qlge: Avoid reading past end of buffer
Using memcpy() from a string that is shorter than the length copied means the destination buffer is being filled with arbitrary data from the kernel rodata segment. Instead, use strncpy() which will fill the trailing bytes with zeros. This was found with the future CONFIG_FORTIFY_SOURCE feature. Cc: Daniel Micay <danielmicay@gmail.com> Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -765,7 +765,7 @@ int ql_core_dump(struct ql_adapter *qdev, struct ql_mpi_coredump *mpi_coredump)
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sizeof(struct mpi_coredump_global_header);
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mpi_coredump->mpi_global_header.imageSize =
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sizeof(struct ql_mpi_coredump);
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memcpy(mpi_coredump->mpi_global_header.idString, "MPI Coredump",
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strncpy(mpi_coredump->mpi_global_header.idString, "MPI Coredump",
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sizeof(mpi_coredump->mpi_global_header.idString));
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/* Get generic NIC reg dump */
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@ -1255,7 +1255,7 @@ static void ql_gen_reg_dump(struct ql_adapter *qdev,
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sizeof(struct mpi_coredump_global_header);
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mpi_coredump->mpi_global_header.imageSize =
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sizeof(struct ql_reg_dump);
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memcpy(mpi_coredump->mpi_global_header.idString, "MPI Coredump",
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strncpy(mpi_coredump->mpi_global_header.idString, "MPI Coredump",
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sizeof(mpi_coredump->mpi_global_header.idString));
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