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authorMichael Bestas <mkbestas@lineageos.org>2020-09-19 12:58:54 +0300
committerMichael Bestas <mkbestas@lineageos.org>2020-09-19 12:58:54 +0300
commit3b601dd398b0f8a66744c0ecf384a6cbe65e36e7 (patch)
tree570d5895dfced5d2e443a7f9b8f6fa5f9a7560f3 /include/linux/uaccess.h
parenta638073161e90ac6dc0ffc2e27cbc4bcd3ff88c3 (diff)
parent5fd2d19eeb9767339e1338eb6789495d1812065b (diff)
Merge branch 'android-4.4-p' of https://android.googlesource.com/kernel/common into lineage-17.1-caf-msm8998
This brings LA.UM.8.4.r1-05900-8x98.0 up to date with https://android.googlesource.com/kernel/common/ android-4.4-p at commit: 5fd2d19eeb976 Merge 4.4.236 into android-4.4-p Conflicts: drivers/scsi/ufs/ufshcd.c Change-Id: I22282a0d571bdb72f50d3fc1e2cee4443de1f7f4
Diffstat (limited to 'include/linux/uaccess.h')
-rw-r--r--include/linux/uaccess.h26
1 files changed, 26 insertions, 0 deletions
diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h
index 9442423979c1..cc5ba47062e8 100644
--- a/include/linux/uaccess.h
+++ b/include/linux/uaccess.h
@@ -91,6 +91,17 @@ extern long probe_kernel_read(void *dst, const void *src, size_t size);
extern long __probe_kernel_read(void *dst, const void *src, size_t size);
/*
+ * probe_user_read(): safely attempt to read from a location in user space
+ * @dst: pointer to the buffer that shall take the data
+ * @src: address to read from
+ * @size: size of the data chunk
+ *
+ * Safely read from address @src to the buffer at @dst. If a kernel fault
+ * happens, handle that and return -EFAULT.
+ */
+extern long probe_user_read(void *dst, const void __user *src, size_t size);
+
+/*
* probe_kernel_write(): safely attempt to write to a location
* @dst: address to write to
* @src: pointer to the data that shall be written
@@ -102,7 +113,22 @@ extern long __probe_kernel_read(void *dst, const void *src, size_t size);
extern long notrace probe_kernel_write(void *dst, const void *src, size_t size);
extern long notrace __probe_kernel_write(void *dst, const void *src, size_t size);
+/*
+ * probe_user_write(): safely attempt to write to a location in user space
+ * @dst: address to write to
+ * @src: pointer to the data that shall be written
+ * @size: size of the data chunk
+ *
+ * Safely write to address @dst from the buffer at @src. If a kernel fault
+ * happens, handle that and return -EFAULT.
+ */
+extern long notrace probe_user_write(void __user *dst, const void *src, size_t size);
+extern long notrace __probe_user_write(void __user *dst, const void *src, size_t size);
+
extern long strncpy_from_unsafe(char *dst, const void *unsafe_addr, long count);
+extern long strncpy_from_unsafe_user(char *dst, const void __user *unsafe_addr,
+ long count);
+extern long strnlen_unsafe_user(const void __user *unsafe_addr, long count);
/**
* probe_kernel_address(): safely attempt to read from a location