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| author | Li Zefan <lizefan@huawei.com> | 2013-03-12 15:36:00 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-05-07 19:51:56 -0700 |
| commit | 97630ecdbda8138baf35a66b6e59dee940da05e1 (patch) | |
| tree | 455d48c2c0f99103af12d4790c88d52626a63990 /fs/xfs/xfs_rtalloc.c | |
| parent | b593b4dc6442a5fd8a569fdbcc8cb5fa2609d1b1 (diff) | |
cgroup: fix an off-by-one bug which may trigger BUG_ON()
commit 3ac1707a13a3da9cfc8f242a15b2fae6df2c5f88 upstream.
The 3rd parameter of flex_array_prealloc() is the number of elements,
not the index of the last element.
The effect of the bug is, when opening cgroup.procs, a flex array will
be allocated and all elements of the array is allocated with
GFP_KERNEL flag, but the last one is GFP_ATOMIC, and if we fail to
allocate memory for it, it'll trigger a BUG_ON().
Signed-off-by: Li Zefan <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/xfs/xfs_rtalloc.c')
0 files changed, 0 insertions, 0 deletions