==================================================================
BUG: KCSAN: data-race in fsnotify_parent / vfs_rename

write to 0xffff8880b62d2300 of 4 bytes by task 558 on cpu 0:
 dont_mount include/linux/dcache.h:354 [inline]
 vfs_rename+0x970/0xba0 fs/namei.c:4313
 do_renameat2+0x554/0x930 fs/namei.c:4450
 __do_sys_rename fs/namei.c:4496 [inline]
 __se_sys_rename fs/namei.c:4494 [inline]
 __x64_sys_rename+0x3a/0x40 fs/namei.c:4494
 do_syscall_64+0x71/0x120 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff8880b62d2300 of 4 bytes by task 1 on cpu 1:
 fsnotify_parent+0x36/0x180 fs/notify/fsnotify.c:153
 fsnotify_file include/linux/fsnotify.h:74 [inline]
 fsnotify_access include/linux/fsnotify.h:249 [inline]
 vfs_read+0x1d3/0x2a0 fs/read_write.c:464
 ksys_read+0xce/0x180 fs/read_write.c:588
 __do_sys_read fs/read_write.c:598 [inline]
 __se_sys_read fs/read_write.c:596 [inline]
 __x64_sys_read+0x3e/0x50 fs/read_write.c:596
 do_syscall_64+0x71/0x120 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 1 Comm: systemd Not tainted 5.8.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 1 Comm: systemd Not tainted 5.8.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x10f/0x19d lib/dump_stack.c:118
 panic+0x1f8/0x63a kernel/panic.c:231
 kcsan_report+0x684/0x690 kernel/kcsan/report.c:626
 kcsan_setup_watchpoint+0x453/0x4d0 kernel/kcsan/core.c:519
 fsnotify_parent+0x36/0x180 fs/notify/fsnotify.c:153
 fsnotify_file include/linux/fsnotify.h:74 [inline]
 fsnotify_access include/linux/fsnotify.h:249 [inline]
 vfs_read+0x1d3/0x2a0 fs/read_write.c:464
 ksys_read+0xce/0x180 fs/read_write.c:588
 __do_sys_read fs/read_write.c:598 [inline]
 __se_sys_read fs/read_write.c:596 [inline]
 __x64_sys_read+0x3e/0x50 fs/read_write.c:596
 do_syscall_64+0x71/0x120 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f4e201a592d
Code: Bad RIP value.
RSP: 002b:00007ffe83de4e20 EFLAGS: 00000293 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00005559b6283080 RCX: 00007f4e201a592d
RDX: 0000000000001000 RSI: 00005559b628d010 RDI: 0000000000000013
RBP: 0000000000000d68 R08: 00007f4e20464178 R09: 0000000000001010
R10: 0000000000000020 R11: 0000000000000293 R12: 00007f4e20460440
R13: 00007f4e2045f900 R14: 00005559b626c710 R15: 00007f4e2045f900
Kernel Offset: disabled
Rebooting in 86400 seconds..