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| author | James Bottomley <James.Bottomley@HansenPartnership.com> | 2008-05-22 12:34:41 +0100 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2008-05-23 16:17:06 -0500 |
| commit | 1f42ea7bc0ddfadebd9e1c5362b41b53902dbcb1 (patch) | |
| tree | 3b2ee1a6b64522cd073f14773086cec0b8d824a0 /drivers/scsi/scsi_sysfs.c | |
| parent | 7853099a70742b2a3c753282e5ccfbdda86cb29f (diff) | |
| download | linux-1f42ea7bc0ddfadebd9e1c5362b41b53902dbcb1.tar.bz2 | |
[SCSI] fix intermittent oops in scsi_bus_uevent
Reported-by: Sitsofe Wheeler <sitsofe@yahoo.com>
> BUG: unable to handle kernel paging request at e6f17fac
> IP: [<c02604d6>] scsi_bus_uevent+0x1/0x17
> *pde = 2714b163 *pte = 26f17160
> Oops: 0000 [#1] DEBUG_PAGEALLOC
> last sysfs file:
>
> Pid: 1, comm: swapper Not tainted (2.6.26-rc2-next-20080516skw #30)
> EIP: 0060:[<c02604d6>] EFLAGS: 00010282 CPU: 0
> EIP is at scsi_bus_uevent+0x1/0x17
> EAX: e6f18014 EBX: e6f18014 ECX: c02604d5 EDX: e7173000
> ESI: e7173000 EDI: e7173000 EBP: e7851ca0 ESP: e7851c90
> DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068
The problem is caused by:
commit b0ed43360fdca227048d88a08290365cb681c1a8
Author: Hannes Reinecke <hare@suse.de>
Date: Tue Mar 18 14:32:28 2008 +0100
[SCSI] add scsi_host and scsi_target to scsi_bus
which added scsi_bus_type to the struct scsi_target device. This
causes both the scsi_device and scsi_target to fire scsi_bus_uevents.
However, the actualy scsi_bus_uevent() call assumes blindly that it's
a struct scsi_device. Check for this and return immediately if it
isn't.
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/scsi/scsi_sysfs.c')
| -rw-r--r-- | drivers/scsi/scsi_sysfs.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c index 049103f1d16f..93d2b6714453 100644 --- a/drivers/scsi/scsi_sysfs.c +++ b/drivers/scsi/scsi_sysfs.c @@ -359,7 +359,12 @@ static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env) { - struct scsi_device *sdev = to_scsi_device(dev); + struct scsi_device *sdev; + + if (dev->type != &scsi_dev_type) + return 0; + + sdev = to_scsi_device(dev); add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type); return 0; |