Re: crash by cdc_acm driver in kernels 4.8-rc1/5

[Wim Osterholt]

On Thu, Sep 08, 2016 at 03:05:15PM +0200, Oliver Neukum wrote:
> 
> your stack trace is broken. Did you fail to install the System.map file?
> 
> 	Regards
> 		Oliver

A laptop, more broken than the rest, does not output anything after
inserting. Later on it crashes. No system.map file in /boot.
After booting with the dongle inserted it spits out:

[   17.204261] fbcon: radeondrmfb (fb0) is primary device
[   17.276234] BUG: unable to handle kernel NULL pointer dereference at 00000007
[   17.276266] IP: [<d080d2e0>] acm_probe+0x450/0xed0 [cdc_acm]
[   17.276272] *pde = 00000000 
[   17.276278] Oops: 0000 [#1] PREEMPT SMP
[   17.276362] Modules linked in: cdc_acm(+) radeon(+) fbcon i2c_algo_bit bitblit softcursor font drm_kms_helper cfbfillrect syscopyarea cfbimgblt sysfillrect sysimgblt fb_sys_fops cfbcopyarea ttm snd_intel8x0m snd_intel8x0 pcmcia snd_ac97_codec drm dell_smm_hwmon hwmon ipw2200 fb uhci_hcd fbdev ehci_pci yenta_socket ehci_hcd ac97_bus snd_pcm dcdbas libipw usbcore pcmcia_rsrc pcmcia_core snd_timer lib80211 cfg80211 3c59x snd serio_raw intel_agp soundcore usb_common 8250_pci mii video intel_gtt agpgart 8250 8250_base parport_pc parport serial_core
[   17.276371] CPU: 0 PID: 1311 Comm: udevd Not tainted 4.8.0-rc5 #1
[   17.276375] Hardware name: Dell Computer Corporation Inspiron 4100                   /Inspiron 4100            , BIOS A13 05/16/2003
[   17.276379] task: cf9667c0 task.stack: cf10a000
[   17.276385] EIP: 0060:[<d080d2e0>] EFLAGS: 00010202 CPU: 0
[   17.276400] EIP is at acm_probe+0x450/0xed0 [cdc_acm]
[   17.276404] EAX: 00000004 EBX: cbb62800 ECX: 00000040 EDX: 00000040
[   17.276409] ESI: 00000000 EDI: 00000000 EBP: cf10bd00 ESP: cf10bc60
[   17.276413]  DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
[   17.276418] CR0: 80050033 CR2: 00000007 CR3: 0f07f000 CR4: 000006d0
[   17.276420] Stack:
[   17.276435]  00000000 00000082 00000012 00000000 000046dd cf29ac80 cf9e6238 cf90cb84
[   17.276448]  cf801c08 00000012 000045c0 00000080 cf9e6200 cf88d960 00000010 cc884470
[   17.276462]  cc884400 00000001 cf194a00 cf193000 cf194a00 c14f00ff cc8844f8 cf9667c0
[   17.276464] Call Trace:
[   17.276486]  [<c14f00ff>] ? _raw_spin_unlock_irqrestore+0xf/0x30
[   17.276498]  [<c106d139>] ? preempt_count_add+0x89/0x90
[   17.276505]  [<c106d139>] ? preempt_count_add+0x89/0x90
[   17.276512]  [<c14f02f1>] ? _raw_spin_lock_irqsave+0x11/0x40
[   17.276611]  [<d0b144cc>] ? usb_probe_interface+0xfc/0x2d0 [usbcore]
[   17.276657]  [<d0b144cc>] ? usb_probe_interface+0xfc/0x2d0 [usbcore]
[   17.276675]  [<c1317aef>] ? driver_probe_device+0x1ff/0x400
[   17.276682]  [<c1317aef>] ? driver_probe_device+0x1ff/0x400
[   17.276691]  [<c1317dc9>] ? __driver_attach+0xd9/0x100
[   17.276698]  [<c1317dc9>] ? __driver_attach+0xd9/0x100
[   17.276706]  [<c14f02bd>] ? _raw_spin_lock+0xd/0x30
[   17.276712]  [<c14f00cd>] ? _raw_spin_unlock+0xd/0x30
[   17.276720]  [<c1317cf0>] ? driver_probe_device+0x400/0x400
[   17.276728]  [<c1315ca7>] ? bus_for_each_dev+0x47/0x80
[   17.276735]  [<c1315ca7>] ? bus_for_each_dev+0x47/0x80
[   17.276743]  [<c1317441>] ? driver_attach+0x11/0x20
[   17.276750]  [<c1317cf0>] ? driver_probe_device+0x400/0x400
[   17.276757]  [<c1316f9f>] ? bus_add_driver+0x1df/0x270
[   17.276764]  [<c14f00cd>] ? _raw_spin_unlock+0xd/0x30
[   17.276777]  [<c126c714>] ? kset_find_obj+0x44/0x90
[   17.276785]  [<c131874e>] ? driver_register+0x4e/0xc0
[   17.276791]  [<c131874e>] ? driver_register+0x4e/0xc0
[   17.276837]  [<d0b1330a>] ? usb_register_driver+0x5a/0x110 [usbcore]
[   17.276852]  [<d07f90a7>] ? acm_init+0xa7/0xd6 [cdc_acm]
[   17.276857]  [<d07f9000>] ? 0xd07f9000
[   17.276864]  [<c100048d>] ? do_one_initcall+0x2d/0x130
[   17.276880]  [<c10f56c9>] ? do_init_module+0x19/0x1a0
[   17.276889]  [<c10f56f8>] ? do_init_module+0x48/0x1a0
[   17.276900]  [<c10b7cc7>] ? load_module+0x19c7/0x2150
[   17.276913]  [<c113ef33>] ? kernel_read_file+0x103/0x200
[   17.276922]  [<c10b85f0>] ? SyS_finit_module+0x90/0xd0
[   17.276929]  [<c10b85f0>] ? SyS_finit_module+0x90/0xd0
[   17.276940]  [<c10016c8>] ? do_int80_syscall_32+0x38/0x90
[   17.276946]  [<c10016c8>] ? do_int80_syscall_32+0x38/0x90
[   17.276954]  [<c14f07da>] ? entry_INT80_32+0x2a/0x2a
[   17.277046] Code: 04 89 b3 c0 04 00 00 8d 04 80 c1 e0 02 89 83 b4 04 00 00 8b 45 a8 89 43 04 8b 45 ac 89 43 08 8b 45 a0 89 03 8b 45 c0 85 c0 74 0a <0f> b6 40 03 89 83 c8 04 00 00 f6 45 a4 04 74 07 83 a3 c8 04 00
[   17.277065] EIP: [<d080d2e0>] acm_probe+0x450/0xed0 [cdc_acm] SS:ESP 0068:cf10bc60
[   17.277068] CR2: 0000000000000007
[   17.277360] ---[ end trace 5847748dfb454f14 ]---
[   17.280317] udevd[1295]: worker [1311] terminated by signal 9 (Killed)
[   17.280333] udevd[1295]: worker [1311] failed while handling '/devices/pci0000:00/0000:00:1d.0/usb1/1-1/1-1:1.0'