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Patch to prevent NULL pointer dereference in sd_revalidate_disk (rhbz 754518)

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This commit is contained in:
Josh Boyer 2012-02-10 14:56:13 -05:00
parent 268ca99517
commit af1af57c46
2 changed files with 31 additions and 0 deletions
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9
kernel.spec
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@ -754,6 +754,9 @@ Patch21233: jbd2-clear-BH_Delay-and-BH_Unwritten-in-journal_unmap_buf.patch
#rhbz 787373
Patch21234: Bluetooth-Remove-bogus-inline-decl-from-l2cap_chan_connect.patch
#rhbz 754518
Patch21235: scsi-sd_revalidate_disk-prevent-NULL-ptr-deref.patch
# compat-wireless patches
Patch50000: compat-wireless-config-fixups.patch
Patch50001: compat-wireless-pr_fmt-warning-avoidance.patch
@ -1456,6 +1459,9 @@ ApplyPatch jbd2-clear-BH_Delay-and-BH_Unwritten-in-journal_unmap_buf.patch
#rhbz 787373
ApplyPatch Bluetooth-Remove-bogus-inline-decl-from-l2cap_chan_connect.patch
#rhbz 754518
ApplyPatch scsi-sd_revalidate_disk-prevent-NULL-ptr-deref.patch
# END OF PATCH APPLICATIONS
%endif
@ -2326,6 +2332,9 @@ fi
# ||----w |
# || ||
%changelog
* Fri Feb 10 2012 Josh Boyer <jwboyer@redhat.com>
- Patch to prevent NULL pointer dereference in sd_revalidate_disk (rhbz 754518)
* Fri Feb 10 2012 Josh Boyer <jwboyer@redhat.com> - 3.3.0-0.rc3.git2.1
- Linux 3.3-rc3-git2 (upstream 612b8507c5d545feed2437b3d2239929cac7688d)

22
scsi-sd_revalidate_disk-prevent-NULL-ptr-deref.patch Normal file
View File

@ -0,0 +1,22 @@
--- a/drivers/scsi/sd.c
+++ a/drivers/scsi/sd.c
@@ -2362,13 +2362,18 @@ static int sd_try_extended_inquiry(struct scsi_device *sdp)
static int sd_revalidate_disk(struct gendisk *disk)
{
struct scsi_disk *sdkp = scsi_disk(disk);
- struct scsi_device *sdp = sdkp->device;
+ struct scsi_device *sdp;
unsigned char *buffer;
unsigned flush = 0;
SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp,
"sd_revalidate_disk\n"));
+ if (!sdkp)
+ goto out;
+
+ sdp = sdkp->device;
+
/*
* If the device is offline, don't try and read capacity or any
* of the other niceties.