==================================================================
BUG: KCSAN: data-race in avc_policy_seqno / avc_ss_reset

write to 0xffffffff896118d0 of 4 bytes by task 1570 on cpu 0:
 avc_latest_notif_update security/selinux/avc.c:581 [inline]
 avc_ss_reset+0x209/0x240 security/selinux/avc.c:970
 selinux_notify_policy_change security/selinux/ss/services.c:2234 [inline]
 security_set_bools+0x311/0x350 security/selinux/ss/services.c:3044
 sel_commit_bools_write+0x1e9/0x270 security/selinux/selinuxfs.c:1220
 do_loop_readv_writev fs/read_write.c:851 [inline]
 vfs_writev+0x420/0x8c0 fs/read_write.c:1060
 do_writev+0xe9/0x210 fs/read_write.c:1104
 __do_sys_writev fs/read_write.c:1172 [inline]
 __se_sys_writev fs/read_write.c:1169 [inline]
 __x64_sys_writev+0x45/0x50 fs/read_write.c:1169
 x64_sys_call+0x23c9/0x2550 arch/x86/include/generated/asm/syscalls_64.h:21
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffffffff896118d0 of 4 bytes by task 1578 on cpu 1:
 avc_policy_seqno+0x15/0x30 security/selinux/avc.c:1206
 task_avdcache_search security/selinux/hooks.c:3190 [inline]
 selinux_inode_permission+0x3af/0x740 security/selinux/hooks.c:3272
 security_inode_permission+0x69/0xa0 security/security.c:1842
 inode_permission+0x1da/0x3b0 fs/namei.c:661
 may_open+0x255/0x350 fs/namei.c:4269
 do_open fs/namei.c:4835 [inline]
 path_openat+0xb1c/0x10d0 fs/namei.c:5000
 do_file_open+0x16c/0x290 fs/namei.c:5029
 do_sys_openat2+0xa0/0x130 fs/open.c:1417
 do_sys_open fs/open.c:1423 [inline]
 __do_sys_openat fs/open.c:1439 [inline]
 __se_sys_openat fs/open.c:1434 [inline]
 __x64_sys_openat+0xf2/0x120 fs/open.c:1434
 x64_sys_call+0x1f72/0x2550 arch/x86/include/generated/asm/syscalls_64.h:258
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000003 -> 0x00000004

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 1578 Comm: syz.5.5452 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
==================================================================
loop5: detected capacity change from 0 to 1024
EXT4-fs (loop5): mounted filesystem 00000000-0000-0006-0000-000000000000 r/w without journal. Quota mode: writeback.
ext4 filesystem being mounted at /20/file1 supports timestamps until 2038-01-19 (0x7fffffff)
EXT4-fs error (device loop5): ext4_map_blocks:832: inode #15: comm syz.5.5452: lblock 0 mapped to illegal pblock 0 (length 1)
EXT4-fs (loop5): Delayed block allocation failed for inode 15 at logical offset 0 with max blocks 1 with error 117
EXT4-fs (loop5): This should not happen!! Data will be lost