6.6-stable review patch. If anyone has any objections, please let me know.
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From: David Howells dhowells@redhat.com
[ Upstream commit 066baf92bed934c9fb4bcee97a193f47aa63431c ]
copy_mc_to_user() has the destination marked __user on powerpc, but not on x86; the latter results in a sparse warning in lib/iov_iter.c.
Fix this by applying the tag on x86 too.
Fixes: ec6347bb4339 ("x86, powerpc: Rename memcpy_mcsafe() to copy_mc_to_{user, kernel}()") Signed-off-by: David Howells dhowells@redhat.com Link: https://lore.kernel.org/r/20230925120309.1731676-3-dhowells@redhat.com cc: Dan Williams dan.j.williams@intel.com cc: Thomas Gleixner tglx@linutronix.de cc: Ingo Molnar mingo@redhat.com cc: Borislav Petkov bp@alien8.de cc: Dave Hansen dave.hansen@linux.intel.com cc: "H. Peter Anvin" hpa@zytor.com cc: Alexander Viro viro@zeniv.linux.org.uk cc: Jens Axboe axboe@kernel.dk cc: Christoph Hellwig hch@lst.de cc: Christian Brauner christian@brauner.io cc: Matthew Wilcox willy@infradead.org cc: Linus Torvalds torvalds@linux-foundation.org cc: David Laight David.Laight@ACULAB.COM cc: x86@kernel.org cc: linux-block@vger.kernel.org cc: linux-fsdevel@vger.kernel.org cc: linux-mm@kvack.org Signed-off-by: Christian Brauner brauner@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- arch/x86/include/asm/uaccess.h | 2 +- arch/x86/lib/copy_mc.c | 8 ++++---- 2 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/arch/x86/include/asm/uaccess.h b/arch/x86/include/asm/uaccess.h index 8bae40a662827..5c367c1290c35 100644 --- a/arch/x86/include/asm/uaccess.h +++ b/arch/x86/include/asm/uaccess.h @@ -496,7 +496,7 @@ copy_mc_to_kernel(void *to, const void *from, unsigned len); #define copy_mc_to_kernel copy_mc_to_kernel
unsigned long __must_check -copy_mc_to_user(void *to, const void *from, unsigned len); +copy_mc_to_user(void __user *to, const void *from, unsigned len); #endif
/* diff --git a/arch/x86/lib/copy_mc.c b/arch/x86/lib/copy_mc.c index 80efd45a77617..6e8b7e600def5 100644 --- a/arch/x86/lib/copy_mc.c +++ b/arch/x86/lib/copy_mc.c @@ -70,23 +70,23 @@ unsigned long __must_check copy_mc_to_kernel(void *dst, const void *src, unsigne } EXPORT_SYMBOL_GPL(copy_mc_to_kernel);
-unsigned long __must_check copy_mc_to_user(void *dst, const void *src, unsigned len) +unsigned long __must_check copy_mc_to_user(void __user *dst, const void *src, unsigned len) { unsigned long ret;
if (copy_mc_fragile_enabled) { __uaccess_begin(); - ret = copy_mc_fragile(dst, src, len); + ret = copy_mc_fragile((__force void *)dst, src, len); __uaccess_end(); return ret; }
if (static_cpu_has(X86_FEATURE_ERMS)) { __uaccess_begin(); - ret = copy_mc_enhanced_fast_string(dst, src, len); + ret = copy_mc_enhanced_fast_string((__force void *)dst, src, len); __uaccess_end(); return ret; }
- return copy_user_generic(dst, src, len); + return copy_user_generic((__force void *)dst, src, len); }