loop0: detected capacity change from 0 to 4096 ntfs3(loop0): Different NTFS sector size (2048) and media sector size (512). ntfs3(loop0): Failed to initialize $Extend/$ObjId. overlay: ./file1 is not a directory ------------[ cut here ]------------ DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff888012c6ad80, owner = 0x0, curr 0xffff888036972500, list not empty WARNING: kernel/locking/rwsem.c:1411 at __up_write kernel/locking/rwsem.c:1410 [inline], CPU#0: syz.0.0/5341 WARNING: kernel/locking/rwsem.c:1411 at up_write+0x2d4/0x410 kernel/locking/rwsem.c:1682, CPU#0: syz.0.0/5341 Modules linked in: CPU: 0 UID: 0 PID: 5341 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:__up_write kernel/locking/rwsem.c:1410 [inline] RIP: 0010:up_write+0x384/0x410 kernel/locking/rwsem.c:1682 Code: cc 8b 49 c7 c2 20 e6 cc 8b 4c 0f 44 d0 48 8b 7c 24 08 48 c7 c6 c0 e8 cc 8b 48 8b 14 24 4c 89 f1 4d 89 e0 4c 8b 4c 24 10 41 52 <67> 48 0f b9 3a 48 83 c4 08 e8 ce f7 0d 03 e9 6b fd ff ff 48 c7 c1 RSP: 0018:ffffc900064c7d80 EFLAGS: 00010246 RAX: ffffffff8bcce640 RBX: ffff888012c6ad80 RCX: ffff888012c6ad80 RDX: 0000000000000000 RSI: ffffffff8bcce8c0 RDI: ffffffff9036ca70 RBP: ffff888012c6add8 R08: 0000000000000000 R09: ffff888036972500 R10: ffffffff8bcce640 R11: ffffed100258d5b2 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff888012c6ad80 R15: 1ffff1100258d5b1 FS: 00007f0cec18b6c0(0000) GS:ffff88808c812000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000005000 CR3: 000000001261a000 CR4: 0000000000352ef0 Call Trace: inode_unlock include/linux/fs.h:1039 [inline] end_dirop fs/namei.c:2951 [inline] end_creating include/linux/namei.h:123 [inline] end_creating_path fs/namei.c:4990 [inline] filename_symlinkat+0x222/0x410 fs/namei.c:5670 __do_sys_symlink fs/namei.c:5695 [inline] __se_sys_symlink+0x4d/0x2b0 fs/namei.c:5691 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0ceb39c819 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:00007f0cec18afe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 00007f0ceb615fa0 RCX: 00007f0ceb39c819 RDX: 0000000000000000 RSI: 00002000000059c0 RDI: 00002000000049c0 RBP: 00007f0ceb432c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0ceb616038 R14: 00007f0ceb615fa0 R15: 00007ffc72953f68 ---------------- Code disassembly (best guess): 0: cc int3 1: 8b 49 c7 mov -0x39(%rcx),%ecx 4: c2 20 e6 ret $0xe620 7: cc int3 8: 8b 4c 0f 44 mov 0x44(%rdi,%rcx,1),%ecx c: d0 48 8b rorb $1,-0x75(%rax) f: 7c 24 jl 0x35 11: 08 48 c7 or %cl,-0x39(%rax) 14: c6 c0 e8 mov $0xe8,%al 17: cc int3 18: 8b 48 8b mov -0x75(%rax),%ecx 1b: 14 24 adc $0x24,%al 1d: 4c 89 f1 mov %r14,%rcx 20: 4d 89 e0 mov %r12,%r8 23: 4c 8b 4c 24 10 mov 0x10(%rsp),%r9 28: 41 52 push %r10 * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 48 83 c4 08 add $0x8,%rsp 33: e8 ce f7 0d 03 call 0x30df806 38: e9 6b fd ff ff jmp 0xfffffda8 3d: 48 rex.W 3e: c7 .byte 0xc7 3f: c1 .byte 0xc1