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@xxxxxxxxxxxxxxxxxxxxxxxxx ===================================================== 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 ===================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
