| Message ID | 1682096818-30056-3-git-send-email-haiyangz@microsoft.com (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | df18f2da302f169e1a29098c6ca3b474f1b0269e |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | Update coding style and check alloc_frag | expand |
| Context | Check | Description |
|---|---|---|
| netdev/series_format | success | Posting correctly formatted |
| netdev/tree_selection | success | Clearly marked for net-next |
| netdev/fixes_present | success | Fixes tag not required for -next series |
| netdev/header_inline | success | No static functions without inline keyword in header files |
| netdev/build_32bit | success | Errors and warnings before: 8 this patch: 8 |
| netdev/cc_maintainers | success | CCed 13 of 13 maintainers |
| netdev/build_clang | success | Errors and warnings before: 8 this patch: 8 |
| netdev/verify_signedoff | success | Signed-off-by tag matches author and committer |
| netdev/deprecated_api | success | None detected |
| netdev/check_selftest | success | No net selftest shell script |
| netdev/verify_fixes | success | No Fixes tag |
| netdev/build_allmodconfig_warn | success | Errors and warnings before: 8 this patch: 8 |
| netdev/checkpatch | success | total: 0 errors, 0 warnings, 0 checks, 27 lines checked |
| netdev/kdoc | success | Errors and warnings before: 0 this patch: 0 |
| netdev/source_inline | success | Was 0 now: 0 |
diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/ethernet/microsoft/mana/mana_en.c index db2887e25714..06d6292e09b3 100644 --- a/drivers/net/ethernet/microsoft/mana/mana_en.c +++ b/drivers/net/ethernet/microsoft/mana/mana_en.c @@ -553,6 +553,14 @@ static int mana_pre_alloc_rxbufs(struct mana_port_context *mpc, int new_mtu) va = netdev_alloc_frag(mpc->rxbpre_alloc_size); if (!va) goto error; + + page = virt_to_head_page(va); + /* Check if the frag falls back to single page */ + if (compound_order(page) < + get_order(mpc->rxbpre_alloc_size)) { + put_page(page); + goto error; + } } else { page = dev_alloc_page(); if (!page) @@ -1504,6 +1512,13 @@ static void *mana_get_rxfrag(struct mana_rxq *rxq, struct device *dev, if (!va) return NULL; + + page = virt_to_head_page(va); + /* Check if the frag falls back to single page */ + if (compound_order(page) < get_order(rxq->alloc_size)) { + put_page(page); + return NULL; + } } else { page = dev_alloc_page(); if (!page)
netdev/napi_alloc_frag() may fall back to single page which is smaller than the requested size. Add error checking to avoid memory overwritten. Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> --- drivers/net/ethernet/microsoft/mana/mana_en.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)