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KCSAN: data-race in __se_sys_prctl / __se_sys_prctl

Status: auto-obsoleted due to no activity on 2023/09/13 13:40
Subsystems: kernel
[Documentation on labels]
First crash: 752d, last: 752d

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

read-write to 0xffff88814cd55b80 of 1 bytes by task 886 on cpu 0:
 __do_sys_prctl kernel/sys.c:2558 [inline]
 __se_sys_prctl+0x31e/0x1de0 kernel/sys.c:2408
 __x64_sys_prctl+0x67/0x80 kernel/sys.c:2408
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read-write to 0xffff88814cd55b80 of 1 bytes by task 887 on cpu 1:
 __do_sys_prctl kernel/sys.c:2558 [inline]
 __se_sys_prctl+0x31e/0x1de0 kernel/sys.c:2408
 __x64_sys_prctl+0x67/0x80 kernel/sys.c:2408
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00 -> 0x01

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 887 Comm: syz-executor.4 Not tainted 6.5.0-rc5-syzkaller-00053-g13b937206866 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
==================================================================

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/08/09 13:39 upstream 13b937206866 8ad1a287 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __se_sys_prctl / __se_sys_prctl
* Struck through repros no longer work on HEAD.