genirq: Flags mismatch irq 31. 00200001 (comedi_parport) vs. 00200081 (virtio0) 8<--- cut here --- Unable to handle kernel paging request at virtual address fee04f27 when write [fee04f27] *pgd=80000080007003, *pmd=00000000 Internal error: Oops: a06 [#1] SMP ARM Modules linked in: CPU: 0 UID: 0 PID: 10773 Comm: syz.3.8810 Not tainted 6.17.0-rc1-syzkaller #0 PREEMPT Hardware name: ARM-Versatile Express PC is at __raw_writeb arch/arm/include/asm/io.h:88 [inline] PC is at parport_attach drivers/comedi/drivers/comedi_parport.c:289 [inline] PC is at parport_attach+0x174/0x1d0 drivers/comedi/drivers/comedi_parport.c:224 LR is at parport_attach drivers/comedi/drivers/comedi_parport.c:289 [inline] LR is at parport_attach+0x164/0x1d0 drivers/comedi/drivers/comedi_parport.c:224 pc : [<813ab460>] lr : [<813ab450>] psr: 60000013 sp : dfa61d30 ip : dfa61d30 fp : dfa61d54 r10: 82b16f00 r9 : 00000003 r8 : 8418e540 r7 : dfa61d90 r6 : 8418e540 r5 : 00000000 r4 : 00000000 r3 : fee04f27 r2 : 81e15464 r1 : 00000001 r0 : 813ab0d0 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 85d25200 DAC: fffffffd 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:1055 Register r4 information: NULL pointer Register r5 information: NULL pointer Register r6 information: slab kmalloc-192 start 8418e540 pointer offset 0 size 192 Register r7 information: 2-page vmalloc region starting at 0xdfa60000 allocated at kernel_clone+0xac/0x3ec kernel/fork.c:2605 Register r8 information: slab kmalloc-192 start 8418e540 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 0xdfa60000 allocated at kernel_clone+0xac/0x3ec kernel/fork.c:2605 Register r12 information: 2-page vmalloc region starting at 0xdfa60000 allocated at kernel_clone+0xac/0x3ec kernel/fork.c:2605 Process syz.3.8810 (pid: 10773, stack limit = 0xdfa60000) Stack: (0xdfa61d30 to 0xdfa62000) 1d20: 823fe3b8 8418e540 829cf92c 829cf92c 1d40: 81e15924 8418e584 dfa61d8c dfa61d58 813a74f8 813ab2f8 200000c0 00000000 1d60: dfa61d7c 200000c0 8418e540 b5403587 200000c0 855da400 40946400 00000003 1d80: dfa61e4c dfa61d90 813a3078 813a73fc 656d6f63 705f6964 6f707261 00007472 1da0: 00000000 00004f27 0000001f 00000002 00000401 00000001 00000cc7 00000fff 1dc0: 5c95239c 00000005 000003ff 00000802 00001600 00000001 00000001 00000009 1de0: 0000e1cb 00000006 00000004 00000003 00000395 80000089 fffffffe 0000000b 1e00: fffffff5 ffffeadb 00000003 0000003c 00000008 00000004 08000000 dffffffa 1e20: 00000000 d5b74ca2 00000000 85cd0c00 8418e540 200000c0 200000c0 855da400 1e40: dfa61f14 dfa61e50 813a4044 813a2f84 00000000 dfa61e54 dfa61e54 d5b74ca2 1e60: 00000000 00000000 8247054c 0000005f 840a6458 8418e570 841a387c 855da400 1e80: dfa61ee4 dfa61e90 807977b4 8078db18 00000064 00000001 00000000 dfa61eac 1ea0: 85faf490 8342a550 00006400 0000000b dfa61ea0 00000000 dfa61d30 d5b74ca2 1ec0: 85cd0c00 40946400 200000c0 200000c0 85cd0c00 00000003 dfa61ef4 dfa61ee8 1ee0: 807978d4 d5b74ca2 dfa61f14 40946400 00000000 85cd0c01 200000c0 85cd0c00 1f00: 00000003 855da400 dfa61fa4 dfa61f18 8056cd88 813a3a74 ecac8b10 855da400 1f20: dfa61f3c dfa61f30 81a392b8 81a39188 dfa61f54 dfa61f40 8025e490 8028ef8c 1f40: dfa61fb0 40000000 dfa61f84 dfa61f58 802229ec 8025e44c 00000000 8281cddc 1f60: dfa61fb0 0014c820 ecac8b10 80222940 00000000 d5b74ca2 dfa61fac 00000000 1f80: 00000000 002f6308 00000036 8020029c 855da400 00000036 00000000 dfa61fa8 1fa0: 80200060 8056cc64 00000000 00000000 00000003 40946400 200000c0 00000000 1fc0: 00000000 00000000 002f6308 00000036 002e0000 00000000 00006364 76faa0bc 1fe0: 76fa9ec0 76fa9eb0 0001948c 001322c0 60000010 00000003 00000000 00000000 Call trace: [<813ab2ec>] (parport_attach) from [<813a74f8>] (comedi_device_attach+0x108/0x250 drivers/comedi/drivers.c:1006) r6:8418e584 r5:81e15924 r4:829cf92c [<813a73f0>] (comedi_device_attach) from [<813a3078>] (do_devconfig_ioctl+0x100/0x220 drivers/comedi/comedi_fops.c:872) r10:00000003 r9:40946400 r8:855da400 r7:200000c0 r6:b5403587 r5:8418e540 r4:200000c0 [<813a2f78>] (do_devconfig_ioctl) from [<813a4044>] (comedi_unlocked_ioctl+0x5dc/0x1c24 drivers/comedi/comedi_fops.c:2173) r8:855da400 r7:200000c0 r6:200000c0 r5:8418e540 r4:85cd0c00 [<813a3a68>] (comedi_unlocked_ioctl) from [<8056cd88>] (vfs_ioctl fs/ioctl.c:51 [inline]) [<813a3a68>] (comedi_unlocked_ioctl) from [<8056cd88>] (do_vfs_ioctl fs/ioctl.c:552 [inline]) [<813a3a68>] (comedi_unlocked_ioctl) from [<8056cd88>] (__do_sys_ioctl fs/ioctl.c:596 [inline]) [<813a3a68>] (comedi_unlocked_ioctl) from [<8056cd88>] (sys_ioctl+0x130/0xba0 fs/ioctl.c:584) r10:855da400 r9:00000003 r8:85cd0c00 r7:200000c0 r6:85cd0c01 r5:00000000 r4:40946400 [<8056cc58>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67) Exception stack(0xdfa61fa8 to 0xdfa61ff0) 1fa0: 00000000 00000000 00000003 40946400 200000c0 00000000 1fc0: 00000000 00000000 002f6308 00000036 002e0000 00000000 00006364 76faa0bc 1fe0: 76fa9ec0 76fa9eb0 0001948c 001322c0 r10:00000036 r9:855da400 r8:8020029c r7:00000036 r6:002f6308 r5:00000000 r4:00000000 Code: e596306c e3a04000 e7f33053 e2433612 (e5c34000) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: e596306c ldr r3, [r6, #108] @ 0x6c 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