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================================================================== BUG: KCSAN: data-race in cgroup_migrate_add_task / do_nanosleep write to 0xffff888124d67064 of 4 bytes by task 8830 on cpu 0: freezer_count include/linux/freezer.h:121 [inline] freezable_schedule include/linux/freezer.h:173 [inline] do_nanosleep+0x121/0x3a0 kernel/time/hrtimer.c:1879 hrtimer_nanosleep kernel/time/hrtimer.c:1932 [inline] __do_sys_nanosleep kernel/time/hrtimer.c:1966 [inline] __se_sys_nanosleep+0x20b/0x2a0 kernel/time/hrtimer.c:1953 __x64_sys_nanosleep+0x2d/0x40 kernel/time/hrtimer.c:1953 do_syscall_64+0x51/0xb0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff888124d67064 of 4 bytes by task 23909 on cpu 1: cgroup_migrate_add_task+0x1f/0x2e0 kernel/cgroup/cgroup.c:2299 cgroup_migrate kernel/cgroup/cgroup.c:2700 [inline] cgroup_attach_task+0x16b/0x340 kernel/cgroup/cgroup.c:2740 cgroup_procs_write+0x151/0x1c0 kernel/cgroup/cgroup.c:4757 cgroup_file_write+0x15b/0x2d0 kernel/cgroup/cgroup.c:3697 kernfs_fop_write+0x207/0x2c0 fs/kernfs/file.c:315 do_loop_readv_writev fs/read_write.c:718 [inline] do_iter_write+0x2d2/0x470 fs/read_write.c:1001 vfs_writev fs/read_write.c:1072 [inline] do_writev+0x19a/0x340 fs/read_write.c:1115 __do_sys_writev fs/read_write.c:1188 [inline] __se_sys_writev fs/read_write.c:1185 [inline] __x64_sys_writev+0x41/0x50 fs/read_write.c:1185 do_syscall_64+0x51/0xb0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 23909 Comm: syz-executor.2 Not tainted 5.8.0-rc4-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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2020/07/07 07:51 | upstream | bfe91da29bfa | 42723355 | .config | console log | report | ci2-upstream-kcsan-gce |