Adrian Hunter 7c7cfdcf7f scsi: ufs: Fix NULL pointer dereference in ufshcd_config_vreg_hpm() ... Fix the following BUG: [ 187.065689] BUG: kernel NULL pointer dereference, address: 000000000000001c [ 187.065790] RIP: 0010:ufshcd_vreg_set_hpm+0x3c/0x110 [ufshcd_core] [ 187.065938] Call Trace: [ 187.065959] ufshcd_resume+0x72/0x290 [ufshcd_core] [ 187.065980] ufshcd_system_resume+0x54/0x140 [ufshcd_core] [ 187.065993] ? pci_pm_restore+0xb0/0xb0 [ 187.066005] ufshcd_pci_resume+0x15/0x20 [ufshcd_pci] [ 187.066017] pci_pm_thaw+0x4c/0x90 [ 187.066030] dpm_run_callback+0x5b/0x150 [ 187.066043] device_resume+0x11b/0x220 Voltage regulators are optional, so functions must check they exist before dereferencing. Note this issue is hidden if CONFIG_REGULATORS is not set, because the offending code is optimised away. Notes for stable: The issue first appears in commit 57d104c153 ("ufs: add UFS power management support") but is inadvertently fixed in commit 60f0187031 ("scsi: ufs: disable vccq if it's not needed by UFS device") which in turn was reverted by commit 730679817d ("Revert "scsi: ufs: disable vccq if it's not needed by UFS device""). So fix applies v3.18 to v4.5 and v5.1+ Fixes: 57d104c153 ("ufs: add UFS power management support") Fixes: 730679817d ("Revert "scsi: ufs: disable vccq if it's not needed by UFS device"") Cc: stable@vger.kernel.org Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>		2019-08-14 22:03:21 -04:00
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cdns-pltfrm.c
Kconfig
Makefile
tc-dwc-g210-pci.c
tc-dwc-g210-pltfrm.c
tc-dwc-g210.c
tc-dwc-g210.h
ufs_bsg.c
ufs_bsg.h
ufs_quirks.h
ufs-hisi.c
ufs-hisi.h
ufs-mediatek.c
ufs-mediatek.h
ufs-qcom.c
ufs-qcom.h
ufs-sysfs.c
ufs-sysfs.h
ufs.h
ufshcd-dwc.c
ufshcd-dwc.h
ufshcd-pci.c
ufshcd-pltfrm.c
ufshcd-pltfrm.h
ufshcd.c
ufshcd.h
ufshci-dwc.h
ufshci.h
unipro.h