Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=1ae7075bcd805c3aa5e8f53effc63a4562d6110e
Commit: 1ae7075bcd805c3aa5e8f53effc63a4562d6110e
Parent: 7b8e89249ba54fb6e12358bbed7e3070fa1d1e6a
Author: Chris Snook <[EMAIL PROTECTED]>
AuthorDate: Tue May 8 00:24:15 2007 -0700
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Tue May 8 11:14:59 2007 -0700
use use SEEK_MAX to validate user lseek arguments
Add SEEK_MAX and use it to validate lseek arguments from userspace.
Signed-off-by: Chris Snook <[EMAIL PROTECTED]>
Acked-by: David Howells <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
fs/read_write.c | 4 ++--
include/linux/fs.h | 1 +
2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/read_write.c b/fs/read_write.c
index 0642a16..4d03008 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -139,7 +139,7 @@ asmlinkage off_t sys_lseek(unsigned int fd, off_t offset,
unsigned int origin)
goto bad;
retval = -EINVAL;
- if (origin <= 2) {
+ if (origin <= SEEK_MAX) {
loff_t res = vfs_llseek(file, offset, origin);
retval = res;
if (res != (loff_t)retval)
@@ -166,7 +166,7 @@ asmlinkage long sys_llseek(unsigned int fd, unsigned long
offset_high,
goto bad;
retval = -EINVAL;
- if (origin > 2)
+ if (origin > SEEK_MAX)
goto out_putf;
offset = vfs_llseek(file, ((loff_t) offset_high << 32) | offset_low,
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 020a842..986b5d5 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -30,6 +30,7 @@
#define SEEK_SET 0 /* seek relative to beginning of file */
#define SEEK_CUR 1 /* seek relative to current file position */
#define SEEK_END 2 /* seek relative to end of file */
+#define SEEK_MAX SEEK_END
/* And dynamically-tunable limits and defaults: */
struct files_stat_struct {
-
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