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 fee0ffc0 when write [fee0ffc0] *pgd=80000080007003, *pmd=00000000 Internal error: Oops: a06 [#1] SMP ARM Modules linked in: CPU: 0 UID: 0 PID: 5984 Comm: syz.3.350 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:243 [inline] PC is at parport_attach+0x5c/0x1e8 drivers/comedi/drivers/comedi_parport.c:231 LR is at parport_attach drivers/comedi/drivers/comedi_parport.c:243 [inline] LR is at parport_attach+0x50/0x1e8 drivers/comedi/drivers/comedi_parport.c:231 pc : [<81496b58>] lr : [<81496b4c>] psr: 60000013 sp : dfb8dd30 ip : dfb8dd30 fp : dfb8dd54 r10: 82d30eb4 r9 : 00000003 r8 : 83996b40 r7 : dfb8dd90 r6 : dfb8dd90 r5 : 83996b40 r4 : 00000000 r3 : fee0ffc0 r2 : 00000000 r1 : 00000000 r0 : 00000000 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 86bc2140 DAC: fffffffd Register r0 information: NULL pointer Register r1 information: NULL pointer Register r2 information: NULL pointer 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: slab kmalloc-192 start 83996b40 pointer offset 0 size 192 Register r6 information: 2-page vmalloc region starting at 0xdfb8c000 allocated at kernel_clone+0xc4/0x43c kernel/fork.c:2748 Register r7 information: 2-page vmalloc region starting at 0xdfb8c000 allocated at kernel_clone+0xc4/0x43c kernel/fork.c:2748 Register r8 information: slab kmalloc-192 start 83996b40 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 0xdfb8c000 allocated at kernel_clone+0xc4/0x43c kernel/fork.c:2748 Register r12 information: 2-page vmalloc region starting at 0xdfb8c000 allocated at kernel_clone+0xc4/0x43c kernel/fork.c:2748 Process syz.3.350 (pid: 5984, stack limit = 0xdfb8c000) Stack: (0xdfb8dd30 to 0xdfb8e000) dd20: ffffffff 00000004 82bd8ea4 81e2e4c8 dd40: 00000000 dfb8dd90 dfb8dd8c dfb8dd58 814927e8 81496b08 40946400 00000000 dd60: dfb8dd7c 20000240 83996b40 b5403587 40946400 00000003 00000004 83800c40 dd80: dfb8de4c dfb8dd90 8148dfec 814926ec 656d6f63 705f6964 6f707261 00007472 dda0: 00000000 0000ffc0 0000000f 00000007 00000001 00000005 00000100 00000003 ddc0: 20000000 00000008 0000000b 00000000 00000007 00000001 00000401 00010001 dde0: 00000001 00000000 00000004 00000fe9 00000001 00000007 00000002 00000007 de00: 00000009 00000048 00000a97 00000007 00006a77 00000005 00000007 00000005 de20: 00000000 4104128c 00000000 8467d480 83996b40 20000240 40946400 00000003 de40: dfb8df14 dfb8de50 8148f314 8148df2c 00000000 4104128c 84253c00 00000000 de60: 8254a844 dfb8dea4 0000005f 84253c00 00000064 83996b70 dfb8dee4 dfb8de88 de80: 80807cb4 807fe36c 00000064 00000001 00000000 dfb8dea4 85bbf510 834e4440 dea0: 00006400 0000000b dfb8de98 00000000 00000000 4104128c 00000000 8467d480 dec0: 40946400 20000240 20000240 8467d480 00000004 83800c40 dfb8def4 dfb8dee8 dee0: 80807de8 4104128c dfb8df14 00000000 8467d481 40946400 20000240 8467d480 df00: 00000004 83800c40 dfb8dfa4 dfb8df18 805bc564 8148efcc ecac8b10 83800c40 df20: dfb8df3c dfb8df30 81b5e3e0 81b5e2ac dfb8df54 dfb8df40 8025b7a8 8028f490 df40: dfb8dfb0 40000000 dfb8df84 dfb8df58 80221bdc 8025b764 00000000 82a1eb0c df60: dfb8dfb0 0013eb70 ecac8b10 80221b30 00000000 4104128c dfb8dfac 00000000 df80: 00000000 00356310 00000036 8020029c 83800c40 00000036 00000000 dfb8dfa8 dfa0: 80200060 805bc32c 00000000 00000000 00000004 40946400 20000240 00000000 dfc0: 00000000 00000000 00356310 00000036 003562d8 00000000 00000001 76f630dc dfe0: 76f62e88 76f62e78 00018fa0 001309d0 60000010 00000004 00000000 00000000 Call trace: [<81496afc>] (parport_attach) from [<814927e8>] (comedi_device_attach+0x108/0x244 drivers/comedi/drivers.c:1101) r7:dfb8dd90 r6:00000000 r5:81e2e4c8 r4:82bd8ea4 [<814926e0>] (comedi_device_attach) from [<8148dfec>] (do_devconfig_ioctl+0xcc/0x218 drivers/comedi/comedi_fops.c:930) r10:83800c40 r9:00000004 r8:00000003 r7:40946400 r6:b5403587 r5:83996b40 r4:20000240 [<8148df20>] (do_devconfig_ioctl) from [<8148f314>] (comedi_unlocked_ioctl+0x354/0x1db8 drivers/comedi/comedi_fops.c:2302) r8:00000003 r7:40946400 r6:20000240 r5:83996b40 r4:8467d480 [<8148efc0>] (comedi_unlocked_ioctl) from [<805bc564>] (vfs_ioctl fs/ioctl.c:51 [inline]) [<8148efc0>] (comedi_unlocked_ioctl) from [<805bc564>] (do_vfs_ioctl fs/ioctl.c:551 [inline]) [<8148efc0>] (comedi_unlocked_ioctl) from [<805bc564>] (__do_sys_ioctl fs/ioctl.c:595 [inline]) [<8148efc0>] (comedi_unlocked_ioctl) from [<805bc564>] (sys_ioctl+0x244/0xb5c fs/ioctl.c:583) r10:83800c40 r9:00000004 r8:8467d480 r7:20000240 r6:40946400 r5:8467d481 r4:00000000 [<805bc320>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67) Exception stack(0xdfb8dfa8 to 0xdfb8dff0) dfa0: 00000000 00000000 00000004 40946400 20000240 00000000 dfc0: 00000000 00000000 00356310 00000036 003562d8 00000000 00000001 76f630dc dfe0: 76f62e88 76f62e78 00018fa0 001309d0 r10:00000036 r9:83800c40 r8:8020029c r7:00000036 r6:00356310 r5:00000000 r4:00000000 Code: ebb67c32 e5953064 e7f33053 e2433612 (e5c34000) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: ebb67c32 bl 0xfed9f0d0 4: e5953064 ldr r3, [r5, #100] @ 0x64 8: e7f33053 ubfx r3, r3, #0, #20 c: e2433612 sub r3, r3, #18874368 @ 0x1200000 * 10: e5c34000 strb r4, [r3] <-- trapping instruction