usercopy: Kernel memory exposure attempt detected from SLUB object 'kmalloc-32' (offset 0, size 512)! ------------[ cut here ]------------ kernel BUG at mm/usercopy.c:103! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 0 UID: 0 PID: 642 Comm: syz.2.105 Not tainted syzkaller #0 4acfbc369189e5cacd88ca5a92b3a107a9d116ed Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 RIP: 0010:usercopy_abort+0x89/0x90 mm/usercopy.c:103 Code: 89 cb 49 c7 c6 20 12 37 86 4c 0f 44 f6 48 c7 c7 c0 10 37 86 4c 89 de 4c 89 c9 4d 89 d1 50 53 41 56 e8 1b 75 ff ff 48 83 c4 18 <0f> 0b cc cc cc cc cc b8 00 34 e9 45 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90000c3fad0 EFLAGS: 00010292 RAX: 0000000000000065 RBX: 0000000000000000 RCX: 183f5caf23db9500 RDX: ffffc90002204000 RSI: 0000000000002e09 RDI: 0000000000002e0a RBP: ffffc90000c3fae0 R08: ffffc90000c3f7a7 R09: 1ffff92000187ef4 R10: dffffc0000000000 R11: fffff52000187ef5 R12: ffff888100041780 R13: 0000000000000001 R14: ffffffff86371220 R15: 0000000000000000 FS: 00007f1c16ced6c0(0000) GS:ffff8881f6c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1c16b58060 CR3: 000000011b222000 CR4: 00000000003526b0 Call Trace: __check_heap_object+0xc7/0x110 mm/slub.c:5800 check_heap_object mm/usercopy.c:198 [inline] __check_object_size+0x29a/0x870 mm/usercopy.c:257 check_object_size include/linux/thread_info.h:215 [inline] check_copy_size include/linux/thread_info.h:251 [inline] copy_to_user include/linux/uaccess.h:219 [inline] keyctl_pkey_e_d_s+0x252/0x3b0 security/keys/keyctl_pkey.c:259 __do_sys_keyctl security/keys/keyctl.c:1997 [inline] __se_sys_keyctl+0x780/0xe40 security/keys/keyctl.c:1874 __x64_sys_keyctl+0xc3/0xf0 security/keys/keyctl.c:1874 x64_sys_call+0x996/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:251 do_syscall_x64 arch/x86/entry/common.c:47 [inline] do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f1c15d9e559 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1c16ced028 EFLAGS: 00000246 ORIG_RAX: 00000000000000fa RAX: ffffffffffffffda RBX: 00007f1c16025fa0 RCX: 00007f1c15d9e559 RDX: 0000000000000000 RSI: 00002000000012c0 RDI: 0000000000000019 RBP: 00007f1c15e358b0 R08: 0000000000000000 R09: 0000000000000000 R10: 00002000000013c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f1c16026038 R14: 00007f1c16025fa0 R15: 00007ffdd0e69ec8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:usercopy_abort+0x89/0x90 mm/usercopy.c:103 Code: 89 cb 49 c7 c6 20 12 37 86 4c 0f 44 f6 48 c7 c7 c0 10 37 86 4c 89 de 4c 89 c9 4d 89 d1 50 53 41 56 e8 1b 75 ff ff 48 83 c4 18 <0f> 0b cc cc cc cc cc b8 00 34 e9 45 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90000c3fad0 EFLAGS: 00010292 RAX: 0000000000000065 RBX: 0000000000000000 RCX: 183f5caf23db9500 RDX: ffffc90002204000 RSI: 0000000000002e09 RDI: 0000000000002e0a RBP: ffffc90000c3fae0 R08: ffffc90000c3f7a7 R09: 1ffff92000187ef4 R10: dffffc0000000000 R11: fffff52000187ef5 R12: ffff888100041780 R13: 0000000000000001 R14: ffffffff86371220 R15: 0000000000000000 FS: 00007f1c16ced6c0(0000) GS:ffff8881f6c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd6a43f44b8 CR3: 000000011b222000 CR4: 00000000003526b0