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BUG: KCSAN: data-race in ns_capable_common / task_dump_owner

read to 0xffff8880a531b024 of 4 bytes by task 21557 on cpu 1:
 task_dump_owner+0x43/0x260 fs/proc/base.c:1698
 pid_update_inode+0x3c/0x70 fs/proc/base.c:1818
 pid_revalidate+0x91/0x120 fs/proc/base.c:1841
 d_revalidate fs/namei.c:758 [inline]
 d_revalidate fs/namei.c:755 [inline]
 lookup_fast+0x6ac/0x6c0 fs/namei.c:1613
 walk_component+0x6d/0xd90 fs/namei.c:1798
 link_path_walk.part.0+0x5d3/0xa90 fs/namei.c:2128
 link_path_walk fs/namei.c:2059 [inline]
 path_openat+0x14f/0x3580 fs/namei.c:3536
 do_filp_open+0x11e/0x1b0 fs/namei.c:3567
 do_sys_open+0x3b3/0x4f0 fs/open.c:1097
 __do_sys_open fs/open.c:1115 [inline]
 __se_sys_open fs/open.c:1110 [inline]
 __x64_sys_open+0x55/0x70 fs/open.c:1110
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

write to 0xffff8880a531b024 of 4 bytes by task 20792 on cpu 0:
 ns_capable_common+0x9f/0xc0 kernel/capability.c:377
 ns_capable+0x29/0x40 kernel/capability.c:396
 do_ebt_get_ctl+0x61/0x440 net/bridge/netfilter/ebtables.c:1487
 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline]
 nf_getsockopt+0x71/0xb0 net/netfilter/nf_sockopt.c:122
 ip_getsockopt net/ipv4/ip_sockglue.c:1576 [inline]
 ip_getsockopt+0x118/0x160 net/ipv4/ip_sockglue.c:1556
 tcp_getsockopt net/ipv4/tcp.c:3692 [inline]
 tcp_getsockopt+0x7c/0xc0 net/ipv4/tcp.c:3686
 sock_common_getsockopt+0x67/0x90 net/core/sock.c:3108
 __sys_getsockopt+0xf1/0x210 net/socket.c:2162
 __do_sys_getsockopt net/socket.c:2177 [inline]
 __se_sys_getsockopt net/socket.c:2174 [inline]
 __x64_sys_getsockopt+0x70/0x90 net/socket.c:2174
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 20792 Comm: syz-executor.2 Not tainted 5.5.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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