Oops: general protection fault, probably for non-canonical address 0xdffffc000000000c: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000060-0x0000000000000067] CPU: 0 UID: 0 PID: 5826 Comm: syz.3.4 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 RIP: 0010:configfs_depend_item_unlocked+0x96/0x420 fs/configfs/dir.c:1246 Code: df e8 1e 88 00 00 89 c5 31 ff 89 c6 e8 73 f9 59 ff 85 ed 74 0a e8 ba f4 59 ff 4d 89 fd eb 6c 48 8d 7b 60 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 74 05 e8 7e 66 c3 ff 4c 8b 6b 60 48 89 df e8 e2 87 RSP: 0018:ffffc9000583fad8 EFLAGS: 00010206 RAX: 000000000000000c RBX: 0000000000000000 RCX: ffff8880272fbe00 RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000060 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: fffffbfff1f5f247 R12: ffffffff8ec97440 R13: dffffc0000000000 R14: dffffc0000000000 R15: ffff888041dd1c00 FS: 00007f7895f856c0(0000) GS:ffff888125c42000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c35bed4 CR3: 000000003ca86000 CR4: 00000000003526f0 Call Trace: usbg_make_tpg+0x1f6/0x590 drivers/usb/gadget/function/f_tcm.c:1686 target_fabric_make_tpg+0xa8/0x6d0 drivers/target/target_core_fabric_configfs.c:939 configfs_mkdir+0x4f6/0x9e0 fs/configfs/dir.c:1360 vfs_mkdir+0x402/0x620 fs/namei.c:5276 filename_mkdirat+0x289/0x520 fs/namei.c:5309 __do_sys_mkdir fs/namei.c:5336 [inline] __se_sys_mkdir+0x34/0x150 fs/namei.c:5333 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7897d4de99 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:00007f7895f85028 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007f7897fd6090 RCX: 00007f7897d4de99 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000200000000600 RBP: 00007f7897de3eaf R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f7897fd6128 R14: 00007f7897fd6090 R15: 00007ffd05de69f8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:configfs_depend_item_unlocked+0x96/0x420 fs/configfs/dir.c:1246 Code: df e8 1e 88 00 00 89 c5 31 ff 89 c6 e8 73 f9 59 ff 85 ed 74 0a e8 ba f4 59 ff 4d 89 fd eb 6c 48 8d 7b 60 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 74 05 e8 7e 66 c3 ff 4c 8b 6b 60 48 89 df e8 e2 87 RSP: 0018:ffffc9000583fad8 EFLAGS: 00010206 RAX: 000000000000000c RBX: 0000000000000000 RCX: ffff8880272fbe00 RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000060 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: fffffbfff1f5f247 R12: ffffffff8ec97440 R13: dffffc0000000000 R14: dffffc0000000000 R15: ffff888041dd1c00 FS: 00007f7895f856c0(0000) GS:ffff888125c42000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c35bed4 CR3: 000000003ca86000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: e8 1e 88 00 00 call 0x8823 5: 89 c5 mov %eax,%ebp 7: 31 ff xor %edi,%edi 9: 89 c6 mov %eax,%esi b: e8 73 f9 59 ff call 0xff59f983 10: 85 ed test %ebp,%ebp 12: 74 0a je 0x1e 14: e8 ba f4 59 ff call 0xff59f4d3 19: 4d 89 fd mov %r15,%r13 1c: eb 6c jmp 0x8a 1e: 48 8d 7b 60 lea 0x60(%rbx),%rdi 22: 48 89 f8 mov %rdi,%rax 25: 48 c1 e8 03 shr $0x3,%rax * 29: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction 2e: 74 05 je 0x35 30: e8 7e 66 c3 ff call 0xffc366b3 35: 4c 8b 6b 60 mov 0x60(%rbx),%r13 39: 48 89 df mov %rbx,%rdi 3c: e8 .byte 0xe8 3d: e2 87 loop 0xffffffc6