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BUG: KCSAN: data-race in ksys_read / ksys_read

write to 0xffff8881046e9268 of 8 bytes by task 20418 on cpu 0:
 ksys_read+0x10c/0x190 fs/read_write.c:622
 __do_sys_read fs/read_write.c:630 [inline]
 __se_sys_read fs/read_write.c:628 [inline]
 __x64_sys_read+0x3e/0x50 fs/read_write.c:628
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff8881046e9268 of 8 bytes by task 20420 on cpu 1:
 ksys_read+0x9c/0x190 fs/read_write.c:617
 __do_sys_read fs/read_write.c:630 [inline]
 __se_sys_read fs/read_write.c:628 [inline]
 __x64_sys_read+0x3e/0x50 fs/read_write.c:628
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x000000000000016d -> 0x0000000000000262

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 20420 Comm: syz-executor.5 Not tainted 5.17.0-syzkaller-02003-g3bf03b9a0839-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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