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Date: Fri, 22 Jan 2010 17:07:42 +0300 From: Sergey Lapin <slapinid@...il.com> To: me@...ipebalbi.com Cc: felipe.balbi@...ia.com, "linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>, "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, David Brownell <dbrownell@...rs.sourceforge.net> Subject: Re: MUSB crash on OMAP3 board with second load of gadget 0 at 1:38 PM, Sergey Lapin <slapinid@...il.com> wrote: > Hi, > >> [ 580.082427] [<c0030ac4>] (__irq_svc+0x44/0xa8) from [<c00420dc>] >> (omap3_enter_idle+0x124/0x158) >> [ 580.091186] [<c00420dc>] (omap3_enter_idle+0x124/0x158) from >> [<c022d708>] (cpuidle_idle_call+0xa4/0x180) >> [ 580.100738] [<c022d708>] (cpuidle_idle_call+0xa4/0x180) from >> [<c00324dc>] (cpu_idle+0x48/0x98) >> [ 580.109436] [<c00324dc>] (cpu_idle+0x48/0x98) from [<c0008934>] >> (start_kernel+0x268/0x2c8) >> [ 580.117767] [<c0008934>] (start_kernel+0x268/0x2c8) from >> [<80008034>] (0x80008034) >> [ 580.125366] Code: c03a876b e92d4013 e5903004 e1a04000 (e593c000) >> [ 580.131652] ---[ end trace 42b8f4f7e396999c ]--- >> [ 580.136291] Kernel panic - not syncing: Fatal exception in interrupt >> > > I've managed to debug that in my case, > drivers/usb/musb/musb_gadget_ep0.c: > musb_read_setup(): > /* clean up any leftover transfers */ > r = next_ep0_request(musb); > in this place we have somewhat corrupted usb_request. Any ideas why? > > By the way, crash is not reproduced if cable is removed before module unloading > (and all USB activity processed). > > S. > Is this panic looks like list corruption bug which was mentioned earlier? with my new test script I get these panic messages with the same frequency as 6b6b6b6b ones. If I understand right, 6b6b6b6b = slab corruption, and 00200200 = LIST_POISON2, which means list corruption. [ 275.079284] Unable to handle kernel paging request at virtual address 00200200 [ 275.086578] pgd = c0004000 [ 275.089294] [00200200] *pgd=00000000 [ 275.092895] Internal error: Oops: 5 [#1] PREEMPT [ 275.097534] last sysfs file: /sys/module/musb_hdrc/parameters/debug [ 275.103851] Modules linked in: g_mass_storage [last unloaded: g_mass_storage] [ 275.111053] CPU: 0 Not tainted (2.6.33-rc5-07242-gb226820-dirty #14) [ 275.117828] PC is at list_del+0xc/0x90 [ 275.121582] LR is at musb_g_giveback+0x20/0x118 [ 275.126159] pc : [<c01b71cc>] lr : [<c021daa4>] psr: 200001d3 [ 275.126159] sp : c03f7db0 ip : 00074df4 fp : c7832048 [ 275.137725] r10: fa0ab000 r9 : fa0ab100 r8 : fa0ab100 [ 275.142974] r7 : 00000001 r6 : c7832064 r5 : 00000000 r4 : c718c618 [ 275.149536] r3 : 00200200 r2 : 00000000 r1 : c718c600 r0 : c718c618 [ 275.156097] Flags: nzCv IRQs off FIQs off Mode SVC_32 ISA ARM Segment kernel [ 275.163635] Control: 10c5387d Table: 8725c019 DAC: 00000017 [ 275.169403] Process swapper (pid: 0, stack limit = 0xc03f62e8) [ 275.175292] Stack: (0xc03f7db0 to 0xc03f8000) [ 275.179687] 7da0: c718c618 c718c600 c718c600 c021daa4 [ 275.187896] 7dc0: c7832048 c02f10dc c03affcf c03f7ddc c718c618 c718c600 00000000 c7832000 [ 275.196136] 7de0: 00000001 c021c3c4 00000006 00000100 00000000 00000040 c03f6000 06800099 [ 275.204376] 7e00: 00000100 00000040 00000000 00000000 000000f0 c7832000 00000008 00000099 [ 275.212615] 7e20: 00000000 00000000 00000000 c021b4f0 00000008 00000001 00000000 00000000 [ 275.220855] 7e40: c7832000 60000153 0000005c c03f6000 0000005c c021b628 c78bdc80 c78bdc80 [ 275.229095] 7e60: 0000005c c0090d58 c78bdc80 c04099cc 0000005c 00000104 00000103 c03f6000 [ 275.237304] 7e80: 00000002 c0092e1c 0000005c c03f7f40 00000000 c0030070 ffffffff fa200000 [ 275.245544] 7ea0: 00000000 c0030ac4 00000000 00000003 00000000 c0436700 0000005c c03f6000 [ 275.253784] 7ec0: 00000000 00000002 00000001 0000000a 00000002 00000000 00074c9f c03f7ef0 [ 275.262023] 7ee0: c0063e28 c0063e40 20000153 ffffffff c78bdc80 c78bdc80 0000005c 00000000 [ 275.270263] 7f00: c78bdc80 0000005c 00000000 00000003 00000002 00000001 c03f6000 0000001f [ 275.278472] 7f20: 00000000 c006401c 0000005c c0030074 ffffffff fa200000 00000003 c0030ac4 [ 275.286743] 7f40: 002e19b8 00000000 002e19b8 00000000 c04316b4 00000003 00000003 c04316b4 [ 275.294982] 7f60: 800273e0 411fc082 0000001f 00000000 00000000 c03f7f88 c00420ec c00420f8 [ 275.303222] 7f80: 60000053 ffffffff 00000000 002e19b8 386d712e 178b0dd5 386d712e 175cf41d [ 275.311462] 7fa0: c03fbd50 c03fbe20 c0430cdc c03fbd50 c0476b48 c022d93c c03f6000 c0430cdc [ 275.319702] 7fc0: c0029014 c03f9c10 800273e0 c00324dc c045c9c0 c0008934 c000848c 00000000 [ 275.327911] 7fe0: 00000000 c0029018 00000000 10c53c7d c0430df0 80008034 00000000 00000000 [ 275.336181] [<c01b71cc>] (list_del+0xc/0x90) from [<c021daa4>] (musb_g_giveback+0x20/0x118) [ 275.344573] [<c021daa4>] (musb_g_giveback+0x20/0x118) from [<c021c3c4>] (musb_g_ep0_irq+0x358/0x940) [ 275.353790] [<c021c3c4>] (musb_g_ep0_irq+0x358/0x940) from [<c021b4f0>] (musb_interrupt+0x2fc/0x3d4) [ 275.362976] [<c021b4f0>] (musb_interrupt+0x2fc/0x3d4) from [<c021b628>] (generic_interrupt+0x60/0x94) [ 275.372283] [<c021b628>] (generic_interrupt+0x60/0x94) from [<c0090d58>] (handle_IRQ_event+0xa4/0x1e0) [ 275.381652] [<c0090d58>] (handle_IRQ_event+0xa4/0x1e0) from [<c0092e1c>] (handle_level_irq+0xc0/0x150) [ 275.391052] [<c0092e1c>] (handle_level_irq+0xc0/0x150) from [<c0030070>] (asm_do_IRQ+0x70/0x90) [ 275.399810] [<c0030070>] (asm_do_IRQ+0x70/0x90) from [<c0030ac4>] (__irq_svc+0x44/0xa8) [ 275.407867] Exception stack(0xc03f7ea8 to 0xc03f7ef0) [ 275.412933] 7ea0: 00000000 00000003 00000000 c0436700 0000005c c03f6000 [ 275.421173] 7ec0: 00000000 00000002 00000001 0000000a 00000002 00000000 00074c9f c03f7ef0 [ 275.429412] 7ee0: c0063e28 c0063e40 20000153 ffffffff [ 275.434509] [<c0030ac4>] (__irq_svc+0x44/0xa8) from [<c0063e40>] (__do_softirq+0x54/0x1e8) [ 275.442840] [<c0063e40>] (__do_softirq+0x54/0x1e8) from [<c006401c>] (irq_exit+0x48/0x9c) [ 275.451080] [<c006401c>] (irq_exit+0x48/0x9c) from [<c0030074>] (asm_do_IRQ+0x74/0x90) [ 275.459045] [<c0030074>] (asm_do_IRQ+0x74/0x90) from [<c0030ac4>] (__irq_svc+0x44/0xa8) [ 275.467102] Exception stack(0xc03f7f40 to 0xc03f7f88) [ 275.472198] 7f40: 002e19b8 00000000 002e19b8 00000000 c04316b4 00000003 00000003 c04316b4 [ 275.480438] 7f60: 800273e0 411fc082 0000001f 00000000 00000000 c03f7f88 c00420ec c00420f8 [ 275.488647] 7f80: 60000053 ffffffff [ 275.492187] [<c0030ac4>] (__irq_svc+0x44/0xa8) from [<c00420f8>] (omap3_enter_idle+0x124/0x15c) [ 275.500976] [<c00420f8>] (omap3_enter_idle+0x124/0x15c) from [<c022d93c>] (cpuidle_idle_call+0xa4/0x180) [ 275.510528] [<c022d93c>] (cpuidle_idle_call+0xa4/0x180) from [<c00324dc>] (cpu_idle+0x48/0x98) [ 275.519195] [<c00324dc>] (cpu_idle+0x48/0x98) from [<c0008934>] (start_kernel+0x268/0x2c8) [ 275.527526] [<c0008934>] (start_kernel+0x268/0x2c8) from [<80008034>] (0x80008034) [ 275.535156] Code: c03a8a50 e92d4013 e5903004 e1a04000 (e593c000) [ 275.541381] ---[ end trace f41fd6e0efe3feba ]--- [ 275.546020] Kernel panic - not syncing: Fatal exception in interrupt -- 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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