1. 09 1月, 2018 1 次提交
  2. 14 12月, 2017 3 次提交
  3. 06 12月, 2017 1 次提交
  4. 12 10月, 2017 4 次提交
  5. 05 10月, 2017 1 次提交
  6. 24 9月, 2017 1 次提交
    • S
      net: qualcomm: rmnet: Fix rcu splat in rmnet_is_real_dev_registered · 5c346525
      Subash Abhinov Kasiviswanathan 提交于
      Xiaolong reported a suspicious rcu_dereference_check in the device
      unregister notifier callback. Since we do not dereference the
      rx_handler_data, it's ok to just check for the value of the pointer.
      Note that this section is already protected by rtnl_lock.
      
      [  101.364846] WARNING: suspicious RCU usage
      [  101.365654] 4.13.0-rc6-01701-gceed73a2 #1 Not tainted
      [  101.370873] -----------------------------
      [  101.372472] drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c:57 suspicious rcu_dereference_check() usage!
      [  101.374427]
      [  101.374427] other info that might help us debug this:
      [  101.374427]
      [  101.387491]
      [  101.387491] rcu_scheduler_active = 2, debug_locks = 1
      [  101.389368] 1 lock held by trinity-main/2809:
      [  101.390736]  #0:  (rtnl_mutex){+.+.+.}, at: [<8146085b>] rtnl_lock+0xf/0x11
      [  101.395482]
      [  101.395482] stack backtrace:
      [  101.396948] CPU: 0 PID: 2809 Comm: trinity-main Not tainted 4.13.0-rc6-01701-gceed73a2 #1
      [  101.398857] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
      [  101.401079] Call Trace:
      [  101.401656]  dump_stack+0xa1/0xeb
      [  101.402871]  lockdep_rcu_suspicious+0xc7/0xd0
      [  101.403665]  rmnet_is_real_dev_registered+0x40/0x4e
      [  101.405199]  rmnet_config_notify_cb+0x2c/0x142
      [  101.406344]  ? wireless_nlevent_flush+0x47/0x71
      [  101.407385]  notifier_call_chain+0x2d/0x47
      [  101.408645]  raw_notifier_call_chain+0xc/0xe
      [  101.409882]  call_netdevice_notifiers_info+0x41/0x49
      [  101.411402]  call_netdevice_notifiers+0xc/0xe
      [  101.412713]  rollback_registered_many+0x268/0x36e
      [  101.413702]  rollback_registered+0x39/0x56
      [  101.414965]  unregister_netdevice_queue+0x79/0x88
      [  101.415908]  unregister_netdev+0x16/0x1d
      
      Fixes: ceed73a2 ("drivers: net: ethernet: qualcomm: rmnet: Initial implementation")
      Signed-off-by: NSubash Abhinov Kasiviswanathan <subashab@codeaurora.org>
      Reported-by: Nkernel test robot <xiaolong.ye@intel.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      5c346525
  7. 04 9月, 2017 4 次提交
  8. 31 8月, 2017 1 次提交
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