This is a note to let you know that I've just added the patch titled
net: bnxt: fix a potential use-after-free in bnxt_init_tc
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-bnxt-fix-a-potential-use-after-free-in-bnxt_init.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit e7a4222b3dc5dcec86f2423d04da620194950a90
Author: Dinghao Liu <dinghao.liu@xxxxxxxxxx>
Date: Mon Dec 4 10:40:04 2023 +0800
net: bnxt: fix a potential use-after-free in bnxt_init_tc
[ 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@xxxxxxxxxx>
Reviewed-by: Pavan Chebbi <pavan.chebbi@xxxxxxxxxxxx>
Reviewed-by: Michael Chan <michael.chan@xxxxxxxxxxxx>
Reviewed-by: Somnath Kotur <somnath.kotur@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20231204024004.8245-1-dinghao.liu@xxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c
index 38d89d80b4a9c..273c9ba48f09a 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;
}
