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KCSAN: data-race in inode_doinit_with_dentry / inode_doinit_with_dentry (5)

Status: auto-obsoleted due to no activity on 2026/02/18 00:11
Subsystems: selinux
[Documentation on labels]
Reported-by: syzbot+9ab96b38b76bec93939a@syzkaller.appspotmail.com
First crash: 180d, last: 180d
▶ ▼ ✨ AI Jobs (1)
ID Workflow Result Correct Bug Created Started Finished Revision Error
c229facb-5682-4f14-8b4c-7d996972df35 assessment-kcsan 💥 KCSAN: data-race in inode_doinit_with_dentry / inode_doinit_with_dentry (5) 2026/01/10 07:08 2026/01/10 07:08 2026/01/10 07:26 7519916073b761ced56a7b15fdeeb4674e8dc125 
Error 429, Message: You exceeded your current quota, please check your plan and billing details. For more information on this error, head to: https://ai.google.dev/gemini-api/docs/rate-limits. To moni...
truncated to first 200 bytes; open job for full error
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[RFC PATCH 2/2] selinux: fix data race on AVC latest_notif 3 (3) 2026/04/27 22:16
▶ ▼ Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in inode_doinit_with_dentry / inode_doinit_with_dentry (4) selinux 6 2 358d 410d 0/29 auto-obsoleted due to no activity on 2025/08/23 22:33
upstream KCSAN: data-race in inode_doinit_with_dentry / inode_doinit_with_dentry (2) selinux 6 1 791d 791d 0/29 auto-obsoleted due to no activity on 2024/05/26 16:52
upstream KCSAN: data-race in inode_doinit_with_dentry / inode_doinit_with_dentry selinux 6 1 1155d 1155d 0/29 auto-obsoleted due to no activity on 2023/05/28 13:10
upstream KCSAN: data-race in inode_doinit_with_dentry / inode_doinit_with_dentry (3) selinux 6 1 515d 515d 0/29 auto-obsoleted due to no activity on 2025/03/19 10:00

Sample crash report:
==================================================================
BUG: KCSAN: data-race in inode_doinit_with_dentry / inode_doinit_with_dentry

write to 0xffff88812632ba7a of 1 bytes by task 4634 on cpu 1:
 inode_doinit_with_dentry+0x285/0x7a0 security/selinux/hooks.c:1459
 __inode_security_revalidate security/selinux/hooks.c:298 [inline]
 inode_security security/selinux/hooks.c:332 [inline]
 selinux_file_open+0xe4/0x330 security/selinux/hooks.c:4145
 security_file_open+0x36/0x70 security/security.c:2636
 do_dentry_open+0x216/0xa60 fs/open.c:939
 vfs_open+0x37/0x1e0 fs/open.c:1094
 dentry_open+0x4a/0x90 fs/open.c:1117
 pidfs_alloc_file+0xe2/0x180 fs/pidfs.c:1079
 pidfd_prepare+0x11d/0x170 kernel/fork.c:1900
 pidfd_create kernel/pid.c:625 [inline]
 __do_sys_pidfd_open kernel/pid.c:661 [inline]
 __se_sys_pidfd_open+0x133/0x270 kernel/pid.c:646
 __x64_sys_pidfd_open+0x31/0x40 kernel/pid.c:646
 x64_sys_call+0x57c/0x3000 arch/x86/include/generated/asm/syscalls_64.h:435
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xca/0x2b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff88812632ba7a of 1 bytes by task 4632 on cpu 0:
 inode_doinit_with_dentry+0x74/0x7a0 security/selinux/hooks.c:1434
 __inode_security_revalidate security/selinux/hooks.c:298 [inline]
 inode_security security/selinux/hooks.c:332 [inline]
 selinux_file_open+0xe4/0x330 security/selinux/hooks.c:4145
 security_file_open+0x36/0x70 security/security.c:2636
 do_dentry_open+0x216/0xa60 fs/open.c:939
 vfs_open+0x37/0x1e0 fs/open.c:1094
 dentry_open+0x4a/0x90 fs/open.c:1117
 pidfs_alloc_file+0xe2/0x180 fs/pidfs.c:1079
 pidfd_prepare+0x11d/0x170 kernel/fork.c:1900
 pidfd_create kernel/pid.c:625 [inline]
 __do_sys_pidfd_open kernel/pid.c:661 [inline]
 __se_sys_pidfd_open+0x133/0x270 kernel/pid.c:646
 __x64_sys_pidfd_open+0x31/0x40 kernel/pid.c:646
 x64_sys_call+0x57c/0x3000 arch/x86/include/generated/asm/syscalls_64.h:435
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xca/0x2b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00 -> 0x01

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 4632 Comm: syz.7.319 Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
==================================================================

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/12/24 00:10 upstream b927546677c8 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in inode_doinit_with_dentry / inode_doinit_with_dentry
* Struck through repros no longer work on HEAD.