riscv: Fix wrong usage of lm_alias() when splitting a huge linear mapping

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[ Upstream commit c29fc621e1 ]

lm_alias() can only be used on kernel mappings since it explicitly uses
__pa_symbol(), so simply fix this by checking where the address belongs
to before.

Fixes: 311cd2f6e2 ("riscv: Fix set_memory_XX() and set_direct_map_XX() by splitting huge linear mappings")
Reported-by: syzbot+afb726d49f84c8d95ee1@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/linux-riscv/000000000000620dd0060c02c5e1@google.com/
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Reviewed-by: Charlie Jenkins <charlie@rivosinc.com>
Link: https://lore.kernel.org/r/20231212195400.128457-1-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Alexandre Ghiti 2023-12-12 20:54:00 +01:00 • committed by Greg Kroah-Hartman

parent 1d7a030528

commit 82c34f2fe1

1 changed files with 7 additions and 2 deletions

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arch/riscv/mm/pageattr.c

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