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| author | Luka Perkov <luka@openwrt.org> | 2014-08-25 21:50:47 +0000 |
|---|---|---|
| committer | Luka Perkov <luka@openwrt.org> | 2014-08-25 21:50:47 +0000 |
| commit | 0fa1a7271adf0097c35bf097c5ee3f2db19fb6f5 (patch) | |
| tree | 04eee2f2e5aa1c6b16210f950fdbfd3bb17671b4 /target | |
| parent | 4597d3cd3b5f1b57952cd2b02e1919aaefb1b289 (diff) | |
| download | upstream-0fa1a7271adf0097c35bf097c5ee3f2db19fb6f5.tar.gz upstream-0fa1a7271adf0097c35bf097c5ee3f2db19fb6f5.tar.bz2 upstream-0fa1a7271adf0097c35bf097c5ee3f2db19fb6f5.zip | |
kernel: 3.14: backport for igb driver resolving a driver crash
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@42295 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target')
| -rw-r--r-- | target/linux/generic/patches-3.14/780-igb-Fix-Null-pointer-dereference-in-igb_reset_q_vect.patch | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.14/780-igb-Fix-Null-pointer-dereference-in-igb_reset_q_vect.patch b/target/linux/generic/patches-3.14/780-igb-Fix-Null-pointer-dereference-in-igb_reset_q_vect.patch new file mode 100644 index 0000000000..3beb9071e4 --- /dev/null +++ b/target/linux/generic/patches-3.14/780-igb-Fix-Null-pointer-dereference-in-igb_reset_q_vect.patch @@ -0,0 +1,40 @@ +From cb06d102327eadcd1bdc480bfd9f8876251d1007 Mon Sep 17 00:00:00 2001 +From: Christoph Paasch <christoph.paasch@uclouvain.be> +Date: Fri, 21 Mar 2014 03:48:19 -0700 +Subject: [PATCH] igb: Fix Null-pointer dereference in igb_reset_q_vector + +When igb_set_interrupt_capability() calls +igb_reset_interrupt_capability() (e.g., because CONFIG_PCI_MSI is unset), +num_q_vectors has been set but no vector has yet been allocated. + +igb_reset_interrupt_capability() will then call igb_reset_q_vector, +which assumes that the vector is allocated. As this is not the case, we +are accessing a NULL-pointer. + +This patch fixes it by checking that q_vector is indeed different from +NULL. + +Fixes: 02ef6e1d0b0023 (igb: Fix queue allocation method to accommodate changing during runtime) +Cc: Carolyn Wyborny <carolyn.wyborny@intel.com> +Signed-off-by: Christoph Paasch <christoph.paasch@uclouvain.be> +Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com> +Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> +--- + drivers/net/ethernet/intel/igb/igb_main.c | 6 ++++++ + 1 file changed, 6 insertions(+) + +--- a/drivers/net/ethernet/intel/igb/igb_main.c ++++ b/drivers/net/ethernet/intel/igb/igb_main.c +@@ -1020,6 +1020,12 @@ static void igb_reset_q_vector(struct ig + if (!q_vector) + return; + ++ /* Coming from igb_set_interrupt_capability, the vectors are not yet ++ * allocated. So, q_vector is NULL so we should stop here. ++ */ ++ if (!q_vector) ++ return; ++ + if (q_vector->tx.ring) + adapter->tx_ring[q_vector->tx.ring->queue_index] = NULL; + |