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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-04 11:08:32 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-04 11:08:32 -0700 |
| commit | f357a82048ff1e5645861475b014570e11ad1911 (patch) | |
| tree | a3ca0cf7b1638d3e8b0a1cb5815af43dd6e0c2c3 /arch/x86/include/asm | |
| parent | b20c99eb668f10b855a9fd87e0a2f5db3fb3637d (diff) | |
| parent | bd1c149aa9915b9abb6d83d0f01dfd2ace0680b5 (diff) | |
Merge branch 'x86-smap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 SMAP fixes from Ingo Molnar:
"Fixes for Intel SMAP support, to fix SIGSEGVs during bootup"
* 'x86-smap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
Introduce [compat_]save_altstack_ex() to unbreak x86 SMAP
x86, smap: Handle csum_partial_copy_*_user()
Diffstat (limited to 'arch/x86/include/asm')
| -rw-r--r-- | arch/x86/include/asm/checksum_32.h | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/arch/x86/include/asm/checksum_32.h b/arch/x86/include/asm/checksum_32.h index 46fc474fd81..f50de695173 100644 --- a/arch/x86/include/asm/checksum_32.h +++ b/arch/x86/include/asm/checksum_32.h @@ -49,9 +49,15 @@ static inline __wsum csum_partial_copy_from_user(const void __user *src, int len, __wsum sum, int *err_ptr) { + __wsum ret; + might_sleep(); - return csum_partial_copy_generic((__force void *)src, dst, - len, sum, err_ptr, NULL); + stac(); + ret = csum_partial_copy_generic((__force void *)src, dst, + len, sum, err_ptr, NULL); + clac(); + + return ret; } /* @@ -176,10 +182,16 @@ static inline __wsum csum_and_copy_to_user(const void *src, int len, __wsum sum, int *err_ptr) { + __wsum ret; + might_sleep(); - if (access_ok(VERIFY_WRITE, dst, len)) - return csum_partial_copy_generic(src, (__force void *)dst, - len, sum, NULL, err_ptr); + if (access_ok(VERIFY_WRITE, dst, len)) { + stac(); + ret = csum_partial_copy_generic(src, (__force void *)dst, + len, sum, NULL, err_ptr); + clac(); + return ret; + } if (len) *err_ptr = -EFAULT; |