WARNING in aa_policy_destroy

Status: upstream: reported C repro on 2026/08/21 01:18
Reported-by: syzbot+d37bf7555eec61df31ea@syzkaller.appspotmail.com
First crash: 7d23h, last: 6d13h
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in aa_policy_destroy apparmor prio:low -1 syz 87 22h09m 4d18h 15/29 upstream: reported syz repro on 2026/08/24 06:07
linux-5.15 WARNING in aa_policy_destroy -1 syz, C 9 6d11h 7d00h 0/3 upstream: reported C repro on 2026/08/22 00:35

Sample crash report:
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
------------[ cut here ]------------
AppArmor WARN aa_policy_destroy: (((!list_empty(&policy->profiles) && (&policy->profiles)->prev != ((void *) 0x122 + (0xdead000000000000UL))))): 
WARNING: CPU: 1 PID: 4520 at security/apparmor/lib.c:537 aa_policy_destroy+0x188/0x1e4 security/apparmor/lib.c:537
Modules linked in:
CPU: 1 PID: 4520 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026
pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : aa_policy_destroy+0x188/0x1e4 security/apparmor/lib.c:537
lr : aa_policy_destroy+0x188/0x1e4 security/apparmor/lib.c:537
sp : ffff8000211872d0
x29: ffff8000211872d0 x28: dfff800000000000 x27: ffff0000d78afd1c
x26: ffff0000d78afd10 x25: ffff0000d78afd10 x24: 0000000000000074
x23: dfff800000000000 x22: ffff0000d91bc028 x21: dead000000000122
x20: dfff800000000000 x19: ffff0000d91bc000 x18: 1fffe00033e7217e
x17: ffff80001539d000 x16: ffff8000082dd264 x15: 0000000040000000
x14: 0000000000000001 x13: 1fffe00033e74870 x12: 0000000000000000
x11: ff0080000a976be0 x10: 0000000000000003 x9 : fbfd2cb7a0ab7300
x8 : fbfd2cb7a0ab7300 x7 : ffff80000825ab50 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000007 x1 : ffff800011cfdc80 x0 : ffff80018a09a000
Call trace:
 aa_policy_destroy+0x188/0x1e4 security/apparmor/lib.c:537
 aa_free_profile+0x6c/0x880 security/apparmor/policy.c:240
 aa_alloc_profile+0x12c/0x278 security/apparmor/policy.c:314
 unpack_profile security/apparmor/policy_unpack.c:705 [inline]
 aa_unpack+0xdbc/0x3864 security/apparmor/policy_unpack.c:1220
 aa_replace_profiles+0x1ac/0x249c security/apparmor/policy.c:971
 policy_update+0xe0/0x1ac security/apparmor/apparmorfs.c:510
 profile_replace+0x198/0x304 security/apparmor/apparmorfs.c:545
 vfs_write+0x2a8/0x7c8 fs/read_write.c:582
 ksys_write+0x12c/0x228 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:646
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
irq event stamp: 1910
hardirqs last  enabled at (1909): [<ffff80000825abe4>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1374 [inline]
hardirqs last  enabled at (1909): [<ffff80000825abe4>] finish_lock_switch+0xb0/0x1c8 kernel/sched/core.c:5005
hardirqs last disabled at (1910): [<ffff800011b98ef4>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (1884): [<ffff8000081ae3bc>] softirq_handle_end kernel/softirq.c:439 [inline]
softirqs last  enabled at (1884): [<ffff8000081ae3bc>] handle_softirqs+0xb1c/0xc90 kernel/softirq.c:624
softirqs last disabled at (1875): [<ffff800008020e6c>] __do_softirq+0x14/0x20 kernel/softirq.c:630
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
AppArmor WARN aa_policy_destroy: (((!list_empty(&policy->list) && (&policy->list)->prev != ((void *) 0x122 + (0xdead000000000000UL))))): 
WARNING: CPU: 1 PID: 4520 at security/apparmor/lib.c:538 aa_policy_destroy+0x1a8/0x1e4 security/apparmor/lib.c:538
Modules linked in:
CPU: 1 PID: 4520 Comm: syz.0.17 Tainted: G        W          syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026
pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : aa_policy_destroy+0x1a8/0x1e4 security/apparmor/lib.c:538
lr : aa_policy_destroy+0x1a8/0x1e4 security/apparmor/lib.c:538
sp : ffff8000211872d0
x29: ffff8000211872d0 x28: dfff800000000000 x27: ffff0000d78afd1c
x26: ffff0000d78afd10 x25: ffff0000d78afd10 x24: 0000000000000074
x23: dfff800000000000 x22: ffff0000d91bc018 x21: dead000000000122
x20: dfff800000000000 x19: ffff0000d91bc000 x18: 1fffe00033e7217e
x17: 6f762828203d2120 x16: ffff800011b9ccb8 x15: 73696c3e2d796369
x14: 0000000000000001 x13: 1fffe00033e721a3 x12: 0000000000000000
x11: ff00800008195f70 x10: 0000000000000000 x9 : fbfd2cb7a0ab7300
x8 : fbfd2cb7a0ab7300 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff800021186d58 x4 : ffff800015484e80 x3 : ffff800008540a1c
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000000
Call trace:
 aa_policy_destroy+0x1a8/0x1e4 security/apparmor/lib.c:538
 aa_free_profile+0x6c/0x880 security/apparmor/policy.c:240
 aa_alloc_profile+0x12c/0x278 security/apparmor/policy.c:314
 unpack_profile security/apparmor/policy_unpack.c:705 [inline]
 aa_unpack+0xdbc/0x3864 security/apparmor/policy_unpack.c:1220
 aa_replace_profiles+0x1ac/0x249c security/apparmor/policy.c:971
 policy_update+0xe0/0x1ac security/apparmor/apparmorfs.c:510
 profile_replace+0x198/0x304 security/apparmor/apparmorfs.c:545
 vfs_write+0x2a8/0x7c8 fs/read_write.c:582
 ksys_write+0x12c/0x228 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:646
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
irq event stamp: 2010
hardirqs last  enabled at (2009): [<ffff8000083138a8>] __up_console_sem+0xb4/0xfc kernel/printk/printk.c:261
hardirqs last disabled at (2010): [<ffff800011b98ef4>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (1988): [<ffff8000081ae3bc>] softirq_handle_end kernel/softirq.c:439 [inline]
softirqs last  enabled at (1988): [<ffff8000081ae3bc>] handle_softirqs+0xb1c/0xc90 kernel/softirq.c:624
softirqs last disabled at (1913): [<ffff800008020e6c>] __do_softirq+0x14/0x20 kernel/softirq.c:630
---[ end trace 0000000000000000 ]---

Crashes (26):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/21 02:18 linux-6.1.y 7e6e67054721 1e72964b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in aa_policy_destroy
2026/08/21 01:48 linux-6.1.y 7e6e67054721 1e72964b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in aa_policy_destroy
2026/08/22 10:58 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in aa_policy_destroy
2026/08/22 09:27 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in aa_policy_destroy
2026/08/22 05:22 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in aa_policy_destroy
2026/08/22 04:22 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in aa_policy_destroy
2026/08/22 00:06 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in aa_policy_destroy
2026/08/21 18:07 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in aa_policy_destroy
2026/08/21 18:06 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in aa_policy_destroy
2026/08/21 18:03 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in aa_policy_destroy
2026/08/21 17:05 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in aa_policy_destroy
2026/08/21 17:02 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in aa_policy_destroy
2026/08/21 15:01 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in aa_policy_destroy
2026/08/21 12:50 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in aa_policy_destroy
2026/08/21 12:45 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in aa_policy_destroy
2026/08/21 02:38 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in aa_policy_destroy
2026/08/21 02:33 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in aa_policy_destroy
2026/08/21 02:33 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in aa_policy_destroy
2026/08/21 02:31 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in aa_policy_destroy
2026/08/21 02:31 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in aa_policy_destroy
2026/08/21 02:29 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in aa_policy_destroy
2026/08/21 02:29 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in aa_policy_destroy
2026/08/21 02:28 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in aa_policy_destroy
2026/08/21 02:28 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in aa_policy_destroy
2026/08/21 01:19 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in aa_policy_destroy
2026/08/21 01:18 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in aa_policy_destroy
* Struck through repros no longer work on HEAD.