diff options
| author | Andi Kleen <ak@suse.de> | 2008-01-13 17:41:43 +0100 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2008-01-23 18:29:27 +0100 |
| commit | eaa3e22e8d32bf7a6176f04efad90f4a5aa67f58 (patch) | |
| tree | e07c69ade8e52ee383f3f169fcc7b7e6b88cca83 /drivers/scsi/sg.c | |
| parent | [SCSI] aacraid: fix security weakness (diff) | |
| download | linux-eaa3e22e8d32bf7a6176f04efad90f4a5aa67f58.tar.xz linux-eaa3e22e8d32bf7a6176f04efad90f4a5aa67f58.zip | |
[SCSI] sg: Only print SCSI data direction warning once for a command
When I use cdparanoia my logs get spammed a lot by
printk: 464 messages suppressed.
sg_write: data in/out 30576/30576 bytes for SCSI command 0xbe--guessing data in;
program cdparanoia not setting count and/or reply_len properly
printk: 1078 messages suppressed.
and many more of those. With this patch the message is only printed once
for a command in a row.
v1->v2: Prevent rate limit messages too (pointed out by jejb)
Signed-off-by: Andi Kleen <ak@suse.de>
Acked-by: Douglas Gilbert <dougg@torque.net>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/scsi/sg.c')
| -rw-r--r-- | drivers/scsi/sg.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c index f1871ea04045..e65f5d432662 100644 --- a/drivers/scsi/sg.c +++ b/drivers/scsi/sg.c @@ -602,8 +602,9 @@ sg_write(struct file *filp, const char __user *buf, size_t count, loff_t * ppos) * but is is possible that the app intended SG_DXFER_TO_DEV, because there * is a non-zero input_size, so emit a warning. */ - if (hp->dxfer_direction == SG_DXFER_TO_FROM_DEV) - if (printk_ratelimit()) + if (hp->dxfer_direction == SG_DXFER_TO_FROM_DEV) { + static char cmd[TASK_COMM_LEN]; + if (strcmp(current->comm, cmd) && printk_ratelimit()) { printk(KERN_WARNING "sg_write: data in/out %d/%d bytes for SCSI command 0x%x--" "guessing data in;\n" KERN_WARNING " " @@ -611,6 +612,9 @@ sg_write(struct file *filp, const char __user *buf, size_t count, loff_t * ppos) old_hdr.reply_len - (int)SZ_SG_HEADER, input_size, (unsigned int) cmnd[0], current->comm); + strcpy(cmd, current->comm); + } + } k = sg_common_write(sfp, srp, cmnd, sfp->timeout, blocking); return (k < 0) ? k : count; } |