================================================================== BUG: KCSAN: data-race in __fsnotify_parent / vfs_rename read-write to 0xffff88810fdc99c0 of 4 bytes by task 13524 on cpu 1: dont_mount include/linux/dcache.h:354 [inline] vfs_rename+0xcd9/0xe20 fs/namei.c:4320 do_renameat2+0x56c/0x930 fs/namei.c:4457 __do_sys_rename fs/namei.c:4503 [inline] __se_sys_rename fs/namei.c:4501 [inline] __x64_sys_rename+0x3a/0x40 fs/namei.c:4501 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88810fdc99c0 of 4 bytes by task 12868 on cpu 0: __fsnotify_parent+0x7d/0x430 fs/notify/fsnotify.c:180 fsnotify_parent include/linux/fsnotify.h:68 [inline] fsnotify_file include/linux/fsnotify.h:90 [inline] fsnotify_access include/linux/fsnotify.h:247 [inline] vfs_read+0x364/0x5c0 fs/read_write.c:500 ksys_read+0xce/0x180 fs/read_write.c:634 __do_sys_read fs/read_write.c:644 [inline] __se_sys_read fs/read_write.c:642 [inline] __x64_sys_read+0x3e/0x50 fs/read_write.c:642 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: 12868 Comm: systemd-udevd Not tainted 5.10.0-rc6-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: 12868 Comm: systemd-udevd Not tainted 5.10.0-rc6-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+0x116/0x15d lib/dump_stack.c:118 panic+0x1e7/0x5fa kernel/panic.c:231 kcsan_report+0x67b/0x680 kernel/kcsan/report.c:634 kcsan_setup_watchpoint+0x46a/0x4d0 kernel/kcsan/core.c:568 __fsnotify_parent+0x7d/0x430 fs/notify/fsnotify.c:180 fsnotify_parent include/linux/fsnotify.h:68 [inline] fsnotify_file include/linux/fsnotify.h:90 [inline] fsnotify_access include/linux/fsnotify.h:247 [inline] vfs_read+0x364/0x5c0 fs/read_write.c:500 ksys_read+0xce/0x180 fs/read_write.c:634 __do_sys_read fs/read_write.c:644 [inline] __se_sys_read fs/read_write.c:642 [inline] __x64_sys_read+0x3e/0x50 fs/read_write.c:642 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f0325c56910 Code: b6 fe ff ff 48 8d 3d 0f be 08 00 48 83 ec 08 e8 06 db 01 00 66 0f 1f 44 00 00 83 3d f9 2d 2c 00 00 75 10 b8 00 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 de 9b 01 00 48 89 04 24 RSP: 002b:00007ffcc8057cd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 000055f87561c0c0 RCX: 00007f0325c56910 RDX: 0000000000001000 RSI: 000055f87560e9b0 RDI: 000000000000000f RBP: 0000000000000d68 R08: 00007f0325f151a8 R09: 0000000000001010 R10: 0000000000000020 R11: 0000000000000246 R12: 00007f0325f11440 R13: 00007f0325f10900 R14: 000055f87561ec20 R15: 00007f0325f10900 Kernel Offset: disabled Rebooting in 86400 seconds..