genirq: Flags mismatch irq 25. 00200004 (comedi_parport) vs. 00215204 (timer) 8<--- cut here --- Unable to handle kernel paging request at virtual address fee08001 when write [fee08001] *pgd=80000080007003, *pmd=00000000 Internal error: Oops: a06 [#1] SMP ARM Modules linked in: CPU: 0 UID: 0 PID: 9880 Comm: syz.0.1450 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: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 : [<81408ae0>] lr : [<81408ad0>] psr: 60000013 sp : ea489d28 ip : ea489d28 fp : ea489d4c r10: 82b28ad8 r9 : 00000003 r8 : 844cd6c0 r7 : ea489d88 r6 : 844cd6c0 r5 : 00000000 r4 : 00000000 r3 : fee08001 r2 : 81e1a2b8 r1 : 00000001 r0 : 81408750 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 866188c0 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 844cd6c0 pointer offset 0 size 192 Register r7 information: 2-page vmalloc region starting at 0xea488000 allocated at kernel_clone+0xac/0x3ec kernel/fork.c:2651 Register r8 information: slab kmalloc-192 start 844cd6c0 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 0xea488000 allocated at kernel_clone+0xac/0x3ec kernel/fork.c:2651 Register r12 information: 2-page vmalloc region starting at 0xea488000 allocated at kernel_clone+0xac/0x3ec kernel/fork.c:2651 Process syz.0.1450 (pid: 9880, stack limit = 0xea488000) Stack: (0xea489d28 to 0xea48a000) 9d20: 82432d18 844cd6c0 829d3f08 829d3f08 81e1a778 844cd704 9d40: ea489d84 ea489d50 81404788 81408978 844cd6f0 00000000 ea489d74 200000c0 9d60: 844cd6c0 b5403587 844cd6f0 84f59800 40946400 00000003 ea489e44 ea489d88 9d80: 814000e0 8140468c 656d6f63 705f6964 6f707261 00007472 00000000 00008001 9da0: 00000019 00000001 00000000 00000002 00000cc7 00000008 00000007 0000000a 9dc0: 00000100 00000002 00000001 00000008 01100004 00000006 00000009 00000001 9de0: 0001a449 00000003 40000003 00000089 00000002 00000f27 00000006 0000800b 9e00: 00000008 00000005 00000008 00000008 00010000 fffffff7 00000000 88b1eb50 9e20: 00000000 851d73c0 844cd6c0 200000c0 844cd6f0 84f59800 ea489f14 ea489e48 9e40: 814010d4 813fffec 00000000 00000000 00000000 00000000 00000000 88b1eb50 9e60: 00000000 00000000 824a35ec 0000005f 8418aa30 00000064 844f999c 84f59800 9e80: ea489ee4 ea489e90 807b7ea8 807ae3cc 00000064 00000001 00000000 ea489eac 9ea0: 85c65610 8342e7f8 00006400 0000000b ea489ea0 00000000 00000000 88b1eb50 9ec0: 851d73c0 40946400 200000c0 200000c0 851d73c0 00000003 ea489ef4 ea489ee8 9ee0: 807b7fc8 88b1eb50 ea489f14 40946400 00000000 851d73c1 200000c0 851d73c0 9f00: 00000003 84f59800 ea489fa4 ea489f18 805855f0 81400b24 ecac8b10 84f59800 9f20: ea489f3c ea489f30 81aaf74c 81aaf61c ea489f54 ea489f40 8025bcbc 8028e0c4 9f40: ea489fb0 40000000 ea489f84 ea489f58 80221a38 8025bc78 00000000 8281d17c 9f60: ea489fb0 0014c880 ecac8b10 8022198c 00000000 88b1eb50 ea489fac 00000000 9f80: 00000000 00316310 00000036 8020029c 84f59800 00000036 00000000 ea489fa8 9fa0: 80200060 805854cc 00000000 00000000 00000003 40946400 200000c0 00000000 9fc0: 00000000 00000000 00316310 00000036 00300000 00000000 00006364 76fd60bc 9fe0: 76fd5ec0 76fd5eb0 0001929c 00132320 60000010 00000003 00000000 00000000 Call trace: [<8140896c>] (parport_attach) from [<81404788>] (comedi_device_attach+0x108/0x250 drivers/comedi/drivers.c:1069) r6:844cd704 r5:81e1a778 r4:829d3f08 [<81404680>] (comedi_device_attach) from [<814000e0>] (do_devconfig_ioctl+0x100/0x220 drivers/comedi/comedi_fops.c:928) r10:00000003 r9:40946400 r8:84f59800 r7:844cd6f0 r6:b5403587 r5:844cd6c0 r4:200000c0 [<813fffe0>] (do_devconfig_ioctl) from [<814010d4>] (comedi_unlocked_ioctl+0x5bc/0x1c2c drivers/comedi/comedi_fops.c:2240) r8:84f59800 r7:844cd6f0 r6:200000c0 r5:844cd6c0 r4:851d73c0 [<81400b18>] (comedi_unlocked_ioctl) from [<805855f0>] (vfs_ioctl fs/ioctl.c:51 [inline]) [<81400b18>] (comedi_unlocked_ioctl) from [<805855f0>] (do_vfs_ioctl fs/ioctl.c:551 [inline]) [<81400b18>] (comedi_unlocked_ioctl) from [<805855f0>] (__do_sys_ioctl fs/ioctl.c:595 [inline]) [<81400b18>] (comedi_unlocked_ioctl) from [<805855f0>] (sys_ioctl+0x130/0xba0 fs/ioctl.c:583) r10:84f59800 r9:00000003 r8:851d73c0 r7:200000c0 r6:851d73c1 r5:00000000 r4:40946400 [<805854c0>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67) Exception stack(0xea489fa8 to 0xea489ff0) 9fa0: 00000000 00000000 00000003 40946400 200000c0 00000000 9fc0: 00000000 00000000 00316310 00000036 00300000 00000000 00006364 76fd60bc 9fe0: 76fd5ec0 76fd5eb0 0001929c 00132320 r10:00000036 r9:84f59800 r8:8020029c r7:00000036 r6:00316310 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