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| author | Miklos Szeredi <mszeredi@suse.cz> | 2011-08-24 10:20:17 +0200 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@suse.cz> | 2011-08-24 10:20:17 +0200 |
| commit | c2183d1e9b3f313dd8ba2b1b0197c8d9fb86a7ae (patch) | |
| tree | fd9e12ce069012b60e5bdcd15627ccf4912d9ef1 /fs/fuse/dev.c | |
| parent | 478e0841b3dce3edc2c67bf0fc51af30f582e9e2 (diff) | |
| download | linux-c2183d1e9b3f313dd8ba2b1b0197c8d9fb86a7ae.tar.bz2 | |
fuse: check size of FUSE_NOTIFY_INVAL_ENTRY message
FUSE_NOTIFY_INVAL_ENTRY didn't check the length of the write so the
message processing could overrun and result in a "kernel BUG at
fs/fuse/dev.c:629!"
Reported-by: Han-Wen Nienhuys <hanwenn@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: stable@kernel.org
Diffstat (limited to 'fs/fuse/dev.c')
| -rw-r--r-- | fs/fuse/dev.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c index 640fc229df10..168a80f7f12b 100644 --- a/fs/fuse/dev.c +++ b/fs/fuse/dev.c @@ -1358,6 +1358,10 @@ static int fuse_notify_inval_entry(struct fuse_conn *fc, unsigned int size, if (outarg.namelen > FUSE_NAME_MAX) goto err; + err = -EINVAL; + if (size != sizeof(outarg) + outarg.namelen + 1) + goto err; + name.name = buf; name.len = outarg.namelen; err = fuse_copy_one(cs, buf, outarg.namelen + 1); |