[pid   157] openat(AT_FDCWD, "/proc/164/uid_map", O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC, 0666 <unfinished ...>
[pid   164] close(18 <unfinished ...>
[pid   157] <... openat resumed>)       = 16
[pid   164] <... close resumed>)        = 0
[pid   157] write(16, "1000 30001 1", 12) = -1 EPERM (Operation not permitted)
[pid   157] close(16)                   = 0
[pid   157] kill(-164, SIGKILL)         = 0