From 1ae7075bcd805c3aa5e8f53effc63a4562d6110e Mon Sep 17 00:00:00 2001 From: Chris Snook Date: Tue, 8 May 2007 00:24:15 -0700 Subject: 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 Acked-by: David Howells Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/read_write.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'fs/read_write.c') diff --git a/fs/read_write.c b/fs/read_write.c index 0642a1691d1..4d03008f015 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, -- cgit v1.2.3