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: 1 UID: 0 PID: 8702 Comm: syz.0.1327 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 : [<813ab008>] lr : [<813aaff8>] psr: 60000013 sp : dfa7dd30 ip : dfa7dd30 fp : dfa7dd54 r10: 82b16f00 r9 : 00000003 r8 : 84152d80 r7 : dfa7dd90 r6 : 84152d80 r5 : 00000000 r4 : 00000000 r3 : fee04f27 r2 : 81e15444 r1 : 00000001 r0 : 813aac78 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none Control: 30c5387d Table: 8566f940 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:1055 Register r4 information: NULL pointer Register r5 information: NULL pointer Register r6 information: slab kmalloc-192 start 84152d80 pointer offset 0 size 192 Register r7 information: 2-page vmalloc region starting at 0xdfa7c000 allocated at kernel_clone+0xac/0x3ec kernel/fork.c:2605 Register r8 information: slab kmalloc-192 start 84152d80 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 0xdfa7c000 allocated at kernel_clone+0xac/0x3ec kernel/fork.c:2605 Register r12 information: 2-page vmalloc region starting at 0xdfa7c000 allocated at kernel_clone+0xac/0x3ec kernel/fork.c:2605 Process syz.0.1327 (pid: 8702, stack limit = 0xdfa7c000) Stack: (0xdfa7dd30 to 0xdfa7e000) dd20: 823fe320 84152d80 829cf8ec 829cf8ec dd40: 81e15904 84152dc4 dfa7dd8c dfa7dd58 813a70a0 813aaea0 200000c0 00000000 dd60: dfa7dd7c 200000c0 84152d80 b5403587 200000c0 84e18c00 40946400 00000003 dd80: dfa7de4c dfa7dd90 813a2c20 813a6fa4 656d6f63 705f6964 6f707261 00007472 dda0: 00000000 00004f27 0000001f 00010000 00000004 00000003 00000cc7 00000004 ddc0: 00080008 0000000e 00000006 00000002 00000001 00000001 00000001 00000006 dde0: 10000105 00000000 0001a44d 00000003 3fff7fff 00000089 00000010 00000001 de00: 20001e58 0080000b 00000e69 0000003c 00000008 00000006 00000000 ffffffb8 de20: 00000000 6164fdc7 00000000 8595b300 84152d80 200000c0 200000c0 84e18c00 de40: dfa7df14 dfa7de50 813a3bec 813a2b2c 00000000 00000000 00000000 6164fdc7 de60: 00000000 00000000 8247054c 0000005f 83d3f858 84152db0 8416dd44 84e18c00 de80: dfa7dee4 dfa7de90 8079795c 8078dcc0 00000064 00000001 00000000 dfa7deac dea0: 853e4190 8342e110 00006400 0000000b dfa7dea0 00000000 00000000 6164fdc7 dec0: 8595b300 40946400 200000c0 200000c0 8595b300 00000003 dfa7def4 dfa7dee8 dee0: 80797a7c 6164fdc7 dfa7df14 40946400 00000000 8595b301 200000c0 8595b300 df00: 00000003 84e18c00 dfa7dfa4 dfa7df18 8056cf18 813a361c ecac8b10 84e18c00 df20: dfa7df3c dfa7df30 81a388b8 81a38788 dfa7df54 dfa7df40 8025e490 8028ef8c df40: dfa7dfb0 40000000 dfa7df84 dfa7df58 802229ec 8025e44c 00000000 8281cddc df60: dfa7dfb0 0014c820 ecac8b10 80222940 00000000 6164fdc7 dfa7dfac 00000000 df80: 00000000 002f6308 00000036 8020029c 84e18c00 00000036 00000000 dfa7dfa8 dfa0: 80200060 8056cdf4 00000000 00000000 00000003 40946400 200000c0 00000000 dfc0: 00000000 00000000 002f6308 00000036 002e0000 00000000 00006364 76ff50bc dfe0: 76ff4ec0 76ff4eb0 0001948c 001322c0 60000010 00000003 00000000 00000000 Call trace: [<813aae94>] (parport_attach) from [<813a70a0>] (comedi_device_attach+0x108/0x250 drivers/comedi/drivers.c:1006) r6:84152dc4 r5:81e15904 r4:829cf8ec [<813a6f98>] (comedi_device_attach) from [<813a2c20>] (do_devconfig_ioctl+0x100/0x220 drivers/comedi/comedi_fops.c:872) r10:00000003 r9:40946400 r8:84e18c00 r7:200000c0 r6:b5403587 r5:84152d80 r4:200000c0 [<813a2b20>] (do_devconfig_ioctl) from [<813a3bec>] (comedi_unlocked_ioctl+0x5dc/0x1c24 drivers/comedi/comedi_fops.c:2173) r8:84e18c00 r7:200000c0 r6:200000c0 r5:84152d80 r4:8595b300 [<813a3610>] (comedi_unlocked_ioctl) from [<8056cf18>] (vfs_ioctl fs/ioctl.c:51 [inline]) [<813a3610>] (comedi_unlocked_ioctl) from [<8056cf18>] (do_vfs_ioctl fs/ioctl.c:552 [inline]) [<813a3610>] (comedi_unlocked_ioctl) from [<8056cf18>] (__do_sys_ioctl fs/ioctl.c:596 [inline]) [<813a3610>] (comedi_unlocked_ioctl) from [<8056cf18>] (sys_ioctl+0x130/0xba0 fs/ioctl.c:584) r10:84e18c00 r9:00000003 r8:8595b300 r7:200000c0 r6:8595b301 r5:00000000 r4:40946400 [<8056cde8>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67) Exception stack(0xdfa7dfa8 to 0xdfa7dff0) dfa0: 00000000 00000000 00000003 40946400 200000c0 00000000 dfc0: 00000000 00000000 002f6308 00000036 002e0000 00000000 00006364 76ff50bc dfe0: 76ff4ec0 76ff4eb0 0001948c 001322c0 r10:00000036 r9:84e18c00 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