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| author | Linus Torvalds <torvalds@g5.osdl.org> | 2006-07-14 16:51:34 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-07-14 16:51:34 -0700 |
| commit | 18b0bbd8ca6d3cb90425aa0d77b99a762c6d6de3 (patch) | |
| tree | b1a9c89bc546a71924ed7253f2f27afdeb82d297 /fs/proc | |
| parent | ab6cf0d0cb96417ef65cc2c2120c0e879edf7a4a (diff) | |
| download | lwn-18b0bbd8ca6d3cb90425aa0d77b99a762c6d6de3.tar.gz lwn-18b0bbd8ca6d3cb90425aa0d77b99a762c6d6de3.zip | |
Fix nasty /proc vulnerability
We have a bad interaction with both the kernel and user space being able
to change some of the /proc file status. This fixes the most obvious
part of it, but I expect we'll also make it harder for users to modify
even their "own" files in /proc.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/proc')
| -rw-r--r-- | fs/proc/base.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c index 243a94af0427..0cb8f20d000c 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -1338,6 +1338,7 @@ static int pid_revalidate(struct dentry *dentry, struct nameidata *nd) } else { inode->i_uid = 0; inode->i_gid = 0; + inode->i_mode = 0; } security_task_to_inode(task, inode); put_task_struct(task); |