UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16 8<--- cut here --- Unable to handle kernel paging request at virtual address fee00300 when write [fee00300] *pgd=80000080007003 , *pmd=00000000 Internal error: Oops: a06 [#1] SMP ARM Modules linked in: CPU: 1 UID: 0 PID: 22773 Comm: syz.8.3142 Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: ARM-Versatile Express PC is at __raw_writeb arch/arm/include/asm/io.h:99 [inline] PC is at parport_attach drivers/comedi/drivers/comedi_parport.c:291 [inline] PC is at parport_attach+0x184/0x1e0 drivers/comedi/drivers/comedi_parport.c:224 LR is at parport_attach drivers/comedi/drivers/comedi_parport.c:291 [inline] LR is at parport_attach+0x174/0x1e0 drivers/comedi/drivers/comedi_parport.c:224 pc : [<8147bc74>] lr : [<8147bc64>] psr: 60000013 sp : dfdd9d30 ip : dfdd9d30 fp : dfdd9d54 r10: 82d2c9b4 r9 : 00000003 r8 : 846ac600 r7 : dfdd9d90 r6 : 846ac600 r5 : 00000000 r4 : 00000000 r3 : fee00300 r2 : 81e2d3a8 r1 : 00000001 r0 : 8147b8d4 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none Control: 30c5387d Table: 8602c880 DAC: 00000000 Register r0 information: non-slab/vmalloc memory Register r1 information: non-paged memory Register r2 information: non-slab/vmalloc memory Register r3 information: 0-page vmalloc region starting at 0xfee00000 allocated at pci_reserve_io+0x0/0x38 arch/arm/mm/mmu.c:1048 Register r4 information: NULL pointer Register r5 information: NULL pointer Register r6 information: slab kmalloc-192 start 846ac600 pointer offset 0 size 192 Register r7 information: 2-page vmalloc region starting at 0xdfdd8000 allocated at kernel_clone+0xc4/0x43c kernel/fork.c:2746 Register r8 information: slab kmalloc-192 start 846ac600 pointer offset 0 size 192 Register r9 information: non-paged memory Register r10 information: non-slab/vmalloc memory Register r11 information: 2-page vmalloc region starting at 0xdfdd8000 allocated at kernel_clone+0xc4/0x43c kernel/fork.c:2746 Register r12 information: 2-page vmalloc region starting at 0xdfdd8000 allocated at kernel_clone+0xc4/0x43c kernel/fork.c:2746 Process syz.8.3142 (pid: 22773, stack limit = 0xdfdd8000) Stack: (0xdfdd9d30 to 0xdfdda000) 9d20: 824cbc74 846ac600 82bd64c4 82bd64c4 9d40: 81e2d868 00000000 dfdd9d8c dfdd9d58 814777f0 8147bafc 40946400 00000000 9d60: dfdd9d7c 20000440 846ac600 b5403587 40946400 00000001 00000003 8484b100 9d80: dfdd9e4c dfdd9d90 81472ffc 814776f4 656d6f63 705f6964 6f707261 00007472 9da0: 00000000 00000300 80000000 00000005 00000400 00000007 00800005 00001007 9dc0: 00000008 00000006 00000005 00000dfe 00000009 00000001 fffffffc 0010000b 9de0: 00000003 00000005 0004007a 00000003 00000003 00000089 00000012 0000007f 9e00: 00000002 00000001 00000e66 00000001 00000006 0000a6b7 00000004 00000005 9e20: 00000000 508cfafe 00000000 85212c80 846ac600 20000440 40946400 00000001 9e40: dfdd9f14 dfdd9e50 81474320 81472f34 00000000 508cfafe 00000000 00000000 9e60: 8254080c dfdd9ea4 0000005f 84154058 00000064 846ac630 dfdd9ee4 dfdd9e88 9e80: 80802f88 807f92b8 00000064 00000001 00000000 dfdd9ea4 85f46810 834e72a8 9ea0: 00006400 0000000b dfdd9e98 00000000 00000000 508cfafe dfdd9f6c 85212c80 9ec0: 40946400 20000440 20000440 85212c80 00000003 8484b100 dfdd9ef4 dfdd9ee8 9ee0: 808030bc 508cfafe dfdd9f14 00000000 85212c80 40946400 20000440 85212c80 9f00: 00000003 8484b100 dfdd9fa4 dfdd9f18 805b9fc0 81473fd8 20000440 00000000 9f20: 00000000 00000000 00000000 00000000 00000000 00000000 8025a7f0 508cfafe 9f40: dfdd9fb0 8484b100 dfdd9fb0 00346310 00000036 8020029c 8484b100 00800000 9f60: dfdd9f7c dfdd9f70 80393710 80391888 dfdd9fa4 508cfafe 8022912c 00000000 9f80: 00000000 00346310 00000036 8020029c 8484b100 00000036 00000000 dfdd9fa8 9fa0: 8020028c 805b9d88 00000000 00000000 00000003 40946400 20000440 00000000 9fc0: 00000000 00000000 00346310 00000036 003462d8 00000000 00000001 76f670dc 9fe0: 76f66e88 76f66e78 00018ebc 00130820 60000010 00000003 00000000 00000000 Call trace: [<8147baf0>] (parport_attach) from [<814777f0>] (comedi_device_attach+0x108/0x244 drivers/comedi/drivers.c:1101) r6:00000000 r5:81e2d868 r4:82bd64c4 [<814776e8>] (comedi_device_attach) from [<81472ffc>] (do_devconfig_ioctl+0xd4/0x21c drivers/comedi/comedi_fops.c:930) r10:8484b100 r9:00000003 r8:00000001 r7:40946400 r6:b5403587 r5:846ac600 r4:20000440 [<81472f28>] (do_devconfig_ioctl) from [<81474320>] (comedi_unlocked_ioctl+0x354/0x1db8 drivers/comedi/comedi_fops.c:2302) r8:00000001 r7:40946400 r6:20000440 r5:846ac600 r4:85212c80 [<81473fcc>] (comedi_unlocked_ioctl) from [<805b9fc0>] (vfs_ioctl fs/ioctl.c:51 [inline]) [<81473fcc>] (comedi_unlocked_ioctl) from [<805b9fc0>] (do_vfs_ioctl fs/ioctl.c:551 [inline]) [<81473fcc>] (comedi_unlocked_ioctl) from [<805b9fc0>] (__do_sys_ioctl fs/ioctl.c:595 [inline]) [<81473fcc>] (comedi_unlocked_ioctl) from [<805b9fc0>] (sys_ioctl+0x244/0xb5c fs/ioctl.c:583) r10:8484b100 r9:00000003 r8:85212c80 r7:20000440 r6:40946400 r5:85212c80 r4:00000000 [<805b9d7c>] (sys_ioctl) from [<8020028c>] (__sys_trace_return+0x0/0x10) Exception stack(0xdfdd9fa8 to 0xdfdd9ff0) 9fa0: 00000000 00000000 00000003 40946400 20000440 00000000 9fc0: 00000000 00000000 00346310 00000036 003462d8 00000000 00000001 76f670dc 9fe0: 76f66e88 76f66e78 00018ebc 00130820 r10:00000036 r9:8484b100 r8:8020029c r7:00000036 r6:00346310 r5:00000000 r4:00000000 Code: e5963064 e3a04000 e7f33053 e2433612 (e5c34000) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: e5963064 ldr r3, [r6, #100] @ 0x64 4: e3a04000 mov r4, #0 8: e7f33053 ubfx r3, r3, #0, #20 c: e2433612 sub r3, r3, #18874368 @ 0x1200000 * 10: e5c34000 strb r4, [r3] <-- trapping instruction