xe_vm_bind_ioctl leaks memory during Vulkan CTS

Using kmemleak, after running Vulkan CTS I can see a bunch of memory leaks. I'm running LNL, btw.

[16260.714730] kmemleak: 2602 new suspected memory leaks (see /sys/kernel/debug/kmemleak)

Examples:

unreferenced object 0xffff9120bdf62000 (size 8192):
  comm "deqp-vk", pid 115008, jiffies 4310295728
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 1b 05 f9 28 01 00 00 40  ...........(...@
    00 00 00 00 00 00 00 00 1b 15 f9 28 01 00 00 40  ...........(...@
  backtrace (crc 7a56be79):
    [<ffffffff86dd81f0>] __kmalloc_cache_noprof+0x310/0x3d0
    [<ffffffffc08e8211>] xe_pt_new_shared.constprop.0+0x81/0xb0 [xe]
    [<ffffffffc08e8309>] xe_pt_insert_entry+0xb9/0x140 [xe]
    [<ffffffffc08eab6d>] xe_pt_stage_bind_entry+0x12d/0x5b0 [xe]
    [<ffffffffc08ecbca>] xe_pt_walk_range+0xea/0x280 [xe]
    [<ffffffffc08eccea>] xe_pt_walk_range+0x20a/0x280 [xe]
    [<ffffffffc08eccea>] xe_pt_walk_range+0x20a/0x280 [xe]
    [<ffffffffc08eccea>] xe_pt_walk_range+0x20a/0x280 [xe]
    [<ffffffffc08eccea>] xe_pt_walk_range+0x20a/0x280 [xe]
    [<ffffffffc08e9eff>] xe_pt_stage_bind.constprop.0+0x25f/0x580 [xe]
    [<ffffffffc08eb21a>] bind_op_prepare+0xea/0x6e0 [xe]
    [<ffffffffc08ebab8>] xe_pt_update_ops_prepare+0x1c8/0x440 [xe]
    [<ffffffffc08ffbf3>] ops_execute+0x143/0x850 [xe]
    [<ffffffffc0900b64>] vm_bind_ioctl_ops_execute+0x244/0x800 [xe]
    [<ffffffffc0906467>] xe_vm_bind_ioctl+0x1877/0x2370 [xe]
    [<ffffffffc05e92b3>] drm_ioctl_kernel+0xb3/0x110 [drm]
unreferenced object 0xffff9120bdf72000 (size 8192):
  comm "deqp-vk", pid 115008, jiffies 4310295728
  hex dump (first 32 bytes):
    6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
    6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
  backtrace (crc 23b2f0b5):
    [<ffffffff86dd81f0>] __kmalloc_cache_noprof+0x310/0x3d0
    [<ffffffffc08e8211>] xe_pt_new_shared.constprop.0+0x81/0xb0 [xe]
    [<ffffffffc08e8453>] xe_pt_stage_unbind_post_descend+0xb3/0x150 [xe]
    [<ffffffffc08ecd26>] xe_pt_walk_range+0x246/0x280 [xe]
    [<ffffffffc08eccea>] xe_pt_walk_range+0x20a/0x280 [xe]
    [<ffffffffc08eccea>] xe_pt_walk_range+0x20a/0x280 [xe]
    [<ffffffffc08eccea>] xe_pt_walk_range+0x20a/0x280 [xe]
    [<ffffffffc08ece31>] xe_pt_walk_shared+0xc1/0x110 [xe]
    [<ffffffffc08e7b2a>] xe_pt_stage_unbind+0x9a/0xd0 [xe]
    [<ffffffffc08e913d>] unbind_op_prepare+0xdd/0x270 [xe]
    [<ffffffffc08eb9f6>] xe_pt_update_ops_prepare+0x106/0x440 [xe]
    [<ffffffffc08ffbf3>] ops_execute+0x143/0x850 [xe]
    [<ffffffffc0900b64>] vm_bind_ioctl_ops_execute+0x244/0x800 [xe]
    [<ffffffffc0906467>] xe_vm_bind_ioctl+0x1877/0x2370 [xe]
    [<ffffffffc05e92b3>] drm_ioctl_kernel+0xb3/0x110 [drm]
    [<ffffffffc05e95a0>] drm_ioctl+0x280/0x4e0 [drm]
unreferenced object 0xffff9120bdf7a000 (size 8192):
  comm "deqp-vk", pid 115008, jiffies 4310295728
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 03 07 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 03 07 00 00 00 00 00 00  ................
  backtrace (crc abc72cd0):
    [<ffffffff86dd81f0>] __kmalloc_cache_noprof+0x310/0x3d0
    [<ffffffffc08e8211>] xe_pt_new_shared.constprop.0+0x81/0xb0 [xe]
    [<ffffffffc08e8309>] xe_pt_insert_entry+0xb9/0x140 [xe]
    [<ffffffffc08eab6d>] xe_pt_stage_bind_entry+0x12d/0x5b0 [xe]
    [<ffffffffc08ecbca>] xe_pt_walk_range+0xea/0x280 [xe]
    [<ffffffffc08eccea>] xe_pt_walk_range+0x20a/0x280 [xe]
    [<ffffffffc08eccea>] xe_pt_walk_range+0x20a/0x280 [xe]
    [<ffffffffc08eccea>] xe_pt_walk_range+0x20a/0x280 [xe]
    [<ffffffffc08eccea>] xe_pt_walk_range+0x20a/0x280 [xe]
    [<ffffffffc08e9eff>] xe_pt_stage_bind.constprop.0+0x25f/0x580 [xe]
    [<ffffffffc08eb21a>] bind_op_prepare+0xea/0x6e0 [xe]
    [<ffffffffc08ebb71>] xe_pt_update_ops_prepare+0x281/0x440 [xe]
    [<ffffffffc08ffbf3>] ops_execute+0x143/0x850 [xe]
    [<ffffffffc0900b64>] vm_bind_ioctl_ops_execute+0x244/0x800 [xe]
    [<ffffffffc0906467>] xe_vm_bind_ioctl+0x1877/0x2370 [xe]
    [<ffffffffc05e92b3>] drm_ioctl_kernel+0xb3/0x110 [drm]
unreferenced object 0xffff9120bdf82000 (size 8192):
  comm "deqp-vk", pid 115008, jiffies 4310295728
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 1b 05 88 2d 02 00 00 40  ...........-...@
    00 00 00 00 00 00 00 00 1b 15 88 2d 02 00 00 40  ...........-...@
  backtrace (crc 8e20477b):
    [<ffffffff86dd81f0>] __kmalloc_cache_noprof+0x310/0x3d0
    [<ffffffffc08e8211>] xe_pt_new_shared.constprop.0+0x81/0xb0 [xe]
    [<ffffffffc08e8309>] xe_pt_insert_entry+0xb9/0x140 [xe]
    [<ffffffffc08eab6d>] xe_pt_stage_bind_entry+0x12d/0x5b0 [xe]
    [<ffffffffc08ecbca>] xe_pt_walk_range+0xea/0x280 [xe]
    [<ffffffffc08eccea>] xe_pt_walk_range+0x20a/0x280 [xe]
    [<ffffffffc08eccea>] xe_pt_walk_range+0x20a/0x280 [xe]
    [<ffffffffc08eccea>] xe_pt_walk_range+0x20a/0x280 [xe]
    [<ffffffffc08eccea>] xe_pt_walk_range+0x20a/0x280 [xe]
    [<ffffffffc08e9eff>] xe_pt_stage_bind.constprop.0+0x25f/0x580 [xe]
    [<ffffffffc08eb21a>] bind_op_prepare+0xea/0x6e0 [xe]
    [<ffffffffc08ebab8>] xe_pt_update_ops_prepare+0x1c8/0x440 [xe]
    [<ffffffffc08ffbf3>] ops_execute+0x143/0x850 [xe]
    [<ffffffffc0900b64>] vm_bind_ioctl_ops_execute+0x244/0x800 [xe]
    [<ffffffffc0906467>] xe_vm_bind_ioctl+0x1877/0x2370 [xe]
    [<ffffffffc05e92b3>] drm_ioctl_kernel+0xb3/0x110 [drm]
unreferenced object 0xffff9120bdfca000 (size 8192):
  comm "deqp-vk", pid 115008, jiffies 4310295728
  hex dump (first 32 bytes):
    6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
    6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
  backtrace (crc 23b2f0b5):
    [<ffffffff86dd81f0>] __kmalloc_cache_noprof+0x310/0x3d0
    [<ffffffffc08e8211>] xe_pt_new_shared.constprop.0+0x81/0xb0 [xe]
    [<ffffffffc08e8453>] xe_pt_stage_unbind_post_descend+0xb3/0x150 [xe]
    [<ffffffffc08ecd26>] xe_pt_walk_range+0x246/0x280 [xe]
    [<ffffffffc08eccea>] xe_pt_walk_range+0x20a/0x280 [xe]
    [<ffffffffc08eccea>] xe_pt_walk_range+0x20a/0x280 [xe]
    [<ffffffffc08eccea>] xe_pt_walk_range+0x20a/0x280 [xe]
    [<ffffffffc08ece31>] xe_pt_walk_shared+0xc1/0x110 [xe]
    [<ffffffffc08e7b2a>] xe_pt_stage_unbind+0x9a/0xd0 [xe]
    [<ffffffffc08e913d>] unbind_op_prepare+0xdd/0x270 [xe]
    [<ffffffffc08eba9b>] xe_pt_update_ops_prepare+0x1ab/0x440 [xe]
    [<ffffffffc08ffbf3>] ops_execute+0x143/0x850 [xe]
    [<ffffffffc0900b64>] vm_bind_ioctl_ops_execute+0x244/0x800 [xe]
    [<ffffffffc0906467>] xe_vm_bind_ioctl+0x1877/0x2370 [xe]
    [<ffffffffc05e92b3>] drm_ioctl_kernel+0xb3/0x110 [drm]
    [<ffffffffc05e95a0>] drm_ioctl+0x280/0x4e0 [drm]
unreferenced object 0xffff9120bdfd2000 (size 8192):
  comm "deqp-vk", pid 115008, jiffies 4310295728
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 1b 05 11 df 01 00 00 40  ...............@
    00 00 00 00 00 00 00 00 1b 15 11 df 01 00 00 40  ...............@
  backtrace (crc ec71d56):
    [<ffffffff86dd81f0>] __kmalloc_cache_noprof+0x310/0x3d0
    [<ffffffffc08e8211>] xe_pt_new_shared.constprop.0+0x81/0xb0 [xe]
    [<ffffffffc08e8309>] xe_pt_insert_entry+0xb9/0x140 [xe]
    [<ffffffffc08eab6d>] xe_pt_stage_bind_entry+0x12d/0x5b0 [xe]
    [<ffffffffc08ecbca>] xe_pt_walk_range+0xea/0x280 [xe]
    [<ffffffffc08eccea>] xe_pt_walk_range+0x20a/0x280 [xe]
    [<ffffffffc08eccea>] xe_pt_walk_range+0x20a/0x280 [xe]
    [<ffffffffc08eccea>] xe_pt_walk_range+0x20a/0x280 [xe]
    [<ffffffffc08eccea>] xe_pt_walk_range+0x20a/0x280 [xe]
    [<ffffffffc08e9eff>] xe_pt_stage_bind.constprop.0+0x25f/0x580 [xe]
    [<ffffffffc08eb21a>] bind_op_prepare+0xea/0x6e0 [xe]
    [<ffffffffc08ebab8>] xe_pt_update_ops_prepare+0x1c8/0x440 [xe]
    [<ffffffffc08ffbf3>] ops_execute+0x143/0x850 [xe]
    [<ffffffffc0900b64>] vm_bind_ioctl_ops_execute+0x244/0x800 [xe]
    [<ffffffffc0906467>] xe_vm_bind_ioctl+0x1877/0x2370 [xe]
    [<ffffffffc05e92b3>] drm_ioctl_kernel+0xb3/0x110 [drm]

See the attached kmemleak.txt file, but it all seems instances of the same problem as above: nobody seems to be freeing the 8k allocated by xe_pt_new_shared().

kmemleak.tar.gz

Cc: @mbrost