diff mbox series

[net,v3,3/4] octeon_ep_vf: fix race conditions in ndo_get_stats64

Message ID 20241218115111.2407958-4-srasheed@marvell.com (mailing list archive)
State New
Delegated to: Netdev Maintainers
Headers show
Series Fix race conditions in ndo_get_stats64 | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag present in non-next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 9 of 9 maintainers
netdev/build_clang success Errors and warnings before: 1 this patch: 1
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 Fixes tag looks correct
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 7 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 6 this patch: 6
netdev/source_inline success Was 0 now: 0
netdev/contest fail net-next-2024-12-18--15-00 (tests: 650)

Commit Message

Shinas Rasheed Dec. 18, 2024, 11:51 a.m. UTC
ndo_get_stats64() can race with ndo_stop(), which frees input and
output queue resources. Call synchornize_net() in ndo_stop()
to avoid such races.

Fixes: c3fad23cdc06 ("octeon_ep_vf: add support for ndo ops")
Signed-off-by: Shinas Rasheed <srasheed@marvell.com>
---
V3:
  - No changes

V2: https://lore.kernel.org/all/20241216075842.2394606-4-srasheed@marvell.com/
  - Changed sync mechanism to fix race conditions from using an atomic
    set_bit ops to a much simpler synchronize_net()

V1: https://lore.kernel.org/all/20241203072130.2316913-4-srasheed@marvell.com/

 drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_main.c | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_main.c b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_main.c
index 7e6771c9cdbb..e6253f85b623 100644
--- a/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_main.c
+++ b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_main.c
@@ -523,6 +523,7 @@  static int octep_vf_stop(struct net_device *netdev)
 {
 	struct octep_vf_device *oct = netdev_priv(netdev);
 
+	synchronize_rcu();
 	netdev_info(netdev, "Stopping the device ...\n");
 
 	/* Stop Tx from stack */