From: Jacob Keller <jacob.e.keller@intel.com>
Date: Sat, 16 May 2020 00:42:24 +0000 (-0700)
Subject: ice: fix potential double free in probe unrolling
X-Git-Tag: for-linux~48^2~44^2~12
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=bc3a024101ca497bea4c69be4054c32a5c349f1d;p=users%2Fdwmw2%2Flinux.git

ice: fix potential double free in probe unrolling

If ice_init_interrupt_scheme fails, ice_probe will jump to clearing up
the interrupts. This can lead to some static analysis tools such as the
compiler sanitizers complaining about double free problems.

Since ice_init_interrupt_scheme already unrolls internally on failure,
there is no need to call ice_clear_interrupt_scheme when it fails. Add
a new unroll label and use that instead.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---

diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index 6583acf32575e..5cffaf360cb04 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -3418,7 +3418,7 @@ ice_probe(struct pci_dev *pdev, const struct pci_device_id __always_unused *ent)
 	if (err) {
 		dev_err(dev, "ice_init_interrupt_scheme failed: %d\n", err);
 		err = -EIO;
-		goto err_init_interrupt_unroll;
+		goto err_init_vsi_unroll;
 	}
 
 	/* In case of MSIX we are going to setup the misc vector right here
@@ -3511,6 +3511,7 @@ err_msix_misc_unroll:
 	ice_free_irq_msix_misc(pf);
 err_init_interrupt_unroll:
 	ice_clear_interrupt_scheme(pf);
+err_init_vsi_unroll:
 	devm_kfree(dev, pf->vsi);
 err_init_pf_unroll:
 	ice_deinit_pf(pf);