syzbot

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BUG: KCSAN: data-race in inode_doinit_with_dentry / inode_doinit_with_dentry

write to 0xffff8881050b645a of 1 bytes by task 17392 on cpu 0:
 inode_doinit_with_dentry+0x286/0x7a0 security/selinux/hooks.c:1453
 __inode_security_revalidate security/selinux/hooks.c:296 [inline]
 inode_security security/selinux/hooks.c:330 [inline]
 selinux_file_open+0xe6/0x330 security/selinux/hooks.c:4099
 security_file_open+0x36/0x70 security/security.c:3114
 do_dentry_open+0x204/0xa20 fs/open.c:941
 vfs_open+0x37/0x1e0 fs/open.c:1094
 dentry_open+0x4a/0x90 fs/open.c:1117
 pidfs_alloc_file+0x132/0x200 fs/pidfs.c:929
 pidfd_prepare+0xc9/0x130 kernel/fork.c:1844
 pidfd_create kernel/pid.c:623 [inline]
 __do_sys_pidfd_open kernel/pid.c:659 [inline]
 __se_sys_pidfd_open+0x133/0x280 kernel/pid.c:644
 __x64_sys_pidfd_open+0x31/0x40 kernel/pid.c:644
 x64_sys_call+0x2a5f/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:435
 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 0xffff8881050b645a of 1 bytes by task 17391 on cpu 1:
 inode_doinit_with_dentry+0x75/0x7a0 security/selinux/hooks.c:1428
 __inode_security_revalidate security/selinux/hooks.c:296 [inline]
 inode_security security/selinux/hooks.c:330 [inline]
 selinux_file_open+0xe6/0x330 security/selinux/hooks.c:4099
 security_file_open+0x36/0x70 security/security.c:3114
 do_dentry_open+0x204/0xa20 fs/open.c:941
 vfs_open+0x37/0x1e0 fs/open.c:1094
 dentry_open+0x4a/0x90 fs/open.c:1117
 pidfs_alloc_file+0x132/0x200 fs/pidfs.c:929
 pidfd_prepare+0xc9/0x130 kernel/fork.c:1844
 pidfd_create kernel/pid.c:623 [inline]
 __do_sys_pidfd_open kernel/pid.c:659 [inline]
 __se_sys_pidfd_open+0x133/0x280 kernel/pid.c:644
 __x64_sys_pidfd_open+0x31/0x40 kernel/pid.c:644
 x64_sys_call+0x2a5f/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:435
 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: 0x00 -> 0x01

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 17391 Comm: syz.2.3964 Tainted: G        W           6.16.0-rc3-syzkaller-00190-g67a993863163 #0 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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