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| author | Jayachandran C <jchandra@digeo.com> | 2005-10-28 02:51:13 +0400 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.(none)> | 2005-10-29 02:41:39 +0400 |
| commit | 4647722673994787bfa294a163fcb6955b93d417 (patch) | |
| tree | f355d7d95ca0493ed4181a9517315d9b1db3c418 /drivers/scsi/scsi_ioctl.c | |
| parent | b5141128027c53b8ca40736d969f75c9a1cdb64b (diff) | |
| download | linux-4647722673994787bfa294a163fcb6955b93d417.tar.xz | |
[SCSI] Fix issue reported by coverity in drivers/scsi/scsi_ioctl.c
This patch attempts to fix an issue found in drivers/scsi/scsi_ioctl.c by Coverity.
Error reported:
CID: 3437
Checker: FORWARD_NULL (help)
File: /export2/p4-coverity/mc2/linux26/drivers/scsi/scsi_ioctl.c
Function: scsi_ioctl_send_command
Description: Variable "buf" tracked as NULL was passed to a function that dereferences it.
Patch description:
buf can be NULL if inlen and outlen are both 0. This patch adds check if the
length is non-zero before calling copy from/to user.
Signed-off-by: Jayachandran C. <c.jayachandran@gmail.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/scsi_ioctl.c')
| -rw-r--r-- | drivers/scsi/scsi_ioctl.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/scsi/scsi_ioctl.c b/drivers/scsi/scsi_ioctl.c index 26f5bc6d9c82..0bba7d8eebb0 100644 --- a/drivers/scsi/scsi_ioctl.c +++ b/drivers/scsi/scsi_ioctl.c @@ -278,7 +278,7 @@ int scsi_ioctl_send_command(struct scsi_device *sdev, * Obtain the data to be sent to the device (if any). */ - if(copy_from_user(buf, cmd_in + cmdlen, inlen)) + if(inlen && copy_from_user(buf, cmd_in + cmdlen, inlen)) goto error; switch (opcode) { @@ -322,7 +322,7 @@ int scsi_ioctl_send_command(struct scsi_device *sdev, if (copy_to_user(cmd_in, sense, sb_len)) result = -EFAULT; } else { - if (copy_to_user(cmd_in, buf, outlen)) + if (outlen && copy_to_user(cmd_in, buf, outlen)) result = -EFAULT; } |