On Sun, Apr 08, 2012 at 04:12:23PM +0200, Christoph Fritz wrote: > > How about works as mass storage? > > After some read while write testing I get the trace below. Is this reproducible? If you run your test several times, does it always crash at the same address? If no, follow your broken-hardware theory. Another possibility could be an error in DMA handling, which can also lead to more or less random memory corruption. If yes, compile your kernel with debug symbols and use addr2line to find the exact line in the code where the error occurs. Then find out where that NULL pointer comes from, and fix the bug. Thanks, Hans > > Unable to handle kernel NULL pointer dereference at virtual address 0000002c > pgd = c0004000 > [0000002c] *pgd=00000000 > Internal error: Oops: 17 [#1] ARM > Modules linked in: g_mass_storage fsl_usb2_udc > CPU: 0 Not tainted (3.4.0-rc1-00352-ga250237 #181) > PC is at nfs_clear_request_commit+0x8/0x9c > LR is at nfs_updatepage+0x190/0x458 > pc : [<c01014d0>] lr : [<c0102c8c>] psr: 60000013 > sp : c797dc50 ip : 000006a1 fp : 00001000 > r10: c7a951a0 r9 : 00000000 r8 : 00000000 > r7 : 00001000 r6 : c74ce5b0 r5 : 00000000 r4 : 00000000 > r3 : 00000067 r2 : 0000006a r1 : c63a6220 r0 : 00000000 > Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel > Control: 00c5387d Table: 87964008 DAC: 00000017 > Process file-storage (pid: 712, stack limit = 0xc797c268) > Stack: (0xc797dc50 to 0xc797e000) > dc40: c051c620 00000000 c74ce5b0 c0102c8c > dc60: c7a419c0 c051c620 00000000 c051c620 00001000 c7a419c0 00000000 00000000 > dc80: c02e7b80 00000000 00001000 c00f6c38 00001000 c797c000 c74ce668 00002200 > dca0: 00000000 c02e7b80 00000000 c004f508 00001000 00001000 c051c620 c03fb03c > dcc0: 0001d000 00000000 c74ce5b0 c7a419c0 00001000 00000001 c797de98 00000001 > dce0: 00002200 00001e00 c03fb03c c051c620 c03fa5dc c74ce5b0 c7a419c0 0001ae00 > dd00: 00000000 00000000 c797de50 00004000 c797de98 c0050c80 0001ae00 00000000 > dd20: c797de50 00004000 00000000 c04221e0 c04221a0 00000000 00004000 c04221b4 > dd40: c797de18 c74ce668 00100100 c0260140 c7919800 00000001 00001c00 ffdff0a8 > dd60: c7919800 c01d67cc c797dd68 00004000 c04221a8 00000000 0001ae00 c7a419c0 > dd80: c74ce60c c797de18 c797de98 00000001 00000001 c0050d38 c797c000 00000001 > dda0: 91827364 c797dda4 c797dda4 c797ddac c797ddac 00000000 c797de3c c74ce5b0 > ddc0: 00004000 c797de18 c797de98 0001ae00 00000000 0001ae00 00000001 c00f6844 > dde0: 0001ae00 00000000 00000001 c797de18 c797df20 c7a419c0 c797de98 fffffdee > de00: 00000000 0001ae00 00000000 c0079440 0001ae00 00000000 c8804000 c04225a8 > de20: 00000000 00000001 ffffffff c7a419c0 00000000 00000000 00000000 00000000 > de40: c7a0c820 c7a0c820 00000000 00000000 0001ae00 00000000 00000000 00000000 > de60: 00004000 00000000 00004000 c0035048 c608e01c c7a0c820 00000017 c797c000 > de80: 00000000 c791c580 c7954de0 c00350ec c7a0c820 c0400758 c7adc000 00004000 > dea0: 00004000 c7a419c0 c7adc000 c797df20 0001ae00 04000000 00000000 c0079e64 > dec0: c7a419c0 c7adc000 c796f880 bf00e510 c7a95180 00004000 0001ae00 bf00a634 > dee0: 000001be 00000000 c797c000 c7adc000 00000000 c797c000 c797df14 00000200 > df00: 00021600 00000000 00000000 00006800 04000000 00000000 3636323d c796f8b0 > df20: 0001ae00 00000000 c797c000 bf00e510 00000000 bf00e510 c7a95180 00000000 > df40: c797c000 c7adc000 bf00e557 bf00d068 bf00ddbc bf00dd9c 00000000 00000000 > df60: 00000002 00000000 00000000 bf00e558 bf00e528 c7a0c820 bf00e552 bf00e555 > df80: bf00e554 bf00e553 bf00e559 bf00e556 c7a0c820 bf00e5b4 c797dfc4 c02d9c2c > dfa0: 00000000 c7983e20 bf00e510 c797dfd4 bf00bf98 00000000 00000000 00000000 > dfc0: 00000000 c0030b88 c000e280 00000000 bf00e510 00000000 c797dfd8 c797dfd8 > dfe0: 00000000 c7983e20 c0030b04 c000e280 00000013 c000e280 1a4b1d04 890e0000 > [<c01014d0>] (nfs_clear_request_commit+0x8/0x9c) from [<c0102c8c>] (nfs_updatepage+0x190/0x458) > [<c0102c8c>] (nfs_updatepage+0x190/0x458) from [<c00f6c38>] (nfs_write_end+0x22c/0x258) > [<c00f6c38>] (nfs_write_end+0x22c/0x258) from [<c004f508>] (generic_file_buffered_write+0x170/0x270) > [<c004f508>] (generic_file_buffered_write+0x170/0x270) from [<c0050c80>] (__generic_file_aio_write+0x3ec/0x434) > [<c0050c80>] (__generic_file_aio_write+0x3ec/0x434) from [<c0050d38>] (generic_file_aio_write+0x70/0xd8) > [<c0050d38>] (generic_file_aio_write+0x70/0xd8) from [<c00f6844>] (nfs_file_write+0xb4/0x160) > [<c00f6844>] (nfs_file_write+0xb4/0x160) from [<c0079440>] (do_sync_write+0xa0/0xe8) > [<c0079440>] (do_sync_write+0xa0/0xe8) from [<c0079e64>] (vfs_write+0xac/0x134) > [<c0079e64>] (vfs_write+0xac/0x134) from [<bf00a634>] (do_write+0x324/0x420 [g_mass_storage]) > [<bf00a634>] (do_write+0x324/0x420 [g_mass_storage]) from [<bf00d068>] (fsg_main_thread+0x10d0/0x1580 [g_mass_storage]) > [<bf00d068>] (fsg_main_thread+0x10d0/0x1580 [g_mass_storage]) from [<c0030b88>] (kthread+0x84/0x90) > [<c0030b88>] (kthread+0x84/0x90) from [<c000e280>] (kernel_thread_exit+0x0/0x8) > Code: e5023050 e12fff1e e92d4070 e1a04000 (e590302c) > ---[ end trace db4d02d5dfc43370 ]--- -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
