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BUG: KCSAN: data-race in do_settimeofday64 / ktime_get_real_seconds

write to 0xffffffff882f98f8 of 8 bytes by task 26928 on cpu 1:
 tk_set_xtime kernel/time/timekeeping.c:138 [inline]
 do_settimeofday64+0x3cb/0x550 kernel/time/timekeeping.c:1323
 __do_sys_stime32 kernel/time/time.c:133 [inline]
 __se_sys_stime32 kernel/time/time.c:119 [inline]
 __ia32_sys_stime32+0x89/0xc0 kernel/time/time.c:119
 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline]
 do_int80_syscall_32+0x38/0x50 arch/x86/entry/common.c:95
 entry_INT80_compat+0x71/0x76 arch/x86/entry/entry_64_compat.S:411

read to 0xffffffff882f98f8 of 8 bytes by task 26927 on cpu 0:
 ktime_get_real_seconds+0x11/0x20 kernel/time/timekeeping.c:1013
 recently_deleted fs/ext4/ialloc.c:703 [inline]
 find_inode_bit+0x231/0x3a0 fs/ext4/ialloc.c:728
 __ext4_new_inode+0xd24/0x3070 fs/ext4/ialloc.c:1062
 ext4_symlink+0x2bc/0x770 fs/ext4/namei.c:3341
 vfs_symlink+0x216/0x2d0 fs/namei.c:3960
 do_symlinkat+0xee/0x280 fs/namei.c:3987
 __do_sys_symlink fs/namei.c:4006 [inline]
 __se_sys_symlink fs/namei.c:4004 [inline]
 __x64_sys_symlink+0x32/0x40 fs/namei.c:4004
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 26927 Comm: syz-executor.0 Not tainted 5.10.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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