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Pasha Tatashin
019fc36872
Restored vmalloc regions are currently not properly marked for KASAN,
causing KASAN to treat accesses to these regions as out-of-bounds.
Fix this by properly unpoisoning the restored vmalloc area using
kasan_unpoison_vmalloc(). This requires setting the VM_UNINITIALIZED flag
during the initial area allocation and clearing it after the pages have
been mapped and unpoisoned, using the clear_vm_uninitialized_flag()
helper.
Link: https://lkml.kernel.org/r/[email protected]
Fixes: a667300bd5 ("kho: add support for preserving vmalloc allocations")
Signed-off-by: Pasha Tatashin <[email protected]>
Reported-by: Pratyush Yadav <[email protected]>
Reviewed-by: Pratyush Yadav (Google) <[email protected]>
Tested-by: Pratyush Yadav (Google) <[email protected]>
Cc: Alexander Graf <[email protected]>
Cc: Liam Howlett <[email protected]>
Cc: Lorenzo Stoakes <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Mike Rapoport <[email protected]>
Cc: Suren Baghdasaryan <[email protected]>
Cc: "Uladzislau Rezki (Sony)" <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>