From: Li Huafei <lihuafei1@xxxxxxxxxx>
[ Upstream commit 7990ccafaa37dc6d8bb095d4d7cd997e8903fd10 ]
In ima_restore_measurement_list(), hdr[HDR_PCR].data is pointing to a
buffer of type u8, which contains the dumped 32-bit pcr value.
Currently, only the least significant byte is used to restore the pcr
value. We should convert hdr[HDR_PCR].data to a pointer of type u32
before fetching the value to restore the correct pcr value.
Fixes: 47fdee60b47f ("ima: use ima_parse_buf() to parse measurements headers")
Signed-off-by: Li Huafei <lihuafei1@xxxxxxxxxx>
Reviewed-by: Roberto Sassu <roberto.sassu@xxxxxxxxxx>
Signed-off-by: Mimi Zohar <zohar@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
security/integrity/ima/ima_template.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/security/integrity/ima/ima_template.c b/security/integrity/ima/ima_template.c
index 1e89e2d3851f..f83255a39e65 100644
--- a/security/integrity/ima/ima_template.c
+++ b/security/integrity/ima/ima_template.c
@@ -468,8 +468,8 @@ int ima_restore_measurement_list(loff_t size, void *buf)
}
}
- entry->pcr = !ima_canonical_fmt ? *(hdr[HDR_PCR].data) :
- le32_to_cpu(*(hdr[HDR_PCR].data));
+ entry->pcr = !ima_canonical_fmt ? *(u32 *)(hdr[HDR_PCR].data) :
+ le32_to_cpu(*(u32 *)(hdr[HDR_PCR].data));
ret = ima_restore_measurement_entry(entry);
if (ret < 0)
break;
--
2.30.2
