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linux/fs/pstore
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Liu ShuoX c1f4213810 pstore: Fix NULL pointer fault if get NULL prz in ramoops_get_next_prz 
commit b0aa931fb8 upstream.

ramoops_get_next_prz get the prz according the paramters. If it get a
uninitialized prz, access its members by following persistent_ram_old_size(prz)
will cause a NULL pointer crash.
Ex: if ftrace_size is 0, fprz will be NULL.

Fix it by return NULL in advance.

Signed-off-by: Liu ShuoX <shuox.liu@intel.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Cc: HuKeping <hukeping@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2015-02-05 22:35:52 -08:00
..
ftrace.c pstore: Add hsize argument in write_buf call of pstore_ftrace_call 2013-07-02 18:39:37 +10:00
inode.c pstore: Fix duplicate {console,ftrace}-efi entries 2014-11-14 08:59:50 -08:00
internal.h pstore: Add file extension to pstore file if compressed 2013-08-19 11:53:27 -07:00
Kconfig pstore/Kconfig: Select ZLIB_DEFLATE and ZLIB_INFLATE when PSTORE is selected 2013-08-19 10:18:10 -07:00
Makefile pstore: Add persistent function tracing 2012-07-17 10:05:52 -07:00
platform.c pstore: Don't allow high traffic options on fragile devices 2013-12-20 13:12:01 -08:00
ram.c pstore: Fix NULL pointer fault if get NULL prz in ramoops_get_next_prz 2015-02-05 22:35:52 -08:00
ram_core.c pstore-ram: Allow optional mapping with pgprot_noncached 2015-01-16 06:59:30 -08:00