From: Alan Stern <stern@rowland.harvard.edu>
To: syzbot <syzbot+28748250ab47a8f04100@syzkaller.appspotmail.com>
Cc: bvanassche@acm.org, emilne@redhat.com,
gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org,
linux-usb@vger.kernel.org, martin.petersen@oracle.com,
syzkaller-bugs@googlegroups.com, tasos@tasossah.com,
usb-storage@lists.one-eyed-alien.net
Subject: Re: [syzbot] [usb-storage?] divide error in isd200_ata_command
Date: Wed, 28 Feb 2024 11:12:06 -0500 [thread overview]
Message-ID: <13add23d-af18-4f84-9f1a-043932a9712b@rowland.harvard.edu> (raw)
In-Reply-To: <0000000000008b026406126a4bbe@google.com>
On Tue, Feb 27, 2024 at 09:20:03PM -0800, syzbot wrote:
> Hello,
>
> syzbot tried to test the proposed patch but the build/boot failed:
>
> failed to checkout kernel repo https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/ on commit f2e367d6ad3b: failed to run ["git" "fetch" "--force" "--tags" "7b440d1b40dd93ea98b5af6bba55ffca63425216" "f2e367d6ad3b"]: exit status 128
> fatal: couldn't find remote ref f2e367d6ad3b
I'm going to guess this was a temporary failure and try again. If that
wasn't the case, something is seriously wrong somewhere. I had no
trouble accessing that commit using the git.kernel.org web interface.
Alan Stern
On Mon, Feb 26, 2024 at 01:42:26AM -0800, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: f2e367d6ad3b Merge tag 'for-6.8/dm-fix-3' of git://git.ker..
> git tree: upstream
#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/ f2e367d6ad3b
Index: usb-devel/drivers/usb/storage/isd200.c
===================================================================
--- usb-devel.orig/drivers/usb/storage/isd200.c
+++ usb-devel/drivers/usb/storage/isd200.c
@@ -1105,7 +1105,7 @@ static void isd200_dump_driveid(struct u
static int isd200_get_inquiry_data( struct us_data *us )
{
struct isd200_info *info = (struct isd200_info *)us->extra;
- int retStatus = ISD200_GOOD;
+ int retStatus;
u16 *id = info->id;
usb_stor_dbg(us, "Entering isd200_get_inquiry_data\n");
@@ -1137,6 +1137,13 @@ static int isd200_get_inquiry_data( stru
isd200_fix_driveid(id);
isd200_dump_driveid(us, id);
+ /* Prevent division by 0 in isd200_scsi_to_ata() */
+ if (id[ATA_ID_HEADS] == 0 || id[ATA_ID_SECTORS] == 0) {
+ usb_stor_dbg(us, " Invalid ATA Identify data\n");
+ retStatus = ISD200_ERROR;
+ goto Done;
+ }
+
memset(&info->InquiryData, 0, sizeof(info->InquiryData));
/* Standard IDE interface only supports disks */
@@ -1202,6 +1209,7 @@ static int isd200_get_inquiry_data( stru
}
}
+ Done:
usb_stor_dbg(us, "Leaving isd200_get_inquiry_data %08X\n", retStatus);
return(retStatus);
@@ -1481,22 +1489,27 @@ static int isd200_init_info(struct us_da
static int isd200_Initialization(struct us_data *us)
{
+ int rc = 0;
+
usb_stor_dbg(us, "ISD200 Initialization...\n");
/* Initialize ISD200 info struct */
- if (isd200_init_info(us) == ISD200_ERROR) {
+ if (isd200_init_info(us) < 0) {
usb_stor_dbg(us, "ERROR Initializing ISD200 Info struct\n");
+ rc = -ENOMEM;
} else {
/* Get device specific data */
- if (isd200_get_inquiry_data(us) != ISD200_GOOD)
+ if (isd200_get_inquiry_data(us) != ISD200_GOOD) {
usb_stor_dbg(us, "ISD200 Initialization Failure\n");
- else
+ rc = -EINVAL;
+ } else {
usb_stor_dbg(us, "ISD200 Initialization complete\n");
+ }
}
- return 0;
+ return rc;
}
next prev parent reply other threads:[~2024-02-28 16:12 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-26 9:42 [syzbot] [usb-storage?] divide error in isd200_ata_command syzbot
2024-02-26 10:59 ` Oliver Neukum
2024-02-26 18:13 ` Alan Stern
2024-02-27 2:46 ` Martin K. Petersen
2024-02-27 3:05 ` Alan Stern
2024-02-28 16:20 ` Oliver Neukum
2024-02-28 19:23 ` Alan Stern
2024-02-27 19:36 ` Alan Stern
2024-02-28 5:20 ` syzbot
2024-02-28 16:12 ` Alan Stern [this message]
2024-02-28 16:13 ` syzbot
2024-02-28 16:52 ` Aleksandr Nogikh
2024-02-28 19:18 ` Alan Stern
2024-02-29 0:33 ` syzbot
2024-02-29 19:30 ` [PATCH] USB: usb-storage: Prevent divide-by-0 " Alan Stern
2024-03-01 1:11 ` Martin K. Petersen
2024-03-01 11:36 ` PrasannaKumar Muralidharan
2024-02-29 15:40 ` [syzbot] [usb-storage?] divide " Aleksandr Nogikh
2024-02-29 16:12 ` Alan Stern
2024-02-29 17:57 ` Aleksandr Nogikh
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