In case that helps, here's a bit more information:
30797 ? Ssl 0:02 /usr/sbin/NetworkManager --no-daemon
32056 ? Z 0:00 \_ [dhclient] <defunct>
Here's the loop NetworkManager hangs in:
munmap(0x7fe97f86c000, 4096) = 0
kill(32056, SIG_0) = 0
nanosleep({0, 50000000}, 0x7fff277ce810) = 0
open("/proc/32056/stat", O_RDONLY) = 22
fstat(22, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
fcntl(22, F_GETFL) = 0x8000 (flags
O_RDONLY|O_LARGEFILE)
fstat(22, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fe97f86c000
lseek(22, 0, SEEK_CUR) = 0
read(22, "32056 (dhclient) Z 30797 32056 3"..., 4096) = 175
read(22, "", 3072) = 0
close(22) = 0
munmap(0x7fe97f86c000, 4096) = 0
kill(32056, SIG_0) = 0
...
So I guess it should either register SIGCHLD for auto-cleanup, or see the
"Z" in the "stat" file.
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