usercopy: Kernel memory overwrite attempt detected to SLUB object 'kmalloc-32' (offset 8, size 28)! ------------[ cut here ]------------ kernel BUG at mm/usercopy.c:102! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 1 PID: 10149 Comm: syz-executor.4 Not tainted 6.9.0-rc2-next-20240402-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 e0 27 d8 8b 48 0f 44 de 48 c7 c7 80 26 d8 8b 4c 89 de 48 89 c1 41 52 41 56 53 e8 b1 6f 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:ffffc90002f0fd78 EFLAGS: 00010286 RAX: 0000000000000063 RBX: ffffffff8bd827e0 RCX: 435e93d065de7600 RDX: ffffc900137af000 RSI: 0000000000003325 RDI: 0000000000003326 RBP: 0000000000000008 R08: ffffffff81760b9c R09: 1ffff920005e1f4c R10: dffffc0000000000 R11: fffff520005e1f4d R12: ffffea0000b62cc0 R13: 000000000000001c R14: 0000000000000008 R15: 000000000000001c FS: 00007f84115526c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8411551c98 CR3: 00000000299f4000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __check_heap_object+0xb1/0x100 mm/slub.c:5461 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: 0033:0x7f841087dda9 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:00007f84115520c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000130 RAX: ffffffffffffffda RBX: 00007f84109abf80 RCX: 00007f841087dda9 RDX: 0000000000004002 RSI: 000000002000be80 RDI: ffffffffffffffff RBP: 00007f84108ca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f84109abf80 R15: 00007ffd903c5768 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:usercopy_abort+0x84/0x90 mm/usercopy.c:102 Code: 49 89 ce 48 c7 c3 e0 27 d8 8b 48 0f 44 de 48 c7 c7 80 26 d8 8b 4c 89 de 48 89 c1 41 52 41 56 53 e8 b1 6f 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:ffffc90002f0fd78 EFLAGS: 00010286 RAX: 0000000000000063 RBX: ffffffff8bd827e0 RCX: 435e93d065de7600 RDX: ffffc900137af000 RSI: 0000000000003325 RDI: 0000000000003326 RBP: 0000000000000008 R08: ffffffff81760b9c R09: 1ffff920005e1f4c R10: dffffc0000000000 R11: fffff520005e1f4d R12: ffffea0000b62cc0 R13: 000000000000001c R14: 0000000000000008 R15: 000000000000001c FS: 00007f84115526c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe64a685000 CR3: 00000000299f4000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400