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authorLinus Torvalds <torvalds@linux-foundation.org>2010-10-29 10:36:49 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-10-29 10:36:49 -0700
commit435f49a518c78eec8e2edbbadd912737246cbe20 (patch)
tree106df2617d42ace231e2fa9fcf1e0fd1075874ea /include
parentf56f44001cb5b40089deac094dbb74e5c9f64d81 (diff)
downloadlinux-435f49a518c78eec8e2edbbadd912737246cbe20.tar.bz2
readv/writev: do the same MAX_RW_COUNT truncation that read/write does
We used to protect against overflow, but rather than return an error, do what read/write does, namely to limit the total size to MAX_RW_COUNT. This is not only more consistent, but it also means that any broken low-level read/write routine that still keeps counts in 'int' can't break. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/fs.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 4d07902bc50c..7b7b507ffa1c 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1867,6 +1867,7 @@ extern int current_umask(void);
/* /sys/fs */
extern struct kobject *fs_kobj;
+#define MAX_RW_COUNT (INT_MAX & PAGE_CACHE_MASK)
extern int rw_verify_area(int, struct file *, loff_t *, size_t);
#define FLOCK_VERIFY_READ 1