android_kernel_xiaomi_sm8350/fs/proc
KOSAKI Motohiro bd6daba909 procfs: make errno values consistent when open pident vs exit(2) race occurs
proc_pident_instantiate() has following call flow.

proc_pident_lookup()
  proc_pident_instantiate()
    proc_pid_make_inode()

And, proc_pident_lookup() has following error handling.

	const struct pid_entry *p, *last;
	error = ERR_PTR(-ENOENT);
	if (!task)
		goto out_no_task;

Then, proc_pident_instantiate should return ENOENT too when racing against
exit(2) occur.

EINAL has two bad reason.
  - it implies caller is wrong. bad the race isn't caller's mistake.
  - man 2 open don't explain EINVAL. user often don't handle it.

Note: Other proc_pid_make_inode() caller already use ENOENT properly.

Acked-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-05-29 08:40:02 -07:00
..
array.c proc: avoid information leaks to non-privileged processes 2009-05-04 15:14:23 -07:00
base.c procfs: make errno values consistent when open pident vs exit(2) race occurs 2009-05-29 08:40:02 -07:00
cmdline.c
cpuinfo.c
devices.c
generic.c proc 1/2: do PDE usecounting even for ->read_proc, ->write_proc 2009-03-31 01:14:27 +04:00
inode.c proc 2/2: remove struct proc_dir_entry::owner 2009-03-31 01:14:44 +04:00
internal.h proc 1/2: do PDE usecounting even for ->read_proc, ->write_proc 2009-03-31 01:14:27 +04:00
interrupts.c
Kconfig
kcore.c
kmsg.c
loadavg.c
Makefile
meminfo.c mm: fix Committed_AS underflow on large NR_CPUS environment 2009-05-02 15:36:10 -07:00
mmu.c
nommu.c trivial: fix typo "kernal" -> "kernel" 2009-03-30 15:21:57 +02:00
page.c
proc_devtree.c
proc_net.c
proc_sysctl.c
proc_tty.c proc tty: remove struct tty_operations::read_proc 2009-04-01 08:59:10 -07:00
root.c Convert obvious places to deactivate_locked_super() 2009-05-09 10:49:40 -04:00
stat.c [S390] /proc/stat idle field for idle cpus 2009-04-23 13:58:17 +02:00
task_mmu.c pagemap: require aligned-length, non-null reads of /proc/pid/pagemap 2009-05-02 15:36:09 -07:00
task_nommu.c nommu: fix typo vma->pg_off to vma->vm_pgoff 2009-04-08 10:21:44 -07:00
uptime.c Revert "proc: revert /proc/uptime to ->read_proc hook" 2009-03-31 01:14:58 +04:00
version.c
vmcore.c