usercopy: Kernel memory overwrite attempt detected to SLUB object 'kmalloc-32' (offset 8, size 32)! ------------[ cut here ]------------ kernel BUG at mm/usercopy.c:102! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 1 PID: 8261 Comm: syz-executor.2 Not tainted 6.9.0-rc2-next-20240403-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:usercopy_abort+0x84/0x90 mm/usercopy.c:102 Code: 49 89 ce 48 c7 c3 60 27 d8 8b 48 0f 44 de 48 c7 c7 00 26 d8 8b 4c 89 de 48 89 c1 41 52 41 56 53 e8 81 ac 75 09 48 83 c4 18 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc9000c50fd78 EFLAGS: 00010286 RAX: 0000000000000063 RBX: ffffffff8bd82760 RCX: 7b9a23b99b0a5000 RDX: ffffc90012350000 RSI: 0000000000027be5 RDI: 0000000000027be6 RBP: 0000000000000008 R08: ffffffff81760b5c R09: fffffbfff1c39b10 R10: dffffc0000000000 R11: fffffbfff1c39b10 R12: ffffea00018822c0 R13: 0000000000000020 R14: 0000000000000008 R15: 0000000000000020 FS: 00007f24182726c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002000cf3d CR3: 000000007e550000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __check_heap_object+0xb1/0x100 mm/slub.c:5482 check_heap_object mm/usercopy.c:196 [inline] __check_object_size+0x1e3/0x900 mm/usercopy.c:251 check_object_size include/linux/thread_info.h:215 [inline] check_copy_size include/linux/thread_info.h:251 [inline] copy_from_user include/linux/uaccess.h:182 [inline] handle_to_path fs/fhandle.c:203 [inline] do_handle_open+0x1f6/0x660 fs/fhandle.c:226 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x72/0x7a RIP: 0033:0x7f241747dde9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f24182720c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000130 RAX: ffffffffffffffda RBX: 00007f24175abf80 RCX: 00007f241747dde9 RDX: 0000000000200001 RSI: 0000000020001080 RDI: ffffffffffffffff RBP: 00007f24174ca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f24175abf80 R15: 00007ffdd4a355e8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:usercopy_abort+0x84/0x90 mm/usercopy.c:102 Code: 49 89 ce 48 c7 c3 60 27 d8 8b 48 0f 44 de 48 c7 c7 00 26 d8 8b 4c 89 de 48 89 c1 41 52 41 56 53 e8 81 ac 75 09 48 83 c4 18 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc9000c50fd78 EFLAGS: 00010286 RAX: 0000000000000063 RBX: ffffffff8bd82760 RCX: 7b9a23b99b0a5000 RDX: ffffc90012350000 RSI: 0000000000027be5 RDI: 0000000000027be6 RBP: 0000000000000008 R08: ffffffff81760b5c R09: fffffbfff1c39b10 R10: dffffc0000000000 R11: fffffbfff1c39b10 R12: ffffea00018822c0 R13: 0000000000000020 R14: 0000000000000008 R15: 0000000000000020 FS: 00007f24182726c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31b27000 CR3: 000000007e550000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400