pstore/ram: Add kmsg hlen zero check to ramoops_pstore_write()

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If zero-length header happened in ramoops_write_kmsg_hdr(), that means
we will not be able to read back dmesg record later, since it will be
treated as invalid header in ramoops_pstore_read(). So we should not
execute the following code but return the error.

Signed-off-by: Yue Hu <huyue2@yulong.com>
Signed-off-by: Kees Cook <keescook@chromium.org>

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Yue Hu 2019-02-01 11:27:32 +08:00 • committed by Kees Cook

parent 1e0f67a96a

commit 47afd7ae65

1 changed files with 3 additions and 0 deletions

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fs/pstore/ram.c

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