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BUG: KCSAN: data-race in do_nanosleep / task_dump_owner

write to 0xffff88811f910024 of 4 bytes by task 14348 on cpu 1:
 freezer_count include/linux/freezer.h:121 [inline]
 freezable_schedule include/linux/freezer.h:173 [inline]
 do_nanosleep+0x14d/0x320 kernel/time/hrtimer.c:1874
 hrtimer_nanosleep+0x12f/0x230 kernel/time/hrtimer.c:1927
 __do_sys_nanosleep kernel/time/hrtimer.c:1961 [inline]
 __se_sys_nanosleep kernel/time/hrtimer.c:1948 [inline]
 __x64_sys_nanosleep+0x14e/0x1a0 kernel/time/hrtimer.c:1948
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff88811f910024 of 4 bytes by task 23784 on cpu 0:
 task_dump_owner+0x43/0x260 fs/proc/base.c:1789
 pid_update_inode+0x3c/0x70 fs/proc/base.c:1909
 pid_revalidate+0x91/0x120 fs/proc/base.c:1932
 d_revalidate fs/namei.c:766 [inline]
 d_revalidate fs/namei.c:763 [inline]
 lookup_fast+0x6ac/0x6c0 fs/namei.c:1707
 walk_component+0x6f/0x9c0 fs/namei.c:1911
 link_path_walk.part.0+0x5ef/0xab0 fs/namei.c:2241
 link_path_walk fs/namei.c:2172 [inline]
 path_openat+0x150/0x3150 fs/namei.c:3606
 do_filp_open+0x11e/0x1b0 fs/namei.c:3637
 do_sys_openat2+0x4f5/0x620 fs/open.c:1149
 do_sys_open+0xa3/0x110 fs/open.c:1165
 ksys_open include/linux/syscalls.h:1386 [inline]
 __do_sys_open fs/open.c:1171 [inline]
 __se_sys_open fs/open.c:1169 [inline]
 __x64_sys_open+0x55/0x70 fs/open.c:1169
 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: 23784 Comm: ps Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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