<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - [MCP79][Regression] Unhandled NULL pointer dereference in nvkm_object_unmap since kernel 4.15" href="https://bugs.freedesktop.org/show_bug.cgi?id=105173#c8">Comment # 8</a> on <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - [MCP79][Regression] Unhandled NULL pointer dereference in nvkm_object_unmap since kernel 4.15" href="https://bugs.freedesktop.org/show_bug.cgi?id=105173">bug 105173</a> from <a class="email" href="mailto:nvlbox@gmail.com" title="Nick Lee <nvlbox@gmail.com>"> Nick Lee</a> <pre>Also tried: Vanilla kernel 4.15.4-300.vanilla.knurd.1.fc27.x86_64 mesa-17.3.5 wayland session reproducible Fedora-Workstation-Live-x86_64-Rawhide-20180220.n.0.iso wayland session mesa-18.0.0-0.1.rc4.fc28.x86_64 Got artefacts with dmesg output: [ 1035.437016] nouveau 0000:03:00.0: swiotlb buffer is full (sz: 2097152 bytes) [ 1035.437020] nouveau 0000:03:00.0: swiotlb: coherent allocation failed, size=2097152 [ 1035.437023] CPU: 0 PID: 1842 Comm: gnome-shell Not tainted 4.16.0-0.rc2.git0.1.fc28.x86_64 #1 [ 1035.437024] Hardware name: NVIDIA MCP7A/MCP7A, BIOS 6.00 PG 04/22/2009 [ 1035.437025] Call Trace: [ 1035.437036] dump_stack+0x5c/0x85 [ 1035.437040] swiotlb_alloc_coherent+0x1c3/0x1e0 [ 1035.437052] ttm_dma_pool_get_pages+0x21a/0x620 [ttm] [ 1035.437057] ttm_dma_populate+0xdd/0x390 [ttm] [ 1035.437062] ttm_tt_bind+0x2e/0x60 [ttm] [ 1035.437067] ttm_bo_handle_move_mem+0x4cf/0x550 [ttm] [ 1035.437073] ttm_bo_validate+0x119/0x130 [ttm] [ 1035.437104] ? drm_get_edid_switcheroo+0x16/0x40 [drm] [ 1035.437109] ttm_bo_init_reserved+0x334/0x380 [ttm] [ 1035.437114] ? ttm_bo_init+0x62/0xd0 [ttm] [ 1035.437190] ? nouveau_bo_invalidate_caches+0x10/0x10 [nouveau] [ 1035.437226] ? nouveau_bo_new+0x401/0x580 [nouveau] [ 1035.437262] ? nouveau_bo_invalidate_caches+0x10/0x10 [nouveau] [ 1035.437298] ? nouveau_gem_new+0x120/0x120 [nouveau] [ 1035.437334] ? nouveau_gem_new+0x5d/0x120 [nouveau] [ 1035.437370] ? nouveau_gem_ioctl_new+0x53/0xe0 [nouveau] [ 1035.437381] ? drm_ioctl_kernel+0x5b/0xb0 [drm] [ 1035.437392] ? drm_ioctl+0x1c4/0x380 [drm] [ 1035.437428] ? nouveau_gem_new+0x120/0x120 [nouveau] [ 1035.437431] ? eventfd_write+0x94/0x2a0 [ 1035.437467] ? nouveau_drm_ioctl+0x65/0xc0 [nouveau] [ 1035.437470] ? do_vfs_ioctl+0xa4/0x610 [ 1035.437471] ? SyS_ioctl+0x74/0x80 [ 1035.437475] ? do_syscall_64+0x74/0x180 [ 1035.437478] ? entry_SYSCALL_64_after_hwframe+0x3d/0xa2</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>