Robert Richter d57c4ca8b0 oprofile, x86: Fix nmi-unsafe callgraph support ... commit a0e3e70243 upstream. Backport for stable kernel v2.6.32.y to v2.6.36.y. Current oprofile's x86 callgraph support may trigger page faults throwing the BUG_ON(in_nmi()) message below. This patch fixes this by using the same nmi-safe copy-from-user code as in perf. ------------[ cut here ]------------ kernel BUG at .../arch/x86/kernel/traps.c:436! invalid opcode: 0000 [#1] SMP last sysfs file: /sys/devices/pci0000:00/0000:00:0a.0/0000:07:00.0/0000:08:04.0/net/eth0/broadcast CPU 5 Modules linked in: Pid: 8611, comm: opcontrol Not tainted 2.6.39-00007-gfe47ae7 #1 Advanced Micro Device Anaheim/Anaheim RIP: 0010:[<ffffffff813e8e35>] [<ffffffff813e8e35>] do_nmi+0x22/0x1ee RSP: 0000:ffff88042fd47f28 EFLAGS: 00010002 RAX: ffff88042c0a7fd8 RBX: 0000000000000001 RCX: 00000000c0000101 RDX: 00000000ffff8804 RSI: ffffffffffffffff RDI: ffff88042fd47f58 RBP: ffff88042fd47f48 R08: 0000000000000004 R09: 0000000000001484 R10: 0000000000000001 R11: 0000000000000000 R12: ffff88042fd47f58 R13: 0000000000000000 R14: ffff88042fd47d98 R15: 0000000000000020 FS: 00007fca25e56700(0000) GS:ffff88042fd40000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000074 CR3: 000000042d28b000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process opcontrol (pid: 8611, threadinfo ffff88042c0a6000, task ffff88042c532310) Stack: 0000000000000000 0000000000000001 ffff88042c0a7fd8 0000000000000000 ffff88042fd47de8 ffffffff813e897a 0000000000000020 ffff88042fd47d98 0000000000000000 ffff88042c0a7fd8 ffff88042fd47de8 0000000000000074 Call Trace: <NMI> [<ffffffff813e897a>] nmi+0x1a/0x20 [<ffffffff813f08ab>] ? bad_to_user+0x25/0x771 <<EOE>> Code: ff 59 5b 41 5c 41 5d c9 c3 55 65 48 8b 04 25 88 b5 00 00 48 89 e5 41 55 41 54 49 89 fc 53 48 83 ec 08 f6 80 47 e0 ff ff 04 74 04 <0f> 0b eb fe 81 80 44 e0 ff ff 00 00 01 04 65 ff 04 25 c4 0f 01 RIP [<ffffffff813e8e35>] do_nmi+0x22/0x1ee RSP <ffff88042fd47f28> ---[ end trace ed6752185092104b ]--- Kernel panic - not syncing: Fatal exception in interrupt Pid: 8611, comm: opcontrol Tainted: G D 2.6.39-00007-gfe47ae7 #1 Call Trace: <NMI> [<ffffffff813e5e0a>] panic+0x8c/0x188 [<ffffffff813e915c>] oops_end+0x81/0x8e [<ffffffff8100403d>] die+0x55/0x5e [<ffffffff813e8c45>] do_trap+0x11c/0x12b [<ffffffff810023c8>] do_invalid_op+0x91/0x9a [<ffffffff813e8e35>] ? do_nmi+0x22/0x1ee [<ffffffff8131e6fa>] ? oprofile_add_sample+0x83/0x95 [<ffffffff81321670>] ? op_amd_check_ctrs+0x4f/0x2cf [<ffffffff813ee4d5>] invalid_op+0x15/0x20 [<ffffffff813e8e35>] ? do_nmi+0x22/0x1ee [<ffffffff813e8e7a>] ? do_nmi+0x67/0x1ee [<ffffffff813e897a>] nmi+0x1a/0x20 [<ffffffff813f08ab>] ? bad_to_user+0x25/0x771 <<EOE>> Cc: John Lumby <johnlumby@hotmail.com> Cc: Maynard Johnson <maynardj@us.ibm.com> Signed-off-by: Robert Richter <robert.richter@amd.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Willy Tarreau <w@1wt.eu>		2012-02-11 15:38:13 +01:00
..
alpha	alpha: fix several security issues	2012-02-11 15:37:38 +01:00
arm	ARM: 6891/1: prevent heap corruption in OABI semtimedop	2012-02-11 15:37:17 +01:00
avr32	avr32: nmi_enter() without nmi_exit()	2008-09-19 20:08:08 +02:00
blackfin	Blackfin arch: Fix PM building on BF52x: No ROTWE on BF52x, add USBWE	2008-08-28 17:32:01 +08:00
cris	Rename old_readdir to sys_old_readdir	2009-01-18 10:35:31 -08:00
frv	FRV: Wire up new system calls	2008-08-01 13:03:49 -07:00
h8300	Rename old_readdir to sys_old_readdir	2009-01-18 10:35:31 -08:00
ia64	tioca: Fix assignment from incompatible pointer warnings	2011-04-30 16:53:37 +02:00
m32r	m32r/kernel/: cleanups	2008-09-27 18:27:21 +09:00
m68k	tty: Mark generic_serial users as BROKEN	2009-11-09 16:52:18 -08:00
m68knommu	m68knommu: set NO_DMA	2009-02-06 14:00:35 -08:00
mips	MIPS: CVE-2009-0029: Enable syscall wrappers	2009-05-08 14:54:35 -07:00
mn10300	Rename old_readdir to sys_old_readdir	2009-01-18 10:35:31 -08:00
parisc	set memory ranges in N_NORMAL_MEMORY when onlined	2012-02-11 15:37:10 +01:00
powerpc	powerpc: pseries: Fix kexec on machines with more than 4TB of RAM	2012-02-11 15:37:41 +01:00
s390	KVM: s390: check cpu_id prior to using it	2012-02-11 15:37:46 +01:00
sh	Remove __attribute__((weak)) from sys_pipe/sys_pipe2	2009-01-18 10:35:33 -08:00
sparc	compat: Make compat_alloc_user_space() incorporate the access_ok()	2010-09-20 13:03:21 -07:00
sparc64	sparc64: Reschedule KGDB capture to a software interrupt.	2009-06-11 20:01:15 -07:00
um	um: fix ubd cow size	2012-02-11 15:37:48 +01:00
x86	oprofile, x86: Fix nmi-unsafe callgraph support	2012-02-11 15:38:13 +01:00
xtensa	remove unneeded #include <linux/ide.h>'s	2008-08-05 18:17:00 +02:00
.gitignore	arch: Ignore arch/i386 and arch/x86_64	2008-01-19 21:29:39 -08:00
Kconfig	System call wrapper infrastructure	2009-01-18 10:35:33 -08:00