Hello, Trinity discovered that writing 128 bytes to /proc/asound/card0/oss_mixer triggers a stack corruption.
Tommi # printf %128s > /proc/asound/card0/oss_mixer ALSA: mixer_oss: invalid OSS volume '' Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: ffffffff81e193ba CPU: 0 PID: 2778 Comm: bash Not tainted 3.17.0-rc1+ #13 Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 ffff880039fd4bf0 ffff880034c87bd8 ffffffff8229824a ffffffff828e2a40 ffff880034c87c50 ffffffff8229051d ffff880000000010 ffff880034c87c60 ffff880034c87c00 0000000000000020 ffffffff81e193ba 0000000000000080 Call Trace: [<ffffffff8229824a>] dump_stack+0x4d/0x66 [<ffffffff8229051d>] panic+0xc8/0x201 [<ffffffff81e193ba>] ? snd_mixer_oss_proc_write+0x24a/0x270 [<ffffffff8113c716>] __stack_chk_fail+0x16/0x20 [<ffffffff81e193ba>] snd_mixer_oss_proc_write+0x24a/0x270 [<ffffffff810a8a27>] ? kvm_clock_read+0x27/0x40 [<ffffffff81dfb54c>] snd_info_entry_release+0x6c/0x110 [<ffffffff812e9af6>] close_pdeo+0x136/0x1a0 [<ffffffff8118bec1>] ? __lock_acquire+0x951/0xb40 [<ffffffff810a8a27>] ? kvm_clock_read+0x27/0x40 [<ffffffff812e9b9e>] proc_reg_release+0x3e/0x60 [<ffffffff8127fa41>] __fput+0x111/0x1e0 [<ffffffff8127fb59>] ____fput+0x9/0x10 [<ffffffff8115e3ee>] task_work_run+0x9e/0xd0 [<ffffffff8106aaa5>] do_notify_resume+0x55/0x70 [<ffffffff822b12e2>] int_signal+0x12/0x17 Kernel Offset: 0x0 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffff9fffffff) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
