Brian King 48f797de55 powerpc: Check for valid hugepage size in hugetlb_get_unmapped_area ... It looks like most of the hugetlb code is doing the correct thing if hugepages are not supported, but the mmap code is not. If we get into the mmap code when hugepages are not supported, such as in an LPAR which is running Active Memory Sharing, we can oops the kernel. This fixes the oops being seen in this path. oops: Kernel access of bad area, sig: 11 [#1] SMP NR_CPUS=1024 NUMA pSeries Modules linked in: nfs(N) lockd(N) nfs_acl(N) sunrpc(N) ipv6(N) fuse(N) loop(N) dm_mod(N) sg(N) ibmveth(N) sd_mod(N) crc_t10dif(N) ibmvscsic(N) scsi_transport_srp(N) scsi_tgt(N) scsi_mod(N) Supported: No NIP: c000000000038d60 LR: c00000000003945c CTR: c0000000000393f0 REGS: c000000077e7b830 TRAP: 0300 Tainted: G (2.6.27.5-bz50170-2-ppc64) MSR: 8000000000009032 <EE,ME,IR,DR> CR: 44000448 XER: 20000001 DAR: c000002000af90a8, DSISR: 0000000040000000 TASK = c00000007c1b8600[4019] 'hugemmap01' THREAD: c000000077e78000 CPU: 6 GPR00: 0000001fffffffe0 c000000077e7bab0 c0000000009a4e78 0000000000000000 GPR04: 0000000000010000 0000000000000001 00000000ffffffff 0000000000000001 GPR08: 0000000000000000 c000000000af90c8 0000000000000001 0000000000000000 GPR12: 000000000000003f c000000000a73880 0000000000000000 0000000000000000 GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000010000 GPR20: 0000000000000000 0000000000000003 0000000000010000 0000000000000001 GPR24: 0000000000000003 0000000000000000 0000000000000001 ffffffffffffffb5 GPR28: c000000077ca2e80 0000000000000000 c00000000092af78 0000000000010000 NIP [c000000000038d60] .slice_get_unmapped_area+0x6c/0x4e0 LR [c00000000003945c] .hugetlb_get_unmapped_area+0x6c/0x80 Call Trace: [c000000077e7bbc0] [c00000000003945c] .hugetlb_get_unmapped_area+0x6c/0x80 [c000000077e7bc30] [c000000000107e30] .get_unmapped_area+0x64/0xd8 [c000000077e7bcb0] [c00000000010b140] .do_mmap_pgoff+0x140/0x420 [c000000077e7bd80] [c00000000000bf5c] .sys_mmap+0xc4/0x140 [c000000077e7be30] [c0000000000086b4] syscall_exit+0x0/0x40 Instruction dump: fac1ffb0 fae1ffb8 fb01ffc0 fb21ffc8 fb41ffd0 fb61ffd8 fb81ffe0 fbc1fff0 fbe1fff8 f821fef1 f8c10158 f8e10160 <7d49002e> f9010168 e92d01b0 eb4902b0 Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>		2008-12-16 13:48:18 +11:00
..
boot	powerpc/40x: Add proper BOOTCFLAGS for cuboot-acadia	2008-12-11 07:34:22 -05:00
configs	powerpc/83xx: Enable FIXED_PHY in mpc834x_itx and mpc83xx defconfigs	2008-12-04 18:47:09 -06:00
include/asm	Merge branch 'kvm-updates/2.6.28' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm	2008-12-02 15:56:17 -08:00
kernel	powerpc/fsl-booke: Fix problem with _tlbil_va being interrupted	2008-12-13 17:02:47 -06:00
kvm	KVM: ppc: stop leaking host memory on VM exit	2008-11-25 12:02:48 +02:00
lib	powerpc: Fix DMA offset for non-coherent DMA	2008-10-14 10:35:26 +11:00
math-emu
mm	powerpc: Check for valid hugepage size in hugetlb_get_unmapped_area	2008-12-16 13:48:18 +11:00
oprofile	powerpc/cell/OProfile: Fix on-stack array size in activate spu profiling function	2008-10-31 16:13:51 +11:00
platforms	powerpc/cell: Fix GDB watchpoints, again	2008-12-01 09:40:18 +11:00
sysdev	powerpc: Use physical cpu id when setting the processor affinity	2008-12-02 15:50:40 -08:00
xmon	powerpc: Fix compile errors with CONFIG_BUG=n	2008-10-31 21:34:09 +11:00
Kconfig	Merge commit 'v2.6.28-rc2' into tracing/urgent	2008-10-27 10:50:54 +01:00
Kconfig.debug
Makefile	ftrace: rename FTRACE to FUNCTION_TRACER	2008-10-20 18:27:03 +02:00