1. 08 Nov, 2019 12 commits
  2. 01 Nov, 2019 26 commits
  3. 25 Oct, 2019 2 commits
    • Mark Salter's avatar
      crypto: ccp - fix uninitialized list head · 691505a8
      Mark Salter authored
      A NULL-pointer dereference was reported in fedora bz#1762199 while
      reshaping a raid6 array after adding a fifth drive to an existing
      array.
      
      [   47.343549] md/raid:md0: raid level 6 active with 3 out of 5 devices, algorithm 2
      [   47.804017] md0: detected capacity change from 0 to 7885289422848
      [   47.822083] Unable to handle kernel read from unreadable memory at virtual address 0000000000000000
      ...
      [   47.940477] CPU: 1 PID: 14210 Comm: md0_raid6 Tainted: G        W         5.2.18-200.fc30.aarch64 #1
      [   47.949594] Hardware name: AMD Overdrive/Supercharger/To be filled by O.E.M., BIOS ROD1002C 04/08/2016
      [   47.958886] pstate: 00400085 (nzcv daIf +PAN -UAO)
      [   47.963668] pc : __list_del_entry_valid+0x2c/0xa8
      [   47.968366] lr : ccp_tx_submit+0x84/0x168 [ccp]
      [   47.972882] sp : ffff00001369b970
      [   47.976184] x29: ffff00001369b970 x28: ffff00001369bdb8
      [   47.981483] x27: 00000000ffffffff x26: ffff8003b758af70
      [   47.986782] x25: ffff8003b758b2d8 x24: ffff8003e6245818
      [   47.992080] x23: 0000000000000000 x22: ffff8003e62450c0
      [   47.997379] x21: ffff8003dfd6add8 x20: 0000000000000003
      [   48.002678] x19: ffff8003e6245100 x18: 0000000000000000
      [   48.007976] x17: 0000000000000000 x16: 0000000000000000
      [   48.013274] x15: 0000000000000000 x14: 0000000000000000
      [   48.018572] x13: ffff7e000ef83a00 x12: 0000000000000001
      [   48.023870] x11: ffff000010eff998 x10: 00000000000019a0
      [   48.029169] x9 : 0000000000000000 x8 : ffff8003e6245180
      [   48.034467] x7 : 0000000000000000 x6 : 000000000000003f
      [   48.039766] x5 : 0000000000000040 x4 : ffff8003e0145080
      [   48.045064] x3 : dead000000000200 x2 : 0000000000000000
      [   48.050362] x1 : 0000000000000000 x0 : ffff8003e62450c0
      [   48.055660] Call trace:
      [   48.058095]  __list_del_entry_valid+0x2c/0xa8
      [   48.062442]  ccp_tx_submit+0x84/0x168 [ccp]
      [   48.066615]  async_tx_submit+0x224/0x368 [async_tx]
      [   48.071480]  async_trigger_callback+0x68/0xfc [async_tx]
      [   48.076784]  ops_run_biofill+0x178/0x1e8 [raid456]
      [   48.081566]  raid_run_ops+0x248/0x818 [raid456]
      [   48.086086]  handle_stripe+0x864/0x1208 [raid456]
      [   48.090781]  handle_active_stripes.isra.0+0xb0/0x278 [raid456]
      [   48.096604]  raid5d+0x378/0x618 [raid456]
      [   48.100602]  md_thread+0xa0/0x150
      [   48.103905]  kthread+0x104/0x130
      [   48.107122]  ret_from_fork+0x10/0x18
      [   48.110686] Code: d2804003 f2fbd5a3 eb03003f 54000320 (f9400021)
      [   48.116766] ---[ end trace 23f390a527f7ad77 ]---
      
      ccp_tx_submit is passed a dma_async_tx_descriptor which is contained in
      a ccp_dma_desc and adds it to a ccp channel's pending list:
      
      	list_del(&desc->entry);
      	list_add_tail(&desc->entry, &chan->pending);
      
      The problem is that desc->entry may be uninitialized in the
      async_trigger_callback path where the descriptor was gotten
      from ccp_prep_dma_interrupt which got it from ccp_alloc_dma_desc
      which doesn't initialize the desc->entry list head. So, just
      initialize the list head to avoid the problem.
      
      Cc: <stable@vger.kernel.org>
      Reported-by: default avatarSahaj Sarup <sahajsarup@gmail.com>
      Signed-off-by: default avatarMark Salter <msalter@redhat.com>
      Acked-by: default avatarGary R Hook <gary.hook@amd.com>
      Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
      691505a8
    • Geert Uytterhoeven's avatar
      crypto: nx - Improve debugfs_create_u{32,64}() handling for atomics · fe95938d
      Geert Uytterhoeven authored
      Variables of type atomic{,64}_t can be used fine with
      debugfs_create_u{32,64}, when passing a pointer to the embedded counter.
      This allows to get rid of the casts, which prevented compiler checks.
      Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
      Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
      fe95938d