KCSAN: data-race in _prb_read_valid / number

Status: moderation: reported on 2026/10/11 03:17
Subsystems: kernel
Labels: race:benign
[Documentation on labels]
Reported-by: syzbot+b82089b8a37dc8cfc993@syzkaller.appspotmail.com
First crash: 20h22m, last: 20h22m
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ID Workflow Result Correct Bug Created Started Finished Revision
674172cc assessment-kcsan Benign: ✅ ❓ KCSAN: data-race in _prb_read_valid / number 2026/10/11 03:16 2026/10/11 03:17 2026/10/11 04:16 4f92358f

Sample crash report:
BUG: KCSAN: data-race in _prb_read_valid / number
 vscnprintf+0x41/0x90 lib/vsprintf.c:3018
 printk_sprint+0x30/0x2b0 kernel/printk/printk.c:2222
 kthread+0x223/0x270 kernel/kthread.c:436
 nbcon_emit_next_record+0x4af/0x1bc0 kernel/printk/nbcon.c:1017
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/10/11 03:16 upstream a5ebb76233b7 4f92358f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / number
* Struck through repros no longer work on HEAD.