From: Chris Snook <[EMAIL PROTECTED]> Add SEEK_MAX and use it to validate lseek arguments from userspace.
Signed-off-by: Chris Snook <[EMAIL PROTECTED]> -- diff -urp b/fs/read_write.c c/fs/read_write.c --- b/fs/read_write.c 2007-02-20 16:48:39.000000000 -0500 +++ c/fs/read_write.c 2007-02-20 16:55:46.000000000 -0500 @@ -139,7 +139,7 @@ asmlinkage off_t sys_lseek(unsigned int 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 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 -urp b/include/linux/fs.h c/include/linux/fs.h --- b/include/linux/fs.h 2007-02-20 14:49:46.000000000 -0500 +++ c/include/linux/fs.h 2007-02-20 16:54:30.000000000 -0500 @@ -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 { - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/