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kern: use fix usage of incorrect page table for UserBuffer ipc

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This commit is contained in:
Michael Scire 2021-03-13 15:08:38 -08:00
parent deb4aece9a
commit 021d4c88fa
1 changed files with 5 additions and 2 deletions
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7
libraries/libmesosphere/source/kern_k_server_session.cpp
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@ -771,6 +771,9 @@ namespace ams::kern {
/* NOTE: Session is used only for debugging, and so may go unused. */
MESOSPHERE_UNUSED(session);
/* NOTE: Source page table is not used, and so may go unused. */
MESOSPHERE_UNUSED(src_page_table);
/* Determine the message buffers. */
u32 *dst_msg_ptr, *src_msg_ptr;
bool dst_user, src_user;
@ -907,7 +910,7 @@ namespace ams::kern {
/* If the fast part of the copy didn't get everything, perform the slow part of the copy. */
if (fast_size < raw_size) {
R_TRY(src_page_table.CopyMemoryFromHeapToHeap(dst_page_table, dst_message_buffer + max_fast_size, raw_size - fast_size,
R_TRY(dst_page_table.CopyMemoryFromHeapToHeap(dst_page_table, dst_message_buffer + max_fast_size, raw_size - fast_size,
KMemoryState_FlagReferenceCounted, KMemoryState_FlagReferenceCounted,
dst_perm,
KMemoryAttribute_Uncached, KMemoryAttribute_None,
@ -921,7 +924,7 @@ namespace ams::kern {
constexpr KMemoryPermission DestinationPermission = static_cast<KMemoryPermission>(KMemoryPermission_NotMapped | KMemoryPermission_KernelReadWrite);
/* Copy the memory. */
R_TRY(src_page_table.CopyMemoryFromUserToLinear(dst_message_buffer + offset_words, raw_size,
R_TRY(dst_page_table.CopyMemoryFromUserToLinear(dst_message_buffer + offset_words, raw_size,
KMemoryState_FlagReferenceCounted, KMemoryState_FlagReferenceCounted,
DestinationPermission,
KMemoryAttribute_Uncached, KMemoryAttribute_None,