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riscv: uaccess: fix type of 0 variable on error in get_user()

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commit b9b916aee6715cd7f3318af6dc360c4729417b94 upstream.

If the get_user(x, ptr) has x as a pointer, then the setting
of (x) = 0 is going to produce the following sparse warning,
so fix this by forcing the type of 'x' when access_ok() fails.

fs/aio.c:2073:21: warning: Using plain integer as NULL pointer

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Reviewed-by: Palmer Dabbelt <palmer@rivosinc.com>
Link: https://lore.kernel.org/r/20221229170545.718264-1-ben-linux@fluff.org
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ben Dooks 2022-12-29 17:05:45 +00:00 • committed by Greg Kroah-Hartman
commit 1464feb5b6
1 changed files with 1 additions and 1 deletions
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2
arch/riscv/include/asm/uaccess.h
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@ -235,7 +235,7 @@ do { \
might_fault(); \
access_ok(__p, sizeof(*__p)) ? \
__get_user((x), __p) : \
((x) = 0, -EFAULT); \
((x) = (__force __typeof__(x))0, -EFAULT); \
})
#define __put_user_asm(insn, x, ptr, err) \