================================================================== BUG: KCSAN: data-race in generic_fillattr / shmem_rename2 read to 0xffff888125d046c8 of 16 bytes by task 10134 on cpu 1: generic_fillattr+0x145/0x1e0 fs/stat.c:44 vfs_getattr_nosec+0x160/0x170 fs/stat.c:84 vfs_getattr+0x54/0x70 fs/stat.c:118 vfs_statx+0x102/0x190 fs/stat.c:191 vfs_stat include/linux/fs.h:3242 [inline] __do_sys_newstat+0x51/0xb0 fs/stat.c:341 __se_sys_newstat fs/stat.c:337 [inline] __x64_sys_newstat+0x3a/0x50 fs/stat.c:337 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffff888125d046c8 of 16 bytes by task 10218 on cpu 0: shmem_rename2+0x193/0x4a0 mm/shmem.c:3087 vfs_rename+0x87d/0x10b0 fs/namei.c:4469 do_renameat2+0x9e3/0xa50 fs/namei.c:4619 __do_sys_rename fs/namei.c:4665 [inline] __se_sys_rename fs/namei.c:4663 [inline] __x64_sys_rename+0x47/0x60 fs/namei.c:4663 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 10218 Comm: udevd Not tainted 5.4.0-rc3+ #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: 10218 Comm: udevd Not tainted 5.4.0-rc3+ #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+0xf5/0x159 lib/dump_stack.c:113 panic+0x210/0x640 kernel/panic.c:221 kcsan_report.cold+0xc/0x10 kernel/kcsan/report.c:302 __kcsan_setup_watchpoint+0x32e/0x4a0 kernel/kcsan/core.c:411 __tsan_write16 kernel/kcsan/kcsan.c:37 [inline] __tsan_write16+0x32/0x40 kernel/kcsan/kcsan.c:37 shmem_rename2+0x193/0x4a0 mm/shmem.c:3087 vfs_rename+0x87d/0x10b0 fs/namei.c:4469 do_renameat2+0x9e3/0xa50 fs/namei.c:4619 __do_sys_rename fs/namei.c:4665 [inline] __se_sys_rename fs/namei.c:4663 [inline] __x64_sys_rename+0x47/0x60 fs/namei.c:4663 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fdcf05e0527 Code: 32 00 64 83 38 15 74 07 b8 ff ff ff ff 5b c3 48 89 df e8 1c c1 07 00 85 c0 75 ed 31 c0 eb d3 90 90 90 90 b8 52 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 f8 32 00 31 d2 48 29 c2 64 RSP: 002b:00007ffcc0d0c488 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fdcf05e0527 RDX: 00007fdcf0911e98 RSI: 00007ffcc0d0c4c0 RDI: 00007ffcc0d0c8c0 RBP: 0000000000aea320 R08: 00007fdcf0f537a0 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000ae2ca0 R13: 0000000000ad1250 R14: 00007ffcc0d0c4c0 R15: 0000000000000001 Kernel Offset: disabled Rebooting in 86400 seconds..