This is a note to let you know that I've just added the patch titled
scsi: ufs: fix bugs related to null pointer access and array size
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
scsi-ufs-fix-bugs-related-to-null-pointer-access-and-array-size.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e3ce73d69aff44421d7899b235fec5ac2c306ff4 Mon Sep 17 00:00:00 2001
From: Yaniv Gardi <ygardi@xxxxxxxxxxxxxx>
Date: Mon, 17 Oct 2016 17:09:24 -0700
Subject: scsi: ufs: fix bugs related to null pointer access and array size
From: Yaniv Gardi <ygardi@xxxxxxxxxxxxxx>
commit e3ce73d69aff44421d7899b235fec5ac2c306ff4 upstream.
In this change there are a few fixes of possible NULL pointer access and
possible access to index that exceeds array boundaries.
Signed-off-by: Yaniv Gardi <ygardi@xxxxxxxxxxxxxx>
Signed-off-by: Subhash Jadavani <subhashj@xxxxxxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Amit Pundir <amit.pundir@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/scsi/ufs/ufs.h | 3 ++-
drivers/scsi/ufs/ufshcd.c | 25 +++++++++++++++++++------
2 files changed, 21 insertions(+), 7 deletions(-)
--- a/drivers/scsi/ufs/ufs.h
+++ b/drivers/scsi/ufs/ufs.h
@@ -46,6 +46,7 @@
#define QUERY_DESC_HDR_SIZE 2
#define QUERY_OSF_SIZE (GENERAL_UPIU_REQUEST_SIZE - \
(sizeof(struct utp_upiu_header)))
+#define RESPONSE_UPIU_SENSE_DATA_LENGTH 18
#define UPIU_HEADER_DWORD(byte3, byte2, byte1, byte0)\
cpu_to_be32((byte3 << 24) | (byte2 << 16) |\
@@ -410,7 +411,7 @@ struct utp_cmd_rsp {
__be32 residual_transfer_count;
__be32 reserved[4];
__be16 sense_data_len;
- u8 sense_data[18];
+ u8 sense_data[RESPONSE_UPIU_SENSE_DATA_LENGTH];
};
/**
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -901,10 +901,14 @@ static inline void ufshcd_copy_sense_dat
int len;
if (lrbp->sense_buffer &&
ufshcd_get_rsp_upiu_data_seg_len(lrbp->ucd_rsp_ptr)) {
+ int len_to_copy;
+
len = be16_to_cpu(lrbp->ucd_rsp_ptr->sr.sense_data_len);
+ len_to_copy = min_t(int, RESPONSE_UPIU_SENSE_DATA_LENGTH, len);
+
memcpy(lrbp->sense_buffer,
lrbp->ucd_rsp_ptr->sr.sense_data,
- min_t(int, len, SCSI_SENSE_BUFFERSIZE));
+ min_t(int, len_to_copy, SCSI_SENSE_BUFFERSIZE));
}
}
@@ -6373,7 +6377,10 @@ EXPORT_SYMBOL(ufshcd_system_suspend);
int ufshcd_system_resume(struct ufs_hba *hba)
{
- if (!hba || !hba->is_powered || pm_runtime_suspended(hba->dev))
+ if (!hba)
+ return -EINVAL;
+
+ if (!hba->is_powered || pm_runtime_suspended(hba->dev))
/*
* Let the runtime resume take care of resuming
* if runtime suspended.
@@ -6394,7 +6401,10 @@ EXPORT_SYMBOL(ufshcd_system_resume);
*/
int ufshcd_runtime_suspend(struct ufs_hba *hba)
{
- if (!hba || !hba->is_powered)
+ if (!hba)
+ return -EINVAL;
+
+ if (!hba->is_powered)
return 0;
return ufshcd_suspend(hba, UFS_RUNTIME_PM);
@@ -6424,10 +6434,13 @@ EXPORT_SYMBOL(ufshcd_runtime_suspend);
*/
int ufshcd_runtime_resume(struct ufs_hba *hba)
{
- if (!hba || !hba->is_powered)
+ if (!hba)
+ return -EINVAL;
+
+ if (!hba->is_powered)
return 0;
- else
- return ufshcd_resume(hba, UFS_RUNTIME_PM);
+
+ return ufshcd_resume(hba, UFS_RUNTIME_PM);
}
EXPORT_SYMBOL(ufshcd_runtime_resume);
Patches currently in stable-queue which might be from ygardi@xxxxxxxxxxxxxx are
queue-4.9/scsi-ufs-fix-bugs-related-to-null-pointer-access-and-array-size.patch
