BUG: stack guard page was hit in file_open (9)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 414e6c8e941c ANDROID: fix up abi issue with struct snd_pcm..
git tree: android12-5.10-lts
console output: https://syzkaller.appspot.com/x/log.txt?x=163d659b700000
kernel config: https://syzkaller.appspot.com/x/.config?x=c82cd64ef7210f0c
dashboard link: https://syzkaller.appspot.com/bug?extid=4ae5e51dd2535579788a
compiler: Debian clang version 11.0.1-2, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15e3ecd7700000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=132ec880f00000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4ae5e5...@syzkaller.appspotmail.com

BUG: stack guard page was hit at ffffc90000dbfff8 (stack is ffffc90000dc0000..ffffc90000dc7fff)
kernel stack overflow (double-fault): 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 452 Comm: syz-executor231 Not tainted 5.10.109-syzkaller-00693-g414e6c8e941c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:memset+0x6/0x40 mm/kasan/shadow.c:43
Code: 00 00 66 90 55 48 89 e5 89 f6 48 8b 4d 08 ba 01 00 00 00 e8 3c ed ff ff 5d c3 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 <41> 56 53 49 89 d7 41 89 f6 48 89 fb 48 8b 4d 08 48 89 d6 ba 01 00
RSP: 0018:ffffc90000dc0000 EFLAGS: 00010246
RAX: ffff8881041913c0 RBX: dffffc0000000000 RCX: ffffc90000dc0130
RDX: 0000000000000060 RSI: 0000000000000000 RDI: ffffc90000dc00a0
RBP: ffffc90000dc0008 R08: dffffc0000000000 R09: ffffc90000dc0180
R10: fffff520001b8033 R11: 0000000000000000 R12: ffff8881041913c0
R13: ffffc90000dc00a0 R14: ffff8881041913c0 R15: 0000000000000000
FS: 00007fe8d43de700(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc90000dbfff8 CR3: 000000010f823000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__unwind_start+0x34/0x420 arch/x86/kernel/unwind_frame.c:368
unwind_start arch/x86/include/asm/unwind.h:60 [inline]
arch_stack_walk+0xdc/0x140 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x11b/0x1e0 kernel/stacktrace.c:121
save_stack+0x96/0x1e0 mm/page_owner.c:146
__set_page_owner+0x3b/0x300 mm/page_owner.c:219
set_page_owner include/linux/page_owner.h:35 [inline]
post_alloc_hook mm/page_alloc.c:2385 [inline]
prep_new_page mm/page_alloc.c:2391 [inline]
get_page_from_freelist+0xa74/0xa90 mm/page_alloc.c:4063
__alloc_pages_nodemask+0x3c8/0x820 mm/page_alloc.c:5113
alloc_slab_page mm/slub.c:1815 [inline]
allocate_slab+0x6b/0x350 mm/slub.c:1817
new_slab mm/slub.c:1878 [inline]
new_slab_objects mm/slub.c:2637 [inline]
___slab_alloc+0x143/0x2f0 mm/slub.c:2800
__slab_alloc mm/slub.c:2840 [inline]
slab_alloc_node mm/slub.c:2922 [inline]
slab_alloc mm/slub.c:2964 [inline]
kmem_cache_alloc+0x26f/0x380 mm/slub.c:2969
kmem_cache_zalloc include/linux/slab.h:654 [inline]
__alloc_file+0x29/0x3b0 fs/file_table.c:101
alloc_empty_file+0xac/0x1b0 fs/file_table.c:151
dentry_open+0x4e/0x100 fs/open.c:956
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open fs/open.c:942 [inline]
dentry_open+0xb8/0x100 fs/open.c:958
file_open+0x2a3/0x650 fs/incfs/vfs.c:1427
do_dentry_open+0x7a5/0x1090 fs/open.c:819
vfs_open+0x73/0x80 fs/open.c:942
do_open fs/namei.c:3327 [inline]
path_openat+0x264d/0x3500 fs/namei.c:3444
do_filp_open+0x200/0x440 fs/namei.c:3471
do_sys_openat2+0x13b/0x470 fs/open.c:1211
do_sys_open fs/open.c:1227 [inline]
__do_sys_openat fs/open.c:1243 [inline]
__se_sys_openat fs/open.c:1238 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1238
do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fe8d440f0f4
Code: 84 00 00 00 00 00 44 89 54 24 0c e8 e6 fb ff ff 44 8b 54 24 0c 44 89 e2 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 89 44 24 0c e8 18 fc ff ff 8b 44
RSP: 002b:00007fe8d43de060 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fe8d43de6b8 RCX: 00007fe8d440f0f4
RDX: 0000000000010000 RSI: 00000000200000c0 RDI: 00000000ffffff9c
RBP: 00000000200000c0 R08: 0000000000000000 R09: 00007fe8d43de700
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000010000
R13: 00007ffee1c252df R14: 00007fe8d43de300 R15: 0000000000022000
Modules linked in:
---[ end trace 16ae4a9a9a223113 ]---
RIP: 0010:memset+0x6/0x40 mm/kasan/shadow.c:43
Code: 00 00 66 90 55 48 89 e5 89 f6 48 8b 4d 08 ba 01 00 00 00 e8 3c ed ff ff 5d c3 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 <41> 56 53 49 89 d7 41 89 f6 48 89 fb 48 8b 4d 08 48 89 d6 ba 01 00
RSP: 0018:ffffc90000dc0000 EFLAGS: 00010246
RAX: ffff8881041913c0 RBX: dffffc0000000000 RCX: ffffc90000dc0130
RDX: 0000000000000060 RSI: 0000000000000000 RDI: ffffc90000dc00a0
RBP: ffffc90000dc0008 R08: dffffc0000000000 R09: ffffc90000dc0180
R10: fffff520001b8033 R11: 0000000000000000 R12: ffff8881041913c0
R13: ffffc90000dc00a0 R14: ffff8881041913c0 R15: 0000000000000000
FS: 00007fe8d43de700(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc90000dbfff8 CR3: 000000010f823000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 66 90 xchg %ax,%ax
4: 55 push %rbp
5: 48 89 e5 mov %rsp,%rbp
8: 89 f6 mov %esi,%esi
a: 48 8b 4d 08 mov 0x8(%rbp),%rcx
e: ba 01 00 00 00 mov $0x1,%edx
13: e8 3c ed ff ff callq 0xffffed54
18: 5d pop %rbp
19: c3 retq
1a: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1)
21: 00 00 00
24: 55 push %rbp
25: 48 89 e5 mov %rsp,%rbp
28: 41 57 push %r15
* 2a: 41 56 push %r14 <-- trapping instruction
2c: 53 push %rbx
2d: 49 89 d7 mov %rdx,%r15
30: 41 89 f6 mov %esi,%r14d
33: 48 89 fb mov %rdi,%rbx
36: 48 8b 4d 08 mov 0x8(%rbp),%rcx
3a: 48 89 d6 mov %rdx,%rsi
3d: ba .byte 0xba
3e: 01 00 add %eax,(%rax)


---
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[Tadeusz Struk]

#syz dup: BUG: stack guard page was hit in file_open

--
Thanks,
Tadeusz