------------[ cut here ]------------ memcpy: detected field-spanning write (size 25) of single field "&fh->fb" at fs/overlayfs/export.c:799 (size 21) WARNING: CPU: 1 PID: 20060 at fs/overlayfs/export.c:799 ovl_fid_to_fh fs/overlayfs/export.c:799 [inline] WARNING: CPU: 1 PID: 20060 at fs/overlayfs/export.c:799 ovl_fh_to_dentry+0x8c7/0x960 fs/overlayfs/export.c:812 Modules linked in: CPU: 1 PID: 20060 Comm: syz-executor.4 Not tainted 6.1.0-rc3-syzkaller-00332-g089d1c31224e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:ovl_fid_to_fh fs/overlayfs/export.c:799 [inline] RIP: 0010:ovl_fh_to_dentry+0x8c7/0x960 fs/overlayfs/export.c:812 Code: ff e8 4d 9f 92 fe c6 05 20 17 04 0b 01 b9 15 00 00 00 48 c7 c7 e0 02 cc 8a 4c 89 fe 48 c7 c2 c0 04 cc 8a 31 c0 e8 49 3d 5a fe <0f> 0b e9 08 fa ff ff 89 d9 80 e1 07 38 c1 0f 8c 3f f9 ff ff 48 89 RSP: 0018:ffffc900155cfaa0 EFLAGS: 00010246 RAX: 3aec03e1f42ca300 RBX: ffff888025cddd80 RCX: 0000000000040000 RDX: ffffc9000cf6e000 RSI: 00000000000053d3 RDI: 00000000000053d4 RBP: ffffc900155cfbb0 R08: ffffffff816b9e3d R09: fffff52002ab9f0d R10: fffff52002ab9f0d R11: 1ffff92002ab9f0c R12: 1ffff92002ab9f60 R13: 000000000000001c R14: ffff888025cddd83 R15: 0000000000000019 FS: 00007fe25aba2700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fffac035ec8 CR3: 0000000027d9c000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: exportfs_decode_fh_raw+0x115/0x600 fs/exportfs/expfs.c:435 exportfs_decode_fh+0x38/0x70 fs/exportfs/expfs.c:575 do_handle_to_path fs/fhandle.c:152 [inline] handle_to_path fs/fhandle.c:207 [inline] do_handle_open+0x485/0x950 fs/fhandle.c:223 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fe259e8b5a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe25aba2168 EFLAGS: 00000246 ORIG_RAX: 0000000000000130 RAX: ffffffffffffffda RBX: 00007fe259fabf80 RCX: 00007fe259e8b5a9 RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003 RBP: 00007fe259ee67b0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff3abe425f R14: 00007fe25aba2300 R15: 0000000000022000