1. 16 Mar, 2018 1 commit
    • Leon Romanovsky's avatar
      RDMA/ucma: Check AF family prior resolving address · 2975d5de
      Leon Romanovsky authored
      Garbage supplied by user will cause to UCMA module provide zero
      memory size for memcpy(), because it wasn't checked, it will
      produce unpredictable results in rdma_resolve_addr().
      
      [   42.873814] BUG: KASAN: null-ptr-deref in rdma_resolve_addr+0xc8/0xfb0
      [   42.874816] Write of size 28 at addr 00000000000000a0 by task resaddr/1044
      [   42.876765]
      [   42.876960] CPU: 1 PID: 1044 Comm: resaddr Not tainted 4.16.0-rc1-00057-gaa56a5293d7e #34
      [   42.877840] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.11.0-0-g63451fca13-prebuilt.qemu-project.org 04/01/2014
      [   42.879691] Call Trace:
      [   42.880236]  dump_stack+0x5c/0x77
      [   42.880664]  kasan_report+0x163/0x380
      [   42.881354]  ? rdma_resolve_addr+0xc8/0xfb0
      [   42.881864]  memcpy+0x34/0x50
      [   42.882692]  rdma_resolve_addr+0xc8/0xfb0
      [   42.883366]  ? deref_stack_reg+0x88/0xd0
      [   42.883856]  ? vsnprintf+0x31a/0x770
      [   42.884686]  ? rdma_bind_addr+0xc40/0xc40
      [   42.885327]  ? num_to_str+0x130/0x130
      [   42.885773]  ? deref_stack_reg+0x88/0xd0
      [   42.886217]  ? __read_once_size_nocheck.constprop.6+0x10/0x10
      [   42.887698]  ? unwind_get_return_address_ptr+0x50/0x50
      [   42.888302]  ? replace_slot+0x147/0x170
      [   42.889176]  ? delete_node+0x12c/0x340
      [   42.890223]  ? __radix_tree_lookup+0xa9/0x160
      [   42.891196]  ? ucma_resolve_ip+0xb7/0x110
      [   42.891917]  ucma_resolve_ip+0xb7/0x110
      [   42.893003]  ? ucma_resolve_addr+0x190/0x190
      [   42.893531]  ? _copy_from_user+0x5e/0x90
      [   42.894204]  ucma_write+0x174/0x1f0
      [   42.895162]  ? ucma_resolve_route+0xf0/0xf0
      [   42.896309]  ? dequeue_task_fair+0x67e/0xd90
      [   42.897192]  ? put_prev_entity+0x7d/0x170
      [   42.897870]  ? ring_buffer_record_is_on+0xd/0x20
      [   42.898439]  ? tracing_record_taskinfo_skip+0x20/0x50
      [   42.899686]  __vfs_write+0xc4/0x350
      [   42.900142]  ? kernel_read+0xa0/0xa0
      [   42.900602]  ? firmware_map_remove+0xdf/0xdf
      [   42.901135]  ? do_task_dead+0x5d/0x60
      [   42.901598]  ? do_exit+0xcc6/0x1220
      [   42.902789]  ? __fget+0xa8/0xf0
      [   42.903190]  vfs_write+0xf7/0x280
      [   42.903600]  SyS_write+0xa1/0x120
      [   42.904206]  ? SyS_read+0x120/0x120
      [   42.905710]  ? compat_start_thread+0x60/0x60
      [   42.906423]  ? SyS_read+0x120/0x120
      [   42.908716]  do_syscall_64+0xeb/0x250
      [   42.910760]  entry_SYSCALL_64_after_hwframe+0x21/0x86
      [   42.912735] RIP: 0033:0x7f138b0afe99
      [   42.914734] RSP: 002b:00007f138b799e98 EFLAGS: 00000287 ORIG_RAX: 0000000000000001
      [   42.917134] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f138b0afe99
      [   42.919487] RDX: 000000000000002e RSI: 0000000020000c40 RDI: 0000000000000004
      [   42.922393] RBP: 00007f138b799ec0 R08: 00007f138b79a700 R09: 0000000000000000
      [   42.925266] R10: 00007f138b79a700 R11: 0000000000000287 R12: 00007f138b799fc0
      [   42.927570] R13: 0000000000000000 R14: 00007ffdbae757c0 R15: 00007f138b79a9c0
      [   42.930047]
      [   42.932681] Disabling lock debugging due to kernel taint
      [   42.934795] BUG: unable to handle kernel NULL pointer dereference at 00000000000000a0
      [   42.936939] IP: memcpy_erms+0x6/0x10
      [   42.938864] PGD 80000001bea92067 P4D 80000001bea92067 PUD 1bea96067 PMD 0
      [   42.941576] Oops: 0002 [#1] SMP KASAN PTI
      [   42.943952] CPU: 1 PID: 1044 Comm: resaddr Tainted: G    B 4.16.0-rc1-00057-gaa56a5293d7e #34
      [   42.946964] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.11.0-0-g63451fca13-prebuilt.qemu-project.org 04/01/2014
      [   42.952336] RIP: 0010:memcpy_erms+0x6/0x10
      [   42.954707] RSP: 0018:ffff8801c8b479c8 EFLAGS: 00010286
      [   42.957227] RAX: 00000000000000a0 RBX: ffff8801c8b47ba0 RCX: 000000000000001c
      [   42.960543] RDX: 000000000000001c RSI: ffff8801c8b47bbc RDI: 00000000000000a0
      [   42.963867] RBP: ffff8801c8b47b60 R08: 0000000000000000 R09: ffffed0039168ed1
      [   42.967303] R10: 0000000000000001 R11: ffffed0039168ed0 R12: ffff8801c8b47bbc
      [   42.970685] R13: 00000000000000a0 R14: 1ffff10039168f4a R15: 0000000000000000
      [   42.973631] FS:  00007f138b79a700(0000) GS:ffff8801e5d00000(0000) knlGS:0000000000000000
      [   42.976831] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
      [   42.979239] CR2: 00000000000000a0 CR3: 00000001be908002 CR4: 00000000003606a0
      [   42.982060] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
      [   42.984877] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
      [   42.988033] Call Trace:
      [   42.990487]  rdma_resolve_addr+0xc8/0xfb0
      [   42.993202]  ? deref_stack_reg+0x88/0xd0
      [   42.996055]  ? vsnprintf+0x31a/0x770
      [   42.998707]  ? rdma_bind_addr+0xc40/0xc40
      [   43.000985]  ? num_to_str+0x130/0x130
      [   43.003410]  ? deref_stack_reg+0x88/0xd0
      [   43.006302]  ? __read_once_size_nocheck.constprop.6+0x10/0x10
      [   43.008780]  ? unwind_get_return_address_ptr+0x50/0x50
      [   43.011178]  ? replace_slot+0x147/0x170
      [   43.013517]  ? delete_node+0x12c/0x340
      [   43.016019]  ? __radix_tree_lookup+0xa9/0x160
      [   43.018755]  ? ucma_resolve_ip+0xb7/0x110
      [   43.021270]  ucma_resolve_ip+0xb7/0x110
      [   43.023968]  ? ucma_resolve_addr+0x190/0x190
      [   43.026312]  ? _copy_from_user+0x5e/0x90
      [   43.029384]  ucma_write+0x174/0x1f0
      [   43.031861]  ? ucma_resolve_route+0xf0/0xf0
      [   43.034782]  ? dequeue_task_fair+0x67e/0xd90
      [   43.037483]  ? put_prev_entity+0x7d/0x170
      [   43.040215]  ? ring_buffer_record_is_on+0xd/0x20
      [   43.042990]  ? tracing_record_taskinfo_skip+0x20/0x50
      [   43.045595]  __vfs_write+0xc4/0x350
      [   43.048624]  ? kernel_read+0xa0/0xa0
      [   43.051604]  ? firmware_map_remove+0xdf/0xdf
      [   43.055379]  ? do_task_dead+0x5d/0x60
      [   43.058000]  ? do_exit+0xcc6/0x1220
      [   43.060783]  ? __fget+0xa8/0xf0
      [   43.063133]  vfs_write+0xf7/0x280
      [   43.065677]  SyS_write+0xa1/0x120
      [   43.068647]  ? SyS_read+0x120/0x120
      [   43.071179]  ? compat_start_thread+0x60/0x60
      [   43.074025]  ? SyS_read+0x120/0x120
      [   43.076705]  do_syscall_64+0xeb/0x250
      [   43.079006]  entry_SYSCALL_64_after_hwframe+0x21/0x86
      [   43.081606] RIP: 0033:0x7f138b0afe99
      [   43.083679] RSP: 002b:00007f138b799e98 EFLAGS: 00000287 ORIG_RAX: 0000000000000001
      [   43.086802] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f138b0afe99
      [   43.089989] RDX: 000000000000002e RSI: 0000000020000c40 RDI: 0000000000000004
      [   43.092866] RBP: 00007f138b799ec0 R08: 00007f138b79a700 R09: 0000000000000000
      [   43.096233] R10: 00007f138b79a700 R11: 0000000000000287 R12: 00007f138b799fc0
      [   43.098913] R13: 0000000000000000 R14: 00007ffdbae757c0 R15: 00007f138b79a9c0
      [   43.101809] Code: 90 90 90 90 90 eb 1e 0f 1f 00 48 89 f8 48 89 d1 48
      c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48
      89 d1 <f3> a4 c3 0f 1f 80 00 00 00 00 48 89 f8 48 83 fa 20 72 7e 40 38
      [   43.107950] RIP: memcpy_erms+0x6/0x10 RSP: ffff8801c8b479c8
      
      Reported-by: <syzbot+1d8c43206853b369d00c@syzkaller.appspotmail.com>
      Fixes: 75216638
      
       ("RDMA/cma: Export rdma cm interface to userspace")
      Signed-off-by: default avatarLeon Romanovsky <leonro@mellanox.com>
      Reviewed-by: default avatarSean Hefty <sean.hefty@intel.com>
      Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
      2975d5de
  2. 14 Mar, 2018 7 commits
    • Arnd Bergmann's avatar
      infiniband: bnxt_re: use BIT_ULL() for 64-bit bit masks · bd8602ca
      Arnd Bergmann authored
      On 32-bit targets, we otherwise get a warning about an impossible constant
      integer expression:
      
      In file included from include/linux/kernel.h:11,
                       from include/linux/interrupt.h:6,
                       from drivers/infiniband/hw/bnxt_re/ib_verbs.c:39:
      drivers/infiniband/hw/bnxt_re/ib_verbs.c: In function 'bnxt_re_query_device':
      include/linux/bitops.h:7:24: error: left shift count >= width of type [-Werror=shift-count-overflow]
       #define BIT(nr)   (1UL << (nr))
                              ^~
      drivers/infiniband/hw/bnxt_re/bnxt_re.h:61:34: note: in expansion of macro 'BIT'
       #define BNXT_RE_MAX_MR_SIZE_HIGH BIT(39)
                                        ^~~
      drivers/infiniband/hw/bnxt_re/bnxt_re.h:62:30: note: in expansion of macro 'BNXT_RE_MAX_MR_SIZE_HIGH'
       #define BNXT_RE_MAX_MR_SIZE  BNXT_RE_MAX_MR_SIZE_HIGH
                                    ^~~~~~~~~~~~~~~~~~~~~~~~
      drivers/infiniband/hw/bnxt_re/ib_verbs.c:149:25: note: in expansion of macro 'BNXT_RE_MAX_MR_SIZE'
        ib_attr->max_mr_size = BNXT_RE_MAX_MR_SIZE;
                               ^~~~~~~~~~~~~~~~~~~
      
      Fixes: 872f3578
      
       ("RDMA/bnxt_re: Add support for MRs with Huge pages")
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
      bd8602ca
    • Arnd Bergmann's avatar
      infiniband: qplib_fp: fix pointer cast · 5388a508
      Arnd Bergmann authored
      Building for a 32-bit target results in a couple of warnings from casting
      between a 32-bit pointer and a 64-bit integer:
      
      drivers/infiniband/hw/bnxt_re/qplib_fp.c: In function 'bnxt_qplib_service_nq':
      drivers/infiniband/hw/bnxt_re/qplib_fp.c:333:23: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
          bnxt_qplib_arm_srq((struct bnxt_qplib_srq *)q_handle,
                             ^
      drivers/infiniband/hw/bnxt_re/qplib_fp.c:336:12: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
                  (struct bnxt_qplib_srq *)q_handle,
                  ^
      In file included from include/linux/byteorder/little_endian.h:5,
                       from arch/arm/include/uapi/asm/byteorder.h:22,
                       from include/asm-generic/bitops/le.h:6,
                       from arch/arm/include/asm/bitops.h:342,
                       from include/linux/bitops.h:38,
                       from include/linux/kernel.h:11,
                       from include/linux/interrupt.h:6,
                       from drivers/infiniband/hw/bnxt_re/qplib_fp.c:39:
      drivers/infiniband/hw/bnxt_re/qplib_fp.c: In function 'bnxt_qplib_create_srq':
      include/uapi/linux/byteorder/little_endian.h:31:43: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast]
       #define __cpu_to_le64(x) ((__force __le64)(__u64)(x))
                                                 ^
      include/linux/byteorder/generic.h:86:21: note: in expansion of macro '__cpu_to_le64'
       #define cpu_to_le64 __cpu_to_le64
                           ^~~~~~~~~~~~~
      drivers/infiniband/hw/bnxt_re/qplib_fp.c:569:19: note: in expansion of macro 'cpu_to_le64'
        req.srq_handle = cpu_to_le64(srq);
      
      Using a uintptr_t as an intermediate works on all architectures.
      
      Fixes: 37cb11ac
      
       ("RDMA/bnxt_re: Add SRQ support for Broadcom adapters")
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
      5388a508
    • Mark Bloch's avatar
      IB/mlx5: Fix cleanup order on unload · 42cea83f
      Mark Bloch authored
      On load we create private CQ/QP/PD in order to be used by UMR, we create
      those resources after we register ourself as an IB device, and we destroy
      them after we unregister as an IB device. This was changed by commit
      16c1975f ("IB/mlx5: Create profile infrastructure to add and remove
      stages") which moved the destruction before we unregistration. This
      allowed to trigger an invalid memory access when unloading mlx5_ib while
      there are open resources:
      
      BUG: unable to handle kernel paging request at 00000001002c012c
      ...
      Call Trace:
       mlx5_ib_post_send_wait+0x75/0x110 [mlx5_ib]
       __slab_free+0x9a/0x2d0
       delay_time_func+0x10/0x10 [mlx5_ib]
       unreg_umr.isra.15+0x4b/0x50 [mlx5_ib]
       mlx5_mr_cache_free+0x46/0x150 [mlx5_ib]
       clean_mr+0xc9/0x190 [mlx5_ib]
       dereg_mr+0xba/0xf0 [mlx5_ib]
       ib_dereg_mr+0x13/0x20 [ib_core]
       remove_commit_idr_uobject+0x16/0x70 [ib_uverbs]
       uverbs_cleanup_ucontext+0xe8/0x1a0 [ib_uverbs]
       ib_uverbs_cleanup_ucontext.isra.9+0x19/0x40 [ib_uverbs]
       ib_uverbs_remove_one+0x162/0x2e0 [ib_uverbs]
       ib_unregister_device+0xd4/0x190 [ib_core]
       __mlx5_ib_remove+0x2e/0x40 [mlx5_ib]
       mlx5_remove_device+0xf5/0x120 [mlx5_core]
       mlx5_unregister_interface+0x37/0x90 [mlx5_core]
       mlx5_ib_cleanup+0xc/0x225 [mlx5_ib]
       SyS_delete_module+0x153/0x230
       do_syscall_64+0x62/0x110
       entry_SYSCALL_64_after_hwframe+0x21/0x86
      ...
      
      We restore the original behavior by breaking the UMR stage into two parts,
      pre and post IB registration stages, this way we can restore the original
      functionality and maintain clean separation of logic between stages.
      
      Fixes: 16c1975f
      
       ("IB/mlx5: Create profile infrastructure to add and remove stages")
      Signed-off-by: default avatarMark Bloch <markb@mellanox.com>
      Signed-off-by: default avatarLeon Romanovsky <leonro@mellanox.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      42cea83f
    • Leon Romanovsky's avatar
      RDMA/ucma: Don't allow join attempts for unsupported AF family · 0c81ffc6
      Leon Romanovsky authored
      Users can provide garbage while calling to ucma_join_ip_multicast(),
      it will indirectly cause to rdma_addr_size() return 0, making the
      call to ucma_process_join(), which had the right checks, but it is
      better to check the input as early as possible.
      
      The following crash from syzkaller revealed it.
      
      kernel BUG at lib/string.c:1052!
      invalid opcode: 0000 [#1] SMP KASAN Dumping ftrace buffer:
         (ftrace buffer empty)
      Modules linked in:
      CPU: 0 PID: 4113 Comm: syz-executor0 Not tainted 4.16.0-rc5+ #261
      Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
      RIP: 0010:fortify_panic+0x13/0x20 lib/string.c:1051
      RSP: 0018:ffff8801ca81f8f0 EFLAGS: 00010286
      RAX: 0000000000000022 RBX: 1ffff10039503f23 RCX: 0000000000000000
      RDX: 0000000000000022 RSI: 1ffff10039503ed3 RDI: ffffed0039503f12
      RBP: ffff8801ca81f8f0 R08: 0000000000000000 R09: 0000000000000000
      R10: 0000000000000006 R11: 0000000000000000 R12: ffff8801ca81f998
      R13: ffff8801ca81f938 R14: ffff8801ca81fa58 R15: 000000000000fa00
      FS:  0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:000000000a12a900
      CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
      CR2: 0000000008138024 CR3: 00000001cbb58004 CR4: 00000000001606f0
      DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
      DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
      Call Trace:
       memcpy include/linux/string.h:344 [inline]
       ucma_join_ip_multicast+0x36b/0x3b0 drivers/infiniband/core/ucma.c:1421
       ucma_write+0x2d6/0x3d0 drivers/infiniband/core/ucma.c:1633
       __vfs_write+0xef/0x970 fs/read_write.c:480
       vfs_write+0x189/0x510 fs/read_write.c:544
       SYSC_write fs/read_write.c:589 [inline]
       SyS_write+0xef/0x220 fs/read_write.c:581
       do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline]
       do_fast_syscall_32+0x3ec/0xf9f arch/x86/entry/common.c:392
       entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
      RIP: 0023:0xf7f9ec99
      RSP: 002b:00000000ff8172cc EFLAGS: 00000282 ORIG_RAX: 0000000000000004
      RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000100
      RDX: 0000000000000063 RSI: 0000000000000000 RDI: 0000000000000000
      RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
      R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
      R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
      Code: 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b 48 89 df e8 42 2c e3 fb eb de
      55 48 89 fe 48 c7 c7 80 75 98 86 48 89 e5 e8 85 95 94 fb <0f> 0b 90 90 90 90
      90 90 90 90 90 90 90 55 48 89 e5 41 57 41 56
      RIP: fortify_panic+0x13/0x20 lib/string.c:1051 RSP: ffff8801ca81f8f0
      
      Fixes: 5bc2b7b3
      
       ("RDMA/ucma: Allow user space to specify AF_IB when joining multicast")
      Reported-by: <syzbot+2287ac532caa81900a4e@syzkaller.appspotmail.com>
      Signed-off-by: default avatarLeon Romanovsky <leonro@mellanox.com>
      Reviewed-by: default avatarSean Hefty <sean.hefty@intel.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      0c81ffc6
    • Leon Romanovsky's avatar
      RDMA/ucma: Fix access to non-initialized CM_ID object · 7688f2c3
      Leon Romanovsky authored
      The attempt to join multicast group without ensuring that CMA device
      exists will lead to the following crash reported by syzkaller.
      
      [   64.076794] BUG: KASAN: null-ptr-deref in rdma_join_multicast+0x26e/0x12c0
      [   64.076797] Read of size 8 at addr 00000000000000b0 by task join/691
      [   64.076797]
      [   64.076800] CPU: 1 PID: 691 Comm: join Not tainted 4.16.0-rc1-00219-gb97853b65b93 #23
      [   64.076802] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.11.0-0-g63451fca13-prebuilt.qemu-proj4
      [   64.076803] Call Trace:
      [   64.076809]  dump_stack+0x5c/0x77
      [   64.076817]  kasan_report+0x163/0x380
      [   64.085859]  ? rdma_join_multicast+0x26e/0x12c0
      [   64.086634]  rdma_join_multicast+0x26e/0x12c0
      [   64.087370]  ? rdma_disconnect+0xf0/0xf0
      [   64.088579]  ? __radix_tree_replace+0xc3/0x110
      [   64.089132]  ? node_tag_clear+0x81/0xb0
      [   64.089606]  ? idr_alloc_u32+0x12e/0x1a0
      [   64.090517]  ? __fprop_inc_percpu_max+0x150/0x150
      [   64.091768]  ? tracing_record_taskinfo+0x10/0xc0
      [   64.092340]  ? idr_alloc+0x76/0xc0
      [   64.092951]  ? idr_alloc_u32+0x1a0/0x1a0
      [   64.093632]  ? ucma_process_join+0x23d/0x460
      [   64.094510]  ucma_process_join+0x23d/0x460
      [   64.095199]  ? ucma_migrate_id+0x440/0x440
      [   64.095696]  ? futex_wake+0x10b/0x2a0
      [   64.096159]  ucma_join_multicast+0x88/0xe0
      [   64.096660]  ? ucma_process_join+0x460/0x460
      [   64.097540]  ? _copy_from_user+0x5e/0x90
      [   64.098017]  ucma_write+0x174/0x1f0
      [   64.098640]  ? ucma_resolve_route+0xf0/0xf0
      [   64.099343]  ? rb_erase_cached+0x6c7/0x7f0
      [   64.099839]  __vfs_write+0xc4/0x350
      [   64.100622]  ? perf_syscall_enter+0xe4/0x5f0
      [   64.101335]  ? kernel_read+0xa0/0xa0
      [   64.103525]  ? perf_sched_cb_inc+0xc0/0xc0
      [   64.105510]  ? syscall_exit_register+0x2a0/0x2a0
      [   64.107359]  ? __switch_to+0x351/0x640
      [   64.109285]  ? fsnotify+0x899/0x8f0
      [   64.111610]  ? fsnotify_unmount_inodes+0x170/0x170
      [   64.113876]  ? __fsnotify_update_child_dentry_flags+0x30/0x30
      [   64.115813]  ? ring_buffer_record_is_on+0xd/0x20
      [   64.117824]  ? __fget+0xa8/0xf0
      [   64.119869]  vfs_write+0xf7/0x280
      [   64.122001]  SyS_write+0xa1/0x120
      [   64.124213]  ? SyS_read+0x120/0x120
      [   64.126644]  ? SyS_read+0x120/0x120
      [   64.128563]  do_syscall_64+0xeb/0x250
      [   64.130732]  entry_SYSCALL_64_after_hwframe+0x21/0x86
      [   64.132984] RIP: 0033:0x7f5c994ade99
      [   64.135699] RSP: 002b:00007f5c99b97d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
      [   64.138740] RAX: ffffffffffffffda RBX: 00000000200001e4 RCX: 00007f5c994ade99
      [   64.141056] RDX: 00000000000000a0 RSI: 00000000200001c0 RDI: 0000000000000015
      [   64.143536] RBP: 00007f5c99b97ec0 R08: 0000000000000000 R09: 0000000000000000
      [   64.146017] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5c99b97fc0
      [   64.148608] R13: 0000000000000000 R14: 00007fff660e1c40 R15: 00007f5c99b989c0
      [   64.151060]
      [   64.153703] Disabling lock debugging due to kernel taint
      [   64.156032] BUG: unable to handle kernel NULL pointer dereference at 00000000000000b0
      [   64.159066] IP: rdma_join_multicast+0x26e/0x12c0
      [   64.161451] PGD 80000001d0298067 P4D 80000001d0298067 PUD 1dea39067 PMD 0
      [   64.164442] Oops: 0000 [#1] SMP KASAN PTI
      [   64.166817] CPU: 1 PID: 691 Comm: join Tainted: G    B 4.16.0-rc1-00219-gb97853b65b93 #23
      [   64.170004] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.11.0-0-g63451fca13-prebuilt.qemu-proj4
      [   64.174985] RIP: 0010:rdma_join_multicast+0x26e/0x12c0
      [   64.177246] RSP: 0018:ffff8801c8207860 EFLAGS: 00010282
      [   64.179901] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff94789522
      [   64.183344] RDX: 1ffffffff2d50fa5 RSI: 0000000000000297 RDI: 0000000000000297
      [   64.186237] RBP: ffff8801c8207a50 R08: 0000000000000000 R09: ffffed0039040ea7
      [   64.189328] R10: 0000000000000001 R11: ffffed0039040ea6 R12: 0000000000000000
      [   64.192634] R13: 0000000000000000 R14: ffff8801e2022800 R15: ffff8801d4ac2400
      [   64.196105] FS:  00007f5c99b98700(0000) GS:ffff8801e5d00000(0000) knlGS:0000000000000000
      [   64.199211] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
      [   64.202046] CR2: 00000000000000b0 CR3: 00000001d1c48004 CR4: 00000000003606a0
      [   64.205032] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
      [   64.208221] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
      [   64.211554] Call Trace:
      [   64.213464]  ? rdma_disconnect+0xf0/0xf0
      [   64.216124]  ? __radix_tree_replace+0xc3/0x110
      [   64.219337]  ? node_tag_clear+0x81/0xb0
      [   64.222140]  ? idr_alloc_u32+0x12e/0x1a0
      [   64.224422]  ? __fprop_inc_percpu_max+0x150/0x150
      [   64.226588]  ? tracing_record_taskinfo+0x10/0xc0
      [   64.229763]  ? idr_alloc+0x76/0xc0
      [   64.232186]  ? idr_alloc_u32+0x1a0/0x1a0
      [   64.234505]  ? ucma_process_join+0x23d/0x460
      [   64.237024]  ucma_process_join+0x23d/0x460
      [   64.240076]  ? ucma_migrate_id+0x440/0x440
      [   64.243284]  ? futex_wake+0x10b/0x2a0
      [   64.245302]  ucma_join_multicast+0x88/0xe0
      [   64.247783]  ? ucma_process_join+0x460/0x460
      [   64.250841]  ? _copy_from_user+0x5e/0x90
      [   64.253878]  ucma_write+0x174/0x1f0
      [   64.257008]  ? ucma_resolve_route+0xf0/0xf0
      [   64.259877]  ? rb_erase_cached+0x6c7/0x7f0
      [   64.262746]  __vfs_write+0xc4/0x350
      [   64.265537]  ? perf_syscall_enter+0xe4/0x5f0
      [   64.267792]  ? kernel_read+0xa0/0xa0
      [   64.270358]  ? perf_sched_cb_inc+0xc0/0xc0
      [   64.272575]  ? syscall_exit_register+0x2a0/0x2a0
      [   64.275367]  ? __switch_to+0x351/0x640
      [   64.277700]  ? fsnotify+0x899/0x8f0
      [   64.280530]  ? fsnotify_unmount_inodes+0x170/0x170
      [   64.283156]  ? __fsnotify_update_child_dentry_flags+0x30/0x30
      [   64.286182]  ? ring_buffer_record_is_on+0xd/0x20
      [   64.288749]  ? __fget+0xa8/0xf0
      [   64.291136]  vfs_write+0xf7/0x280
      [   64.292972]  SyS_write+0xa1/0x120
      [   64.294965]  ? SyS_read+0x120/0x120
      [   64.297474]  ? SyS_read+0x120/0x120
      [   64.299751]  do_syscall_64+0xeb/0x250
      [   64.301826]  entry_SYSCALL_64_after_hwframe+0x21/0x86
      [   64.304352] RIP: 0033:0x7f5c994ade99
      [   64.306711] RSP: 002b:00007f5c99b97d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
      [   64.309577] RAX: ffffffffffffffda RBX: 00000000200001e4 RCX: 00007f5c994ade99
      [   64.312334] RDX: 00000000000000a0 RSI: 00000000200001c0 RDI: 0000000000000015
      [   64.315783] RBP: 00007f5c99b97ec0 R08: 0000000000000000 R09: 0000000000000000
      [   64.318365] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5c99b97fc0
      [   64.320980] R13: 0000000000000000 R14: 00007fff660e1c40 R15: 00007f5c99b989c0
      [   64.323515] Code: e8 e8 79 08 ff 4c 89 ff 45 0f b6 a7 b8 01 00 00 e8 68 7c 08 ff 49 8b 1f 4d 89 e5 49 c1 e4 04 48 8
      [   64.330753] RIP: rdma_join_multicast+0x26e/0x12c0 RSP: ffff8801c8207860
      [   64.332979] CR2: 00000000000000b0
      [   64.335550] ---[ end trace 0c00c17a408849c1 ]---
      
      Reported-by: <syzbot+e6aba77967bd72cbc9d6@syzkaller.appspotmail.com>
      Fixes: c8f6a362
      
       ("RDMA/cma: Add multicast communication support")
      Signed-off-by: default avatarLeon Romanovsky <leonro@mellanox.com>
      Reviewed-by: default avatarSean Hefty <sean.hefty@intel.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      7688f2c3
    • Tatyana Nikolova's avatar
      RDMA/core: Do not use invalid destination in determining port reuse · 9dea9a2f
      Tatyana Nikolova authored
      cma_port_is_unique() allows local port reuse if the quad (source
      address and port, destination address and port) for this connection
      is unique. However, if the destination info is zero or unspecified, it
      can't make a correct decision but still allows port reuse. For example,
      sometimes rdma_bind_addr() is called with unspecified destination and
      reusing the port can lead to creating a connection with a duplicate quad,
      after the destination is resolved. The issue manifests when MPI scale-up
      tests hang after the duplicate quad is used.
      
      Set the destination address family and add checks for zero destination
      address and port to prevent source port reuse based on invalid destination.
      
      Fixes: 19b752a1
      
       ("IB/cma: Allow port reuse for rdma_id")
      Reviewed-by: default avatarSean Hefty <sean.hefty@intel.com>
      Signed-off-by: default avatarTatyana Nikolova <tatyana.e.nikolova@intel.com>
      Signed-off-by: default avatarShiraz Saleem <shiraz.saleem@intel.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      9dea9a2f
    • Leon Romanovsky's avatar
      RDMA/mlx5: Fix crash while accessing garbage pointer and freed memory · f3f134f5
      Leon Romanovsky authored
      The failure in rereg_mr flow caused to set garbage value (error value)
      into mr->umem pointer. This pointer is accessed at the release stage
      and it causes to the following crash.
      
      There is not enough to simply change umem to point to NULL, because the
      MR struct is needed to be accessed during MR deregistration phase, so
      delay kfree too.
      
      [    6.237617] BUG: unable to handle kernel NULL pointer dereference a 0000000000000228
      [    6.238756] IP: ib_dereg_mr+0xd/0x30
      [    6.239264] PGD 80000000167eb067 P4D 80000000167eb067 PUD 167f9067 PMD 0
      [    6.240320] Oops: 0000 [#1] SMP PTI
      [    6.240782] CPU: 0 PID: 367 Comm: dereg Not tainted 4.16.0-rc1-00029-gc198fafe0453 #183
      [    6.242120] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.7.5-0-ge51488c-20140602_164612-nilsson.home.kraxel.org 04/01/2014
      [    6.244504] RIP: 0010:ib_dereg_mr+0xd/0x30
      [    6.245253] RSP: 0018:ffffaf5d001d7d68 EFLAGS: 00010246
      [    6.246100] RAX: 0000000000000000 RBX: ffff95d4172daf00 RCX: 0000000000000000
      [    6.247414] RDX: 00000000ffffffff RSI: 0000000000000001 RDI: ffff95d41a317600
      [    6.248591] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
      [    6.249810] R10: ffff95d417033c10 R11: 0000000000000000 R12: ffff95d4172c3a80
      [    6.251121] R13: ffff95d4172c3720 R14: ffff95d4172c3a98 R15: 00000000ffffffff
      [    6.252437] FS:  0000000000000000(0000) GS:ffff95d41fc00000(0000) knlGS:0000000000000000
      [    6.253887] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
      [    6.254814] CR2: 0000000000000228 CR3: 00000000172b4000 CR4: 00000000000006b0
      [    6.255943] Call Trace:
      [    6.256368]  remove_commit_idr_uobject+0x1b/0x80
      [    6.257118]  uverbs_cleanup_ucontext+0xe4/0x190
      [    6.257855]  ib_uverbs_cleanup_ucontext.constprop.14+0x19/0x40
      [    6.258857]  ib_uverbs_close+0x2a/0x100
      [    6.259494]  __fput+0xca/0x1c0
      [    6.259938]  task_work_run+0x84/0xa0
      [    6.260519]  do_exit+0x312/0xb40
      [    6.261023]  ? __do_page_fault+0x24d/0x490
      [    6.261707]  do_group_exit+0x3a/0xa0
      [    6.262267]  SyS_exit_group+0x10/0x10
      [    6.262802]  do_syscall_64+0x75/0x180
      [    6.263391]  entry_SYSCALL_64_after_hwframe+0x21/0x86
      [    6.264253] RIP: 0033:0x7f1b39c49488
      [    6.264827] RSP: 002b:00007ffe2de05b68 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
      [    6.266049] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1b39c49488
      [    6.267187] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
      [    6.268377] RBP: 00007f1b39f258e0 R08: 00000000000000e7 R09: ffffffffffffff98
      [    6.269640] R10: 00007f1b3a147260 R11: 0000000000000246 R12: 00007f1b39f258e0
      [    6.270783] R13: 00007f1b39f2ac20 R14: 0000000000000000 R15: 0000000000000000
      [    6.271943] Code: 74 07 31 d2 e9 25 d8 6c 00 b8 da ff ff ff c3 0f 1f
      44 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 8b 07 53 48 8b
      5f 08 <48> 8b 80 28 02 00 00 e8 f7 d7 6c 00 85 c0 75 04 3e ff 4b 18 5b
      [    6.274927] RIP: ib_dereg_mr+0xd/0x30 RSP: ffffaf5d001d7d68
      [    6.275760] CR2: 0000000000000228
      [    6.276200] ---[ end trace a35641f1c474bd20 ]---
      
      Fixes: e126ba97
      
       ("mlx5: Add driver for Mellanox Connect-IB adapters")
      Cc: syzkaller <syzkaller@googlegroups.com>
      Cc: <stable@vger.kernel.org>
      Reported-by: default avatarNoa Osherovich <noaos@mellanox.com>
      Signed-off-by: default avatarLeon Romanovsky <leonro@mellanox.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      f3f134f5
  3. 13 Mar, 2018 2 commits
    • Boris Pismenny's avatar
      IB/mlx5: Fix integer overflows in mlx5_ib_create_srq · c2b37f76
      Boris Pismenny authored
      This patch validates user provided input to prevent integer overflow due
      to integer manipulation in the mlx5_ib_create_srq function.
      
      Cc: syzkaller <syzkaller@googlegroups.com>
      Fixes: e126ba97
      
       ("mlx5: Add driver for Mellanox Connect-IB adapters")
      Signed-off-by: default avatarBoris Pismenny <borisp@mellanox.com>
      Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      c2b37f76
    • Boris Pismenny's avatar
      IB/mlx5: Fix out-of-bounds read in create_raw_packet_qp_rq · 2c292dbb
      Boris Pismenny authored
      Add a check for the length of the qpin structure to prevent out-of-bounds reads
      
      BUG: KASAN: slab-out-of-bounds in create_raw_packet_qp+0x114c/0x15e2
      Read of size 8192 at addr ffff880066b99290 by task syz-executor3/549
      
      CPU: 3 PID: 549 Comm: syz-executor3 Not tainted 4.15.0-rc2+ #27 Hardware
      name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.7.5-0-ge51488c-20140602_164612-nilsson.home.kraxel.org 04/01/2014
      Call Trace:
       dump_stack+0x8d/0xd4
       print_address_description+0x73/0x290
       kasan_report+0x25c/0x370
       ? create_raw_packet_qp+0x114c/0x15e2
       memcpy+0x1f/0x50
       create_raw_packet_qp+0x114c/0x15e2
       ? create_raw_packet_qp_tis.isra.28+0x13d/0x13d
       ? lock_acquire+0x370/0x370
       create_qp_common+0x2245/0x3b50
       ? destroy_qp_user.isra.47+0x100/0x100
       ? kasan_kmalloc+0x13d/0x170
       ? sched_clock_cpu+0x18/0x180
       ? fs_reclaim_acquire.part.15+0x5/0x30
       ? __lock_acquire+0xa11/0x1da0
       ? sched_clock_cpu+0x18/0x180
       ? kmem_cache_alloc_trace+0x17e/0x310
       ? mlx5_ib_create_qp+0x30e/0x17b0
       mlx5_ib_create_qp+0x33d/0x17b0
       ? sched_clock_cpu+0x18/0x180
       ? create_qp_common+0x3b50/0x3b50
       ? lock_acquire+0x370/0x370
       ? __radix_tree_lookup+0x180/0x220
       ? uverbs_try_lock_object+0x68/0xc0
       ? rdma_lookup_get_uobject+0x114/0x240
       create_qp.isra.5+0xce4/0x1e20
       ? ib_uverbs_ex_create_cq_cb+0xa0/0xa0
       ? copy_ah_attr_from_uverbs.isra.2+0xa00/0xa00
       ? ib_uverbs_cq_event_handler+0x160/0x160
       ? __might_fault+0x17c/0x1c0
       ib_uverbs_create_qp+0x21b/0x2a0
       ? ib_uverbs_destroy_cq+0x2e0/0x2e0
       ib_uverbs_write+0x55a/0xad0
       ? ib_uverbs_destroy_cq+0x2e0/0x2e0
       ? ib_uverbs_destroy_cq+0x2e0/0x2e0
       ? ib_uverbs_open+0x760/0x760
       ? futex_wake+0x147/0x410
       ? check_prev_add+0x1680/0x1680
       ? do_futex+0x3d3/0xa60
       ? sched_clock_cpu+0x18/0x180
       __vfs_write+0xf7/0x5c0
       ? ib_uverbs_open+0x760/0x760
       ? kernel_read+0x110/0x110
       ? lock_acquire+0x370/0x370
       ? __fget+0x264/0x3b0
       vfs_write+0x18a/0x460
       SyS_write+0xc7/0x1a0
       ? SyS_read+0x1a0/0x1a0
       ? trace_hardirqs_on_thunk+0x1a/0x1c
       entry_SYSCALL_64_fastpath+0x18/0x85
      RIP: 0033:0x4477b9
      RSP: 002b:00007f1822cadc18 EFLAGS: 00000292 ORIG_RAX: 0000000000000001
      RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00000000004477b9
      RDX: 0000000000000070 RSI: 000000002000a000 RDI: 0000000000000005
      RBP: 0000000000708000 R08: 0000000000000000 R09: 0000000000000000
      R10: 0000000000000000 R11: 0000000000000292 R12: 00000000ffffffff
      R13: 0000000000005d70 R14: 00000000006e6e30 R15: 0000000020010ff0
      
      Allocated by task 549:
       __kmalloc+0x15e/0x340
       kvmalloc_node+0xa1/0xd0
       create_user_qp.isra.46+0xd42/0x1610
       create_qp_common+0x2e63/0x3b50
       mlx5_ib_create_qp+0x33d/0x17b0
       create_qp.isra.5+0xce4/0x1e20
       ib_uverbs_create_qp+0x21b/0x2a0
       ib_uverbs_write+0x55a/0xad0
       __vfs_write+0xf7/0x5c0
       vfs_write+0x18a/0x460
       SyS_write+0xc7/0x1a0
       entry_SYSCALL_64_fastpath+0x18/0x85
      
      Freed by task 368:
       kfree+0xeb/0x2f0
       kernfs_fop_release+0x140/0x180
       __fput+0x266/0x700
       task_work_run+0x104/0x180
       exit_to_usermode_loop+0xf7/0x110
       syscall_return_slowpath+0x298/0x370
       entry_SYSCALL_64_fastpath+0x83/0x85
      
      The buggy address belongs to the object at ffff880066b99180  which
      belongs to the cache kmalloc-512 of size 512 The buggy address is
      located 272 bytes inside of  512-byte region [ffff880066b99180,
      ffff880066b99380) The buggy address belongs to the page:
      page:000000006040eedd count:1 mapcount:0 mapping:          (null)
      index:0x0 compound_mapcount: 0
      flags: 0x4000000000008100(slab|head)
      raw: 4000000000008100 0000000000000000 0000000000000000 0000000180190019
      raw: ffffea00019a7500 0000000b0000000b ffff88006c403080 0000000000000000
      page dumped because: kasan: bad access detected
      
      Memory state around the buggy address:
       ffff880066b99180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
       ffff880066b99200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
      >ffff880066b99280: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                               ^
       ffff880066b99300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
       ffff880066b99380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
      
      Cc: syzkaller <syzkaller@googlegroups.com>
      Fixes: 0fb2ed66
      
       ("IB/mlx5: Add create and destroy functionality for Raw Packet QP")
      Signed-off-by: default avatarBoris Pismenny <borisp@mellanox.com>
      Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      2c292dbb
  4. 09 Mar, 2018 2 commits
    • Leon Romanovsky's avatar
      RDMA/mlx5: Fix integer overflow while resizing CQ · 28e9091e
      Leon Romanovsky authored
      The user can provide very large cqe_size which will cause to integer
      overflow as it can be seen in the following UBSAN warning:
      
      =======================================================================
      UBSAN: Undefined behaviour in drivers/infiniband/hw/mlx5/cq.c:1192:53
      signed integer overflow:
      64870 * 65536 cannot be represented in type 'int'
      CPU: 0 PID: 267 Comm: syzkaller605279 Not tainted 4.15.0+ #90 Hardware
      name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
      rel-1.7.5-0-ge51488c-20140602_164612-nilsson.home.kraxel.org 04/01/2014
      Call Trace:
       dump_stack+0xde/0x164
       ? dma_virt_map_sg+0x22c/0x22c
       ubsan_epilogue+0xe/0x81
       handle_overflow+0x1f3/0x251
       ? __ubsan_handle_negate_overflow+0x19b/0x19b
       ? lock_acquire+0x440/0x440
       mlx5_ib_resize_cq+0x17e7/0x1e40
       ? cyc2ns_read_end+0x10/0x10
       ? native_read_msr_safe+0x6c/0x9b
       ? cyc2ns_read_end+0x10/0x10
       ? mlx5_ib_modify_cq+0x220/0x220
       ? sched_clock_cpu+0x18/0x200
       ? lookup_get_idr_uobject+0x200/0x200
       ? rdma_lookup_get_uobject+0x145/0x2f0
       ib_uverbs_resize_cq+0x207/0x3e0
       ? ib_uverbs_ex_create_cq+0x250/0x250
       ib_uverbs_write+0x7f9/0xef0
       ? cyc2ns_read_end+0x10/0x10
       ? print_irqtrace_events+0x280/0x280
       ? ib_uverbs_ex_create_cq+0x250/0x250
       ? uverbs_devnode+0x110/0x110
       ? sched_clock_cpu+0x18/0x200
       ? do_raw_spin_trylock+0x100/0x100
       ? __lru_cache_add+0x16e/0x290
       __vfs_write+0x10d/0x700
       ? uverbs_devnode+0x110/0x110
       ? kernel_read+0x170/0x170
       ? sched_clock_cpu+0x18/0x200
       ? security_file_permission+0x93/0x260
       vfs_write+0x1b0/0x550
       SyS_write+0xc7/0x1a0
       ? SyS_read+0x1a0/0x1a0
       ? trace_hardirqs_on_thunk+0x1a/0x1c
       entry_SYSCALL_64_fastpath+0x1e/0x8b
      RIP: 0033:0x433549
      RSP: 002b:00007ffe63bd1ea8 EFLAGS: 00000217
      =======================================================================
      
      Cc: syzkaller <syzkaller@googlegroups.com>
      Cc: <stable@vger.kernel.org> # 3.13
      Fixes: bde51583
      
       ("IB/mlx5: Add support for resize CQ")
      Reported-by: default avatarNoa Osherovich <noaos@mellanox.com>
      Reviewed-by: default avatarYishai Hadas <yishaih@mellanox.com>
      Signed-off-by: default avatarLeon Romanovsky <leonro@mellanox.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      28e9091e
    • Doug Ledford's avatar
      Revert "RDMA/mlx5: Fix integer overflow while resizing CQ" · 212a0cbc
      Doug Ledford authored
      The original commit of this patch has a munged log message that is
      missing several of the tags the original author intended to be on the
      patch.  This was due to patchworks misinterpreting a cut-n-paste
      separator line as an end of message line and munging the mbox that was
      used to import the patch:
      
      https://patchwork.kernel.org/patch/10264089/
      
      The original patch will be reapplied with a fixed commit message so the
      proper tags are applied.
      
      This reverts commit aa0de36a
      
      .
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      212a0cbc
  5. 07 Mar, 2018 14 commits
  6. 28 Feb, 2018 9 commits
  7. 21 Feb, 2018 1 commit
    • Leon Romanovsky's avatar
      RDMA/uverbs: Fix kernel panic while using XRC_TGT QP type · f4576587
      Leon Romanovsky authored
      Attempt to modify XRC_TGT QP type from the user space (ibv_xsrq_pingpong
      invocation) will trigger the following kernel panic. It is caused by the
      fact that such QPs missed uobject initialization.
      
      [   17.408845] BUG: unable to handle kernel NULL pointer dereference at 0000000000000048
      [   17.412645] IP: rdma_lookup_put_uobject+0x9/0x50
      [   17.416567] PGD 0 P4D 0
      [   17.419262] Oops: 0000 [#1] SMP PTI
      [   17.422915] CPU: 0 PID: 455 Comm: ibv_xsrq_pingpo Not tainted 4.16.0-rc1+ #86
      [   17.424765] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.7.5-0-ge51488c-20140602_164612-nilsson.home.kraxel.org 04/01/2014
      [   17.427399] RIP: 0010:rdma_lookup_put_uobject+0x9/0x50
      [   17.428445] RSP: 0018:ffffb8c7401e7c90 EFLAGS: 00010246
      [   17.429543] RAX: 0000000000000000 RBX: ffffb8c7401e7cf8 RCX: 0000000000000000
      [   17.432426] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000000
      [   17.437448] RBP: 0000000000000000 R08: 00000000000218f0 R09: ffffffff8ebc4cac
      [   17.440223] R10: fffff6038052cd80 R11: ffff967694b36400 R12: ffff96769391f800
      [   17.442184] R13: ffffb8c7401e7cd8 R14: 0000000000000000 R15: ffff967699f60000
      [   17.443971] FS:  00007fc29207d700(0000) GS:ffff96769fc00000(0000) knlGS:0000000000000000
      [   17.446623] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
      [   17.448059] CR2: 0000000000000048 CR3: 000000001397a000 CR4: 00000000000006b0
      [   17.449677] Call Trace:
      [   17.450247]  modify_qp.isra.20+0x219/0x2f0
      [   17.451151]  ib_uverbs_modify_qp+0x90/0xe0
      [   17.452126]  ib_uverbs_write+0x1d2/0x3c0
      [   17.453897]  ? __handle_mm_fault+0x93c/0xe40
      [   17.454938]  __vfs_write+0x36/0x180
      [   17.455875]  vfs_write+0xad/0x1e0
      [   17.456766]  SyS_write+0x52/0xc0
      [   17.457632]  do_syscall_64+0x75/0x180
      [   17.458631]  entry_SYSCALL_64_after_hwframe+0x21/0x86
      [   17.460004] RIP: 0033:0x7fc29198f5a0
      [   17.460982] RSP: 002b:00007ffccc71f018 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
      [   17.463043] RAX: ffffffffffffffda RBX: 0000000000000078 RCX: 00007fc29198f5a0
      [   17.464581] RDX: 0000000000000078 RSI: 00007ffccc71f050 RDI: 0000000000000003
      [   17.466148] RBP: 0000000000000000 R08: 0000000000000078 R09: 00007ffccc71f050
      [   17.467750] R10: 000055b6cf87c248 R11: 0000000000000246 R12: 00007ffccc71f300
      [   17.469541] R13: 000055b6cf8733a0 R14: 0000000000000000 R15: 0000000000000000
      [   17.471151] Code: 00 00 0f 1f 44 00 00 48 8b 47 48 48 8b 00 48 8b 40 10 e9 0b 8b 68 00 90 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 53 89 f5 <48> 8b 47 48 48 89 fb 40 0f b6 f6 48 8b 00 48 8b 40 20 e8 e0 8a
      [   17.475185] RIP: rdma_lookup_put_uobject+0x9/0x50 RSP: ffffb8c7401e7c90
      [   17.476841] CR2: 0000000000000048
      [   17.477764] ---[ end trace 1dbcc5354071a712 ]---
      [   17.478880] Kernel panic - not syncing: Fatal exception
      [   17.480277] Kernel Offset: 0xd000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
      
      Fixes: 2f08ee36
      
       ("RDMA/restrack: don't use uaccess_kernel()")
      Signed-off-by: default avatarLeon Romanovsky <leonro@mellanox.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      f4576587
  8. 20 Feb, 2018 4 commits