https://github.com/torvalds/linux
anon_inodefs filesystem is a kernel internal filesystem userspace shouldn't mess with. Remove registration of it so userspace cannot even try to mount it (which would fail anyway because the filesystem is MS_NOUSER). This fixes an oops triggered by trinity when it tried mounting anon_inodefs which overwrote anon_inode_inode pointer while other CPU has been in anon_inode_getfile() between ihold() and d_instantiate(). Thus effectively creating dentry pointing to an inode without holding a reference to it. Reported-by: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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fs: Avoid userspace mounting anon_inodefs filesystem
File | Mode | Size |
---|---|---|
Documentation | ||
arch | ||
block | ||
crypto | ||
drivers | ||
firmware | ||
fs | ||
include | ||
init | ||
ipc | ||
kernel | ||
lib | ||
mm | ||
net | ||
samples | ||
scripts | ||
security | ||
sound | ||
tools | ||
usr | ||
virt | ||
.gitignore | -rw-r--r-- | 1.1 KB |
.mailmap | -rw-r--r-- | 4.4 KB |
COPYING | -rw-r--r-- | 18.3 KB |
CREDITS | -rw-r--r-- | 93.3 KB |
Kbuild | -rw-r--r-- | 2.5 KB |
Kconfig | -rw-r--r-- | 252 bytes |
MAINTAINERS | -rw-r--r-- | 267.3 KB |
Makefile | -rw-r--r-- | 49.1 KB |
README | -rw-r--r-- | 18.3 KB |
REPORTING-BUGS | -rw-r--r-- | 7.3 KB |
Computing file changes ...