================================================================== BUG: KCSAN: data-race in __fsnotify_parent / vfs_unlink write to 0xffff8881104d19c0 of 4 bytes by task 8704 on cpu 1: dont_mount include/linux/dcache.h:354 [inline] vfs_unlink+0x271/0x3c0 fs/namei.c:3834 do_unlinkat+0x28a/0x4d0 fs/namei.c:3896 __do_sys_unlink fs/namei.c:3942 [inline] __se_sys_unlink fs/namei.c:3940 [inline] __x64_sys_unlink+0x2c/0x30 fs/namei.c:3940 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff8881104d19c0 of 4 bytes by task 24015 on cpu 0: __fsnotify_parent+0x79/0x470 fs/notify/fsnotify.c:180 fsnotify_parent include/linux/fsnotify.h:68 [inline] fsnotify_file include/linux/fsnotify.h:90 [inline] fsnotify_open include/linux/fsnotify.h:268 [inline] do_sys_openat2+0x492/0x500 fs/open.c:1173 do_sys_open fs/open.c:1184 [inline] __do_sys_creat fs/open.c:1258 [inline] __se_sys_creat fs/open.c:1252 [inline] __x64_sys_creat+0x62/0x80 fs/open.c:1252 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: 24015 Comm: syz-executor.0 Not tainted 5.9.0-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: 0 PID: 24015 Comm: syz-executor.0 Not tainted 5.9.0-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+0x207/0x64a kernel/panic.c:231 kcsan_report+0x684/0x690 kernel/kcsan/report.c:634 kcsan_setup_watchpoint+0x4b9/0x540 kernel/kcsan/core.c:568 __fsnotify_parent+0x79/0x470 fs/notify/fsnotify.c:180 fsnotify_parent include/linux/fsnotify.h:68 [inline] fsnotify_file include/linux/fsnotify.h:90 [inline] fsnotify_open include/linux/fsnotify.h:268 [inline] do_sys_openat2+0x492/0x500 fs/open.c:1173 do_sys_open fs/open.c:1184 [inline] __do_sys_creat fs/open.c:1258 [inline] __se_sys_creat fs/open.c:1252 [inline] __x64_sys_creat+0x62/0x80 fs/open.c:1252 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45de59 Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f3450673c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 0000000000002980 RCX: 000000000045de59 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000080 RBP: 000000000118c000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bfd4 R13: 00007ffe540966bf R14: 00007f34506749c0 R15: 000000000118bfd4 Kernel Offset: disabled Rebooting in 86400 seconds..