Messages in this thread Patch in this message | | | Date | Thu, 14 Jun 2007 14:24:30 +0000 | From | Dave Young <> | Subject | [PATCH] cdrom_sysctl_info fix |
| |
Hi,
Fix the cdrom_sysctl_info possible buffer overwrite bug. Somd codingstyle fixes are included as well.
diff based on 2.6.22-rc4
Signed-off-by: Dave Young <hidave.darkstar@gmail.com> --- drivers/cdrom/cdrom.c | 186 +- 1 files changed, 102 insertions(+), 84 deletions(-)
diff -upr linux/drivers/cdrom/cdrom.c linux.new/drivers/cdrom/cdrom.c --- linux/drivers/cdrom/cdrom.c 2007-06-14 14:05:04.000000000 +0000 +++ linux.new/drivers/cdrom/cdrom.c 2007-06-14 14:11:58.000000000 +0000 @@ -3290,102 +3290,120 @@ static struct cdrom_sysctl_settings { } cdrom_sysctl_settings; static int cdrom_sysctl_info(ctl_table *ctl, int write, struct file * filp, - void __user *buffer, size_t *lenp, loff_t *ppos) + void __user *buffer, size_t *lenp, loff_t *ppos) { - int pos; + int pos; struct cdrom_device_info *cdi; char *info = cdrom_sysctl_settings.info; + int size = sizeof(cdrom_sysctl_settings.info); if (!*lenp || (*ppos && !write)) { *lenp = 0; return 0; } - pos = sprintf(info, "CD-ROM information, " VERSION "\n"); + pos = scnprintf(info, size, "CD-ROM information, " VERSION "\n"); - pos += sprintf(info+pos, "\ndrive name:\t"); - for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) - pos += sprintf(info+pos, "\t%s", cdi->name); - - pos += sprintf(info+pos, "\ndrive speed:\t"); - for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) - pos += sprintf(info+pos, "\t%d", cdi->speed); - - pos += sprintf(info+pos, "\ndrive # of slots:"); - for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) - pos += sprintf(info+pos, "\t%d", cdi->capacity); - - pos += sprintf(info+pos, "\nCan close tray:\t"); - for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) - pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_CLOSE_TRAY) != 0); - - pos += sprintf(info+pos, "\nCan open tray:\t"); - for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) - pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_OPEN_TRAY) != 0); - - pos += sprintf(info+pos, "\nCan lock tray:\t"); - for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) - pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_LOCK) != 0); - - pos += sprintf(info+pos, "\nCan change speed:"); - for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) - pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_SELECT_SPEED) != 0); - - pos += sprintf(info+pos, "\nCan select disk:"); - for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) - pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_SELECT_DISC) != 0); - - pos += sprintf(info+pos, "\nCan read multisession:"); - for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) - pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MULTI_SESSION) != 0); - - pos += sprintf(info+pos, "\nCan read MCN:\t"); - for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) - pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MCN) != 0); - - pos += sprintf(info+pos, "\nReports media changed:"); - for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) - pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MEDIA_CHANGED) != 0); - - pos += sprintf(info+pos, "\nCan play audio:\t"); - for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) - pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_PLAY_AUDIO) != 0); - - pos += sprintf(info+pos, "\nCan write CD-R:\t"); - for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) - pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_CD_R) != 0); - - pos += sprintf(info+pos, "\nCan write CD-RW:"); - for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) - pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_CD_RW) != 0); - - pos += sprintf(info+pos, "\nCan read DVD:\t"); - for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) - pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_DVD) != 0); - - pos += sprintf(info+pos, "\nCan write DVD-R:"); - for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) - pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_DVD_R) != 0); - - pos += sprintf(info+pos, "\nCan write DVD-RAM:"); - for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) - pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_DVD_RAM) != 0); - - pos += sprintf(info+pos, "\nCan read MRW:\t"); - for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) - pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MRW) != 0); - - pos += sprintf(info+pos, "\nCan write MRW:\t"); - for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) - pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MRW_W) != 0); - - pos += sprintf(info+pos, "\nCan write RAM:\t"); - for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) - pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_RAM) != 0); + pos += scnprintf(info + pos, size - pos, "\ndrive name:\t"); + for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) + pos += scnprintf(info + pos, size - pos, "\t%s", cdi->name); + + pos += scnprintf(info + pos, size - pos ,"\ndrive speed:\t"); + for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) + pos += scnprintf(info + pos, size - pos, "\t%d", cdi->speed); + + pos += scnprintf(info + pos, size - pos, "\ndrive # of slots:"); + for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) + pos += scnprintf(info + pos, size - pos, "\t%d", cdi->capacity); + + pos += scnprintf(info + pos, size - pos, "\nCan close tray:\t"); + for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) + pos += scnprintf(info + pos, size - pos, "\t%d", + CDROM_CAN(CDC_CLOSE_TRAY) != 0); + + pos += scnprintf(info + pos, size - pos, "\nCan open tray:\t"); + for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) + pos += scnprintf(info + pos, size - pos, "\t%d", + CDROM_CAN(CDC_OPEN_TRAY) != 0); + + pos += scnprintf(info + pos, size - pos, "\nCan lock tray:\t"); + for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) + pos += scnprintf(info + pos, size - pos, "\t%d", + CDROM_CAN(CDC_LOCK) != 0); + + pos += scnprintf(info + pos, size - pos, "\nCan change speed:"); + for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) + pos += scnprintf(info + pos, size - pos, "\t%d", + CDROM_CAN(CDC_SELECT_SPEED) != 0); + + pos += scnprintf(info + pos, size - pos, "\nCan select disk:"); + for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) + pos += scnprintf(info + pos, size - pos, "\t%d", + CDROM_CAN(CDC_SELECT_DISC) != 0); + + pos += scnprintf(info + pos, size - pos, "\nCan read multisession:"); + for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) + pos += scnprintf(info + pos, size - pos, "\t%d", + CDROM_CAN(CDC_MULTI_SESSION) != 0); + + pos += scnprintf(info + pos, size - pos, "\nCan read MCN:\t"); + for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) + pos += scnprintf(info + pos, size - pos, "\t%d", + CDROM_CAN(CDC_MCN) != 0); + + pos += scnprintf(info + pos, size - pos, "\nReports media changed:"); + for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) + pos += scnprintf(info + pos, size - pos, "\t%d", + CDROM_CAN(CDC_MEDIA_CHANGED) != 0); + + pos += scnprintf(info + pos, size - pos, "\nCan play audio:\t"); + for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) + pos += scnprintf(info + pos, size - pos, "\t%d", + CDROM_CAN(CDC_PLAY_AUDIO) != 0); + + pos += scnprintf(info + pos, size - pos, "\nCan write CD-R:\t"); + for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) + pos += scnprintf(info + pos, size - pos, "\t%d", + CDROM_CAN(CDC_CD_R) != 0); + + pos += scnprintf(info + pos, size - pos, "\nCan write CD-RW:"); + for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) + pos += scnprintf(info + pos, size - pos, "\t%d", + CDROM_CAN(CDC_CD_RW) != 0); + + pos += scnprintf(info + pos, size - pos, "\nCan read DVD:\t"); + for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) + pos += scnprintf(info + pos, size - pos, "\t%d", + CDROM_CAN(CDC_DVD) != 0); + + pos += scnprintf(info + pos, size - pos, "\nCan write DVD-R:"); + for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) + pos += scnprintf(info + pos, size - pos, "\t%d", + CDROM_CAN(CDC_DVD_R) != 0); + + pos += scnprintf(info + pos, size - pos, "\nCan write DVD-RAM:"); + for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) + pos += scnprintf(info + pos, size - pos, "\t%d", + CDROM_CAN(CDC_DVD_RAM) != 0); + + pos += scnprintf(info + pos, size - pos, "\nCan read MRW:\t"); + for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) + pos += scnprintf(info + pos, size - pos, "\t%d", + CDROM_CAN(CDC_MRW) != 0); + + pos += scnprintf(info + pos, size - pos, "\nCan write MRW:\t"); + for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) + pos += scnprintf(info + pos, size - pos, "\t%d", + CDROM_CAN(CDC_MRW_W) != 0); + + pos += scnprintf(info + pos, size - pos, "\nCan write RAM:\t"); + for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) + pos += scnprintf(info + pos, size - pos, "\t%d", + CDROM_CAN(CDC_RAM) != 0); - strcpy(info+pos,"\n\n"); + scnprintf(info + pos, size - pos, "\n\n"); - return proc_dostring(ctl, write, filp, buffer, lenp, ppos); + return proc_dostring(ctl, write, filp, buffer, lenp, ppos); } /* Unfortunately, per device settings are not implemented through Regards dave - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |