diff options
| author | Oleksandr Natalenko <oleksandr@redhat.com> | 2023-07-31 10:40:34 +0200 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2023-07-31 14:42:59 -0400 |
| commit | 25dbc20deab5165f847b4eb42f376f725a986ee8 (patch) | |
| tree | d2726a42a0ffe4d7987ea2b4a40505458051ff75 /drivers/scsi/qedf/qedf_dbg.h | |
| parent | 31b5991a9a91ba97237ac9da509d78eec453ff72 (diff) | |
scsi: qedf: Do not touch __user pointer in qedf_dbg_fp_int_cmd_read() directly
The qedf_dbg_fp_int_cmd_read() function invokes sprintf() directly on a
__user pointer, which may crash the kernel.
Avoid doing that by vmalloc()'ating a buffer for scnprintf() and then
calling simple_read_from_buffer() which does a proper copy_to_user() call.
Fixes: 61d8658b4a43 ("scsi: qedf: Add QLogic FastLinQ offload FCoE driver framework.")
Link: https://lore.kernel.org/lkml/20230724120241.40495-1-oleksandr@redhat.com/
Link: https://lore.kernel.org/linux-scsi/20230726101236.11922-1-skashyap@marvell.com/
Cc: Saurav Kashyap <skashyap@marvell.com>
Cc: Rob Evers <revers@redhat.com>
Cc: Johannes Thumshirn <Johannes.Thumshirn@wdc.com>
Cc: David Laight <David.Laight@ACULAB.COM>
Cc: Jozef Bacik <jobacik@redhat.com>
Cc: Laurence Oberman <loberman@redhat.com>
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: GR-QLogic-Storage-Upstream@marvell.com
Cc: linux-scsi@vger.kernel.org
Reviewed-by: Laurence Oberman <loberman@redhat.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Tested-by: Laurence Oberman <loberman@redhat.com>
Acked-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Oleksandr Natalenko <oleksandr@redhat.com>
Link: https://lore.kernel.org/r/20230731084034.37021-4-oleksandr@redhat.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/qedf/qedf_dbg.h')
| -rw-r--r-- | drivers/scsi/qedf/qedf_dbg.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/scsi/qedf/qedf_dbg.h b/drivers/scsi/qedf/qedf_dbg.h index f4d81127239e..5ec2b817c694 100644 --- a/drivers/scsi/qedf/qedf_dbg.h +++ b/drivers/scsi/qedf/qedf_dbg.h @@ -59,6 +59,8 @@ extern uint qedf_debug; #define QEDF_LOG_NOTICE 0x40000000 /* Notice logs */ #define QEDF_LOG_WARN 0x80000000 /* Warning logs */ +#define QEDF_DEBUGFS_LOG_LEN (2 * PAGE_SIZE) + /* Debug context structure */ struct qedf_dbg_ctx { unsigned int host_no; |