[Bug 6422] grep and segfault

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=6422

--- Comment #4 from Denys Vlasenko <vda.linux at googlemail.com> 2013-08-14 22:13:11 UTC ---
The strace output you posted ends with:

...
lstat64("./proc/stclkrv_core", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0
open("./proc/stclkrv_core",
O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|0x80000) = 5
getdents64(0x5, 0x5b37a0, 0x8000, 0x800000) = 136
lstat64("./proc/stclkrv_core/odf", {st_mode=S_IFREG|0444, st_size=37, ...}) = 0
open("./proc/stclkrv_core/odf", O_RDONLY|O_LARGEFILE) = 6
fstat64(6, {st_mode=S_IFREG|0444, st_size=37, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x29558000
read(6,  <unfinished ...>


IOW: there is no segfault in strace output. grep is just stuck trying to read
some /proc file.

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