1. 12 Apr, 2016 1 commit
    • Yoshihiro Shimoda's avatar
      usb: renesas_usbhs: avoid NULL pointer derefernce in usbhsf_pkt_handler() · 012b586b
      Yoshihiro Shimoda authored
      commit 894f2fc4 upstream.
      
      When unexpected situation happened (e.g. tx/rx irq happened while
      DMAC is used), the usbhsf_pkt_handler() was possible to cause NULL
      pointer dereference like the followings:
      
      Unable to handle kernel NULL pointer dereference at virtual address 00000000
      pgd = c0004000
      [00000000] *pgd=00000000
      Internal error: Oops: 80000007 [#1] SMP ARM
      Modules linked in: usb_f_acm u_serial g_serial libcomposite
      CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.5.0-rc6-00842-gac57066-dirty #63
      Hardware name: Generic R8A7790 (Flattened Device Tree)
      task: c0729c00 ti: c0724000 task.ti: c0724000
      PC is at 0x0
      LR is at usbhsf_pkt_handler+0xac/0x118
      pc : [<00000000>]    lr : [<c03257e0>]    psr: 60000193
      sp : c0725db8  ip : 00000000  fp : c0725df4
      r10: 00000001  r9 : 00000193  r8 : ef3ccab4
      r7 : ef3cca10  r6 : eea4586c  r5 : 00000000  r4 : ef19ceb4
      r3 : 00000000  r2 : 0000009c  r1 : c0725dc4  r0 : ef19ceb4
      
      This patch adds a condition to avoid the dereference.
      
      Fixes: e73a9891 ("usb: renesas_usbhs: add DMAEngine support")
      Signed-off-by: default avatarYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
      Signed-off-by: default avatarFelipe Balbi <felipe.balbi@linux.intel.com>
      Signed-off-by: default avatarKamal Mostafa <kamal@canonical.com>
      012b586b
  2. 11 Apr, 2016 8 commits
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