At Mon, 19 Dec 2011 12:13:34 +0100, Clemens Ladisch wrote:

Csillag Kristof wrote:

...

Lately, when experimenting with JACK, I began getting kernel crashes :(

I am using stock Debian kernel v3.1.5.

[ 7555.763914] BUG: unable to handle kernel NULL pointer dereference at 0000000000000028 [ 7555.763952] IP: [<ffffffffa08ca7b8>] setup_bdle.isra.21+0x44/0xd9 [snd_hda_intel] [ 7555.764735] RAX: 0000000000000000 RBX: ffff880221825e00 RCX: 0000000000000000 [ 7555.765126] Call Trace: [ 7555.765170] [<ffffffffa08caa5c>] ? azx_pcm_prepare+0x20f/0x3c7 [snd_hda_intel] [ 7555.765589] Code: 8b 32 e9 94 00 00 00 81 7d 00 ff 00 00 00 0f 87 96 00 00 00 48 8b 83 c0 00 00 00 44 89 e2 44 89 e6 48 89 df 48 8b 80 d8 02 00 00 [ 7555.765683] 8b 48 28 48 89 d0 81 e2 ff 0f 00 00 48 c1 e8 0c 48 c1 e0 04

7: 81 7d 00 ff 00 00 00 cmpl $0xff,0x0(%rbp) e: 0f 87 96 00 00 00 ja aa 14: 48 8b 83 c0 00 00 00 mov 0xc0(%rbx),%rax 1b: 44 89 e2 mov %r12d,%edx 1e: 44 89 e6 mov %r12d,%esi 21: 48 89 df mov %rbx,%rdi 24: 48 8b 80 d8 02 00 00 mov 0x2d8(%rax),%rax 2b: ?? 8b 48 28 mov 0x28(%rax),%r?? <-- crash here 2f: 48 89 d0 mov %rdx,%rax 32: 81 e2 ff 0f 00 00 and $0xfff,%edx 38: 48 c1 e8 0c shr $0xc,%rax 3c: 48 c1 e0 04 shl $0x4,%rax

substream->runtime->dma_buffer_p is NULL.

...

https://bugzilla.redhat.com/show_bug.cgi?id=702056 https://bugzilla.redhat.com/show_bug.cgi?id=718056 https://bugzilla.redhat.com/show_bug.cgi?id=749186

Same bug.

Is this a regression? If so, does 3.0.x kernel work?

thanks,

Takashi