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BUG: KASAN: slab-out-of-bounds in walk_stackframe+0x11c/0x260 arch/riscv/kernel/stacktrace.c:57
Read of size 8 at addr ffffaf800a1a7f10 by task syz-executor.0/2041

CPU: 0 PID: 2041 Comm: syz-executor.0 Not tainted 5.17.0-rc1-syzkaller-00002-g0966d385830d #0
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff8000a228>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:113
[<ffffffff831668cc>] show_stack+0x34/0x40 arch/riscv/kernel/stacktrace.c:119
[<ffffffff831756ba>] __dump_stack lib/dump_stack.c:88 [inline]
[<ffffffff831756ba>] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:106
[<ffffffff8047479e>] print_address_description.constprop.0+0x2a/0x330 mm/kasan/report.c:255
[<ffffffff80474d4c>] __kasan_report mm/kasan/report.c:442 [inline]
[<ffffffff80474d4c>] kasan_report+0x184/0x1e0 mm/kasan/report.c:459
[<ffffffff80475b20>] check_region_inline mm/kasan/generic.c:183 [inline]
[<ffffffff80475b20>] __asan_load8+0x6e/0x96 mm/kasan/generic.c:256
[<ffffffff8000a052>] walk_stackframe+0x11c/0x260 arch/riscv/kernel/stacktrace.c:57
[<ffffffff8000a4a4>] arch_stack_walk+0x2c/0x3c arch/riscv/kernel/stacktrace.c:146
[<ffffffff80162ac8>] stack_trace_save+0xa6/0xd8 kernel/stacktrace.c:122

Allocated by task 1:
(stack is not available)

Last potentially related work creation:
 stack_trace_save+0xa6/0xd8 kernel/stacktrace.c:122
 kasan_save_stack+0x2c/0x58 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:436 [inline]
 ____kasan_kmalloc mm/kasan/common.c:515 [inline]
 ____kasan_kmalloc mm/kasan/common.c:474 [inline]
 __kasan_kmalloc+0x80/0xb2 mm/kasan/common.c:524
 kasan_kmalloc include/linux/kasan.h:270 [inline]
 __kmalloc+0x190/0x318 mm/slub.c:4424
 kmalloc include/linux/slab.h:586 [inline]
 aa_str_alloc+0x26/0x64 security/apparmor/lib.c:139
 aa_policy_init+0x15a/0x178 security/apparmor/lib.c:499
 alloc_ns+0xae/0x46c security/apparmor/policy_ns.c:95
 aa_alloc_root_ns+0x24/0x46 security/apparmor/policy_ns.c:392
 apparmor_init+0x9e/0x47e security/apparmor/lsm.c:1848
 initialize_lsm+0xac/0xfc security/security.c:237
 ordered_lsm_init security/security.c:361 [inline]
 security_init+0x510/0x53e security/security.c:407
 start_kernel+0x60a/0x698 init/main.c:1117

The buggy address belongs to the object at ffffaf800a1a72c0
 which belongs to the cache signal_cache of size 1544
The buggy address is located 1608 bytes to the right of
 1544-byte region [ffffaf800a1a72c0, ffffaf800a1a78c8)
The buggy address belongs to the page:
page:ffffaf807a920500 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffffaf800a1a4a40 pfn:0x8a3a0
head:ffffaf807a920500 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x8800010200(slab|head|section=17|node=0|zone=0)
raw: 0000008800010200 ffffaf807a909408 ffffaf807a903e88 ffffaf800723ec80
raw: ffffaf800a1a4a40 0000000000120002 00000001ffffffff 0000000000000000
raw: 00000000000007ff
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 7, ts 26408213100, free_ts 0
 __set_page_owner+0x48/0x136 mm/page_owner.c:183
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0xd0/0x10a mm/page_alloc.c:2427
 prep_new_page mm/page_alloc.c:2434 [inline]
 get_page_from_freelist+0x8da/0x12d8 mm/page_alloc.c:4165
 __alloc_pages+0x150/0x3b6 mm/page_alloc.c:5389
 alloc_pages+0x132/0x2a6 mm/mempolicy.c:2271
 alloc_slab_page.constprop.0+0xc2/0xfa mm/slub.c:1799
 allocate_slab mm/slub.c:1944 [inline]
 new_slab+0x25a/0x2cc mm/slub.c:2004
 ___slab_alloc+0x56e/0x918 mm/slub.c:3018
 __slab_alloc.constprop.0+0x50/0x8c mm/slub.c:3105
 slab_alloc_node mm/slub.c:3196 [inline]
 slab_alloc mm/slub.c:3238 [inline]
 kmem_cache_alloc+0x39c/0x3de mm/slub.c:3243
 kmem_cache_zalloc include/linux/slab.h:705 [inline]
 copy_signal kernel/fork.c:1616 [inline]
 copy_process+0x15a8/0x3c34 kernel/fork.c:2161
 kernel_clone+0xee/0x920 kernel/fork.c:2555
 kernel_thread+0xf8/0x130 kernel/fork.c:2607
 call_usermodehelper_exec_work kernel/umh.c:174 [inline]
 call_usermodehelper_exec_work+0xc8/0x122 kernel/umh.c:160
 process_one_work+0x654/0xffe kernel/workqueue.c:2307
 worker_thread+0x360/0x8fa kernel/workqueue.c:2454
page_owner free stack trace missing

Memory state around the buggy address:
 ffffaf800a1a7e00: 00 00 00 00 fc fc fc fc 00 00 00 00 00 00 00 00
 ffffaf800a1a7e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffffaf800a1a7f00: fc fc fc fc fc fc fc fc fc fc fc fc f1 f1 f1 f1
                         ^
 ffffaf800a1a7f80: 00 00 00 f3 f3 f3 f3 f3 00 00 00 00 fc fc fc fc
 ffffaf800a1a8000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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