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Date: Fri, 1 Jun 2007 02:26:51 +0000 From: "young dave" <hidave.darkstar@...il.com> To: "Andrew Morton" <akpm@...ux-foundation.org> Cc: "Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>, "Jaroslav Kysela" <perex@...e.cz> Subject: Re: [patch -mm] alsa mixer_oss kfree fix Hi, Just append to my email. The reason I read mixer_oss.c is that I see oops in 2.6.22-rc1-mm1, seems oops in mixer_oss.c, but the oops rised only once, I found rc3-mm1 have no change in this file, so I read the source , then post this patch. please find the oops message below: BUG: unable to handle kernel NULL pointer dereference at virtual address 00000088 printing eip: c0162bc2 *pde = 00000000 Oops: 0000 [#1] PREEMPT Modules linked in: snd_mixer_oss snd_hda_intel snd_pcm snd_timer snd_page_alloc snd soundcore ipv6 capability commoncap e100 mi i agpgart pcspkr psmouse CPU: 0 EIP: 0060:[<c0162bc2>] Not tainted VLI EFLAGS: 00010087 (2.6.22-rc1-mm1 #7) EIP is at kfree+0x42/0x90 eax: 00000000 ebx: c10568e0 ecx: c2b47000 edx: c01588d2 esi: 00000287 edi: 00000000 ebp: c2864000 esp: c2865f58 ds: 007b es: 007b fs: 0000 gs: 0033 ss: 0068 Process modprobe (pid: 2963, ti=c2864000 task=c1ede540 task.ti=c2864000) Stack: 00000011 f8855000 c0520cb4 00000001 00000001 c1e524a0 c1051bc0 c01588d2 0805c348 00000001 c2864000 f885502b f8840a00 00000000 00000001 c013caf1 00004b79 00000000 000b7f68 00000000 b7f44840 08065f88 0805c348 c01040bc Call Trace: [<f8855000>] alsa_mixer_oss_init+0x0/0x37 [snd_mixer_oss] [<c01588d2>] __vunmap+0xb2/0xe0 [<f885502b>] alsa_mixer_oss_init+0x2b/0x37 [snd_mixer_oss] [<c013caf1>] sys_init_module+0xa1/0x140 [<c01040bc>] syscall_call+0x7/0xb [<c0440000>] packet_seq_start+0x30/0x60 ======================= Code: 00 00 00 40 a1 40 6a 59 c0 c1 ea 0c c1 e2 05 01 c2 8b 02 89 d3 25 00 40 02 00 3d 00 40 02 00 74 45 8b 7b 10 8b 54 24 1c 9 c 5e fa <39> 9f 88 00 00 00 75 25 8b 03 a8 02 75 1f 0f b7 53 0a 8b 43 0c EIP: [<c0162bc2>] kfree+0x42/0x90 SS:ESP 0068:c2865f58 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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