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[PATCHv2,13/22] crypto: omap-aes-gcm - deal with memory allocation failure

Message ID 20191105140111.20285-14-t-kristo@ti.com (mailing list archive)
State Accepted
Delegated to: Herbert Xu
Headers show
Series crypto: omap-sham: fixes towards 5.5 | expand

Commit Message

Tero Kristo Nov. 5, 2019, 2:01 p.m. UTC 
From: Ard Biesheuvel <ardb@kernel.org>

The OMAP gcm(aes) driver invokes omap_crypto_align_sg() without
dealing with the errors it may return, resulting in a crash if
the routine fails in a __get_free_pages(GFP_ATOMIC) call. So
bail and return the error rather than limping on if one occurs.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Tero Kristo <t-kristo@ti.com>
Tested-by: Tero Kristo <t-kristo@ti.com>
---
 drivers/crypto/omap-aes-gcm.c | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/drivers/crypto/omap-aes-gcm.c b/drivers/crypto/omap-aes-gcm.c
index dfd4d1cac421..05d2fe78b105 100644
--- a/drivers/crypto/omap-aes-gcm.c
+++ b/drivers/crypto/omap-aes-gcm.c
@@ -120,6 +120,8 @@  static int omap_aes_gcm_copy_buffers(struct omap_aes_dev *dd,
 					   OMAP_CRYPTO_FORCE_SINGLE_ENTRY,
 					   FLAGS_ASSOC_DATA_ST_SHIFT,
 					   &dd->flags);
+		if (ret)
+			return ret;
 	}
 
 	if (cryptlen) {
@@ -132,6 +134,8 @@  static int omap_aes_gcm_copy_buffers(struct omap_aes_dev *dd,
 					   OMAP_CRYPTO_FORCE_SINGLE_ENTRY,
 					   FLAGS_IN_DATA_ST_SHIFT,
 					   &dd->flags);
+		if (ret)
+			return ret;
 	}
 
 	dd->in_sg = dd->in_sgl;