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: 11774 Comm: syz.8.1311 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 : [<813aaec8>] lr : [<813aaeb8>] psr: 60000013 sp : dfc41d30 ip : dfc41d30 fp : dfc41d54 r10: 82b16f00 r9 : 00000003 r8 : 841c79c0 r7 : dfc41d90 r6 : 841c79c0 r5 : 00000000 r4 : 00000000 r3 : fee04f27 r2 : 81e15444 r1 : 00000001 r0 : 813aab38 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 8599a780 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 841c79c0 pointer offset 0 size 192 Register r7 information: 2-page vmalloc region starting at 0xdfc40000 allocated at vhost_task_create+0xe4/0x134 kernel/vhost_task.c:145 Register r8 information: slab kmalloc-192 start 841c79c0 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 0xdfc40000 allocated at vhost_task_create+0xe4/0x134 kernel/vhost_task.c:145 Register r12 information: 2-page vmalloc region starting at 0xdfc40000 allocated at vhost_task_create+0xe4/0x134 kernel/vhost_task.c:145 Process syz.8.1311 (pid: 11774, stack limit = 0xdfc40000) Stack: (0xdfc41d30 to 0xdfc42000) 1d20: 823fe320 841c79c0 829cf8ec 829cf8ec 1d40: 81e15904 841c7a04 dfc41d8c dfc41d58 813a6f60 813aad60 200000c0 00000000 1d60: dfc41d7c 200000c0 841c79c0 b5403587 200000c0 85a3e000 40946400 00000003 1d80: dfc41e4c dfc41d90 813a2ae0 813a6e64 656d6f63 705f6964 6f707261 00007472 1da0: 00000000 00004f27 0000001f 00010000 00000004 00000003 00000cc7 00000004 1dc0: 00080008 0000000e 00000006 00000002 00000001 00000001 00000001 00000006 1de0: 10000105 00000000 0001a44d 00000003 3fff7fff 00000089 00000010 00000001 1e00: 20001e58 0080000b 00000e69 0000003c 00000008 00000006 00000000 fffffff8 1e20: 00000000 ff6b7c67 00000000 85daf780 841c79c0 200000c0 200000c0 85a3e000 1e40: dfc41f14 dfc41e50 813a3aac 813a29ec 00000000 00000000 00000000 ff6b7c67 1e60: 00000000 00000000 8247054c 0000005f 83d83258 841c79f0 8421f294 85a3e000 1e80: dfc41ee4 dfc41e90 80797824 8078db88 00000064 00000001 00000000 dfc41eac 1ea0: 84d50cd0 834212a8 00006400 0000000b dfc41ea0 00000000 00000000 ff6b7c67 1ec0: 85daf780 40946400 200000c0 200000c0 85daf780 00000003 dfc41ef4 dfc41ee8 1ee0: 80797944 ff6b7c67 dfc41f14 40946400 00000000 85daf781 200000c0 85daf780 1f00: 00000003 85a3e000 dfc41fa4 dfc41f18 8056cdf8 813a34dc ecac8b10 85a3e000 1f20: dfc41f3c dfc41f30 81a38778 81a38648 dfc41f54 dfc41f40 8025e490 8028ef8c 1f40: dfc41fb0 40000000 dfc41f84 dfc41f58 802229ec 8025e44c 00000000 8281cddc 1f60: dfc41fb0 0014c820 ecac8b10 80222940 00000000 ff6b7c67 dfc41fac 00000000 1f80: 00000000 002f6308 00000036 8020029c 85a3e000 00000036 00000000 dfc41fa8 1fa0: 80200060 8056ccd4 00000000 00000000 00000003 40946400 200000c0 00000000 1fc0: 00000000 00000000 002f6308 00000036 002e0000 00000000 00006364 76f040bc 1fe0: 76f03ec0 76f03eb0 0001948c 001322c0 60000010 00000003 00000000 00000000 Call trace: [<813aad54>] (parport_attach) from [<813a6f60>] (comedi_device_attach+0x108/0x250 drivers/comedi/drivers.c:1006) r6:841c7a04 r5:81e15904 r4:829cf8ec [<813a6e58>] (comedi_device_attach) from [<813a2ae0>] (do_devconfig_ioctl+0x100/0x220 drivers/comedi/comedi_fops.c:872) r10:00000003 r9:40946400 r8:85a3e000 r7:200000c0 r6:b5403587 r5:841c79c0 r4:200000c0 [<813a29e0>] (do_devconfig_ioctl) from [<813a3aac>] (comedi_unlocked_ioctl+0x5dc/0x1c24 drivers/comedi/comedi_fops.c:2173) r8:85a3e000 r7:200000c0 r6:200000c0 r5:841c79c0 r4:85daf780 [<813a34d0>] (comedi_unlocked_ioctl) from [<8056cdf8>] (vfs_ioctl fs/ioctl.c:51 [inline]) [<813a34d0>] (comedi_unlocked_ioctl) from [<8056cdf8>] (do_vfs_ioctl fs/ioctl.c:552 [inline]) [<813a34d0>] (comedi_unlocked_ioctl) from [<8056cdf8>] (__do_sys_ioctl fs/ioctl.c:596 [inline]) [<813a34d0>] (comedi_unlocked_ioctl) from [<8056cdf8>] (sys_ioctl+0x130/0xba0 fs/ioctl.c:584) r10:85a3e000 r9:00000003 r8:85daf780 r7:200000c0 r6:85daf781 r5:00000000 r4:40946400 [<8056ccc8>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67) Exception stack(0xdfc41fa8 to 0xdfc41ff0) 1fa0: 00000000 00000000 00000003 40946400 200000c0 00000000 1fc0: 00000000 00000000 002f6308 00000036 002e0000 00000000 00006364 76f040bc 1fe0: 76f03ec0 76f03eb0 0001948c 001322c0 r10:00000036 r9:85a3e000 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