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| author | Michael Bestas <mkbestas@lineageos.org> | 2021-07-10 21:26:34 +0300 |
|---|---|---|
| committer | Michael Bestas <mkbestas@lineageos.org> | 2021-07-10 21:26:34 +0300 |
| commit | 3c741a8b469c522434e6841d8618702303fd6a21 (patch) | |
| tree | f95f59bb8f761500862e72b98f9b266ecfdcc82e /fs/proc/base.c | |
| parent | d46db1f472cf55742a7a2db10218cdcc084e0daf (diff) | |
| parent | b5f0035416310da3ccfaf160e6d856c294ec3bf5 (diff) | |
Merge branch 'android-4.4-p' of https://android.googlesource.com/kernel/common into lineage-18.1-caf-msm8998
This brings LA.UM.9.2.r1-03400-SDMxx0.0 up to date with
https://android.googlesource.com/kernel/common/ android-4.4-p at commit:
b5f0035416310 Merge 4.4.274 into android-4.4-p
Conflicts:
include/linux/spi/spi.h
Change-Id: I3daac7891ee93c70ffe08b7e70b77e8b2989af67
Diffstat (limited to 'fs/proc/base.c')
| -rw-r--r-- | fs/proc/base.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c index ae5350d61b0a..075119d27fb1 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -2674,6 +2674,13 @@ out: } #ifdef CONFIG_SECURITY +static int proc_pid_attr_open(struct inode *inode, struct file *file) +{ + file->private_data = NULL; + __mem_open(inode, file, PTRACE_MODE_READ_FSCREDS); + return 0; +} + static ssize_t proc_pid_attr_read(struct file * file, char __user * buf, size_t count, loff_t *ppos) { @@ -2703,6 +2710,10 @@ static ssize_t proc_pid_attr_write(struct file * file, const char __user * buf, ssize_t length; struct task_struct *task = get_proc_task(inode); + /* A task may only write when it was the opener. */ + if (file->private_data != current->mm) + return -EPERM; + length = -ESRCH; if (!task) goto out_no_task; @@ -2741,9 +2752,11 @@ out_no_task: } static const struct file_operations proc_pid_attr_operations = { + .open = proc_pid_attr_open, .read = proc_pid_attr_read, .write = proc_pid_attr_write, .llseek = generic_file_llseek, + .release = mem_release, }; static const struct pid_entry attr_dir_stuff[] = { |