syzbot

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BUG: KCSAN: data-race in key_task_permission / keyctl_chown_key

write to 0xffff88814b4b6b68 of 4 bytes by task 17395 on cpu 0:
 keyctl_chown_key+0x53d/0x5b0 security/keys/keyctl.c:1040
 __do_sys_keyctl security/keys/keyctl.c:1921 [inline]
 __se_sys_keyctl+0x112/0xbc0 security/keys/keyctl.c:1874
 __x64_sys_keyctl+0x67/0x80 security/keys/keyctl.c:1874
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff88814b4b6b68 of 4 bytes by task 17389 on cpu 1:
 key_task_permission+0x11f/0x2b0 security/keys/permission.c:54
 lookup_user_key+0x9e7/0xde0 security/keys/process_keys.c:803
 keyctl_setperm_key security/keys/keyctl.c:1082 [inline]
 __do_sys_keyctl security/keys/keyctl.c:1926 [inline]
 __se_sys_keyctl+0x83e/0xbc0 security/keys/keyctl.c:1874
 __x64_sys_keyctl+0x67/0x80 security/keys/keyctl.c:1874
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00000000 -> 0x0000ee01

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 17389 Comm: syz-executor.1 Not tainted 6.6.0-rc6-syzkaller-00182-gce55c22ec8b2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
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