This series simplifies the sysctl handler for pipe-max-size and fixes another set of bugs related to the pipe buffer limits: - The root user wasn't allowed to exceed the limits when creating new pipes. - There was an off-by-one error when checking the limits, so a limit of N was actually treated as N - 1. - F_SETPIPE_SZ accepted values over UINT_MAX. - Reading the pipe buffer limits could be racy. Eric Biggers (7): pipe, sysctl: drop 'min' parameter from pipe-max-size converter pipe, sysctl: remove pipe_proc_fn() pipe: actually allow root to exceed the pipe buffer limits pipe: fix off-by-one error when checking buffer limits pipe: reject F_SETPIPE_SZ with size over UINT_MAX pipe: simplify round_pipe_size() pipe: read buffer limits atomically fs/pipe.c | 58 ++++++++++++++++++++--------------------------- include/linux/pipe_fs_i.h | 5 ++-- include/linux/sysctl.h | 3 --- kernel/sysctl.c | 33 +++++---------------------- 4 files changed, 32 insertions(+), 67 deletions(-) -- 2.15.1
