syzbot

process 'syz.0.57' launched '/dev/fd/12' with NULL argv: empty string added
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BUG: KCSAN: data-race in lookup_user_key / prepare_creds

write to 0xffff88810212b0a8 of 4 bytes by task 3778 on cpu 1:
 get_cred_many include/linux/cred.h:202 [inline]
 get_cred include/linux/cred.h:218 [inline]
 lookup_user_key+0xb6/0xd10 security/keys/process_keys.c:626
 keyctl_keyring_unlink+0x23/0x120 security/keys/keyctl.c:558
 __do_sys_keyctl security/keys/keyctl.c:1906 [inline]
 __se_sys_keyctl+0x5a3/0xb80 security/keys/keyctl.c:1874
 __x64_sys_keyctl+0x67/0x80 security/keys/keyctl.c:1874
 x64_sys_call+0x2f6d/0x2ff0 arch/x86/include/generated/asm/syscalls_64.h:251
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff88810212b000 of 184 bytes by task 3766 on cpu 0:
 prepare_creds+0x6c/0x4c0 kernel/cred.c:219
 prepare_exec_creds+0x14/0xe0 kernel/cred.c:261
 prepare_bprm_creds fs/exec.c:1364 [inline]
 bprm_execve+0x70/0x970 fs/exec.c:1734
 do_execveat_common+0x6e6/0x750 fs/exec.c:1860
 do_execveat fs/exec.c:1945 [inline]
 __do_sys_execveat fs/exec.c:2019 [inline]
 __se_sys_execveat fs/exec.c:2013 [inline]
 __x64_sys_execveat+0x73/0x90 fs/exec.c:2013
 x64_sys_call+0x1fec/0x2ff0 arch/x86/include/generated/asm/syscalls_64.h:323
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 3766 Comm: syz.0.57 Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
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