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================================================================== BUG: KCSAN: data-race in cgroup_migrate_add_task / vcpu_enter_guest read to 0xffff8880ab523064 of 4 bytes by task 9574 on cpu 1: cgroup_migrate_add_task+0x3d/0x440 kernel/cgroup/cgroup.c:2298 cgroup_update_dfl_csses+0x2d3/0x350 kernel/cgroup/cgroup.c:2909 cgroup_apply_control kernel/cgroup/cgroup.c:3153 [inline] cgroup_apply_control+0x47/0x60 kernel/cgroup/cgroup.c:3138 cgroup_subtree_control_write+0x598/0x760 kernel/cgroup/cgroup.c:3302 cgroup_file_write+0x119/0x320 kernel/cgroup/cgroup.c:3699 kernfs_fop_write+0x1bd/0x300 fs/kernfs/file.c:315 __vfs_write+0x67/0xc0 fs/read_write.c:494 vfs_write fs/read_write.c:558 [inline] vfs_write+0x18a/0x390 fs/read_write.c:542 ksys_write+0xd5/0x1b0 fs/read_write.c:611 __do_sys_write fs/read_write.c:623 [inline] __se_sys_write fs/read_write.c:620 [inline] __x64_sys_write+0x4c/0x60 fs/read_write.c:620 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffff8880ab523064 of 4 bytes by task 9569 on cpu 0: guest_enter_irqoff include/linux/context_tracking.h:145 [inline] vcpu_enter_guest+0x7b3/0x3860 arch/x86/kvm/x86.c:8199 vcpu_run arch/x86/kvm/x86.c:8354 [inline] kvm_arch_vcpu_ioctl_run+0x2a8/0xdf0 arch/x86/kvm/x86.c:8561 kvm_vcpu_ioctl+0x758/0xa30 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2847 vfs_ioctl fs/ioctl.c:47 [inline] file_ioctl fs/ioctl.c:545 [inline] do_vfs_ioctl+0x84f/0xcf0 fs/ioctl.c:732 ksys_ioctl+0xbd/0xe0 fs/ioctl.c:749 __do_sys_ioctl fs/ioctl.c:756 [inline] __se_sys_ioctl fs/ioctl.c:754 [inline] __x64_sys_ioctl+0x4c/0x60 fs/ioctl.c:754 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 9569 Comm: syz-executor.1 Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2020/01/24 09:50 | https://github.com/google/ktsan.git kcsan | 245a43005292 | 2e95ab33 | .config | console log | report | ci2-upstream-kcsan-gce |