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net: bnxt: fix a potential use-after-free in bnxt_init_tc

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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: 627c89d00f ("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>
This commit is contained in:
Dinghao Liu 2023-12-04 10:40:04 +08:00 • committed by Jakub Kicinski
parent a61f46e110
commit d007caaaf0
1 changed files with 1 additions and 0 deletions
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1
drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c
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@ -2075,6 +2075,7 @@ destroy_flow_table:
rhashtable_destroy(&tc_info->flow_table);
free_tc_info:
kfree(tc_info);
bp->tc_info = NULL;
return rc;
}