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Alexey Kardashevskiy 87e91d6c6a KVM: PPC: Book3S: Suppress failed alloc warning in H_COPY_TOFROM_GUEST 
[ Upstream commit 792020907b11c6f9246c21977cab3bad985ae4b6 ]

H_COPY_TOFROM_GUEST is an hcall for an upper level VM to access its nested
VMs memory. The userspace can trigger WARN_ON_ONCE(!(gfp & __GFP_NOWARN))
in __alloc_pages() by constructing a tiny VM which only does
H_COPY_TOFROM_GUEST with a too big GPR9 (number of bytes to copy).

This silences the warning by adding __GFP_NOWARN.

Spotted by syzkaller.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Fabiano Rosas <farosas@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210901084550.1658699-1-aik@ozlabs.ru
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-01-27 10:54:22 +01:00
..
book3s_32_mmu_host.c
KVM: PPC: Book3S PR: Move kvmppc_mmu_init() into PR KVM
2020-03-19 16:39:52 +11:00
book3s_32_mmu.c
KVM: PPC: Use fallthrough;
2020-03-19 16:39:52 +11:00
book3s_32_sr.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266
2019-06-05 17:30:28 +02:00
book3s_64_mmu_host.c
KVM: PPC: Book3S PR: Move kvmppc_mmu_init() into PR KVM
2020-03-19 16:39:52 +11:00
book3s_64_mmu_hv.c
KVM: PPC: Book3S HV: Increase KVMPPC_NR_LPIDS on POWER8 and POWER9
2020-07-21 15:38:03 +10:00
book3s_64_mmu_radix.c
KVM: PPC: Book3S HV: Fix copy_tofrom_guest routines
2021-09-18 13:40:15 +02:00
book3s_64_mmu.c
KVM: PPC: Use fallthrough;
2020-03-19 16:39:52 +11:00
book3s_64_slb.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266
2019-06-05 17:30:28 +02:00
book3s_64_vio_hv.c
KVM: PPC: Fix clearing never mapped TCEs in realmode
2021-09-18 13:40:16 +02:00
book3s_64_vio.c
KVM: PPC: Book3S: Fix symbol undeclared warnings
2020-09-22 11:53:55 +10:00
book3s_emulate.c
KVM: PPC: Clean up redundant 'kvm_run' parameters
2020-05-27 11:39:31 +10:00
book3s_exports.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266
2019-06-05 17:30:28 +02:00
book3s_hv_builtin.c
KVM: PPC: Book3S HV: Prevent POWER7/8 TLB flush flushing SLB
2021-12-01 09:19:01 +01:00
book3s_hv_hmi.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 114
2019-05-24 17:39:01 +02:00
book3s_hv_interrupts.S
KVM: PPC: Book3S HV: Set LPCR[HDICE] before writing HDEC
2020-09-17 11:38:17 +10:00
book3s_hv_nested.c
KVM: PPC: Book3S: Suppress failed alloc warning in H_COPY_TOFROM_GUEST
2022-01-27 10:54:22 +01:00
book3s_hv_ras.c
powerpc/64s: Move HMI IRQ stat from percpu variable to paca.
2020-07-29 23:47:53 +10:00
book3s_hv_rm_mmu.c
KVM: PPC: Book3S HV: Fix TLB management on SMT8 POWER9 and POWER10 processors
2021-07-14 16:55:55 +02:00
book3s_hv_rm_xics.c
KVM: PPC: Book3S: Fix symbol undeclared warnings
2020-09-22 11:53:55 +10:00
book3s_hv_rm_xive.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
book3s_hv_rmhandlers.S
KVM: PPC: Book3S HV: Use GLOBAL_TOC for kvmppc_h_set_dabr/xdabr()
2021-11-26 10:39:18 +01:00
book3s_hv_tm_builtin.c
KVM: PPC: Book3S HV: Treat TM-related invalid form instructions on P9 like the valid ones
2020-03-19 16:39:52 +11:00
book3s_hv_tm.c
KVM: PPC: Book3S HV: Treat TM-related invalid form instructions on P9 like the valid ones
2020-03-19 16:39:52 +11:00
book3s_hv_uvmem.c
mm/memremap_pages: support multiple ranges per invocation
2020-10-13 18:38:28 -07:00
book3s_hv.c
KVM: PPC: Book3S: Suppress warnings when allocating too big memory slots
2022-01-27 10:54:22 +01:00
book3s_interrupts.S
PPC KVM update for 5.9
2020-08-09 13:24:02 -04:00
book3s_mmu_hpte.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266
2019-06-05 17:30:28 +02:00
book3s_paired_singles.c
KVM: PPC: Clean up redundant 'kvm_run' parameters
2020-05-27 11:39:31 +10:00
book3s_pr_papr.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
book3s_pr.c
KVM: PPC: Book3S: Fix symbol undeclared warnings
2020-09-22 11:53:55 +10:00
book3s_rmhandlers.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266
2019-06-05 17:30:28 +02:00
book3s_rtas.c
KVM: PPC: Book3S: Fix H_RTAS rets buffer overflow
2021-07-28 14:35:43 +02:00
book3s_segment.S
powerpc/64s/exception: Move KVM test to common code
2020-04-01 13:42:11 +11:00
book3s_xics.c
KVM: PPC: Book3S HV: XICS: Replace the 'destroy' method by a 'release' method
2020-09-03 14:12:48 +10:00
book3s_xics.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
book3s_xive_native.c
KVM: PPC: Book3S HV: XIVE: Fix possible oops when accessing ESB page
2020-11-16 23:28:30 +11:00
book3s_xive_template.c
powerpc/xive: Enforce load-after-store ordering when StoreEOI is active
2020-05-07 22:58:31 +10:00
book3s_xive.c
KVM: PPC: Book3S HV: XIVE: Fix vCPU id sanity check
2020-12-01 21:45:51 +11:00
book3s_xive.h
KVM: PPC: Book3S HV: XIVE: Make VP block size configurable
2019-10-22 16:29:02 +11:00
book3s.c
KVM: PPC: Don't return -ENOTSUPP to userspace in ioctls
2020-09-17 11:38:17 +10:00
book3s.h
KVM: PPC: Clean up redundant 'kvm_run' parameters
2020-05-27 11:39:31 +10:00
booke_emulate.c
KVM: PPC: Clean up redundant 'kvm_run' parameters
2020-05-27 11:39:31 +10:00
booke_interrupts.S
KVM: PPC: Clean up redundant kvm_run parameters in assembly
2020-07-23 15:50:01 +10:00
booke.c
KVM: PPC: Don't return -ENOTSUPP to userspace in ioctls
2020-09-17 11:38:17 +10:00
booke.h
KVM: PPC: Clean up redundant 'kvm_run' parameters
2020-05-27 11:39:31 +10:00
bookehv_interrupts.S
KVM: PPC: Clean up redundant kvm_run parameters in assembly
2020-07-23 15:50:01 +10:00
e500_emulate.c
KVM: PPC: Clean up redundant 'kvm_run' parameters
2020-05-27 11:39:31 +10:00
e500_mmu_host.c
KVM: Pass MMU notifier range flags to kvm_unmap_hva_range()
2020-08-21 18:03:47 -04:00
e500_mmu_host.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
e500_mmu.c
KVM: PPC: Kill kvmppc_ops::mmu_destroy() and kvmppc_mmu_destroy()
2020-03-19 16:43:07 +11:00
e500.c
KVM: PPC: Kill kvmppc_ops::mmu_destroy() and kvmppc_mmu_destroy()
2020-03-19 16:43:07 +11:00
e500.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
e500mc.c
KVM: PPC: Kill kvmppc_ops::mmu_destroy() and kvmppc_mmu_destroy()
2020-03-19 16:43:07 +11:00
emulate_loadstore.c
MIPS:
2020-06-12 11:05:52 -07:00
emulate.c
KVM: PPC: Clean up redundant 'kvm_run' parameters
2020-05-27 11:39:31 +10:00
fpu.S
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
irq.h
…
Kconfig
treewide: replace '---help---' in Kconfig files with 'help'
2020-06-14 01:57:21 +09:00
Makefile
KVM: PPC: Book3S HV: Support for running secure guests
2019-11-28 16:30:02 +11:00
mpic.c
KVM: Remove unnecessary asm/kvm_host.h includes
2020-03-16 17:57:34 +01:00
powerpc.c
KVM: PPC: Fix kvm_arch_vcpu_ioctl vcpu_load leak
2021-07-28 14:35:38 +02:00
timing.c
powerpc/kvm: no need to check return value of debugfs_create functions
2020-03-04 22:44:25 +11:00
timing.h
KVM: Remove unnecessary asm/kvm_host.h includes
2020-03-16 17:57:34 +01:00
tm.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174
2019-05-30 11:26:41 -07:00
trace_book3s.h
KVM: PPC: Book3S: Simplify external interrupt handling
2018-10-09 16:04:27 +11:00
trace_booke.h
KVM: PPC: Move and undef TRACE_INCLUDE_PATH/FILE
2018-11-07 23:04:38 +11:00
trace_hv.h
KVM: PPC: Fix typo on H_DISABLE_AND_GET hcall
2020-07-23 17:43:35 +10:00
trace_pr.h
KVM: PPC: Move and undef TRACE_INCLUDE_PATH/FILE
2018-11-07 23:04:38 +11:00
trace.h
KVM: PPC: Move and undef TRACE_INCLUDE_PATH/FILE
2018-11-07 23:04:38 +11:00