ixgbe: fix too early devlink_free() in ixgbe_remove()

[ Upstream commit 5feef67 ]

Since ixgbe_adapter is embedded in devlink, calling devlink_free()
prematurely in the ixgbe_remove() path can lead to UAF. Move devlink_free()
to the end.

KASAN report:

 BUG: KASAN: use-after-free in ixgbe_reset_interrupt_capability+0x140/0x180 [ixgbe]
 Read of size 8 at addr ffff0000adf813e0 by task bash/2095
 CPU: 1 UID: 0 PID: 2095 Comm: bash Tainted: G S  6.17.0-rc2-tnguy.net-queue+ #1 PREEMPT(full)
 [...]
 Call trace:
  show_stack+0x30/0x90 (C)
  dump_stack_lvl+0x9c/0xd0
  print_address_description.constprop.0+0x90/0x310
  print_report+0x104/0x1f0
  kasan_report+0x88/0x180
  __asan_report_load8_noabort+0x20/0x30
  ixgbe_reset_interrupt_capability+0x140/0x180 [ixgbe]
  ixgbe_clear_interrupt_scheme+0xf8/0x130 [ixgbe]
  ixgbe_remove+0x2d0/0x8c0 [ixgbe]
  pci_device_remove+0xa0/0x220
  device_remove+0xb8/0x170
  device_release_driver_internal+0x318/0x490
  device_driver_detach+0x40/0x68
  unbind_store+0xec/0x118
  drv_attr_store+0x64/0xb8
  sysfs_kf_write+0xcc/0x138
  kernfs_fop_write_iter+0x294/0x440
  new_sync_write+0x1fc/0x588
  vfs_write+0x480/0x6a0
  ksys_write+0xf0/0x1e0
  __arm64_sys_write+0x70/0xc0
  invoke_syscall.constprop.0+0xcc/0x280
  el0_svc_common.constprop.0+0xa8/0x248
  do_el0_svc+0x44/0x68
  el0_svc+0x54/0x160
  el0t_64_sync_handler+0xa0/0xe8
  el0t_64_sync+0x1b0/0x1b8

Fixes: a028523 ("ixgbe: add initial devlink support")
Signed-off-by: Koichiro Den <[email protected]>
Tested-by: Rinitha S <[email protected]>
Reviewed-by: Jedrzej Jagielski <[email protected]>
Reviewed-by: Aleksandr Loktionov <[email protected]>
Reviewed-by: Paul Menzel <[email protected]>
Signed-off-by: Jacob Keller <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>

Author: Koichiro Den

drivers/net/ethernet/intel/ixgbe/ixgbe_main.c

@@ -12091,7 +12091,6 @@ static void ixgbe_remove(struct pci_dev *pdev)
 
 	devl_port_unregister(&adapter->devlink_port);
 	devl_unlock(adapter->devlink);
-	devlink_free(adapter->devlink);
 
 	ixgbe_stop_ipsec_offload(adapter);
 	ixgbe_clear_interrupt_scheme(adapter);
@@ -12127,6 +12126,8 @@ static void ixgbe_remove(struct pci_dev *pdev)
 
 	if (disable_dev)
 		pci_disable_device(pdev);
+
+	devlink_free(adapter->devlink);
 }
 
 /**