diff options
| author | Alexey Dobriyan <[email protected]> | 2019-02-01 22:20:01 +0000 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2019-02-01 23:46:22 +0000 |
| commit | 1fde6f21d90f8ba5da3cb9c54ca991ed72696c43 (patch) | |
| tree | 3873ead1c8fb221d7e93e0e68887d7502cafcd97 /fs/proc/generic.c | |
| parent | mm, memory_hotplug: don't bail out in do_migrate_range() prematurely (diff) | |
| download | kernel-1fde6f21d90f8ba5da3cb9c54ca991ed72696c43.tar.gz kernel-1fde6f21d90f8ba5da3cb9c54ca991ed72696c43.zip | |
proc: fix /proc/net/* after setns(2)
/proc entries under /proc/net/* can't be cached into dcache because
setns(2) can change current net namespace.
[[email protected]: coding-style fixes]
[[email protected]: avoid vim miscolorization]
[[email protected]: write test, add dummy ->d_revalidate hook: necessary if /proc/net/* is pinned at setns time]
Link: http://lkml.kernel.org/r/20190108192350.GA12034@avx2
Link: http://lkml.kernel.org/r/20190107162336.GA9239@avx2
Fixes: 1da4d377f943fe4194ffb9fb9c26cc58fad4dd24 ("proc: revalidate misc dentries")
Signed-off-by: Alexey Dobriyan <[email protected]>
Reported-by: Mateusz Stępień <[email protected]>
Reported-by: Ahmad Fatoum <[email protected]>
Cc: Al Viro <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'fs/proc/generic.c')
| -rw-r--r-- | fs/proc/generic.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/proc/generic.c b/fs/proc/generic.c index 8ae109429a88..e39bac94dead 100644 --- a/fs/proc/generic.c +++ b/fs/proc/generic.c @@ -256,7 +256,7 @@ struct dentry *proc_lookup_de(struct inode *dir, struct dentry *dentry, inode = proc_get_inode(dir->i_sb, de); if (!inode) return ERR_PTR(-ENOMEM); - d_set_d_op(dentry, &proc_misc_dentry_ops); + d_set_d_op(dentry, de->proc_dops); return d_splice_alias(inode, dentry); } read_unlock(&proc_subdir_lock); @@ -429,6 +429,8 @@ static struct proc_dir_entry *__proc_create(struct proc_dir_entry **parent, INIT_LIST_HEAD(&ent->pde_openers); proc_set_user(ent, (*parent)->uid, (*parent)->gid); + ent->proc_dops = &proc_misc_dentry_ops; + out: return ent; } |