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Haoyu Li 819cec1dc4 drivers: virt: acrn: hsm: Use kzalloc to avoid info leak in pmcmd_ioctl

In the "pmcmd_ioctl" function, three memory objects allocated by
kmalloc are initialized by "hcall_get_cpu_state", which are then
copied to user space. The initializer is indeed implemented in
"acrn_hypercall2" (arch/x86/include/asm/acrn.h). There is a risk of
information leakage due to uninitialized bytes.

Fixes: 3d679d5aec64 ("virt: acrn: Introduce interfaces to query C-states and P-states allowed by hypervisor")
Signed-off-by: Haoyu Li <lihaoyu499@gmail.com>
Cc: stable <stable@kernel.org>
Acked-by: Fei Li <fei1.li@intel.com>
Link: https://lore.kernel.org/r/20250130115811.92424-1-lihaoyu499@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2025-02-20 15:20:34 +01:00

acrn_drv.h

virt: acrn: Annotate struct vm_memory_region_batch with __counted_by

2023-10-08 22:46:04 -07:00

hsm.c

drivers: virt: acrn: hsm: Use kzalloc to avoid info leak in pmcmd_ioctl

2025-02-20 15:20:34 +01:00

hypercall.h

virt: acrn: Introduce interfaces for virtual device creating/destroying

2021-10-05 16:14:10 +02:00

ioeventfd.c

eventfd: simplify eventfd_signal()