On Thu, Nov 6, 2014 at 6:25 PM, Jeff Moyer <jmoyer@xxxxxxxxxx> wrote: > Milosz Tanski <milosz@xxxxxxxxx> writes: > >> New syscalls that take an flag argument. This change does not add any specific >> flags. >> >> Signed-off-by: Milosz Tanski <milosz@xxxxxxxxx> >> Reviewed-by: Christoph Hellwig <hch@xxxxxx> >> --- >> fs/read_write.c | 176 ++++++++++++++++++++++++++++++-------- >> include/linux/compat.h | 6 ++ >> include/linux/syscalls.h | 6 ++ >> include/uapi/asm-generic/unistd.h | 6 +- >> mm/filemap.c | 5 +- >> 5 files changed, 158 insertions(+), 41 deletions(-) >> >> diff --git a/fs/read_write.c b/fs/read_write.c >> index 94b2d34..907735c 100644 >> --- a/fs/read_write.c >> +++ b/fs/read_write.c >> @@ -866,6 +866,8 @@ ssize_t vfs_readv(struct file *file, const struct iovec __user *vec, >> return -EBADF; >> if (!(file->f_mode & FMODE_CAN_READ)) >> return -EINVAL; >> + if (flags & ~0) >> + return -EINVAL; >> >> return do_readv_writev(READ, file, vec, vlen, pos, flags); >> } >> @@ -879,21 +881,23 @@ ssize_t vfs_writev(struct file *file, const struct iovec __user *vec, >> return -EBADF; >> if (!(file->f_mode & FMODE_CAN_WRITE)) >> return -EINVAL; >> + if (flags & ~0) >> + return -EINVAL; >> >> return do_readv_writev(WRITE, file, vec, vlen, pos, flags); >> } > > Hi, Milosz, > > You've checked for invalid flags for the normal system calls, but not > for the compat variants. Can you add that in, please? > > Thanks! > Jeff That's a good catch Jeff I'll fix this and it'll be in the next version of the patch series. - M -- Milosz Tanski CTO 16 East 34th Street, 15th floor New York, NY 10016 p: 646-253-9055 e: milosz@xxxxxxxxx -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>