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| author | Hannes Reinecke <hare@suse.de> | 2017-09-15 14:05:16 +0200 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2020-06-11 19:05:46 +0100 |
| commit | f37de82d22dc41e9748b788655fab4bfea465a02 (patch) | |
| tree | cb486c8f2a4f8577e779e566b6a4b7133d2cb9f9 | |
| parent | 72e47c58b24aef8c687cbaaffa3aa5f9fe88612c (diff) | |
| download | linux-stable-f37de82d22dc41e9748b788655fab4bfea465a02.tar.gz linux-stable-f37de82d22dc41e9748b788655fab4bfea465a02.tar.bz2 linux-stable-f37de82d22dc41e9748b788655fab4bfea465a02.zip | |
scsi: sg: fixup infoleak when using SG_GET_REQUEST_TABLE
commit 3e0097499839e0fe3af380410eababe5a47c4cf9 upstream.
When calling SG_GET_REQUEST_TABLE ioctl only a half-filled table is
returned; the remaining part will then contain stale kernel memory
information. This patch zeroes out the entire table to avoid this
issue.
Signed-off-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | drivers/scsi/sg.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c index 15cf7a291267..75da23660369 100644 --- a/drivers/scsi/sg.c +++ b/drivers/scsi/sg.c @@ -881,7 +881,6 @@ sg_fill_request_table(Sg_fd *sfp, sg_req_info_t *rinfo) list_for_each_entry(srp, &sfp->rq_list, entry) { if (val > SG_MAX_QUEUE) break; - memset(&rinfo[val], 0, SZ_SG_REQ_INFO); rinfo[val].req_state = srp->done + 1; rinfo[val].problem = srp->header.masked_status & @@ -1098,8 +1097,8 @@ sg_ioctl(struct file *filp, unsigned int cmd_in, unsigned long arg) else { sg_req_info_t *rinfo; - rinfo = kmalloc(SZ_SG_REQ_INFO * SG_MAX_QUEUE, - GFP_KERNEL); + rinfo = kzalloc(SZ_SG_REQ_INFO * SG_MAX_QUEUE, + GFP_KERNEL); if (!rinfo) return -ENOMEM; read_lock_irqsave(&sfp->rq_list_lock, iflags); |