5.15-stable review patch. If anyone has any objections, please let me know.
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From: Dinghao Liu dinghao.liu@zju.edu.cn
[ Upstream commit d007caaaf052f82ca2340d4c7b32d04a3f5dbf3f ]
When flow_indr_dev_register() fails, bnxt_init_tc will free bp->tc_info through kfree(). However, the caller function bnxt_init_one() will ignore this failure and call bnxt_shutdown_tc() on failure of bnxt_dl_register(), where a use-after-free happens. Fix this issue by setting bp->tc_info to NULL after kfree().
Fixes: 627c89d00fb9 ("bnxt_en: flow_offload: offload tunnel decap rules via indirect callbacks") Signed-off-by: Dinghao Liu dinghao.liu@zju.edu.cn Reviewed-by: Pavan Chebbi pavan.chebbi@broadcom.com Reviewed-by: Michael Chan michael.chan@broadcom.com Reviewed-by: Somnath Kotur somnath.kotur@broadcom.com Link: https://lore.kernel.org/r/20231204024004.8245-1-dinghao.liu@zju.edu.cn Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c index 1471b6130a2b9..b3473883eae6b 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c @@ -2075,6 +2075,7 @@ int bnxt_init_tc(struct bnxt *bp) rhashtable_destroy(&tc_info->flow_table); free_tc_info: kfree(tc_info); + bp->tc_info = NULL; return rc; }