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ixgbe: avoid sleeping allocation in ixgbe_ipsec_vf_add_sa()

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Change kzalloc() flags used in ixgbe_ipsec_vf_add_sa() to GFP_ATOMIC, to
avoid sleeping in IRQ context.

Dan Carpenter, with the help of Smatch, has found following issue:
The patch eda0333ac2: "ixgbe: add VF IPsec management" from Aug 13,
2018 (linux-next), leads to the following Smatch static checker
warning: drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c:917 ixgbe_ipsec_vf_add_sa()
	warn: sleeping in IRQ context

The call tree that Smatch is worried about is:
ixgbe_msix_other() <- IRQ handler
-> ixgbe_msg_task()
   -> ixgbe_rcv_msg_from_vf()
      -> ixgbe_ipsec_vf_add_sa()

Fixes: eda0333ac2 ("ixgbe: add VF IPsec management")
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/intel-wired-lan/db31a0b0-4d9f-4e6b-aed8-88266eb5665c@moroto.mountain
Reviewed-by: Michal Kubiak <michal.kubiak@intel.com>
Signed-off-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Reviewed-by: Shannon Nelson <shannon.nelson@amd.com>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
This commit is contained in:
Przemek Kitszel 2024-03-05 17:02:02 +01:00 committed by Tony Nguyen
parent 1cb7fdb1df
commit aec806fb4a
1 changed files with 8 additions and 8 deletions
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16
drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c
View file

@ -914,7 +914,13 @@ int ixgbe_ipsec_vf_add_sa(struct ixgbe_adapter *adapter, u32 *msgbuf, u32 vf)
goto err_out;
}
xs = kzalloc(sizeof(*xs), GFP_KERNEL);
algo = xfrm_aead_get_byname(aes_gcm_name, IXGBE_IPSEC_AUTH_BITS, 1);
if (unlikely(!algo)) {
err = -ENOENT;
goto err_out;
}
xs = kzalloc(sizeof(*xs), GFP_ATOMIC);
if (unlikely(!xs)) {
err = -ENOMEM;
goto err_out;
@ -930,14 +936,8 @@ int ixgbe_ipsec_vf_add_sa(struct ixgbe_adapter *adapter, u32 *msgbuf, u32 vf)
memcpy(&xs->id.daddr.a4, sam->addr, sizeof(xs->id.daddr.a4));
xs->xso.dev = adapter->netdev;
algo = xfrm_aead_get_byname(aes_gcm_name, IXGBE_IPSEC_AUTH_BITS, 1);
if (unlikely(!algo)) {
err = -ENOENT;
goto err_xs;
}
aead_len = sizeof(*xs->aead) + IXGBE_IPSEC_KEY_BITS / 8;
xs->aead = kzalloc(aead_len, GFP_KERNEL);
xs->aead = kzalloc(aead_len, GFP_ATOMIC);
if (unlikely(!xs->aead)) {
err = -ENOMEM;
goto err_xs;