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BUG: KASAN: invalid-access in smk_access+0x54/0x148 security/smack/smack_access.c:147
Read at addr fcf000000ee81240 by task syz.1.8118/29962
Pointer tag: [fc], memory tag: [fe]

CPU: 1 UID: 0 PID: 29962 Comm: syz.1.8118 Not tainted 6.11.0-syzkaller-07341-gbaeb9a7d8b60 #0
Hardware name: linux,dummy-virt (DT)
Call trace:
 dump_backtrace+0x94/0xec arch/arm64/kernel/stacktrace.c:319
 show_stack+0x18/0x24 arch/arm64/kernel/stacktrace.c:326
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x78/0x90 lib/dump_stack.c:119
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x108/0x618 mm/kasan/report.c:488
 kasan_report+0x88/0xac mm/kasan/report.c:601
 report_tag_fault arch/arm64/mm/fault.c:332 [inline]
 do_tag_recovery arch/arm64/mm/fault.c:344 [inline]
 __do_kernel_fault+0x170/0x1c8 arch/arm64/mm/fault.c:386
 do_bad_area arch/arm64/mm/fault.c:486 [inline]
 do_tag_check_fault+0x78/0x8c arch/arm64/mm/fault.c:803
 do_mem_abort+0x44/0x94 arch/arm64/mm/fault.c:879
 el1_abort+0x40/0x60 arch/arm64/kernel/entry-common.c:432
 el1h_64_sync_handler+0xd8/0xe4 arch/arm64/kernel/entry-common.c:492
 el1h_64_sync+0x64/0x68 arch/arm64/kernel/entry.S:593
 smk_access+0x54/0x148 security/smack/smack_access.c:147
 smack_watch_key+0xe0/0xf8 security/smack/smack_lsm.c:4656
 security_watch_key+0x58/0x148 security/security.c:4448
 keyctl_watch_key+0xb0/0x1cc security/keys/keyctl.c:1813
 __do_sys_keyctl security/keys/keyctl.c:2021 [inline]
 __se_sys_keyctl security/keys/keyctl.c:1874 [inline]
 __arm64_sys_keyctl+0x50/0x290 security/keys/keyctl.c:1874
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x48/0x110 arch/arm64/kernel/syscall.c:49
 el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:151
 el0_svc+0x34/0xec arch/arm64/kernel/entry-common.c:712
 el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:598

The buggy address belongs to the object at fff000000ee81240
 which belongs to the cache kmalloc-16 of size 16
The buggy address is located 0 bytes inside of
 16-byte region [fff000000ee81240, fff000000ee81250)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xf0f000000ee81f00 pfn:0x4ee81
anon flags: 0x1ffc00000000000(node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0)
page_type: 0xfdffffff(slab)
raw: 01ffc00000000000 faf0000003001400 0000000000000000 dead000000000001
raw: f0f000000ee81f00 00000000810000ef 00000001fdffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 fff000000ee81000: fe fc fe fe fe fe fe fe f1 f5 fe fe fe fe fe fe
 fff000000ee81100: fe fe fd fd fe fe fe fe fe fc f4 fe fe fe f5 fe
>fff000000ee81200: fe fb fc f4 fe fe fe fe fe fe fe fe fe fe fe fb
                               ^
 fff000000ee81300: f2 fb fb fe f8 fb fe fe f9 fe fe fe fe f1 fe fe
 fff000000ee81400: fe fe fe fd f1 f4 fe f8 fe f8 fe f2 fe f8 fe fe
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