Oops: general protection fault, probably for non-canonical address 0xdffffc000000000c: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000060-0x0000000000000067] CPU: 0 UID: 0 PID: 5331 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:configfs_depend_item_unlocked+0x96/0x420 fs/configfs/dir.c:1255 Code: df e8 ae 89 00 00 89 c5 31 ff 89 c6 e8 e3 3d 4b ff 85 ed 74 0a e8 da 38 4b 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 ce e8 bc ff 4c 8b 6b 60 48 89 df e8 72 89 RSP: 0018:ffffc9000e2f7ad8 EFLAGS: 00010206 RAX: 000000000000000c RBX: 0000000000000000 RCX: ffff888033442580 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000060 RBP: 0000000000000000 R08: ffffffff907a897f R09: 1ffffffff20f512f R10: dffffc0000000000 R11: fffffbfff20f5130 R12: ffffffff8f93db40 R13: 1ffff92001c5ef6c R14: dffffc0000000000 R15: ffff888013947800 FS: 00007feb874ee6c0(0000) GS:ffff88808c2bb000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007feb874abfe8 CR3: 0000000043a1e000 CR4: 0000000000352ef0 Call Trace: usbg_make_tpg+0x1e0/0x550 drivers/usb/gadget/function/f_tcm.c:1692 target_fabric_make_tpg+0xa8/0x6d0 drivers/target/target_core_fabric_configfs.c:947 configfs_mkdir+0x4f6/0x9e0 fs/configfs/dir.c:1369 vfs_mkdir+0x40c/0x620 fs/namei.c:5410 filename_mkdirat+0x285/0x510 fs/namei.c:5443 __do_sys_mkdir fs/namei.c:5470 [inline] __se_sys_mkdir+0x34/0x150 fs/namei.c:5467 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7feb8659e159 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:00007feb874edfe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007feb86826270 RCX: 00007feb8659e159 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000200000000600 RBP: 00007feb8663506b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007feb86826308 R14: 00007feb86826270 R15: 00007ffc2d6569a8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:configfs_depend_item_unlocked+0x96/0x420 fs/configfs/dir.c:1255 Code: df e8 ae 89 00 00 89 c5 31 ff 89 c6 e8 e3 3d 4b ff 85 ed 74 0a e8 da 38 4b 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 ce e8 bc ff 4c 8b 6b 60 48 89 df e8 72 89 RSP: 0018:ffffc9000e2f7ad8 EFLAGS: 00010206 RAX: 000000000000000c RBX: 0000000000000000 RCX: ffff888033442580 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000060 RBP: 0000000000000000 R08: ffffffff907a897f R09: 1ffffffff20f512f R10: dffffc0000000000 R11: fffffbfff20f5130 R12: ffffffff8f93db40 R13: 1ffff92001c5ef6c R14: dffffc0000000000 R15: ffff888013947800 FS: 00007feb874ee6c0(0000) GS:ffff88808c2bb000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007feb7a4ff000 CR3: 0000000043a1e000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: e8 ae 89 00 00 call 0x89b3 5: 89 c5 mov %eax,%ebp 7: 31 ff xor %edi,%edi 9: 89 c6 mov %eax,%esi b: e8 e3 3d 4b ff call 0xff4b3df3 10: 85 ed test %ebp,%ebp 12: 74 0a je 0x1e 14: e8 da 38 4b ff call 0xff4b38f3 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 ce e8 bc ff call 0xffbce903 35: 4c 8b 6b 60 mov 0x60(%rbx),%r13 39: 48 89 df mov %rbx,%rdi 3c: e8 .byte 0xe8 3d: 72 89 jb 0xffffffc8