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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-29 10:36:49 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-29 10:36:49 -0700 |
| commit | 435f49a518c78eec8e2edbbadd912737246cbe20 (patch) | |
| tree | 106df2617d42ace231e2fa9fcf1e0fd1075874ea /include | |
| parent | f56f44001cb5b40089deac094dbb74e5c9f64d81 (diff) | |
| download | linux-3.10-435f49a518c78eec8e2edbbadd912737246cbe20.tar.gz linux-3.10-435f49a518c78eec8e2edbbadd912737246cbe20.tar.bz2 linux-3.10-435f49a518c78eec8e2edbbadd912737246cbe20.zip | |
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.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index 4d07902bc50..7b7b507ffa1 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 |