fPz/0o0WjArnXgrqmzXiN3 62rFEEi8peGtwZSd8F8Zna8bvwgG5i6bnC7hanpAEX1e2FKqG/TUvGwyQH0o= Precedence: bulk X-Mailing-List: linux-security-module@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:24f:b0:6a3:1dc5:3570 with SMTP id 006d021491bc7-6b15944b2cemr16703682eaf.31.1787551657632; Sun, 23 Aug 2026 23:07:37 -0700 (PDT) Date: Sun, 23 Aug 2026 23:07:37 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a8bdfa9.dbb3a75c.13dd47.0062.GAE@google.com> Subject: [syzbot] [apparmor?] WARNING in aa_policy_destroy From: syzbot To: apparmor@lists.ubuntu.com, georgia.garcia@canonical.com, jmorris@namei.org, john.johansen@canonical.com, john@apparmor.net, linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, paul@paul-moore.com, serge@hallyn.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 9d2ed026f031 Merge tag 'sysctl-7.03-rc1' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17516549580000 kernel config: https://syzkaller.appspot.com/x/.config?x=6e414d6e0a79e71d dashboard link: https://syzkaller.appspot.com/bug?extid=faed97c4ed43bfe7fee5 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16120415580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-9d2ed026.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/89c0c0c0f535/vmlinux-9d2ed026.xz kernel image: https://storage.googleapis.com/syzbot-assets/80d7adeb0e7d/bzImage-9d2ed026.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+faed97c4ed43bfe7fee5@syzkaller.appspotmail.com ------------[ 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: 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 ---------------- 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 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup