genirq: Flags mismatch irq 35. 00200004 (comedi_parport) vs. 00200084 (kmi-pl050) 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: 10506 Comm: syz.1.1263 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 : dfbb5d30 ip : dfbb5d30 fp : dfbb5d54 r10: 82b16f00 r9 : 00000003 r8 : 83d08480 r7 : dfbb5d90 r6 : 83d08480 r5 : 00000000 r4 : 00000000 r3 : fee04f27 r2 : 81e15444 r1 : 00000001 r0 : 813aab38 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none Control: 30c5387d Table: 85b4d540 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 83d08480 pointer offset 0 size 192 Register r7 information: 2-page vmalloc region starting at 0xdfbb4000 allocated at kernel_clone+0xac/0x3ec kernel/fork.c:2605 Register r8 information: slab kmalloc-192 start 83d08480 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 0xdfbb4000 allocated at kernel_clone+0xac/0x3ec kernel/fork.c:2605 Register r12 information: 2-page vmalloc region starting at 0xdfbb4000 allocated at kernel_clone+0xac/0x3ec kernel/fork.c:2605 Process syz.1.1263 (pid: 10506, stack limit = 0xdfbb4000) Stack: (0xdfbb5d30 to 0xdfbb6000) 5d20: 823fe320 83d08480 829cf8ec 829cf8ec 5d40: 81e15904 83d084c4 dfbb5d8c dfbb5d58 813a6f60 813aad60 200000c0 00000000 5d60: dfbb5d7c 200000c0 83d08480 b5403587 200000c0 84228000 40946400 00000003 5d80: dfbb5e4c dfbb5d90 813a2ae0 813a6e64 656d6f63 705f6964 6f707261 00007472 5da0: 00000000 00004f27 00000023 00010000 00000004 00000005 00000cc7 00000008 5dc0: 00000007 0000000a 00000100 00000002 00000001 00000002 00000001 00000006 5de0: 00000101 00000000 0001a449 00000003 40000003 00000089 0000caa7 00000000 5e00: 20001e58 0000000b 00000e69 0000003c 00000008 00000006 00000000 fffffff8 5e20: 00000000 9a28042c 00000000 848a6540 83d08480 200000c0 200000c0 84228000 5e40: dfbb5f14 dfbb5e50 813a3aac 813a29ec 00000000 00000000 00000000 9a28042c 5e60: 00000000 00000000 8247054c 0000005f 83c7f658 83d084b0 83d2899c 84228000 5e80: dfbb5ee4 dfbb5e90 80797824 8078db88 00000064 00000001 00000000 dfbb5eac 5ea0: 848d9850 83421c38 00006400 0000000b dfbb5ea0 00000000 00000000 9a28042c 5ec0: 848a6540 40946400 200000c0 200000c0 848a6540 00000003 dfbb5ef4 dfbb5ee8 5ee0: 80797944 9a28042c dfbb5f14 40946400 00000000 848a6541 200000c0 848a6540 5f00: 00000003 84228000 dfbb5fa4 dfbb5f18 8056cdf8 813a34dc ecac8b10 84228000 5f20: dfbb5f3c dfbb5f30 81a38778 81a38648 dfbb5f54 dfbb5f40 8025e490 8028ef8c 5f40: dfbb5fb0 40000000 dfbb5f84 dfbb5f58 802229ec 8025e44c 00000000 8281cddc 5f60: dfbb5fb0 0014c820 ecac8b10 80222940 00000000 9a28042c dfbb5fac 00000000 5f80: 00000000 002f6308 00000036 8020029c 84228000 00000036 00000000 dfbb5fa8 5fa0: 80200060 8056ccd4 00000000 00000000 00000003 40946400 200000c0 00000000 5fc0: 00000000 00000000 002f6308 00000036 002e0000 00000000 00006364 76f020bc 5fe0: 76f01ec0 76f01eb0 0001948c 001322c0 60000010 00000003 00000000 00000000 Call trace: [<813aad54>] (parport_attach) from [<813a6f60>] (comedi_device_attach+0x108/0x250 drivers/comedi/drivers.c:1006) r6:83d084c4 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 r8:84228000 r7:200000c0 r6:b5403587 r5:83d08480 r4:200000c0 [<813a29e0>] (do_devconfig_ioctl) from [<813a3aac>] (comedi_unlocked_ioctl+0x5dc/0x1c24 drivers/comedi/comedi_fops.c:2173) r8:84228000 r7:200000c0 r6:200000c0 r5:83d08480 r4:848a6540 [<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) r10:84228000 r9:00000003 r8:848a6540 r7:200000c0 r6:848a6541 r5:00000000 r4:40946400 [<8056ccc8>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67) Exception stack(0xdfbb5fa8 to 0xdfbb5ff0) 5fa0: 00000000 00000000 00000003 40946400 200000c0 00000000 5fc0: 00000000 00000000 002f6308 00000036 002e0000 00000000 00006364 76f020bc 5fe0: 76f01ec0 76f01eb0 0001948c 001322c0 r10:00000036 r9:84228000 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