syzbot

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BUG: KCSAN: data-race in selinux_inode_permission / selinux_inode_permission

read to 0xffff88811981fe20 of 4 bytes by task 25830 on cpu 0:
 task_avdcache_search security/selinux/hooks.c:3146 [inline]
 selinux_inode_permission+0x334/0x740 security/selinux/hooks.c:3225
 security_inode_permission+0x6d/0xb0 security/security.c:2363
 inode_permission+0x106/0x310 fs/namei.c:601
 may_lookup fs/namei.c:1858 [inline]
 link_path_walk+0x162/0x900 fs/namei.c:2467
 path_openat+0x1de/0x2170 fs/namei.c:4130
 do_filp_open+0x109/0x230 fs/namei.c:4161
 do_sys_openat2+0xa6/0x110 fs/open.c:1437
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_openat fs/open.c:1468 [inline]
 __se_sys_openat fs/open.c:1463 [inline]
 __x64_sys_openat+0xf2/0x120 fs/open.c:1463
 x64_sys_call+0x2eab/0x3000 arch/x86/include/generated/asm/syscalls_64.h:258
 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-write to 0xffff88811981fe20 of 4 bytes by task 25833 on cpu 1:
 task_avdcache_update security/selinux/hooks.c:3183 [inline]
 selinux_inode_permission+0x56a/0x740 security/selinux/hooks.c:3242
 security_inode_permission+0x6d/0xb0 security/security.c:2363
 inode_permission+0x106/0x310 fs/namei.c:601
 may_lookup fs/namei.c:1858 [inline]
 link_path_walk+0x162/0x900 fs/namei.c:2467
 path_openat+0x1de/0x2170 fs/namei.c:4130
 do_filp_open+0x109/0x230 fs/namei.c:4161
 do_sys_openat2+0xa6/0x110 fs/open.c:1437
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_openat fs/open.c:1468 [inline]
 __se_sys_openat fs/open.c:1463 [inline]
 __x64_sys_openat+0xf2/0x120 fs/open.c:1463
 x64_sys_call+0x2eab/0x3000 arch/x86/include/generated/asm/syscalls_64.h:258
 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

value changed: 0x00000000 -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 25833 Comm: syz.9.8457 Tainted: G        W           syzkaller #0 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
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