FYI, we noticed the below changes on git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master commit 23c405912b881e3ca516554efde852c2ad550b31 ("parport: fix memory leak") +------------------------------------------------+------------+------------+ | | cabea69587 | 23c405912b | +------------------------------------------------+------------+------------+ | boot_successes | 94 | 0 | | boot_failures | 12 | 35 | | page_allocation_failure:order:#,mode | 1 | | | warn_alloc_failed+0x | 1 | | | Mem-Info | 2 | | | invoked_oom-killer:gfp_mask=0x | 2 | | | Out_of_memory:Kill_process | 2 | | | backtrace:ring_buffer_consumer_thread | 1 | | | backtrace:vfs_writev | 1 | | | backtrace:SyS_writev | 1 | | | backtrace:vfs_read | 2 | | | backtrace:SyS_read | 2 | | | backtrace:SYSC_socketcall | 1 | | | backtrace:SyS_socketcall | 1 | | | IP-Config:Auto-configuration_of_network_failed | 10 | | | BUG:unable_to_handle_kernel | 0 | 33 | | Oops | 0 | 33 | | EIP_is_at__kmalloc_track_caller | 0 | 33 | | Kernel_panic-not_syncing:Fatal_exception | 0 | 34 | | backtrace:platform_device_register_full | 0 | 33 | | backtrace:gs_fpgaboot_init | 0 | 33 | | backtrace:kernel_init_freeable | 0 | 33 | | kernel_BUG_at_mm/vmalloc.c | 0 | 1 | | invalid_opcode | 0 | 1 | | EIP_is_at__vunmap | 0 | 1 | | backtrace:do_group_exit | 0 | 1 | | backtrace:SyS_exit_group | 0 | 1 | | BUG:kernel_boot_crashed | 0 | 1 | +------------------------------------------------+------------+------------+ [ 7.142998] FPGA DOWNLOAD ---> [ 7.143510] FPGA image file name: xlinx_fpga_firmware.bit [ 7.143510] FPGA image file name: xlinx_fpga_firmware.bit [ 7.144431] BUG: unable to handle kernel [ 7.144431] BUG: unable to handle kernel paging requestpaging request at 61677066 at 61677066 [ 7.145505] IP: [ 7.145505] IP: [<90972310>] __kmalloc_track_caller+0x136/0x248 [<90972310>] __kmalloc_track_caller+0x136/0x248 [ 7.146498] *pdpt = 0000000000000000 [ 7.146498] *pdpt = 0000000000000000 *pde = 0000000000000000 *pde = 0000000000000000 [ 7.147478] Oops: 0000 [#1] [ 7.147478] Oops: 0000 [#1] SMP SMP [ 7.148051] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.2.0-rc3-00002-g23c4059 #2 [ 7.148051] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.2.0-rc3-00002-g23c4059 #2 [ 7.149280] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014 [ 7.149280] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014 [ 7.150971] task: 94628000 ti: 945d6000 task.ti: 945d6000 [ 7.150971] task: 94628000 ti: 945d6000 task.ti: 945d6000 [ 7.151874] EIP: 0060:[<90972310>] EFLAGS: 00010246 CPU: 0 [ 7.151874] EIP: 0060:[<90972310>] EFLAGS: 00010246 CPU: 0 [ 7.152819] EIP is at __kmalloc_track_caller+0x136/0x248 [ 7.152819] EIP is at __kmalloc_track_caller+0x136/0x248 [ 7.153720] EAX: 00000000 EBX: 00000000 ECX: 61677066 EDX: 0532cd52 [ 7.153720] EAX: 00000000 EBX: 00000000 ECX: 61677066 EDX: 0532cd52 [ 7.154756] ESI: 94401e80 EDI: 00000000 EBP: 945d7d78 ESP: 945d7d4c [ 7.154756] ESI: 94401e80 EDI: 00000000 EBP: 945d7d78 ESP: 945d7d4c [ 7.155830] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 [ 7.155830] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 [ 7.156762] CR0: 80050033 CR2: 61677066 CR3: 1190c000 CR4: 000406b0 [ 7.156762] CR0: 80050033 CR2: 61677066 CR3: 1190c000 CR4: 000406b0 [ 7.157832] Stack: [ 7.157832] Stack: [ 7.158172] 90946d3a [ 7.158172] 90946d3a 00628520 00628520 000013b1 000013b1 945d7d00 945d7d00 94401e80 94401e80 00000009 00000009 000000d0 000000d0 61677066 61677066 [ 7.159598] 00000009 [ 7.159598] 00000009 8e5d1440 8e5d1440 000000d0 000000d0 945d7d8c 945d7d8c 90946cdc 90946cdc 00000b19 00000b19 945d1d80 945d1d80 945bf0c0 945bf0c0 [ 7.160978] 945d7d98 [ 7.160978] 945d7d98 90946d3a 90946d3a 0000a1ff 0000a1ff 945d7db0 945d7db0 909d8d5a 909d8d5a 0000a1ff 0000a1ff 0000a1ff 0000a1ff 945d1d80 945d1d80 [ 7.162361] Call Trace: [ 7.162361] Call Trace: [ 7.162782] [<90946d3a>] ? kstrdup_const+0x34/0x37 [ 7.162782] [<90946d3a>] ? kstrdup_const+0x34/0x37 [ 7.163629] [<90946cdc>] kstrdup+0x3e/0x68 [ 7.163629] [<90946cdc>] kstrdup+0x3e/0x68 [ 7.164316] [<90946d3a>] kstrdup_const+0x34/0x37 [ 7.164316] [<90946d3a>] kstrdup_const+0x34/0x37 [ 7.165105] [<909d8d5a>] __kernfs_new_node+0x1d/0xe2 [ 7.165105] [<909d8d5a>] __kernfs_new_node+0x1d/0xe2 [ 7.165997] [<909da053>] kernfs_new_node+0x25/0x56 [ 7.165997] [<909da053>] kernfs_new_node+0x25/0x56 [ 7.166835] [<909dc1b7>] kernfs_create_link+0x1b/0xa6 [ 7.166835] [<909dc1b7>] kernfs_create_link+0x1b/0xa6 [ 7.167739] [<909dd404>] sysfs_do_create_link_sd+0xb3/0x125 [ 7.167739] [<909dd404>] sysfs_do_create_link_sd+0xb3/0x125 [ 7.168820] [<909dd4d9>] sysfs_do_create_link+0x63/0x6c [ 7.168820] [<909dd4d9>] sysfs_do_create_link+0x63/0x6c [ 7.169705] [<909dd505>] sysfs_create_link+0xf/0x11 [ 7.169705] [<909dd505>] sysfs_create_link+0xf/0x11 [ 7.170530] [<90b946a8>] bus_add_device+0x129/0x1d7 [ 7.170530] [<90b946a8>] bus_add_device+0x129/0x1d7 [ 7.171358] [<90b9213d>] device_add+0x507/0x7fb [ 7.171358] [<90b9213d>] device_add+0x507/0x7fb [ 7.172162] [<90b91b62>] ? dev_set_name+0x19/0x1b [ 7.172162] [<90b91b62>] ? dev_set_name+0x19/0x1b [ 7.172960] [<90b97c4a>] platform_device_add+0x202/0x29a [ 7.172960] [<90b97c4a>] platform_device_add+0x202/0x29a [ 7.173886] [<90b97f31>] platform_device_register_full+0x117/0x167 [ 7.173886] [<90b97f31>] platform_device_register_full+0x117/0x167 [ 7.174943] [<917561b1>] gs_fpgaboot_init+0x45/0x541 [ 7.174943] [<917561b1>] gs_fpgaboot_init+0x45/0x541 [ 7.175858] [<9096ef54>] ? slab_free_hook+0x58/0x64 [ 7.175858] [<9096ef54>] ? slab_free_hook+0x58/0x64 [ 7.176818] [<90971221>] ? kfree+0x2d4/0x305 [ 7.176818] [<90971221>] ? kfree+0x2d4/0x305 [ 7.177543] [<91704f41>] do_one_initcall+0x132/0x21b [ 7.177543] [<91704f41>] do_one_initcall+0x132/0x21b [ 7.178401] [<9175616c>] ? synaptics_rmi4_driver_init+0x11/0x11 [ 7.178401] [<9175616c>] ? synaptics_rmi4_driver_init+0x11/0x11 [ 7.179399] [<90860f7b>] ? parse_args+0x347/0x40e [ 7.179399] [<90860f7b>] ? parse_args+0x347/0x40e [ 7.180193] [<917051dc>] ? kernel_init_freeable+0x1b2/0x28f [ 7.180193] [<917051dc>] ? kernel_init_freeable+0x1b2/0x28f [ 7.181130] [<917051fc>] kernel_init_freeable+0x1d2/0x28f [ 7.181130] [<917051fc>] kernel_init_freeable+0x1d2/0x28f [ 7.182082] [<90f1b74b>] kernel_init+0xe/0x139 [ 7.182082] [<90f1b74b>] kernel_init+0xe/0x139 [ 7.182867] [<90f2c901>] ret_from_kernel_thread+0x21/0x30 [ 7.182867] [<90f2c901>] ret_from_kernel_thread+0x21/0x30 [ 7.183802] [<90f1b73d>] ? rest_init+0x139/0x139 [ 7.183802] [<90f1b73d>] ? rest_init+0x139/0x139 [ 7.184581] Code: [ 7.184581] Code: 8b 8b 55 55 ec ec 89 89 d9 d9 89 89 f0 f0 e8 e8 99 99 d1 d1 ff ff ff ff 89 89 45 45 f0 f0 8b 8b 06 06 64 64 ff ff 40 40 14 14 e9 e9 ad ad 00 00 00 00 00 00 f6 f6 06 06 07 07 8b 8b 4d 4d f0 f0 8b 8b 46 46 14 14 0f 0f 95 95 45 45 db db 0f 0f b6 b6 5d 5d db db <8b> <8b> 04 04 01 01 31 31 c9 c9 89 89 45 45 e0 e0 89 89 da da b8 b8 cc cc 74 74 4f 4f 91 91 e8 e8 d5 d5 5e 5e f8 f8 ff ff 8b 8b [ 7.188621] EIP: [<90972310>] [ 7.188621] EIP: [<90972310>] __kmalloc_track_caller+0x136/0x248__kmalloc_track_caller+0x136/0x248 SS:ESP 0068:945d7d4c SS:ESP 0068:945d7d4c [ 7.190038] CR2: 0000000061677066 [ 7.190038] CR2: 0000000061677066 [ 7.190636] ---[ end trace 438723f18d88dcd8 ]--- [ 7.190636] ---[ end trace 438723f18d88dcd8 ]--- Thanks, Ying Huang