Message ID | 20210107094900.173046-18-mkl@pengutronix.de (mailing list archive) |
---|---|
State | Accepted |
Delegated to: | Netdev Maintainers |
Headers | show |
Series | [net-next,01/19] can: tcan4x5x: replace DEVICE_NAME by KBUILD_MODNAME | expand |
Context | Check | Description |
---|---|---|
netdev/cover_letter | success | Pull request |
netdev/fixes_present | success | Link |
netdev/patch_count | warning | Series longer than 15 patches |
netdev/tree_selection | success | Clearly marked for net-next |
netdev/subject_prefix | success | Link |
netdev/cc_maintainers | success | CCed 6 of 6 maintainers |
netdev/source_inline | success | Was 0 now: 0 |
netdev/verify_signedoff | success | Link |
netdev/module_param | success | Was 0 now: 0 |
netdev/build_32bit | success | Errors and warnings before: 0 this patch: 0 |
netdev/kdoc | success | Errors and warnings before: 0 this patch: 0 |
netdev/verify_fixes | success | Link |
netdev/checkpatch | warning | WARNING: 'Tested-by:' is the preferred signature form |
netdev/build_allmodconfig_warn | success | Errors and warnings before: 0 this patch: 0 |
netdev/header_inline | success | Link |
netdev/stable | success | Stable not CCed |
diff --git a/net/can/raw.c b/net/can/raw.c index 6ec8aa1d0da4..37b47a39a3ed 100644 --- a/net/can/raw.c +++ b/net/can/raw.c @@ -665,10 +665,18 @@ static int raw_getsockopt(struct socket *sock, int level, int optname, if (ro->count > 0) { int fsize = ro->count * sizeof(struct can_filter); - if (len > fsize) - len = fsize; - if (copy_to_user(optval, ro->filter, len)) - err = -EFAULT; + /* user space buffer to small for filter list? */ + if (len < fsize) { + /* return -ERANGE and needed space in optlen */ + err = -ERANGE; + if (put_user(fsize, optlen)) + err = -EFAULT; + } else { + if (len > fsize) + len = fsize; + if (copy_to_user(optval, ro->filter, len)) + err = -EFAULT; + } } else { len = 0; }