netlink: 16 bytes leftover after parsing attributes in process `syz.2.702'. 8<--- cut here --- Unable to handle kernel paging request at virtual address fee09003 when write [fee09003] *pgd=80000080007003, *pmd=00000000 Internal error: Oops: a06 [#1] SMP ARM Modules linked in: CPU: 1 UID: 0 PID: 7213 Comm: syz.2.702 Not tainted syzkaller #0 PREEMPT Hardware name: ARM-Versatile Express PC is at __raw_writeb arch/arm/include/asm/io.h:88 [inline] PC is at subdev_8255_io drivers/comedi/drivers/comedi_8255.c:47 [inline] PC is at subdev_8255_io+0x60/0x6c drivers/comedi/drivers/comedi_8255.c:43 LR is at subdev_8255_io drivers/comedi/drivers/comedi_8255.c:47 [inline] LR is at subdev_8255_io+0x4c/0x6c drivers/comedi/drivers/comedi_8255.c:43 pc : [<81466a50>] lr : [<81466a3c>] psr: 60000013 sp : dfae9cb8 ip : dfae9cb8 fp : dfae9cd4 r10: 00009000 r9 : 00000004 r8 : dfae9da4 r7 : 00000000 r6 : 0000009b r5 : 846ab6c0 r4 : 00009003 r3 : 0000009b r2 : fee09003 r1 : 00000001 r0 : 846ab6c0 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none Control: 30c5387d Table: 8692bb40 DAC: 00000000 Register r0 information: slab kmalloc-192 start 846ab6c0 pointer offset 0 size 192 Register r1 information: non-paged memory Register r2 information: 0-page vmalloc region starting at 0xfee00000 allocated at pci_reserve_io+0x0/0x38 arch/arm/mm/mmu.c:1048 Register r3 information: non-paged memory Register r4 information: non-paged memory Register r5 information: slab kmalloc-192 start 846ab6c0 pointer offset 0 size 192 Register r6 information: non-paged memory Register r7 information: NULL pointer Register r8 information: 2-page vmalloc region starting at 0xdfae8000 allocated at kernel_clone+0xbc/0x43c kernel/fork.c:2721 Register r9 information: non-paged memory Register r10 information: non-paged memory Register r11 information: 2-page vmalloc region starting at 0xdfae8000 allocated at kernel_clone+0xbc/0x43c kernel/fork.c:2721 Register r12 information: 2-page vmalloc region starting at 0xdfae8000 allocated at kernel_clone+0xbc/0x43c kernel/fork.c:2721 Process syz.2.702 (pid: 7213, stack limit = 0xdfae8000) Stack: (0xdfae9cb8 to 0xdfaea000) 9ca0: 814669f0 00009000 9cc0: 846ab6c0 00000000 dfae9cf4 dfae9cd8 8146672c 814669fc 00009000 80532538 9ce0: 84eb3480 84eb3480 dfae9d14 dfae9cf8 81466ae4 814666e0 846ab6c0 00000000 9d00: 84eb3480 00000000 dfae9d54 dfae9d18 81466c94 81466a68 ffffffff 00000004 9d20: 82a20900 00000000 00000000 82bd3438 846ab6c0 00000000 dfae9d90 846ab6c0 9d40: 00000000 82d2cdc4 dfae9d8c dfae9d58 81455620 81466c2c 40946400 00000000 9d60: dfae9d7c 20000140 846ab6c0 b5403587 40946400 00000001 00000007 84010000 9d80: dfae9e4c dfae9d90 81450e2c 81455524 35353238 00000000 00000000 00000000 9da0: 00000000 00009000 00000000 00000a1a 00000004 00000004 0800afa3 00000004 9dc0: 00000008 00005857 00000002 00000007 00000009 00000001 00000005 00000006 9de0: 00000501 00000000 00000004 00000002 0000000a 00000008 0000caa2 00001003 9e00: 20001e5b 02000003 00000e69 00000002 00000004 00004086 00000000 00000004 9e20: 00000000 51ddcef1 00000000 838fbe00 846ab6c0 20000140 40946400 00000001 9e40: dfae9f14 dfae9e50 81452150 81450d64 00000000 51ddcef1 00000000 00000000 9e60: 82531804 dfae9ea4 0000005f 8459a408 00000064 846ab6f0 dfae9ee4 dfae9e88 9e80: 807ea1fc 807e0510 00000064 00000001 00000000 dfae9ea4 833653d0 8341ff68 9ea0: 00006400 0000000b dfae9e98 00000000 00000000 51ddcef1 00000000 838fbe00 9ec0: 40946400 20000140 20000140 838fbe00 00000007 84010000 dfae9ef4 dfae9ee8 9ee0: 807ea330 51ddcef1 dfae9f14 00000000 838fbe01 40946400 20000140 838fbe00 9f00: 00000007 84010000 dfae9fa4 dfae9f18 805a1b84 81451e08 ecac8b10 84010000 9f20: dfae9f3c dfae9f30 81b17c14 81b17ae0 dfae9f54 dfae9f40 8025a6bc 8028e2a4 9f40: dfae9fb0 40000000 dfae9f84 dfae9f58 80220be0 8025a678 00000000 82a1c63c 9f60: dfae9fb0 0013e9b0 ecac8b10 80220b34 00000000 51ddcef1 dfae9fac 00000000 9f80: 00000000 00346450 00000036 8020029c 84010000 00000036 00000000 dfae9fa8 9fa0: 80200060 805a194c 00000000 00000000 00000007 40946400 20000140 00000000 9fc0: 00000000 00000000 00346450 00000036 00346418 00000000 00000001 76f410dc 9fe0: 76f40e88 76f40e78 00018ebc 00130810 60000010 00000007 00000000 00000000 Call trace: [<814669f0>] (subdev_8255_io) from [<8146672c>] (subdev_8255_do_config+0x58/0x60 drivers/comedi/drivers/comedi_8255.c:115) r7:00000000 r6:846ab6c0 r5:00009000 r4:814669f0 [<814666d4>] (subdev_8255_do_config) from [<81466ae4>] (__subdev_8255_init drivers/comedi/drivers/comedi_8255.c:172 [inline]) [<814666d4>] (subdev_8255_do_config) from [<81466ae4>] (subdev_8255_io_init+0x88/0x98 drivers/comedi/drivers/comedi_8255.c:192) r4:84eb3480 [<81466a5c>] (subdev_8255_io_init) from [<81466c94>] (dev_8255_attach drivers/comedi/drivers/8255.c:84 [inline]) [<81466a5c>] (subdev_8255_io_init) from [<81466c94>] (dev_8255_attach+0x74/0x138 drivers/comedi/drivers/8255.c:46) r7:00000000 r6:84eb3480 r5:00000000 r4:846ab6c0 [<81466c20>] (dev_8255_attach) from [<81455620>] (comedi_device_attach+0x108/0x244 drivers/comedi/drivers.c:1101) r10:82d2cdc4 r9:00000000 r8:846ab6c0 r7:dfae9d90 r6:00000000 r5:846ab6c0 r4:82bd3438 [<81455518>] (comedi_device_attach) from [<81450e2c>] (do_devconfig_ioctl+0xd4/0x21c drivers/comedi/comedi_fops.c:930) r10:84010000 r9:00000007 r8:00000001 r7:40946400 r6:b5403587 r5:846ab6c0 r4:20000140 [<81450d58>] (do_devconfig_ioctl) from [<81452150>] (comedi_unlocked_ioctl+0x354/0x1db8 drivers/comedi/comedi_fops.c:2302) r8:00000001 r7:40946400 r6:20000140 r5:846ab6c0 r4:838fbe00 [<81451dfc>] (comedi_unlocked_ioctl) from [<805a1b84>] (vfs_ioctl fs/ioctl.c:51 [inline]) [<81451dfc>] (comedi_unlocked_ioctl) from [<805a1b84>] (do_vfs_ioctl fs/ioctl.c:551 [inline]) [<81451dfc>] (comedi_unlocked_ioctl) from [<805a1b84>] (__do_sys_ioctl fs/ioctl.c:595 [inline]) [<81451dfc>] (comedi_unlocked_ioctl) from [<805a1b84>] (sys_ioctl+0x244/0xb5c fs/ioctl.c:583) r10:84010000 r9:00000007 r8:838fbe00 r7:20000140 r6:40946400 r5:838fbe01 r4:00000000 [<805a1940>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67) Exception stack(0xdfae9fa8 to 0xdfae9ff0) 9fa0: 00000000 00000000 00000007 40946400 20000140 00000000 9fc0: 00000000 00000000 00346450 00000036 00346418 00000000 00000001 76f410dc 9fe0: 76f40e88 76f40e78 00018ebc 00130810 r10:00000036 r9:84010000 r8:8020029c r7:00000036 r6:00346450 r5:00000000 r4:00000000 Code: e6ef3076 e0842002 e7f32052 e2422612 (e5c23000) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: e6ef3076 uxtb r3, r6 4: e0842002 add r2, r4, r2 8: e7f32052 ubfx r2, r2, #0, #20 c: e2422612 sub r2, r2, #18874368 @ 0x1200000 * 10: e5c23000 strb r3, [r2] <-- trapping instruction