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BUG: KCSAN: data-race in avc_policy_seqno / avc_ss_reset

write to 0xffffffff893d02c0 of 4 bytes by task 23619 on cpu 0:
 avc_latest_notif_update security/selinux/avc.c:582 [inline]
 avc_ss_reset+0x20c/0x240 security/selinux/avc.c:971
 selinux_notify_policy_change security/selinux/ss/services.c:2231 [inline]
 security_set_bools+0x300/0x340 security/selinux/ss/services.c:3041
 sel_commit_bools_write+0x1e9/0x270 security/selinux/selinuxfs.c:1222
 do_loop_readv_writev fs/read_write.c:852 [inline]
 vfs_writev+0x42b/0x900 fs/read_write.c:1061
 do_writev+0xe9/0x210 fs/read_write.c:1105
 __do_sys_writev fs/read_write.c:1173 [inline]
 __se_sys_writev fs/read_write.c:1170 [inline]
 __x64_sys_writev+0x45/0x50 fs/read_write.c:1170
 x64_sys_call+0x1c0c/0x3020 arch/x86/include/generated/asm/syscalls_64.h:21
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x12c/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffffffff893d02c0 of 4 bytes by task 16587 on cpu 1:
 avc_policy_seqno+0x15/0x30 security/selinux/avc.c:1207
 selinux_file_permission+0x1ca/0x320 security/selinux/hooks.c:3830
 security_file_permission+0x3a/0x70 security/security.c:2392
 iterate_dir+0x57/0x330 fs/readdir.c:95
 __do_sys_getdents64 fs/readdir.c:399 [inline]
 __se_sys_getdents64+0xd2/0x230 fs/readdir.c:384
 __x64_sys_getdents64+0x43/0x50 fs/readdir.c:384
 x64_sys_call+0x2408/0x3020 arch/x86/include/generated/asm/syscalls_64.h:218
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x12c/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000005 -> 0x00000006

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 16587 Comm: udevd Tainted: G        W           syzkaller #0 PREEMPT(full) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
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