Hello, I am just trying to get the source line from the dmesg code line.
[ 97.073761] bluetoothd[838]: segfault at 561314652a23 ip 000056167406a375 sp 00007fffb128a200 error 4 in bluetoothd[561674048000+ec000] likely on CPU 11 (core 5, socket 0) [ 97.073799] Code: 00 31 c0 e9 54 ff ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 41 55 41 54 55 53 48 83 ec 08 48 8b 2a 48 8b 7a 08 <48> 8b 45 20 4c 8b ad 88 00 00 00 4c 8b 20 48 85 ff 74 19 c7 47 08
And it points to function a2dp_suspend_complete, [transport.c:431]. This function leads to upstream report [701], which should be fixed since release 5.72 [83cfad1]. Kind regards, Bernhard [transport.c:431] https://sources.debian.org/src/bluez/5.71-1/profiles/audio/transport.c/#L431 [701] https://github.com/bluez/bluez/issues/701 [83cfad1] https://github.com/bluez/bluez/commit/83cfad1badee6aae77eb15177ccc917249ab9bb3
[ 97.073761] bluetoothd[838]: segfault at 561314652a23 ip 000056167406a375 sp 00007fffb128a200 error 4 in bluetoothd[561674048000+ec000] likely on CPU 11 (core 5, socket 0) [ 97.073799] Code: 00 31 c0 e9 54 ff ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 41 55 41 54 55 53 48 83 ec 08 48 8b 2a 48 8b 7a 08 <48> 8b 45 20 4c 8b ad 88 00 00 00 4c 8b 20 48 85 ff 74 19 c7 47 08 https://wiki.debian.org/InterpretingKernelOutputAtProcessCrash error 4 == 0b00000100: * bit 0 == 0: no page found * bit 1 == 0: read access * bit 2 == 1: user-mode access . # 2024-05-01 trixie/testing amd64 qemu VM apt dist-upgrade apt install gdb bluez bluez-dbgsym apt build-dep bluez mkdir /home/benutzer/source/bluez/orig -p cd /home/benutzer/source/bluez/orig apt source bluez echo -n "find /b ..., ..., 0x" && \ echo "00 31 c0 e9 54 ff ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 41 55 41 54 55 53 48 83 ec 08 48 8b 2a 48 8b 7a 08 <48> 8b 45 20 4c 8b ad 88 00 00 00 4c 8b 20 48 85 ff 74 19 c7 47 08" \ | sed 's/[<>]//g' | sed 's/ /, 0x/g' gdb -q set width 0 set pagination off file /usr/sbin/bluetoothd tb main run pipe info target | grep -E "\.text$" find /b 0x00005555555798f0, 0x0000555555663b30, 0x00, 0x31, 0xc0, 0xe9, 0x54, 0xff, 0xff, 0xff, 0x66, 0x66, 0x2e, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00, 0x66, 0x90, 0xf3, 0x0f, 0x1e, 0xfa, 0x41, 0x55, 0x41, 0x54, 0x55, 0x53, 0x48, 0x83, 0xec, 0x08, 0x48, 0x8b, 0x2a, 0x48, 0x8b, 0x7a, 0x08, 0x48, 0x8b, 0x45, 0x20, 0x4c, 0x8b, 0xad, 0x88, 0x00, 0x00, 0x00, 0x4c, 0x8b, 0x20, 0x48, 0x85, 0xff, 0x74, 0x19, 0xc7, 0x47, 0x08 b * (0x55555559a34b + 42) info b disassemble /r 0x55555559a34b, 0x55555559a34b + 62 directory /home/benutzer/source/bluez/orig/bluez-5.71 benutzer@debian:~$ gdb -q (gdb) set width 0 (gdb) set pagination off (gdb) file /usr/sbin/bluetoothd Reading symbols from /usr/sbin/bluetoothd... Reading symbols from /usr/lib/debug/.build-id/b3/ec9634ecf4f0995fa44119b844150cc8d98db5.debug... (gdb) tb main Temporary breakpoint 1 at 0x25bd0: file src/main.c, line 1355. (gdb) run Starting program: /usr/sbin/bluetoothd [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". Temporary breakpoint 1, main (argc=1, argv=0x7fffffffe478) at src/main.c:1355 1355 src/main.c: Datei oder Verzeichnis nicht gefunden. (gdb) pipe info target | grep -E "\.text$" 0x00005555555798f0 - 0x0000555555663b30 is .text (gdb) find /b 0x00005555555798f0, 0x0000555555663b30, 0x00, 0x31, 0xc0, 0xe9, 0x54, 0xff, 0xff, 0xff, 0x66, 0x66, 0x2e, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00, 0x66, 0x90, 0xf3, 0x0f, 0x1e, 0xfa, 0x41, 0x55, 0x41, 0x54, 0x55, 0x53, 0x48, 0x83, 0xec, 0x08, 0x48, 0x8b, 0x2a, 0x48, 0x8b, 0x7a, 0x08, 0x48, 0x8b, 0x45, 0x20, 0x4c, 0x8b, 0xad, 0x88, 0x00, 0x00, 0x00, 0x4c, 0x8b, 0x20, 0x48, 0x85, 0xff, 0x74, 0x19, 0xc7, 0x47, 0x08 0x55555559a34b <resume_a2dp+283> 1 pattern found. (gdb) b * (0x55555559a34b + 42) Breakpoint 2 at 0x55555559a375: file profiles/audio/transport.c, line 431. (gdb) info b Num Type Disp Enb Address What 2 breakpoint keep y 0x000055555559a375 in a2dp_suspend_complete at profiles/audio/transport.c:431 (gdb) disassemble /r 0x55555559a34b, 0x55555559a34b + 62 Dump of assembler code from 0x55555559a34b to 0x55555559a389: ... 0x000055555559a360 <a2dp_suspend_complete+0>: f3 0f 1e fa endbr64 0x000055555559a364 <a2dp_suspend_complete+4>: 41 55 push %r13 0x000055555559a366 <a2dp_suspend_complete+6>: 41 54 push %r12 0x000055555559a368 <a2dp_suspend_complete+8>: 55 push %rbp 0x000055555559a369 <a2dp_suspend_complete+9>: 53 push %rbx 0x000055555559a36a <a2dp_suspend_complete+10>: 48 83 ec 08 sub $0x8,%rsp 0x000055555559a36e <a2dp_suspend_complete+14>: 48 8b 2a mov (%rdx),%rbp 0x000055555559a371 <a2dp_suspend_complete+17>: 48 8b 7a 08 mov 0x8(%rdx),%rdi 0x000055555559a375 <a2dp_suspend_complete+21>: 48 8b 45 20 mov 0x20(%rbp),%rax <<<<<<<<<<<<< 0x000055555559a379 <a2dp_suspend_complete+25>: 4c 8b ad 88 00 00 00 mov 0x88(%rbp),%r13 0x000055555559a380 <a2dp_suspend_complete+32>: 4c 8b 20 mov (%rax),%r12 0x000055555559a383 <a2dp_suspend_complete+35>: 48 85 ff test %rdi,%rdi 0x000055555559a386 <a2dp_suspend_complete+38>: 74 19 je 0x55555559a3a1 <a2dp_suspend_complete+65> 0x000055555559a388 <a2dp_suspend_complete+40>: c7 47 08 00 00 00 00 movl $0x0,0x8(%rdi) End of assembler dump. (gdb) directory /home/benutzer/source/bluez/orig/bluez-5.71 Source directories searched: /home/benutzer/source/bluez/orig/bluez-5.71:$cdir:$cwd (gdb) list a2dp_suspend_complete 421 422 static void a2dp_suspend_complete(struct avdtp *session, int err, 423 void *user_data) 424 { 425 struct media_owner *owner = user_data; 426 struct media_transport *transport = owner->transport; 427 struct a2dp_transport *a2dp = transport->data; 428 struct a2dp_sep *sep = media_endpoint_get_sep(transport->endpoint); 429 430 /* Release always succeeds */ 431 if (owner->pending) { 432 owner->pending->id = 0; 433 media_request_reply(owner->pending, 0); 434 media_owner_remove(owner); 435 } 436 437 a2dp_sep_unlock(sep, a2dp->session); 438 transport_set_state(transport, TRANSPORT_STATE_IDLE); 439 media_transport_remove_owner(transport); 440 } 441 https://sources.debian.org/src/bluez/5.71-1/profiles/audio/transport.c/#L431 https://github.com/bluez/bluez/issues/701 https://github.com/bluez/bluez/issues/708 https://github.com/bluez/bluez/commit/83cfad1badee6aae77eb15177ccc917249ab9bb3 Patch is already included in 5.72 https://github.com/bluez/bluez/commits/5.72/
