From: syzbot <syzbot+dd8e45eb61404849cde9@syzkaller.appspotmail.com>
To: bpf@vger.kernel.org, brauner@kernel.org, cgroups@vger.kernel.org,
glider@google.com, hannes@cmpxchg.org,
linux-kernel@vger.kernel.org, lizefan.x@bytedance.com,
syzkaller-bugs@googlegroups.com, tj@kernel.org
Subject: [syzbot] KMSAN: uninit-value in psi_poll_worker
Date: Fri, 26 Aug 2022 02:19:27 -0700 [thread overview]
Message-ID: <0000000000002c7abf05e721698d@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: 3a2b6b904ea7 x86: kmsan: enable KMSAN builds for x86
git tree: https://github.com/google/kmsan.git master
console output: https://syzkaller.appspot.com/x/log.txt?x=13f51a33080000
kernel config: https://syzkaller.appspot.com/x/.config?x=8e64bc5364a1307e
dashboard link: https://syzkaller.appspot.com/bug?extid=dd8e45eb61404849cde9
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project.git 610139d2d9ce6746b3c617fb3e2f7886272d26ff), GNU ld (GNU Binutils for Debian) 2.35.2
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+dd8e45eb61404849cde9@syzkaller.appspotmail.com
=====================================================
BUG: KMSAN: uninit-value in update_triggers kernel/sched/psi.c:525 [inline]
BUG: KMSAN: uninit-value in psi_poll_work kernel/sched/psi.c:626 [inline]
BUG: KMSAN: uninit-value in psi_poll_worker+0x972/0x16a0 kernel/sched/psi.c:648
update_triggers kernel/sched/psi.c:525 [inline]
psi_poll_work kernel/sched/psi.c:626 [inline]
psi_poll_worker+0x972/0x16a0 kernel/sched/psi.c:648
kthread+0x31b/0x430 kernel/kthread.c:376
ret_from_fork+0x1f/0x30
Uninit was stored to memory at:
collect_percpu_times+0x193d/0x19a0 kernel/sched/psi.c:355
psi_poll_work kernel/sched/psi.c:604 [inline]
psi_poll_worker+0x587/0x16a0 kernel/sched/psi.c:648
kthread+0x31b/0x430 kernel/kthread.c:376
ret_from_fork+0x1f/0x30
Uninit was stored to memory at:
collect_percpu_times+0x193d/0x19a0 kernel/sched/psi.c:355
psi_poll_work kernel/sched/psi.c:604 [inline]
psi_poll_worker+0x587/0x16a0 kernel/sched/psi.c:648
kthread+0x31b/0x430 kernel/kthread.c:376
ret_from_fork+0x1f/0x30
Uninit was created at:
slab_post_alloc_hook mm/slab.h:732 [inline]
slab_alloc_node mm/slub.c:3258 [inline]
slab_alloc mm/slub.c:3266 [inline]
kmem_cache_alloc_trace+0x696/0xdf0 mm/slub.c:3297
kmalloc include/linux/slab.h:600 [inline]
psi_cgroup_alloc+0x83/0x250 kernel/sched/psi.c:960
cgroup_create kernel/cgroup/cgroup.c:5430 [inline]
cgroup_mkdir+0x10a3/0x3080 kernel/cgroup/cgroup.c:5550
kernfs_iop_mkdir+0x2ba/0x520 fs/kernfs/dir.c:1185
vfs_mkdir+0x62a/0x870 fs/namei.c:4013
do_mkdirat+0x466/0x7b0 fs/namei.c:4038
__do_sys_mkdirat fs/namei.c:4053 [inline]
__se_sys_mkdirat fs/namei.c:4051 [inline]
__x64_sys_mkdirat+0xc4/0x120 fs/namei.c:4051
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
CPU: 0 PID: 19765 Comm: psimon Not tainted 6.0.0-rc2-syzkaller-47460-g3a2b6b904ea7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
=====================================================
---
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next reply other threads:[~2022-08-26 9:19 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-26 9:19 syzbot [this message]
2022-08-26 9:27 ` [syzbot] KMSAN: uninit-value in psi_poll_worker syzbot
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