genirq: Flags mismatch irq 31. 00200001 (comedi_parport) vs. 00200081 (virtio0) 8<--- cut here --- Unable to handle kernel paging request at virtual address fee00d00 when write [fee00d00] *pgd=80000080007003, *pmd=00000000 Internal error: Oops: a06 [#1] SMP ARM Modules linked in: CPU: 0 UID: 0 PID: 13376 Comm: syz.1.2328 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:291 [inline] PC is at parport_attach+0x184/0x1e0 drivers/comedi/drivers/comedi_parport.c:224 LR is at parport_attach drivers/comedi/drivers/comedi_parport.c:291 [inline] LR is at parport_attach+0x174/0x1e0 drivers/comedi/drivers/comedi_parport.c:224 pc : [<81459a3c>] lr : [<81459a2c>] psr: 60000013 sp : dfb91d30 ip : dfb91d30 fp : dfb91d54 r10: 82d2cdc4 r9 : 00000003 r8 : 8471d300 r7 : dfb91d90 r6 : 8471d300 r5 : 00000000 r4 : 00000000 r3 : fee00d00 r2 : 81e277a8 r1 : 00000001 r0 : 8145969c Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 862551c0 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:1048 Register r4 information: NULL pointer Register r5 information: NULL pointer Register r6 information: slab kmalloc-192 start 8471d300 pointer offset 0 size 192 Register r7 information: 2-page vmalloc region starting at 0xdfb90000 allocated at kernel_clone+0xbc/0x43c kernel/fork.c:2721 Register r8 information: slab kmalloc-192 start 8471d300 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 0xdfb90000 allocated at kernel_clone+0xbc/0x43c kernel/fork.c:2721 Register r12 information: 2-page vmalloc region starting at 0xdfb90000 allocated at kernel_clone+0xbc/0x43c kernel/fork.c:2721 Process syz.1.2328 (pid: 13376, stack limit = 0xdfb90000) Stack: (0xdfb91d30 to 0xdfb92000) 1d20: 824bcf8c 8471d300 00000000 82bd2c7c 1d40: 81e27c68 00000000 dfb91d8c dfb91d58 814555a0 814598c4 40946400 00000000 1d60: dfb91d7c 20000180 8471d300 b5403587 40946400 00000003 00000003 847fbe80 1d80: dfb91e4c dfb91d90 81450dac 814554a4 656d6f63 705f6964 6f707261 00007472 1da0: 00000000 00000d00 0000001f 00000006 00000fff 00000003 00000cc7 00000000 1dc0: 00000006 00000005 000100ff 00000002 00000001 00000001 00000002 00000009 1de0: 00000003 0bc761c6 00000009 00000042 40000003 00000fff 00000008 00000005 1e00: 02000006 0000800b 00000032 00000005 00000002 0000000d 00000001 ffffff5c 1e20: 00000000 bb93e16e 00000000 8651e600 8471d300 20000180 40946400 00000003 1e40: dfb91f14 dfb91e50 814520d0 81450ce4 00000000 bb93e16e 00000000 00000000 1e60: 82531804 dfb91ea4 0000005f 84116990 00000064 8471d330 dfb91ee4 dfb91e88 1e80: 807ea1b0 807e04c4 00000064 00000001 00000000 dfb91ea4 8335c910 8342ecc0 1ea0: 00006400 0000000b dfb91e98 00000000 00000000 bb93e16e 00000000 8651e600 1ec0: 40946400 20000180 20000180 8651e600 00000003 847fbe80 dfb91ef4 dfb91ee8 1ee0: 807ea2e4 bb93e16e dfb91f14 00000000 8651e601 40946400 20000180 8651e600 1f00: 00000003 847fbe80 dfb91fa4 dfb91f18 805a1b84 81451d88 ecac8b10 847fbe80 1f20: dfb91f3c dfb91f30 81b17b94 81b17a60 dfb91f54 dfb91f40 8025a6bc 8028e2a4 1f40: dfb91fb0 40000000 dfb91f84 dfb91f58 80220be0 8025a678 00000000 82a1c63c 1f60: dfb91fb0 0013e9b0 ecac8b10 80220b34 00000000 bb93e16e dfb91fac 00000000 1f80: 00000000 00346310 00000036 8020029c 847fbe80 00000036 00000000 dfb91fa8 1fa0: 80200060 805a194c 00000000 00000000 00000003 40946400 20000180 00000000 1fc0: 00000000 00000000 00346310 00000036 003462d8 00000000 00000001 76fe30dc 1fe0: 76fe2e88 76fe2e78 00018ebc 00130810 60000010 00000003 00000000 00000000 Call trace: [<814598b8>] (parport_attach) from [<814555a0>] (comedi_device_attach+0x108/0x244 drivers/comedi/drivers.c:1101) r6:00000000 r5:81e27c68 r4:82bd2c7c [<81455498>] (comedi_device_attach) from [<81450dac>] (do_devconfig_ioctl+0xd4/0x21c drivers/comedi/comedi_fops.c:930) r10:847fbe80 r9:00000003 r8:00000003 r7:40946400 r6:b5403587 r5:8471d300 r4:20000180 [<81450cd8>] (do_devconfig_ioctl) from [<814520d0>] (comedi_unlocked_ioctl+0x354/0x1db8 drivers/comedi/comedi_fops.c:2302) r8:00000003 r7:40946400 r6:20000180 r5:8471d300 r4:8651e600 [<81451d7c>] (comedi_unlocked_ioctl) from [<805a1b84>] (vfs_ioctl fs/ioctl.c:51 [inline]) [<81451d7c>] (comedi_unlocked_ioctl) from [<805a1b84>] (do_vfs_ioctl fs/ioctl.c:551 [inline]) [<81451d7c>] (comedi_unlocked_ioctl) from [<805a1b84>] (__do_sys_ioctl fs/ioctl.c:595 [inline]) [<81451d7c>] (comedi_unlocked_ioctl) from [<805a1b84>] (sys_ioctl+0x244/0xb5c fs/ioctl.c:583) r10:847fbe80 r9:00000003 r8:8651e600 r7:20000180 r6:40946400 r5:8651e601 r4:00000000 [<805a1940>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67) Exception stack(0xdfb91fa8 to 0xdfb91ff0) 1fa0: 00000000 00000000 00000003 40946400 20000180 00000000 1fc0: 00000000 00000000 00346310 00000036 003462d8 00000000 00000001 76fe30dc 1fe0: 76fe2e88 76fe2e78 00018ebc 00130810 r10:00000036 r9:847fbe80 r8:8020029c r7:00000036 r6:00346310 r5:00000000 r4:00000000 Code: e5963064 e3a04000 e7f33053 e2433612 (e5c34000) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: e5963064 ldr r3, [r6, #100] @ 0x64 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