From: Alexey Gladkov Date: Thu, 23 Apr 2020 20:03:10 +0000 (+0200) Subject: Use proc_pid_ns() to get pid_namespace from the proc superblock X-Git-Tag: v5.10.7~2328^2~9 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c59f415a7cb6e1e1e1cdbd6ee370b050e95f6b21;p=platform%2Fkernel%2Flinux-rpi.git Use proc_pid_ns() to get pid_namespace from the proc superblock To get pid_namespace from the procfs superblock should be used a special helper. This will avoid errors when s_fs_info will change the type. Link: https://lore.kernel.org/lkml/20200423200316.164518-3-gladkov.alexey@gmail.com/ Link: https://lore.kernel.org/lkml/20200423112858.95820-1-gladkov.alexey@gmail.com/ Link: https://lore.kernel.org/lkml/06B50A1C-406F-4057-BFA8-3A7729EA7469@lca.pw/ Signed-off-by: Alexey Gladkov Signed-off-by: Eric W. Biederman --- diff --git a/fs/locks.c b/fs/locks.c index b8a31c1..399c5db 100644 --- a/fs/locks.c +++ b/fs/locks.c @@ -2823,7 +2823,7 @@ static void lock_get_status(struct seq_file *f, struct file_lock *fl, { struct inode *inode = NULL; unsigned int fl_pid; - struct pid_namespace *proc_pidns = file_inode(f->file)->i_sb->s_fs_info; + struct pid_namespace *proc_pidns = proc_pid_ns(file_inode(f->file)); fl_pid = locks_translate_pid(fl, proc_pidns); /* @@ -2901,7 +2901,7 @@ static int locks_show(struct seq_file *f, void *v) { struct locks_iterator *iter = f->private; struct file_lock *fl, *bfl; - struct pid_namespace *proc_pidns = file_inode(f->file)->i_sb->s_fs_info; + struct pid_namespace *proc_pidns = proc_pid_ns(file_inode(f->file)); fl = hlist_entry(v, struct file_lock, fl_link); diff --git a/security/tomoyo/realpath.c b/security/tomoyo/realpath.c index bf38fc1..08b096e 100644 --- a/security/tomoyo/realpath.c +++ b/security/tomoyo/realpath.c @@ -7,6 +7,7 @@ #include "common.h" #include +#include /** * tomoyo_encode2 - Encode binary string to ascii string. @@ -161,9 +162,10 @@ static char *tomoyo_get_local_path(struct dentry *dentry, char * const buffer, if (sb->s_magic == PROC_SUPER_MAGIC && *pos == '/') { char *ep; const pid_t pid = (pid_t) simple_strtoul(pos + 1, &ep, 10); + struct pid_namespace *proc_pidns = proc_pid_ns(d_inode(dentry)); if (*ep == '/' && pid && pid == - task_tgid_nr_ns(current, sb->s_fs_info)) { + task_tgid_nr_ns(current, proc_pidns)) { pos = ep - 5; if (pos < buffer) goto out;