Revision 4528fd0595847c2078b59f24800e751c2d6b7e41 authored by Li Zefan on 02 February 2010, 21:44:10 UTC, committed by Linus Torvalds on 03 February 2010, 02:11:22 UTC
In cgroup_create(), if alloc_css_id() returns failure, the errno is not propagated to userspace, so mkdir will fail silently. To trigger this bug, we mount blkio (or memory subsystem), and create more then 65534 cgroups. (The number of cgroups is limited to 65535 if a subsystem has use_id == 1) # mount -t cgroup -o blkio xxx /mnt # for ((i = 0; i < 65534; i++)); do mkdir /mnt/$i; done # mkdir /mnt/65534 (should return ENOSPC) # Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Acked-by: Serge Hallyn <serue@us.ibm.com> Acked-by: Paul Menage <menage@google.com> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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| File | Mode | Size |
|---|---|---|
| Kconfig | -rw-r--r-- | 39.8 KB |
| Makefile | -rw-r--r-- | 1.0 KB |
| calibrate.c | -rw-r--r-- | 5.1 KB |
| do_mounts.c | -rw-r--r-- | 9.3 KB |
| do_mounts.h | -rw-r--r-- | 1.4 KB |
| do_mounts_initrd.c | -rw-r--r-- | 3.2 KB |
| do_mounts_md.c | -rw-r--r-- | 7.9 KB |
| do_mounts_rd.c | -rw-r--r-- | 8.0 KB |
| initramfs.c | -rw-r--r-- | 12.6 KB |
| main.c | -rw-r--r-- | 21.1 KB |
| noinitramfs.c | -rw-r--r-- | 1.4 KB |
| version.c | -rw-r--r-- | 1.1 KB |
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