The patch titled Subject: proc: convert the return type of proc_fd_access_allowed() to be boolean has been added to the -mm tree. Its filename is proc-convert-the-return-type-of-proc_fd_access_allowed-to-be-boolean.patch This patch should soon appear at https://ozlabs.org/~akpm/mmots/broken-out/proc-convert-the-return-type-of-proc_fd_access_allowed-to-be-boolean.patch and later at https://ozlabs.org/~akpm/mmotm/broken-out/proc-convert-the-return-type-of-proc_fd_access_allowed-to-be-boolean.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx> Subject: proc: convert the return type of proc_fd_access_allowed() to be boolean Convert return type of proc_fd_access_allowed() and the 'allowed' in it to be boolean since the return type of ptrace_may_access() is boolean. Link: https://lkml.kernel.org/r/20211219024404.29779-1-zhengqi.arch@xxxxxxxxxxxxx Signed-off-by: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx> Cc: Kees Cook <keescook@xxxxxxxxxxxx> Cc: Alexey Dobriyan <adobriyan@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- fs/proc/base.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/fs/proc/base.c~proc-convert-the-return-type-of-proc_fd_access_allowed-to-be-boolean +++ a/fs/proc/base.c @@ -670,10 +670,10 @@ static int proc_pid_syscall(struct seq_f /************************************************************************/ /* permission checks */ -static int proc_fd_access_allowed(struct inode *inode) +static bool proc_fd_access_allowed(struct inode *inode) { struct task_struct *task; - int allowed = 0; + bool allowed = false; /* Allow access to a task's file descriptors if it is us or we * may use ptrace attach to the process and find out that * information. _ Patches currently in -mm which might be from zhengqi.arch@xxxxxxxxxxxxx are mm-remove-redundant-check-about-fault_flag_allow_retry-bit.patch mm-memcg-percpu-account-extra-objcg-space-to-memory-cgroups.patch proc-convert-the-return-type-of-proc_fd_access_allowed-to-be-boolean.patch