Hello Felix Rublack, I do not know if the maintainer are able to reproduce this issue, but instead or additional to the strace a backtrace of the crash might help them. The easiest way might be to install systemd-coredump and look at "journalctl -e" after a crash. More info in [1]. (Even better with debug symbols installed.)
Nevertheless the segfault lines in dmesg lead to following locations in iris_dri.so: mpv/vo: function iris_resource_bo called from function stream_state: https://sources.debian.org/src/mesa/20.0.2-1/src/gallium/drivers/iris/iris_resource.h/#L290 https://sources.debian.org/src/mesa/20.0.2-1/src/gallium/drivers/iris/iris_blorp.c/#L60 until L63 vlc: glxgears: function GEN9_3DSTATE_VERTEX_ELEMENTS_pack called from iris_blorp_exec: file src/intel/genxml/gen9_pack.h, line 6901. (unfortunately a generated file?) maybe related to https://sources.debian.org/src/mesa/20.0.2-1/src/intel/blorp/blorp_genX_exec.h/#L550 Kind regards, Bernhard [1] https://wiki.debian.org/HowToGetABacktrace
From submitter: [ 37.001269] mpv/vo[1739]: segfault at a0 ip 00007fe5d34a62a8 sp 00007fe5e6092de0 error 4 in iris_dri.so[7fe5d2a8d000+d2e000] [ 37.001276] Code: 44 24 18 48 c7 44 24 10 00 00 00 00 48 c7 44 24 18 00 00 00 00 50 4c 8d 4c 24 18 e8 e2 a4 b6 ff 48 8b 44 24 18 31 d2 48 89 ef <4c> 8b b0 a0 00 00 00 4c 89 f6 e8 09 94 fd ff 48 8b bd 28 01 00 00 [ 46.419999] vlc[1778]: segfault at 24 ip 00007fcc272a4c06 sp 00007fcbf9e01c50 error 6 in iris_dri.so[7fcc2688b000+d2e000] [ 46.420006] Code: 7e 30 44 01 ff 81 ff ff ff 00 00 0f 87 ab 17 00 00 49 01 c7 4c 89 7e 38 48 85 c0 0f 84 2c 02 00 00 83 ea 01 81 ca 00 00 09 78 <89> 10 48 8d 50 04 45 85 ed 74 74 41 8d 75 ff 48 8d 74 f0 0c 66 0f [ 57.343120] glxgears[1785]: segfault at 24 ip 00007f4a1467ec06 sp 00007ffd2389b2f0 error 6 in iris_dri.so[7f4a13c65000+d2e000] [ 57.343126] Code: 7e 30 44 01 ff 81 ff ff ff 00 00 0f 87 ab 17 00 00 49 01 c7 4c 89 7e 38 48 85 c0 0f 84 2c 02 00 00 83 ea 01 81 ca 00 00 09 78 <89> 10 48 8d 50 04 45 85 ed 74 74 41 8d 75 ff 48 8d 74 f0 0c 66 0f https://wiki.debian.org/InterpretingKernelOutputAtProcessCrash "error 4" == 0: no page found, 0: read access, 1: user-mode access "error 6" == 0: no page found, 1: write access, 1: user-mode access echo -n "find /b ..., ..., 0x" && \ > echo "44 24 18 48 c7 44 24 10 00 00 00 00 48 c7 44 24 18 00 00 00 00 50 4c 8d > 4c 24 18 e8 e2 a4 b6 ff 48 8b 44 24 18 31 d2 48 89 ef <4c> 8b b0 a0 00 00 00 > 4c 89 f6 e8 09 94 fd ff 48 8b bd 28 01 00 00" \ > | sed 's/[<>]//g' | sed 's/ /, 0x/g' find /b ..., ..., 0x44, 0x24, 0x18, 0x48, 0xc7, 0x44, 0x24, 0x10, 0x00, 0x00, 0x00, 0x00, 0x48, 0xc7, 0x44, 0x24, 0x18, 0x00, 0x00, 0x00, 0x00, 0x50, 0x4c, 0x8d, 0x4c, 0x24, 0x18, 0xe8, 0xe2, 0xa4, 0xb6, 0xff, 0x48, 0x8b, 0x44, 0x24, 0x18, 0x31, 0xd2, 0x48, 0x89, 0xef, 0x4c, 0x8b, 0xb0, 0xa0, 0x00, 0x00, 0x00, 0x4c, 0x89, 0xf6, 0xe8, 0x09, 0x94, 0xfd, 0xff, 0x48, 0x8b, 0xbd, 0x28, 0x01, 0x00, 0x00 $ echo -n "find /b ..., ..., 0x" && \ > echo "7e 30 44 01 ff 81 ff ff ff 00 00 0f 87 ab 17 00 00 49 01 c7 4c 89 7e 38 > 48 85 c0 0f 84 2c 02 00 00 83 ea 01 81 ca 00 00 09 78 <89> 10 48 8d 50 04 45 > 85 ed 74 74 41 8d 75 ff 48 8d 74 f0 0c 66 0f" \ > | sed 's/[<>]//g' | sed 's/ /, 0x/g' find /b ..., ..., 0x7e, 0x30, 0x44, 0x01, 0xff, 0x81, 0xff, 0xff, 0xff, 0x00, 0x00, 0x0f, 0x87, 0xab, 0x17, 0x00, 0x00, 0x49, 0x01, 0xc7, 0x4c, 0x89, 0x7e, 0x38, 0x48, 0x85, 0xc0, 0x0f, 0x84, 0x2c, 0x02, 0x00, 0x00, 0x83, 0xea, 0x01, 0x81, 0xca, 0x00, 0x00, 0x09, 0x78, 0x89, 0x10, 0x48, 0x8d, 0x50, 0x04, 0x45, 0x85, 0xed, 0x74, 0x74, 0x41, 0x8d, 0x75, 0xff, 0x48, 0x8d, 0x74, 0xf0, 0x0c, 0x66, 0x0f ############ # Unstable amd64 qemu VM 2020-04-04 apt update apt dist-upgrade apt install systemd-coredump sddm xserver-xorg openbox xterm gdb mesa-utils mesa-utils-dbgsym libgl1-mesa-dri-dbgsym gdb -q set width 0 set pagination off file /usr/bin/glxgears b main set environment LD_PRELOAD=/usr/lib/x86_64-linux-gnu/dri/iris_dri.so run dele 1 info share find ... b * (... + 42) info b $ gdb -q (gdb) set width 0 (gdb) set pagination off (gdb) file /usr/bin/glxgears Reading symbols from /usr/bin/glxgears... Reading symbols from /usr/lib/debug/.build-id/40/dc623a2c150d26c9229676fba7f45a49aed7d7.debug... (gdb) b main Breakpoint 1 at 0x2410: file glxgears.c, line 723. (gdb) set environment LD_PRELOAD=/usr/lib/x86_64-linux-gnu/dri/iris_dri.so (gdb) run Starting program: /usr/bin/glxgears [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". Breakpoint 1, main (argc=1, argv=0x7fffffffe608) at glxgears.c:723 723 glxgears.c: Datei oder Verzeichnis nicht gefunden. (gdb) dele 1 (gdb) info share From To Syms Read Shared Object Library ... 0x00007ffff6a5e010 0x00007ffff7788b1e Yes /usr/lib/x86_64-linux-gnu/dri/iris_dri.so ... (*): Shared library is missing debugging information. (gdb) find /b 0x00007ffff6a5e010, 0x00007ffff7788b1e, 0x44, 0x24, 0x18, 0x48, 0xc7, 0x44, 0x24, 0x10, 0x00, 0x00, 0x00, 0x00, 0x48, 0xc7, 0x44, 0x24, 0x18, 0x00, 0x00, 0x00, 0x00, 0x50, 0x4c, 0x8d, 0x4c, 0x24, 0x18, 0xe8, 0xe2, 0xa4, 0xb6, 0xff, 0x48, 0x8b, 0x44, 0x24, 0x18, 0x31, 0xd2, 0x48, 0x89, 0xef, 0x4c, 0x8b, 0xb0, 0xa0, 0x00, 0x00, 0x00, 0x4c, 0x89, 0xf6, 0xe8, 0x09, 0x94, 0xfd, 0xff, 0x48, 0x8b, 0xbd, 0x28, 0x01, 0x00, 0x00 0x7ffff747427e <stream_state+46> 1 pattern found. (gdb) b * (0x7ffff747427e + 42) Breakpoint 2 at 0x7ffff74742a8: file ../src/gallium/drivers/iris/iris_resource.h, line 290. (gdb) info b Num Type Disp Enb Address What 2 breakpoint keep y 0x00007ffff74742a8 in iris_resource_bo at ../src/gallium/drivers/iris/iris_resource.h:290 (gdb) disassemble /r (0x7ffff747427e + 42) -50, (0x7ffff747427e + 42) +30 Dump of assembler code from 0x7ffff7474276 to 0x7ffff74742c6: 0x00007ffff7474276 <stream_state+38>: 89 44 24 20 mov %eax,0x20(%rsp) 0x00007ffff747427a <stream_state+42>: 31 c0 xor %eax,%eax 0x00007ffff747427c <stream_state+44>: 48 8d 44 24 18 lea 0x18(%rsp),%rax 0x00007ffff7474281 <stream_state+49>: 48 c7 44 24 10 00 00 00 00 movq $0x0,0x10(%rsp) 0x00007ffff747428a <stream_state+58>: 48 c7 44 24 18 00 00 00 00 movq $0x0,0x18(%rsp) 0x00007ffff7474293 <stream_state+67>: 50 push %rax 0x00007ffff7474294 <stream_state+68>: 4c 8d 4c 24 18 lea 0x18(%rsp),%r9 0x00007ffff7474299 <stream_state+73>: e8 e2 a4 b6 ff callq 0x7ffff6fde780 <u_upload_alloc> 0x00007ffff747429e <stream_state+78>: 48 8b 44 24 18 mov 0x18(%rsp),%rax 0x00007ffff74742a3 <stream_state+83>: 31 d2 xor %edx,%edx 0x00007ffff74742a5 <stream_state+85>: 48 89 ef mov %rbp,%rdi >>>0x00007ffff74742a8 <stream_state+88>: 4c 8b b0 a0 00 00 00 >>>mov 0xa0(%rax),%r14 0x00007ffff74742af <stream_state+95>: 4c 89 f6 mov %r14,%rsi 0x00007ffff74742b2 <stream_state+98>: e8 09 94 fd ff callq 0x7ffff744d6c0 <iris_use_pinned_bo> 0x00007ffff74742b7 <stream_state+103>: 48 8b bd 28 01 00 00 mov 0x128(%rbp),%rdi 0x00007ffff74742be <stream_state+110>: 58 pop %rax 0x00007ffff74742bf <stream_state+111>: 5a pop %rdx 0x00007ffff74742c0 <stream_state+112>: 48 85 ff test %rdi,%rdi 0x00007ffff74742c3 <stream_state+115>: 74 0f je 0x7ffff74742d4 <stream_state+132> 0x00007ffff74742c5 <stream_state+117>: 41 8b 75 00 mov 0x0(%r13),%esi End of assembler dump. (gdb) b *0x00007ffff74742a5 Breakpoint 3 at 0x7ffff74742a5: file ../src/gallium/drivers/iris/iris_resource.h, line 290. (gdb) b *0x00007ffff74742a3 Breakpoint 4 at 0x7ffff74742a3: file ../src/gallium/drivers/iris/iris_resource.h, line 290. (gdb) b *0x00007ffff747429e Breakpoint 5 at 0x7ffff747429e: file ../src/gallium/drivers/iris/iris_resource.h, line 290. (gdb) b *0x00007ffff7474299 Breakpoint 6 at 0x7ffff7474299: file ../src/gallium/drivers/iris/iris_blorp.c, line 60. (gdb) info b Num Type Disp Enb Address What 2 breakpoint keep y 0x00007ffff74742a8 in iris_resource_bo at ../src/gallium/drivers/iris/iris_resource.h:290 3 breakpoint keep y 0x00007ffff7474c06 in GEN9_3DSTATE_VERTEX_ELEMENTS_pack at src/intel/genxml/gen9_pack.h:6901 4 breakpoint keep y 0x00007ffff74742a5 in stream_state at ../src/gallium/drivers/iris/iris_resource.h:290 5 breakpoint keep y 0x00007ffff74742a3 in stream_state at ../src/gallium/drivers/iris/iris_resource.h:290 6 breakpoint keep y 0x00007ffff747429e in iris_resource_bo at ../src/gallium/drivers/iris/iris_resource.h:290 - https://sources.debian.org/src/mesa/20.0.2-1/src/gallium/drivers/iris/iris_blorp.c/#L60 until L63 (gdb) find /b 0x00007ffff6a5e010, 0x00007ffff7788b1e, 0x7e, 0x30, 0x44, 0x01, 0xff, 0x81, 0xff, 0xff, 0xff, 0x00, 0x00, 0x0f, 0x87, 0xab, 0x17, 0x00, 0x00, 0x49, 0x01, 0xc7, 0x4c, 0x89, 0x7e, 0x38, 0x48, 0x85, 0xc0, 0x0f, 0x84, 0x2c, 0x02, 0x00, 0x00, 0x83, 0xea, 0x01, 0x81, 0xca, 0x00, 0x00, 0x09, 0x78, 0x89, 0x10, 0x48, 0x8d, 0x50, 0x04, 0x45, 0x85, 0xed, 0x74, 0x74, 0x41, 0x8d, 0x75, 0xff, 0x48, 0x8d, 0x74, 0xf0, 0x0c, 0x66, 0x0f 0x7ffff7474bdc <iris_blorp_exec+1820> 1 pattern found. (gdb) b * (0x7ffff7474bdc + 42) Breakpoint 7 at 0x7ffff7474c06: file src/intel/genxml/gen9_pack.h, line 6901. (gdb) info b Num Type Disp Enb Address What 7 breakpoint keep y 0x00007ffff7474c06 in GEN9_3DSTATE_VERTEX_ELEMENTS_pack at src/intel/genxml/gen9_pack.h:6901 (gdb) disassemble /r (0x7ffff7474bdc + 42) -50, (0x7ffff7474bdc + 42) +30 Dump of assembler code from 0x7ffff7474bd4 to 0x7ffff7474c24: 0x00007ffff7474bd4 <iris_blorp_exec+1812>: 8b 46 38 mov 0x38(%rsi),%eax 0x00007ffff7474bd7 <iris_blorp_exec+1815>: 48 89 c7 mov %rax,%rdi 0x00007ffff7474bda <iris_blorp_exec+1818>: 48 2b 7e 30 sub 0x30(%rsi),%rdi 0x00007ffff7474bde <iris_blorp_exec+1822>: 44 01 ff add %r15d,%edi 0x00007ffff7474be1 <iris_blorp_exec+1825>: 81 ff ff ff 00 00 cmp $0xffff,%edi 0x00007ffff7474be7 <iris_blorp_exec+1831>: 0f 87 ab 17 00 00 ja 0x7ffff7476398 <iris_blorp_exec+7896> 0x00007ffff7474bed <iris_blorp_exec+1837>: 49 01 c7 add %rax,%r15 0x00007ffff7474bf0 <iris_blorp_exec+1840>: 4c 89 7e 38 mov %r15,0x38(%rsi) 0x00007ffff7474bf4 <iris_blorp_exec+1844>: 48 85 c0 test %rax,%rax 0x00007ffff7474bf7 <iris_blorp_exec+1847>: 0f 84 2c 02 00 00 je 0x7ffff7474e29 <iris_blorp_exec+2409> 0x00007ffff7474bfd <iris_blorp_exec+1853>: 83 ea 01 sub $0x1,%edx 0x00007ffff7474c00 <iris_blorp_exec+1856>: 81 ca 00 00 09 78 or $0x78090000,%edx >>>0x00007ffff7474c06 <iris_blorp_exec+1862>: 89 10 mov >>>%edx,(%rax) 0x00007ffff7474c08 <iris_blorp_exec+1864>: 48 8d 50 04 lea 0x4(%rax),%rdx 0x00007ffff7474c0c <iris_blorp_exec+1868>: 45 85 ed test %r13d,%r13d 0x00007ffff7474c0f <iris_blorp_exec+1871>: 74 74 je 0x7ffff7474c85 <iris_blorp_exec+1989> 0x00007ffff7474c11 <iris_blorp_exec+1873>: 41 8d 75 ff lea -0x1(%r13),%esi 0x00007ffff7474c15 <iris_blorp_exec+1877>: 48 8d 74 f0 0c lea 0xc(%rax,%rsi,8),%rsi 0x00007ffff7474c1a <iris_blorp_exec+1882>: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) 0x00007ffff7474c20 <iris_blorp_exec+1888>: 41 0f b6 46 04 movzbl 0x4(%r14),%eax End of assembler dump. (gdb) b *0x00007ffff7474c00 Breakpoint 8 at 0x7ffff7474c00: file src/intel/genxml/gen9_pack.h, line 6901. (gdb) b *0x00007ffff7474bfd Breakpoint 9 at 0x7ffff7474bfd: file src/intel/genxml/gen9_pack.h, line 6901. (gdb) b *0x00007ffff7474bf7 Breakpoint 10 at 0x7ffff7474bf7: file ../src/intel/blorp/blorp_genX_exec.h, line 550. (gdb) b *0x00007ffff7474bf4 Breakpoint 11 at 0x7ffff7474bf4: file ../src/intel/blorp/blorp_genX_exec.h, line 550. (gdb) b *0x00007ffff7474bf0 Breakpoint 12 at 0x7ffff7474bf0: file ../src/gallium/drivers/iris/iris_batch.h, line 193. (gdb) b *0x00007ffff7474bed Breakpoint 13 at 0x7ffff7474bed: file ../src/gallium/drivers/iris/iris_batch.h, line 193. (gdb) b *0x00007ffff7474be7 Breakpoint 14 at 0x7ffff7474be7: file ../src/gallium/drivers/iris/iris_batch.h, line 177. (gdb) b *0x00007ffff7474be1 Breakpoint 15 at 0x7ffff7474be1: file ../src/gallium/drivers/iris/iris_batch.h, line 177. (gdb) b *0x00007ffff7474bde Breakpoint 16 at 0x7ffff7474bde: file ../src/gallium/drivers/iris/iris_batch.h, line 177. (gdb) b *0x00007ffff7474bda Breakpoint 17 at 0x7ffff7474bda: file ../src/gallium/drivers/iris/iris_batch.h, line 177. (gdb) b *0x00007ffff7474bd7 Breakpoint 18 at 0x7ffff7474bd7: file ../src/gallium/drivers/iris/iris_batch.h, line 177. (gdb) b *0x00007ffff7474bd4 Breakpoint 19 at 0x7ffff7474bd4: file ../src/gallium/drivers/iris/iris_batch.h, line 191. (gdb) info b Num Type Disp Enb Address What ... 8 breakpoint keep y 0x00007ffff7474c00 in GEN9_3DSTATE_VERTEX_ELEMENTS_pack at src/intel/genxml/gen9_pack.h:6901 9 breakpoint keep y 0x00007ffff7474bfd in blorp_emit_vertex_elements at src/intel/genxml/gen9_pack.h:6901 10 breakpoint keep y 0x00007ffff7474bf7 in blorp_emit_vertex_elements at ../src/intel/blorp/blorp_genX_exec.h:550 11 breakpoint keep y 0x00007ffff7474bf4 in blorp_emit_vertex_elements at ../src/intel/blorp/blorp_genX_exec.h:550 12 breakpoint keep y 0x00007ffff7474bf0 in iris_get_command_space at ../src/gallium/drivers/iris/iris_batch.h:193 13 breakpoint keep y 0x00007ffff7474bed in iris_get_command_space at ../src/gallium/drivers/iris/iris_batch.h:193 14 breakpoint keep y 0x00007ffff7474be7 in iris_require_command_space at ../src/gallium/drivers/iris/iris_batch.h:177 15 breakpoint keep y 0x00007ffff7474be1 in iris_require_command_space at ../src/gallium/drivers/iris/iris_batch.h:177 16 breakpoint keep y 0x00007ffff7474bde in iris_require_command_space at ../src/gallium/drivers/iris/iris_batch.h:177 17 breakpoint keep y 0x00007ffff7474bda in iris_batch_bytes_used at ../src/gallium/drivers/iris/iris_batch.h:177 18 breakpoint keep y 0x00007ffff7474bd7 in iris_batch_bytes_used at ../src/gallium/drivers/iris/iris_batch.h:177 19 breakpoint keep y 0x00007ffff7474bd4 in iris_require_command_space at ../src/gallium/drivers/iris/iris_batch.h:191 - Maybe somewhere in https://sources.debian.org/src/mesa/20.0.2-1/src/intel/blorp/blorp_genX_exec.h/#L550