usercopy: Kernel memory overwrite attempt detected to SLUB object 'task_struct' (offset 80, size 116)!
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kernel BUG at mm/usercopy.c:102!
Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM
Modules linked in:
CPU: 0 UID: 0 PID: 7063 Comm: syz.1.979 Not tainted 6.12.0-syzkaller #0
Hardware name: ARM-Versatile Express
PC is at usercopy_abort+0x98/0x9c mm/usercopy.c:102
LR is at __wake_up_klogd.part.0+0x7c/0xac kernel/printk/printk.c:4496
pc : [<819ae208>]    lr : [<802bd9c4>]    psr: 60000013
sp : eac69e38  ip : eac69d78  fp : eac69e5c
r10: 0000001a  r9 : 835e9800  r8 : 835ee050
r7 : dde724a0  r6 : 00000000  r5 : 00000074  r4 : 00000050
r3 : 835e9800  r2 : 00000000  r1 : 00000000  r0 : 00000066
Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
Control: 30c5387d  Table: 853b8500  DAC: fffffffd
Register r0 information: non-paged memory
Register r1 information: NULL pointer
Register r2 information: NULL pointer
Register r3 information: slab task_struct start 835e9800 pointer offset 0 size 3072
Register r4 information: non-paged memory
Register r5 information: non-paged memory
Register r6 information: NULL pointer
Register r7 information: non-slab/vmalloc memory
Register r8 information: slab task_struct start 835ee000 pointer offset 80 size 3072
Register r9 information: slab task_struct start 835e9800 pointer offset 0 size 3072
Register r10 information: non-paged memory
Register r11 information: 2-page vmalloc region starting at 0xeac68000 allocated at kernel_clone+0xac/0x3e4 kernel/fork.c:2787
Register r12 information: 2-page vmalloc region starting at 0xeac68000 allocated at kernel_clone+0xac/0x3e4 kernel/fork.c:2787
Process syz.1.979 (pid: 7063, stack limit = 0xeac68000)
Stack: (0xeac69e38 to 0xeac6a000)
9e20:                                                       8205dadc 8202f5a0
9e40: 820449b4 00000050 00000074 835e9800 eac69e8c eac69e60 804d1bc8 819ae17c
9e60: 00000074 eac69e70 802147a0 835ee050 00000074 00000000 835ee0c4 dde724a0
9e80: eac69ec4 eac69e90 80510994 804d1afc 00000074 fffffff6 eac69eb4 835ee050
9ea0: 00000074 fffffff6 00000000 00000000 835e9800 0000001a eac69ef4 eac69ec8
9ec0: 80209d90 80510718 835ee000 ddde4340 eac69ef4 eac69ee0 819d34cc 00000000
9ee0: 0000000c fffffff6 eac69f6c eac69ef8 8020a444 80209d0c 00000000 00000000
9f00: eac69f1c eac69f10 819d3398 8027c5a8 eac69f6c eac69f20 8028127c 819d3374
9f20: eac69f54 00000000 8027e1e4 60000013 819800d0 81997354 eac69f54 077c34bc
9f40: 0000000f 835ee000 0000000f 077c34bc 835ee000 0000000f fffffff6 00000000
9f60: eac69fa4 eac69f70 80252e9c 8020a11c 80202cc0 077c34bc eac69fac 00000000
9f80: 00000000 002862f4 0000001a 8020029c 835e9800 0000001a 00000000 eac69fa8
9fa0: 80200060 80252c70 00000000 00000000 0000000f 00000564 fffffff6 00000000
9fc0: 00000000 00000000 002862f4 0000001a 00000000 00006364 003d0f00 76b300bc
9fe0: 76b2fec0 76b2feb0 00018af0 00133450 60000010 0000000f 00000000 00000000
Call trace: 
[<819ae170>] (usercopy_abort) from [<804d1bc8>] (__check_heap_object+0xd8/0xf4 mm/slub.c:5651)
[<804d1af0>] (__check_heap_object) from [<80510994>] (check_heap_object mm/usercopy.c:196 [inline])
[<804d1af0>] (__check_heap_object) from [<80510994>] (__check_object_size mm/usercopy.c:251 [inline])
[<804d1af0>] (__check_heap_object) from [<80510994>] (__check_object_size+0x288/0x304 mm/usercopy.c:213)
 r8:dde724a0 r7:835ee0c4 r6:00000000 r5:00000074 r4:835ee050
[<8051070c>] (__check_object_size) from [<80209d90>] (check_object_size include/linux/thread_info.h:228 [inline])
[<8051070c>] (__check_object_size) from [<80209d90>] (__copy_from_user include/linux/uaccess.h:110 [inline])
[<8051070c>] (__check_object_size) from [<80209d90>] (user_regset_copyin include/linux/regset.h:268 [inline])
[<8051070c>] (__check_object_size) from [<80209d90>] (fpa_set+0x90/0x118 arch/arm/kernel/ptrace.c:587)
 r10:0000001a r9:835e9800 r8:00000000 r7:00000000 r6:fffffff6 r5:00000074
 r4:835ee050
[<80209d00>] (fpa_set) from [<8020a444>] (copy_regset_from_user include/linux/regset.h:337 [inline])
[<80209d00>] (fpa_set) from [<8020a444>] (arch_ptrace+0x334/0x424 arch/arm/kernel/ptrace.c:762)
 r6:fffffff6 r5:0000000c r4:00000000
[<8020a110>] (arch_ptrace) from [<80252e9c>] (__do_sys_ptrace kernel/ptrace.c:1285 [inline])
[<8020a110>] (arch_ptrace) from [<80252e9c>] (sys_ptrace+0x238/0x4dc kernel/ptrace.c:1258)
 r7:00000000 r6:fffffff6 r5:0000000f r4:835ee000
[<80252c64>] (sys_ptrace) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67)
Exception stack(0xeac69fa8 to 0xeac69ff0)
9fa0:                   00000000 00000000 0000000f 00000564 fffffff6 00000000
9fc0: 00000000 00000000 002862f4 0000001a 00000000 00006364 003d0f00 76b300bc
9fe0: 76b2fec0 76b2feb0 00018af0 00133450
 r10:0000001a r9:835e9800 r8:8020029c r7:0000001a r6:002862f4 r5:00000000
 r4:00000000
Code: e30d0ae0 e3480205 e58dc000 ebfff273 (e7f001f2) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	e30d0ae0 	movw	r0, #56032	@ 0xdae0
   4:	e3480205 	movt	r0, #33285	@ 0x8205
   8:	e58dc000 	str	ip, [sp]
   c:	ebfff273 	bl	0xffffc9e0
* 10:	e7f001f2 	udf	#18 <-- trapping instruction