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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2014-01-29 14:05:46 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-02-13 13:55:31 -0800 |
| commit | d45f86dcde85841aea852a0200bd9761ccce107e (patch) | |
| tree | a4a43fd1656bcda3e69928c2c98e5eb1c78320e4 /fs | |
| parent | b6ee217853df0ccfdb0eb4c29f10f642bd342fef (diff) | |
| download | lwn-d45f86dcde85841aea852a0200bd9761ccce107e.tar.gz lwn-d45f86dcde85841aea852a0200bd9761ccce107e.zip | |
fs/compat: fix lookup_dcookie() parameter handling
commit d8d14bd09cddbaf0168d61af638455a26bd027ff upstream.
Commit d5dc77bfeeab ("consolidate compat lookup_dcookie()") coverted all
architectures to the new compat_sys_lookup_dcookie() syscall.
The "len" paramater of the new compat syscall must have the type
compat_size_t in order to enforce zero extension for architectures where
the ABI requires that the caller of a function performed zero and/or
sign extension to 64 bit of all parameters.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/dcookies.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/dcookies.c b/fs/dcookies.c index ab5954b50267..ac44a69fbea9 100644 --- a/fs/dcookies.c +++ b/fs/dcookies.c @@ -204,7 +204,7 @@ out: } #ifdef CONFIG_COMPAT -COMPAT_SYSCALL_DEFINE4(lookup_dcookie, u32, w0, u32, w1, char __user *, buf, size_t, len) +COMPAT_SYSCALL_DEFINE4(lookup_dcookie, u32, w0, u32, w1, char __user *, buf, compat_size_t, len) { #ifdef __BIG_ENDIAN return sys_lookup_dcookie(((u64)w0 << 32) | w1, buf, len); |