iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
linux/arch/powerpc/kvm
History
Alexey Kardashevskiy b8e5376c27 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 09:19:48 +01:00
..
book3s_32_mmu_host.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266
2019-06-05 17:30:28 +02:00
book3s_32_mmu.c
KVM: PPC: Book3S: Mark expected switch fall-through
2019-08-23 15:57:24 +10:00
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
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266
2019-06-05 17:30:28 +02:00
book3s_64_mmu_hv.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266
2019-06-05 17:30:28 +02:00
book3s_64_mmu_radix.c
KVM: PPC: Book3S HV: Close race with page faults around memslot flushes
2020-10-01 13:18:05 +02:00
book3s_64_mmu.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266
2019-06-05 17:30:28 +02:00
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
2021-09-22 12:26:25 +02:00
book3s_64_vio.c
KVM: PPC: Book3S: Fix some RCU-list locks
2020-06-24 17:50:34 +02:00
book3s_emulate.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266
2019-06-05 17:30:28 +02:00
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 09:23:28 +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
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266
2019-06-05 17:30:28 +02:00
book3s_hv_nested.c
KVM: PPC: Book3S: Suppress failed alloc warning in H_COPY_TOFROM_GUEST
2022-01-27 09:19:48 +01:00
book3s_hv_ras.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
book3s_hv_rm_mmu.c
KVM: PPC: Book3S HV: Fix TLB management on SMT8 POWER9 and POWER10 processors
2021-07-14 16:53:14 +02:00
book3s_hv_rm_xics.c
KVM: PPC: Book3S HV: use smp_mb() when setting/clearing host_ipi flag
2019-09-24 12:46:26 +10:00
book3s_hv_rm_xive.c
…
book3s_hv_rmhandlers.S
KVM: PPC: Book3S HV: Use GLOBAL_TOC for kvmppc_h_set_dabr/xdabr()
2021-11-26 10:47:20 +01:00
book3s_hv_tm_builtin.c
KVM: PPC: Book3S HV: Treat TM-related invalid form instructions on P9 like the valid ones
2020-10-01 13:17:44 +02:00
book3s_hv_tm.c
KVM: PPC: Book3S HV: Treat TM-related invalid form instructions on P9 like the valid ones
2020-10-01 13:17:44 +02:00
book3s_hv.c
KVM: PPC: Book3S HV Nested: Reflect guest PMU in-use to L0 when guest SPRs are live
2021-09-22 12:26:25 +02:00
book3s_interrupts.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266
2019-06-05 17:30:28 +02:00
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
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266
2019-06-05 17:30:28 +02:00
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 PR: Free shared page if mmu initialization fails
2020-02-11 04:35:39 -08:00
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 13:30:59 +02:00
book3s_segment.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266
2019-06-05 17:30:28 +02:00
book3s_xics.c
scripts/spelling.txt: drop "sepc" from the misspelling list
2019-07-12 11:05:41 -07:00
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
2020-12-02 08:49:46 +01:00
book3s_xive_template.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
book3s_xive.c
KVM: PPC: Book3S HV: XIVE: Set kvm->arch.xive when VPs are allocated
2019-12-13 08:42:59 +01:00
book3s_xive.h
KVM: PPC: Book3S HV: XIVE: Ensure VP isn't already in use
2019-10-15 16:09:11 +11:00
book3s.c
KVM: Pass MMU notifier range flags to kvm_unmap_hva_range()
2020-08-26 10:41:08 +02:00
book3s.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 98
2019-05-24 17:37:54 +02:00
booke_emulate.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266
2019-06-05 17:30:28 +02:00
booke_interrupts.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266
2019-06-05 17:30:28 +02:00
booke.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266
2019-06-05 17:30:28 +02:00
booke.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266
2019-06-05 17:30:28 +02:00
bookehv_interrupts.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266
2019-06-05 17:30:28 +02:00
e500_emulate.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
e500_mmu_host.c
KVM: Pass MMU notifier range flags to kvm_unmap_hva_range()
2020-08-26 10:41:08 +02:00
e500_mmu_host.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
e500_mmu.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
e500.c
KVM: Assert that struct kvm_vcpu is always as offset zero
2019-08-22 10:09:27 +02:00
e500.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
e500mc.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
emulate_loadstore.c
KVM: PPC: Remove set but not used variable 'ra', 'rs', 'rt'
2020-02-24 08:36:51 +01:00
emulate.c
Merge remote-tracking branch 'remotes/powerpc/topic/ppc-kvm' into kvm-ppc-next
2019-08-23 14:08:04 +10:00
fpu.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
irq.h
…
Kconfig
powerpc/Kconfig: Clean up formatting
2019-07-04 16:55:10 +10:00
Makefile
KVM: PPC: Book3S HV: Add a new KVM device for the XIVE native exploitation mode
2019-04-30 19:35:16 +10:00
mpic.c
…
powerpc.c
KVM: PPC: Fix kvm_arch_vcpu_ioctl vcpu_load leak
2021-07-28 13:30:56 +02:00
timing.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266
2019-06-05 17:30:28 +02:00
timing.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266
2019-06-05 17:30:28 +02:00
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: Move and undef TRACE_INCLUDE_PATH/FILE
2018-11-07 23:04:38 +11:00
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