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de55acd100993c70bb7c5ca9473b59cdc4debb20
linux/drivers/watchdog
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Peter Robinson de55acd100 watchdog: omap_wdt: fix null pointer dereference 
Fix issue from two patches overlapping causing a kernel oops

[ 3569.297449] Unable to handle kernel NULL pointer dereference at virtual address 00000088
[ 3569.306272] pgd = dc894000
[ 3569.309287] [00000088] *pgd=00000000
[ 3569.313104] Internal error: Oops: 5 [#1] SMP ARM
[ 3569.317986] Modules linked in: ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack ebtable_filter ebtable_nat ebtable_broute bridge stp llc ebtables ip6table_security ip6table_raw ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_filter ip6_tables iptable_security iptable_raw iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle musb_dsps cppi41 musb_hdrc phy_am335x udc_core phy_generic phy_am335x_control omap_sham omap_aes omap_rng omap_hwspinlock omap_mailbox hwspinlock_core musb_am335x omap_wdt at24 8250_omap leds_gpio cpufreq_dt smsc davinci_mdio mmc_block ti_cpsw cpsw_common ptp pps_core cpsw_ale davinci_cpdma omap_hsmmc omap_dma mmc_core i2c_dev
[ 3569.386293] CPU: 0 PID: 1429 Comm: wdctl Not tainted 4.3.0-0.rc7.git0.1.fc24.armv7hl #1
[ 3569.394740] Hardware name: Generic AM33XX (Flattened Device Tree)
[ 3569.401179] task: dbd11a00 ti: dbaac000 task.ti: dbaac000
[ 3569.406917] PC is at omap_wdt_get_timeleft+0xc/0x20 [omap_wdt]
[ 3569.413106] LR is at watchdog_ioctl+0x3cc/0x42c
[ 3569.417902] pc : [<bf0ab138>]    lr : [<c0739c54>]    psr: 600f0013
[ 3569.417902] sp : dbaadf18  ip : 00000003  fp : 7f5d3bbe
[ 3569.430014] r10: 00000000  r9 : 00000003  r8 : bef21ab8
[ 3569.435535] r7 : dbbc0f7c  r6 : dbbc0f18  r5 : bef21ab8  r4 : 00000000
[ 3569.442427] r3 : 00000000  r2 : 00000000  r1 : 8004570a  r0 : dbbc0f18
[ 3569.449323] Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
[ 3569.456858] Control: 10c5387d  Table: 9c894019  DAC: 00000051
[ 3569.462927] Process wdctl (pid: 1429, stack limit = 0xdbaac220)
[ 3569.469179] Stack: (0xdbaadf18 to 0xdbaae000)
[ 3569.473790] df00:                                                       bef21ab8 dbf60e38
[ 3569.482441] df20: dc91b840 8004570a bef21ab8 c03988a4 dbaadf48 dc854000 00000000 dd313850
[ 3569.491092] df40: ddf033b8 0000570a dc91b80b dbaadf3c dbf60e38 00000020 c0df9250 c0df6c48
[ 3569.499741] df60: dc91b840 8004570a 00000000 dc91b840 dc91b840 8004570a bef21ab8 00000003
[ 3569.508389] df80: 00000000 c03989d4 bef21b74 7f5d3bad 00000003 00000036 c020fcc4 dbaac000
[ 3569.517037] dfa0: 00000000 c020fb00 bef21b74 7f5d3bad 00000003 8004570a bef21ab8 00000001
[ 3569.525685] dfc0: bef21b74 7f5d3bad 00000003 00000036 00000001 00000000 7f5e4eb0 7f5d3bbe
[ 3569.534334] dfe0: 7f5e4f10 bef21a3c 7f5d0a54 b6e97e0c a00f0010 00000003 00000000 00000000
[ 3569.543038] [<bf0ab138>] (omap_wdt_get_timeleft [omap_wdt]) from [<c0739c54>] (watchdog_ioctl+0x3cc/0x42c)
[ 3569.553266] [<c0739c54>] (watchdog_ioctl) from [<c03988a4>] (do_vfs_ioctl+0x5bc/0x698)
[ 3569.561648] [<c03988a4>] (do_vfs_ioctl) from [<c03989d4>] (SyS_ioctl+0x54/0x7c)
[ 3569.569400] [<c03989d4>] (SyS_ioctl) from [<c020fb00>] (ret_fast_syscall+0x0/0x3c)
[ 3569.577413] Code: e12fff1e e52de004 e8bd4000 e5903060 (e5933088)
[ 3569.584089] ---[ end trace cec3039bd3ae610a ]---

Cc: <stable@vger.kernel.org> # v4.2+
Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Acked-by: Lars Poeschel <poeschel@lemonage.de>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2015-11-23 08:58:21 +01:00
..
acquirewdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
advantechwdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
alim1535_wdt.c
watchdog: remove DEFINE_PCI_DEVICE_TABLE macro
2014-01-28 19:07:07 +01:00
alim7101_wdt.c
watchdog: alim7101: register restart handler with kernel restart handler
2014-09-26 00:00:32 -07:00
ar7_wdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
at32ap700x_wdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
at91rm9200_wdt.c
Merge git://www.linux-watchdog.org/linux-watchdog
2015-09-11 15:12:59 -07:00
at91sam9_wdt.c
watchdog: at91sam9: get and use slow clock
2015-09-09 21:38:52 +02:00
at91sam9_wdt.h
watchdog: add a driver to support SAMA5D4 watchdog timer
2015-09-09 21:38:29 +02:00
ath79_wdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
bcm47xx_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
bcm63xx_wdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
bcm2835_wdt.c
watchdog: bcm2835: Fix poweroff behaviour
2015-09-28 10:56:05 +02:00
bcm7038_wdt.c
watchdog: Watchdog driver for Broadcom Set-Top Box
2015-10-27 16:12:02 +01:00
bcm_kona_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
bfin_wdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
booke_wdt.c
watchdog: booke_wdt: Use infrastructure to check timeout limits
2015-09-09 21:34:34 +02:00
cadence_wdt.c
watchdog: drop owner assignment from platform_drivers
2015-01-21 14:52:34 +01:00
coh901327_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
cpu5wdt.c
watchdog: delete non-required instances of include <linux/init.h>
2014-03-31 13:22:45 +02:00
cpwd.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
da9052_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
da9055_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
da9062_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
da9063_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
davinci_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
diag288_wdt.c
s390/diag: add a statistic for diagnose calls
2015-10-14 14:32:06 +02:00
digicolor_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
dw_wdt.c
watchdog: dw_wdt: keepalive the watchdog at write time
2015-06-22 15:54:31 +02:00
ep93xx_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
eurotechwdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
f71808e_wdt.c
watchdog: f71808e_wdt: Add support for Jetway JNF99 motherboard
2012-07-23 12:46:38 +02:00
gef_wdt.c
watchdog: Fix module autoload for OF platform driver
2015-09-28 10:56:01 +02:00
geodewdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
gpio_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
hpwdt.c
watchdog: hpwdt: Add support for WDIOC_SETOPTIONS
2015-06-22 15:54:36 +02:00
i6300esb.c
watchdog: delete non-required instances of include <linux/init.h>
2014-03-31 13:22:45 +02:00
ib700wdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
ibmasr.c
watchdog: fix checkpatch warnings and error
2014-03-31 13:31:06 +02:00
ie6xx_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
imgpdc_wdt.c
watchdog: imgpdc: Unregister restart handler on remove
2015-09-09 21:33:41 +02:00
imx2_wdt.c
watchdog: imx2_wdt: Use register definition in regmap_write()
2015-10-28 22:57:17 +01:00
indydog.c
watchdog: indydog: Simplify indydog_{start,stop}
2014-03-31 13:26:31 +02:00
intel_scu_watchdog.c
watchdog: intel_scu_watchdog: Remove unused variable
2014-03-31 13:26:56 +02:00
intel_scu_watchdog.h
watchdog: Use pr_<fmt> and pr_<level>
2012-03-27 19:59:26 +02:00
intel-mid_wdt.c
watchdog: intel-mid: add Magic Closure flag
2015-10-28 22:58:32 +01:00
iop_wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
it87_wdt.c
watchdog: it87_wdt: add IT8783 ID
2015-02-17 21:32:08 +01:00
it8712f_wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
iTCO_vendor_support.c
watchdog: Convert iTCO_wdt driver to mfd model
2012-05-09 17:20:09 +02:00
iTCO_vendor.h
watchdog: Convert iTCO_wdt driver to mfd model
2012-05-09 17:20:09 +02:00
iTCO_wdt.c
watchdog: iTCO_wdt: Add support for TCO on Intel Sunrisepoint
2015-08-11 15:03:52 +01:00
ixp4xx_wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
jz4740_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
Kconfig
watchdog: Watchdog driver for Broadcom Set-Top Box
2015-10-27 16:12:02 +01:00
kempld_wdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
ks8695_wdt.c
char: make misc_deregister a void function
2015-08-05 10:35:49 -07:00
lantiq_wdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
lpc18xx_wdt.c
watchdog: lpc18xx_wdt_get_timeleft() can be static
2015-09-09 21:36:17 +02:00
m54xx_wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
machzwd.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
Makefile
watchdog: Watchdog driver for Broadcom Set-Top Box
2015-10-27 16:12:02 +01:00
max63xx_wdt.c
watchdog: max63xx: dynamically allocate device
2015-06-29 11:50:53 +02:00
mena21_wdt.c
watchdog: Fix module autoload for OF platform driver
2015-09-28 10:56:01 +02:00
menf21bmc_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
meson_wdt.c
watchdog: drop owner assignment from platform_drivers
2015-01-21 14:52:34 +01:00
mixcomwd.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
moxart_wdt.c
watchdog: Fix module autoload for OF platform driver
2015-09-28 10:56:01 +02:00
mpc8xxx_wdt.c
watchdog: mpc8xxx: use better error code when watchdog cannot be enabled
2015-09-09 21:37:51 +02:00
mtk_wdt.c
watchdog: mtk_wdt: add wdt shutdown callback to disable wdt if enabled
2015-09-09 21:34:02 +02:00
mtx-1_wdt.c
watchdog: delete non-required instances of include <linux/init.h>
2014-03-31 13:22:45 +02:00
mv64x60_wdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
nuc900_wdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
nv_tco.c
watchdog: (nv_tco) add support for MCP79
2015-09-09 21:34:24 +02:00
nv_tco.h
watchdog: Add TCO support for nVidia chipsets
2011-01-12 13:51:23 +00:00
octeon-wdt-main.c
watchdog: octeon: use fixed length string for register names
2015-04-22 15:28:40 +02:00
octeon-wdt-nmi.S
WATCHDOG: Add watchdog driver for OCTEON SOCs
2010-08-05 13:26:22 +01:00
of_xilinx_wdt.c
watchdog: xilinx: Remove .owner field for driver
2014-10-20 20:43:42 +02:00
omap_wdt.c
watchdog: omap_wdt: fix null pointer dereference
2015-11-23 08:58:21 +01:00
omap_wdt.h
watchdog: omap_wdt: implement get_timeleft
2015-06-22 15:54:35 +02:00
orion_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
pc87413_wdt.c
watchdog: fix checkpatch warnings and error
2014-03-31 13:31:06 +02:00
pcwd_pci.c
watchdog: remove DEFINE_PCI_DEVICE_TABLE macro
2014-01-28 19:07:07 +01:00
pcwd_usb.c
watchdog: Remove unnecessary OOM messages
2014-03-31 13:23:19 +02:00
pcwd.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
pika_wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
pnx833x_wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
pnx4008_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
qcom-wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
rc32434_wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
rdc321x_wdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
retu_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
riowd.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
rn5t618_wdt.c
watchdog: add driver for Ricoh RN5T618 watchdog
2014-10-20 20:55:02 +02:00
rt2880_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
s3c2410_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
sa1100_wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
sama5d4_wdt.c
watchdog: add a driver to support SAMA5D4 watchdog timer
2015-09-09 21:38:29 +02:00
sb_wdog.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
sbc60xxwdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
sbc7240_wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
sbc8360.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
sbc_epx_c3.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
sbc_fitpc2_wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
sc520_wdt.c
watchdog: sc520_wdt: Remove unused variable
2014-03-31 13:27:34 +02:00
sc1200wdt.c
sc1200_wdt: Fix oops
2013-12-10 08:48:15 +01:00
sch311x_wdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
scx200_wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
shwdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
sirfsoc_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
smsc37b787_wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
softdog.c
watchdog: fix checkpatch warnings and error
2014-03-31 13:31:06 +02:00
sp805_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
sp5100_tco.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
sp5100_tco.h
watchdog: sp5100_tco: Set the AcpiMmioSel bitmask value to 1 instead of 2
2013-03-22 23:21:55 +01:00
st_lpc_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
stmp3xxx_rtc_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
sunxi_wdt.c
watchdog: sunxi: fix activation of system reset
2015-09-09 21:34:14 +02:00
tegra_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
ts72xx_wdt.c
char: make misc_deregister a void function
2015-08-05 10:35:49 -07:00
twl4030_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
txx9wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
ux500_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
via_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
w83627hf_wdt.c
watchdog: w83627hf_wdt: Add support for NCT6791 and NCT6792
2015-02-17 21:33:37 +01:00
w83877f_wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
w83977f_wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
wafer5823wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
watchdog_core.c
watchdog: watchdog_dev: Use device tree alias for naming watchdogs
2015-10-27 16:49:57 +01:00
watchdog_core.h
watchdog: Add multiple device support
2012-05-30 07:54:25 +02:00
watchdog_dev.c
watchdog: core: propagate ping error code to the user space
2015-11-03 14:36:14 +01:00
wd501p.h
…
wdrtas.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
wdt285.c
watchdog: wdt285: Fix variable type
2014-03-31 13:28:20 +02:00
wdt977.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
wdt_pci.c
watchdog: delete non-required instances of include <linux/init.h>
2014-03-31 13:22:45 +02:00
wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
wm831x_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
wm8350_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
xen_wdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00