Robert Richter 0bbf5c7025 oprofile: Fix crash when unloading module (hr timer mode) ... commit 87121ca504 upstream. Oprofile may crash in a KVM guest while unlaoding modules. This happens if oprofile_arch_init() fails and oprofile switches to the hr timer mode as a fallback. In this case oprofile_arch_exit() is called, but it never was initialized properly which causes the crash. This patch fixes this. oprofile: using timer interrupt. BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 IP: [<ffffffff8123c226>] unregister_syscore_ops+0x41/0x58 PGD 41da3f067 PUD 41d80e067 PMD 0 Oops: 0002 [#1] PREEMPT SMP CPU 5 Modules linked in: oprofile(-) Pid: 2382, comm: modprobe Not tainted 3.1.0-rc7-00018-g709a39d #18 Advanced Micro Device Anaheim/Anaheim RIP: 0010:[<ffffffff8123c226>] [<ffffffff8123c226>] unregister_syscore_ops+0x41/0x58 RSP: 0018:ffff88041de1de98 EFLAGS: 00010296 RAX: 0000000000000000 RBX: ffffffffa00060e0 RCX: dead000000200200 RDX: 0000000000000000 RSI: dead000000100100 RDI: ffffffff8178c620 RBP: ffff88041de1dea8 R08: 0000000000000001 R09: 0000000000000082 R10: 0000000000000000 R11: ffff88041de1dde8 R12: 0000000000000080 R13: fffffffffffffff5 R14: 0000000000000001 R15: 0000000000610210 FS: 00007f9ae5bef700(0000) GS:ffff88042fd40000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000000000000008 CR3: 000000041ca44000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process modprobe (pid: 2382, threadinfo ffff88041de1c000, task ffff88042db6d040) Stack: ffff88041de1deb8 ffffffffa0006770 ffff88041de1deb8 ffffffffa000251e ffff88041de1dec8 ffffffffa00022c2 ffff88041de1ded8 ffffffffa0004993 ffff88041de1df78 ffffffff81073115 656c69666f72706f 0000000000610200 Call Trace: [<ffffffffa000251e>] op_nmi_exit+0x15/0x17 [oprofile] [<ffffffffa00022c2>] oprofile_arch_exit+0xe/0x10 [oprofile] [<ffffffffa0004993>] oprofile_exit+0x13/0x15 [oprofile] [<ffffffff81073115>] sys_delete_module+0x1c3/0x22f [<ffffffff811bf09e>] ? trace_hardirqs_on_thunk+0x3a/0x3f [<ffffffff8148070b>] system_call_fastpath+0x16/0x1b Code: 20 c6 78 81 e8 c5 cc 23 00 48 8b 13 48 8b 43 08 48 be 00 01 10 00 00 00 ad de 48 b9 00 02 20 00 00 00 ad de 48 c7 c7 20 c6 78 81 89 42 08 48 89 10 48 89 33 48 89 4b 08 e8 a6 c0 23 00 5a 5b RIP [<ffffffff8123c226>] unregister_syscore_ops+0x41/0x58 RSP <ffff88041de1de98> CR2: 0000000000000008 ---[ end trace 06d4e95b6aa3b437 ]--- Signed-off-by: Robert Richter <robert.richter@amd.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>		2011-12-09 08:52:50 -08:00
..
accessibility
acpi	ACPI atomicio: Convert width in bits to bytes in __acpi_ioremap_fast()	2011-11-11 09:37:11 -08:00
amba
ata	ata_piix: make DVD Drive recognisable on systems with Intel Sandybridge chipsets(v2)	2011-11-11 09:35:50 -08:00
atm
auxdisplay
base	drivers/base/node.c: fix compilation error with older versions of gcc	2011-11-26 09:09:59 -08:00
bcma
block	xen/blkback: Report VBD_WSECT (wr_sect) properly.	2011-11-11 09:37:07 -08:00
bluetooth	btusb: add device entry for Broadcom SoftSailing	2011-11-11 09:36:43 -08:00
cdrom
char	TPM: Zero buffer after copying to userspace	2011-10-03 11:40:58 -07:00
clk
clocksource
connector
cpufreq	drivers/cpufreq/pcc-cpufreq.c: avoid NULL pointer dereference	2011-10-03 11:40:31 -07:00
cpuidle
crypto	crypto: mv_cesa - fix hashing of chunks > 1920 bytes	2011-12-09 08:52:20 -08:00
dca
dio
dma
edac	i7core_edac: fixed typo in error count calculation	2011-08-29 13:29:06 -07:00
eisa
firewire	firewire: sbp2: fix panic after rmmod with slow targets	2011-10-25 07:10:16 +02:00
firmware	firmware: Sigma: Fix endianess issues	2011-12-09 08:52:39 -08:00
gpio	gpio: wm831x: add a missing break in wm831x_gpio_dbg_show	2011-07-15 14:03:30 -06:00
gpu	drm/radeon/kms: add some loop timeouts in pageflip code	2011-12-09 08:52:38 -08:00
hid	HID: Correct General touch PID	2011-12-09 08:52:41 -08:00
hwmon	hwmon: (coretemp) Fix oops on driver load	2011-12-09 08:52:34 -08:00
hwspinlock	hwspinlock/core: use a mutex to protect the radix tree	2011-11-11 09:36:31 -08:00
i2c	i2c-algo-bit: Generate correct i2c address sequence for 10-bit target	2011-12-09 08:52:19 -08:00
ide	ide-disk: Fix request requeuing	2011-10-16 14:14:51 -07:00
idle
ieee802154
infiniband	cxgb3i: convert cdev->l2opt to use rcu to prevent NULL dereference	2011-10-03 11:41:08 -07:00
input	input: pmic8xxx-pwrkey: Do not use mfd_get_data()	2011-07-05 10:38:43 +02:00
isdn	net: Audit drivers to identify those needing IFF_TX_SKB_SHARING cleared	2011-08-15 18:31:38 -07:00
leds	Revert "leds: save the delay values after a successful call to blink_set()"	2011-11-21 14:31:19 -08:00
lguest
macintosh
mca
md	md/raid5: abort any pending parity operations when array fails.	2011-11-21 14:31:22 -08:00
media	saa7164: Add support for another HVR2200 hardware revision	2011-11-26 09:09:53 -08:00
memstick
message
mfd	revert "mfd: Fix twl4030 dependencies for audio codec"	2011-12-09 08:52:35 -08:00
misc	pcie-gadget-spear: Add "platform:" prefix for platform modalias	2011-11-26 09:09:59 -08:00
mmc	mmc: core: ext_csd.raw_* used in comparison but never set	2011-11-11 09:35:23 -08:00
mtd	mtd: nand_base: always initialise oob_poi before writing OOB data	2011-11-11 09:37:19 -08:00
net	rt2x00: Fix efuse EEPROM reading on PPC32.	2011-12-09 08:52:30 -08:00
nfc
nubus
of
oprofile	oprofile: Fix crash when unloading module (hr timer mode)	2011-12-09 08:52:50 -08:00
parisc
parport
pci	PCI hotplug: shpchp: don't blindly claim non-AMD 0x7450 device IDs	2011-12-09 08:52:22 -08:00
pcmcia	pcmcia: pxa2xx/vpac270: free gpios on exist rather than requesting	2011-07-11 14:26:34 +08:00
platform	WMI: properly cleanup devices to avoid crashes	2011-11-11 09:36:09 -08:00
pnp
power	drivers/power/ds2780_battery.c: fix deadlock upon insertion and removal	2011-11-11 09:36:32 -08:00
pps
ps3
ptp
rapidio	rapidio: fix use of non-compatible registers	2011-10-03 11:39:46 -07:00
regulator	regulator: tps65910: Add missing breaks in switch/case	2011-10-03 11:40:01 -07:00
rtc	rtc: Disable the alarm in the hardware	2011-12-09 08:52:48 -08:00
s390	ccwgroup: move attributes to attribute group	2011-11-11 09:36:09 -08:00
sbus
scsi	SCSI: Silencing 'killing requests for dead queue'	2011-12-09 08:52:36 -08:00
sfi
sh	drivers: sh: resume enabled clocks fix	2011-06-14 15:15:25 +09:00
sn
spi	spi/s3c64xx: Bug fix for SPI with different FIFO level	2011-07-06 15:03:08 +09:00
ssb	ssb: fix init regression of hostmode PCI core	2011-07-07 13:06:08 -04:00
staging	Staging: comedi: fix signal handling in read and write	2011-12-09 08:52:40 -08:00
target	tcm_loop: Add explict read buffer memset for SCF_SCSI_CONTROL_SG_IO_CDB	2011-11-11 09:37:01 -08:00
tc
telephony
thermal
tty	TTY: ldisc, wait for ldisc infinitely in hangup	2011-11-26 09:09:58 -08:00
uio
usb	xHCI: fix bug in xhci_clear_command_ring()	2011-12-09 08:52:43 -08:00
uwb
vhost
video	viafb: correct sync polarity for OLPC DCON	2011-12-09 08:52:23 -08:00
virtio	virtio-pci: fix use after free	2011-11-21 14:31:14 -08:00
vlynq
w1	drivers/power/ds2780_battery.c: add a nolock function to w1 interface	2011-11-11 09:36:32 -08:00
watchdog	watchdog: shwdt: fix usage of mod_timer	2011-08-04 21:58:42 -07:00
xen	xen-gntalloc: signedness bug in add_grefs()	2011-11-21 14:31:24 -08:00
zorro	zorro: Defer device_register() until all devices have been identified	2011-10-03 11:40:57 -07:00
Kconfig
Makefile