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author | Krishnasamy, Somasundaram <Somasundaram.Krishnasamy@lsi.com> | 2011-02-28 18:13:22 -0500 |
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committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-04-14 13:01:59 -0700 |
commit | c289b973f884ea230b38b7aa1878adc2c77a32f2 (patch) | |
tree | eb03e5c6bf98ae39c24e786bc26ea8a3602a1509 /drivers/pci/pcie/aspm.c | |
parent | e7f208ebb98b445a92f0bbc2d420599671450f88 (diff) |
ses: Avoid kernel panic when lun 0 is not mapped
commit d1e12de804f9d8ad114786ca7c2ce593cba79891 upstream.
During device discovery, scsi mid layer sends INQUIRY command to LUN
0. If the LUN 0 is not mapped to host, it creates a temporary
scsi_device with LUN id 0 and sends REPORT_LUNS command to it. After
the REPORT_LUNS succeeds, it walks through the LUN table and adds each
LUN found to sysfs. At the end of REPORT_LUNS lun table scan, it will
delete the temporary scsi_device of LUN 0.
When scsi devices are added to sysfs, it calls add_dev function of all
the registered class interfaces. If ses driver has been registered,
ses_intf_add() of ses module will be called. This function calls
scsi_device_enclosure() to check the inquiry data for EncServ
bit. Since inquiry was not allocated for temporary LUN 0 scsi_device,
it will cause NULL pointer exception.
To fix the problem, sdev->inquiry is checked for NULL before reading it.
Signed-off-by: Somasundaram Krishnasamy <Somasundaram.Krishnasamy@lsi.com>
Signed-off-by: Babu Moger <babu.moger@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/pci/pcie/aspm.c')
0 files changed, 0 insertions, 0 deletions