Am 2020-09-15 um 5:52 p.m. schrieb Philip Yang: > Set ttm->sg to NULL after kfree, to avoid memory corruption backtrace: > > [ 420.932812] kernel BUG at > /build/linux-do9eLF/linux-4.15.0/mm/slub.c:295! > [ 420.934182] invalid opcode: 0000 [#1] SMP NOPTI > [ 420.935445] Modules linked in: xt_conntrack ipt_MASQUERADE > [ 420.951332] Hardware name: Dell Inc. PowerEdge R7525/0PYVT1, BIOS > 1.5.4 07/09/2020 > [ 420.952887] RIP: 0010:__slab_free+0x180/0x2d0 > [ 420.954419] RSP: 0018:ffffbe426291fa60 EFLAGS: 00010246 > [ 420.955963] RAX: ffff9e29263e9c30 RBX: ffff9e29263e9c30 RCX: > 000000018100004b > [ 420.957512] RDX: ffff9e29263e9c30 RSI: fffff3d33e98fa40 RDI: > ffff9e297e407a80 > [ 420.959055] RBP: ffffbe426291fb00 R08: 0000000000000001 R09: > ffffffffc0d39ade > [ 420.960587] R10: ffffbe426291fb20 R11: ffff9e49ffdd4000 R12: > ffff9e297e407a80 > [ 420.962105] R13: fffff3d33e98fa40 R14: ffff9e29263e9c30 R15: > ffff9e2954464fd8 > [ 420.963611] FS: 00007fa2ea097780(0000) GS:ffff9e297e840000(0000) > knlGS:0000000000000000 > [ 420.965144] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 420.966663] CR2: 00007f16bfffefb8 CR3: 0000001ff0c62000 CR4: > 0000000000340ee0 > [ 420.968193] Call Trace: > [ 420.969703] ? __page_cache_release+0x3c/0x220 > [ 420.971294] ? amdgpu_ttm_tt_unpopulate+0x5e/0x80 [amdgpu] > [ 420.972789] kfree+0x168/0x180 > [ 420.974353] ? amdgpu_ttm_tt_set_user_pages+0x64/0xc0 [amdgpu] > [ 420.975850] ? kfree+0x168/0x180 > [ 420.977403] amdgpu_ttm_tt_unpopulate+0x5e/0x80 [amdgpu] > [ 420.978888] ttm_tt_unpopulate.part.10+0x53/0x60 [amdttm] > [ 420.980357] ttm_tt_destroy.part.11+0x4f/0x60 [amdttm] > [ 420.981814] ttm_tt_destroy+0x13/0x20 [amdttm] > [ 420.983273] ttm_bo_cleanup_memtype_use+0x36/0x80 [amdttm] > [ 420.984725] ttm_bo_release+0x1c9/0x360 [amdttm] > [ 420.986167] amdttm_bo_put+0x24/0x30 [amdttm] > [ 420.987663] amdgpu_bo_unref+0x1e/0x30 [amdgpu] > [ 420.989165] amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu+0x9ca/0xb10 > [amdgpu] > [ 420.990666] kfd_ioctl_alloc_memory_of_gpu+0xef/0x2c0 [amdgpu] > > Signed-off-by: Philip Yang <Philip.Yang@xxxxxxx> Reviewed-by: Felix Kuehling <Felix.Kuehling@xxxxxxx> > --- > drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c > index 8b704451a18c..4b3ab9a25e91 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c > @@ -1076,6 +1076,7 @@ static int amdgpu_ttm_tt_pin_userptr(struct ttm_tt *ttm) > > release_sg: > kfree(ttm->sg); > + ttm->sg = NULL; > return r; > } > _______________________________________________ amd-gfx mailing list amd-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/amd-gfx
