From: syzbot ci <syzbot+ciba1be8bde19c605d@syzkaller.appspotmail.com>
To: david.hunter.linux@gmail.com, frank.li@vivo.com,
glaubitz@physik.fu-berlin.de, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org, skhan@linuxfoundation.org,
slava@dubeyko.com, swarajgaikwad1925@gmail.com,
syzbot@syzkaller.appspotmail.com,
syzkaller-bugs@googlegroups.com
Cc: syzbot@lists.linux.dev, syzkaller-bugs@googlegroups.com
Subject: [syzbot ci] Re: hfsplus: fix memory leak on mount failure
Date: Sat, 06 Dec 2025 01:25:09 -0800 [thread overview]
Message-ID: <6933f675.a70a0220.38f243.001f.GAE@google.com> (raw)
In-Reply-To: <20251206000902.71178-1-swarajgaikwad1925@gmail.com>
syzbot ci has tested the following series
[v1] hfsplus: fix memory leak on mount failure
https://lore.kernel.org/all/20251206000902.71178-1-swarajgaikwad1925@gmail.com
* [PATCH v1] hfsplus: fix memory leak on mount failure
and found the following issues:
* SYZFAIL: failed to recv rpc
* WARNING: ODEBUG bug in hfsplus_kill_sb
* general protection fault in __timer_delete
* general protection fault in hfsplus_sync_fs
Full report is available here:
https://ci.syzbot.org/series/ea775ab1-67a5-4497-b4d6-8c7b2b7d90aa
***
SYZFAIL: failed to recv rpc
tree: torvalds
URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux
base: 2061f18ad76ecaddf8ed17df81b8611ea88dbddd
arch: amd64
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
config: https://ci.syzbot.org/builds/591f3943-d010-4b2d-a026-67cc75802376/config
C repro: https://ci.syzbot.org/findings/53a2b5e3-41ae-4650-9300-ec3fdd87f47a/c_repro
syz repro: https://ci.syzbot.org/findings/53a2b5e3-41ae-4650-9300-ec3fdd87f47a/syz_repro
SYZFAIL: failed to recv rpc
***
WARNING: ODEBUG bug in hfsplus_kill_sb
tree: torvalds
URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux
base: 2061f18ad76ecaddf8ed17df81b8611ea88dbddd
arch: amd64
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
config: https://ci.syzbot.org/builds/591f3943-d010-4b2d-a026-67cc75802376/config
C repro: https://ci.syzbot.org/findings/3c918e05-49e7-4855-bee1-5aafc9a5b5a4/c_repro
syz repro: https://ci.syzbot.org/findings/3c918e05-49e7-4855-bee1-5aafc9a5b5a4/syz_repro
------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff88810a17ea38 object type: timer_list hint: delayed_sync_fs+0x0/0xf0 fs/hfsplus/super.c:-1
WARNING: lib/debugobjects.c:615 at 0x0, CPU#1: syz-executor/5946
Modules linked in:
CPU: 1 UID: 0 PID: 5946 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:debug_print_object lib/debugobjects.c:612 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:1099 [inline]
RIP: 0010:debug_check_no_obj_freed+0x44a/0x550 lib/debugobjects.c:1129
Code: 89 44 24 20 e8 47 4a 92 fd 48 8b 44 24 20 4c 8b 4d 00 4c 89 ef 48 c7 c6 20 02 c0 8b 48 c7 c2 40 07 c0 8b 8b 0c 24 4d 89 f8 50 <67> 48 0f b9 3a 48 83 c4 08 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc
RSP: 0018:ffffc900032b7c18 EFLAGS: 00010246
RAX: ffffffff829ca540 RBX: ffffffff99a849a0 RCX: 0000000000000000
RDX: ffffffff8bc00740 RSI: ffffffff8bc00220 RDI: ffffffff8f8b7a70
RBP: ffffffff8b6d2540 R08: ffff88810a17ea38 R09: ffffffff8b6d36a0
R10: dffffc0000000000 R11: ffffffff81ae6210 R12: ffff88810a17ec00
R13: ffffffff8f8b7a70 R14: ffff88810a17e000 R15: ffff88810a17ea38
FS: 0000555587657500(0000) GS:ffff8882a9e8e000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b55b316738 CR3: 0000000175d56000 CR4: 00000000000006f0
Call Trace:
<TASK>
slab_free_hook mm/slub.c:2471 [inline]
slab_free mm/slub.c:6663 [inline]
kfree+0x13b/0x660 mm/slub.c:6871
hfsplus_kill_sb+0x72/0xb0 fs/hfsplus/super.c:717
deactivate_locked_super+0xbc/0x130 fs/super.c:474
cleanup_mnt+0x425/0x4c0 fs/namespace.c:1318
task_work_run+0x1d4/0x260 kernel/task_work.c:233
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
__exit_to_user_mode_loop kernel/entry/common.c:44 [inline]
exit_to_user_mode_loop+0xff/0x4f0 kernel/entry/common.c:75
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x2e3/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f540cf90af7
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffc80b82ab8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f540cfee72f RCX: 00007f540cf90af7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc80b82b70
RBP: 00007ffc80b82b70 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc80b83c00
R13: 00007f540cfee72f R14: 000000000001120e R15: 00007ffc80b83c40
</TASK>
----------------
Code disassembly (best guess):
0: 89 44 24 20 mov %eax,0x20(%rsp)
4: e8 47 4a 92 fd call 0xfd924a50
9: 48 8b 44 24 20 mov 0x20(%rsp),%rax
e: 4c 8b 4d 00 mov 0x0(%rbp),%r9
12: 4c 89 ef mov %r13,%rdi
15: 48 c7 c6 20 02 c0 8b mov $0xffffffff8bc00220,%rsi
1c: 48 c7 c2 40 07 c0 8b mov $0xffffffff8bc00740,%rdx
23: 8b 0c 24 mov (%rsp),%ecx
26: 4d 89 f8 mov %r15,%r8
29: 50 push %rax
* 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2f: 48 83 c4 08 add $0x8,%rsp
33: 4c 8b 6c 24 18 mov 0x18(%rsp),%r13
38: 48 rex.W
39: b9 00 00 00 00 mov $0x0,%ecx
3e: 00 fc add %bh,%ah
***
general protection fault in __timer_delete
tree: torvalds
URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux
base: 2061f18ad76ecaddf8ed17df81b8611ea88dbddd
arch: amd64
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
config: https://ci.syzbot.org/builds/591f3943-d010-4b2d-a026-67cc75802376/config
syz repro: https://ci.syzbot.org/findings/58118c78-00cf-40ba-b5b2-a878d7311794/syz_repro
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000048: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000240-0x0000000000000247]
CPU: 1 UID: 0 PID: 5944 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:timer_is_static_object+0x26/0x80 kernel/time/timer.c:691
Code: 90 90 90 90 f3 0f 1e fa 41 57 41 56 53 48 89 fb 49 bf 00 00 00 00 00 fc ff df e8 95 e8 12 00 4c 8d 73 08 4c 89 f0 48 c1 e8 03 <42> 80 3c 38 00 74 08 4c 89 f7 e8 8b e0 78 00 49 83 3e 00 74 09 e8
RSP: 0018:ffffc900044279a8 EFLAGS: 00010006
RAX: 0000000000000048 RBX: 0000000000000238 RCX: ffff88817417d7c0
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000238
RBP: ffffffff99a2bcc0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: ffffffff81ae62d0 R12: ffffffff8b6d2550
R13: fffffffffffffffe R14: 0000000000000240 R15: dffffc0000000000
FS: 000055555c51f500(0000) GS:ffff8882a9e8e000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd2077ec08 CR3: 00000001138de000 CR4: 00000000000006f0
Call Trace:
<TASK>
lookup_object_or_alloc lib/debugobjects.c:679 [inline]
debug_object_assert_init+0x16f/0x380 lib/debugobjects.c:1008
debug_timer_assert_init kernel/time/timer.c:803 [inline]
debug_assert_init kernel/time/timer.c:848 [inline]
__timer_delete+0x31/0x390 kernel/time/timer.c:1366
try_to_grab_pending kernel/workqueue.c:2061 [inline]
work_grab_pending+0x121/0x990 kernel/workqueue.c:2154
__cancel_work+0x85/0x2c0 kernel/workqueue.c:4368
__cancel_work_sync+0x1f/0x110 kernel/workqueue.c:4385
hfsplus_put_super+0x56/0x3e0 fs/hfsplus/super.c:328
generic_shutdown_super+0x135/0x2c0 fs/super.c:643
kill_block_super+0x44/0x90 fs/super.c:1730
deactivate_locked_super+0xbc/0x130 fs/super.c:474
cleanup_mnt+0x425/0x4c0 fs/namespace.c:1318
task_work_run+0x1d4/0x260 kernel/task_work.c:233
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
__exit_to_user_mode_loop kernel/entry/common.c:44 [inline]
exit_to_user_mode_loop+0xff/0x4f0 kernel/entry/common.c:75
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x2e3/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3b71f90af7
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd2077f3b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f3b71fee72f RCX: 00007f3b71f90af7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd2077f470
RBP: 00007ffd2077f470 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd20780500
R13: 00007f3b71fee72f R14: 000000000000f9eb R15: 00007ffd20780540
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:timer_is_static_object+0x26/0x80 kernel/time/timer.c:691
Code: 90 90 90 90 f3 0f 1e fa 41 57 41 56 53 48 89 fb 49 bf 00 00 00 00 00 fc ff df e8 95 e8 12 00 4c 8d 73 08 4c 89 f0 48 c1 e8 03 <42> 80 3c 38 00 74 08 4c 89 f7 e8 8b e0 78 00 49 83 3e 00 74 09 e8
RSP: 0018:ffffc900044279a8 EFLAGS: 00010006
RAX: 0000000000000048 RBX: 0000000000000238 RCX: ffff88817417d7c0
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000238
RBP: ffffffff99a2bcc0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: ffffffff81ae62d0 R12: ffffffff8b6d2550
R13: fffffffffffffffe R14: 0000000000000240 R15: dffffc0000000000
FS: 000055555c51f500(0000) GS:ffff8882a9e8e000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd2077ec08 CR3: 00000001138de000 CR4: 00000000000006f0
----------------
Code disassembly (best guess):
0: 90 nop
1: 90 nop
2: 90 nop
3: 90 nop
4: f3 0f 1e fa endbr64
8: 41 57 push %r15
a: 41 56 push %r14
c: 53 push %rbx
d: 48 89 fb mov %rdi,%rbx
10: 49 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%r15
17: fc ff df
1a: e8 95 e8 12 00 call 0x12e8b4
1f: 4c 8d 73 08 lea 0x8(%rbx),%r14
23: 4c 89 f0 mov %r14,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) <-- trapping instruction
2f: 74 08 je 0x39
31: 4c 89 f7 mov %r14,%rdi
34: e8 8b e0 78 00 call 0x78e0c4
39: 49 83 3e 00 cmpq $0x0,(%r14)
3d: 74 09 je 0x48
3f: e8 .byte 0xe8
***
general protection fault in hfsplus_sync_fs
tree: torvalds
URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux
base: 2061f18ad76ecaddf8ed17df81b8611ea88dbddd
arch: amd64
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
config: https://ci.syzbot.org/builds/591f3943-d010-4b2d-a026-67cc75802376/config
C repro: https://ci.syzbot.org/findings/990368ba-5843-438f-bf7c-132c134aa1f3/c_repro
syz repro: https://ci.syzbot.org/findings/990368ba-5843-438f-bf7c-132c134aa1f3/syz_repro
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f]
CPU: 0 UID: 0 PID: 5946 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:hfsplus_sync_fs+0x70/0x3d0 fs/hfsplus/super.c:255
Code: 31 ff 89 ee e8 31 a9 24 ff 85 ed 0f 84 71 01 00 00 4c 89 24 24 0f 1f 44 00 00 e8 db a4 24 ff 4d 8d 7e 28 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ff e8 d2 9c 8a ff 4d 8b 3f 49 83 c7 08 4c
RSP: 0018:ffffc900036e7a48 EFLAGS: 00010206
RAX: 0000000000000005 RBX: dffffc0000000000 RCX: ffff88810bbc57c0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffc900036e78a7 R09: 1ffff920006dcf14
R10: dffffc0000000000 R11: ffffffff829ca640 R12: ffff88811624e000
R13: ffff88811624e158 R14: 0000000000000000 R15: 0000000000000028
FS: 0000555564915500(0000) GS:ffff88818ea8e000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c00003e720 CR3: 0000000011796000 CR4: 00000000000006f0
Call Trace:
<TASK>
sync_filesystem+0x1cf/0x230 fs/sync.c:66
generic_shutdown_super+0x6f/0x2c0 fs/super.c:622
kill_block_super+0x44/0x90 fs/super.c:1730
deactivate_locked_super+0xbc/0x130 fs/super.c:474
cleanup_mnt+0x425/0x4c0 fs/namespace.c:1318
task_work_run+0x1d4/0x260 kernel/task_work.c:233
get_signal+0x11ec/0x1340 kernel/signal.c:2807
arch_do_signal_or_restart+0x9a/0x7a0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
exit_to_user_mode_loop+0x87/0x4f0 kernel/entry/common.c:75
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x2e3/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdd6ef90af7
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd2aacb428 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fdd6efee72f RCX: 00007fdd6ef90af7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd2aacb4e0
RBP: 00007ffd2aacb4e0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd2aacc570
R13: 00007fdd6efee72f R14: 000000000000febb R15: 00007ffd2aacc5b0
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:hfsplus_sync_fs+0x70/0x3d0 fs/hfsplus/super.c:255
Code: 31 ff 89 ee e8 31 a9 24 ff 85 ed 0f 84 71 01 00 00 4c 89 24 24 0f 1f 44 00 00 e8 db a4 24 ff 4d 8d 7e 28 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ff e8 d2 9c 8a ff 4d 8b 3f 49 83 c7 08 4c
RSP: 0018:ffffc900036e7a48 EFLAGS: 00010206
RAX: 0000000000000005 RBX: dffffc0000000000 RCX: ffff88810bbc57c0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffc900036e78a7 R09: 1ffff920006dcf14
R10: dffffc0000000000 R11: ffffffff829ca640 R12: ffff88811624e000
R13: ffff88811624e158 R14: 0000000000000000 R15: 0000000000000028
FS: 0000555564915500(0000) GS:ffff8882a9e8e000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ccfe37e9e0 CR3: 0000000011796000 CR4: 00000000000006f0
----------------
Code disassembly (best guess):
0: 31 ff xor %edi,%edi
2: 89 ee mov %ebp,%esi
4: e8 31 a9 24 ff call 0xff24a93a
9: 85 ed test %ebp,%ebp
b: 0f 84 71 01 00 00 je 0x182
11: 4c 89 24 24 mov %r12,(%rsp)
15: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
1a: e8 db a4 24 ff call 0xff24a4fa
1f: 4d 8d 7e 28 lea 0x28(%r14),%r15
23: 4c 89 f8 mov %r15,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) <-- trapping instruction
2e: 74 08 je 0x38
30: 4c 89 ff mov %r15,%rdi
33: e8 d2 9c 8a ff call 0xff8a9d0a
38: 4d 8b 3f mov (%r15),%r15
3b: 49 83 c7 08 add $0x8,%r15
3f: 4c rex.WR
***
If these findings have caused you to resend the series or submit a
separate fix, please add the following tag to your commit message:
Tested-by: syzbot@syzkaller.appspotmail.com
---
This report is generated by a bot. It may contain errors.
syzbot ci engineers can be reached at syzkaller@googlegroups.com.
prev parent reply other threads:[~2025-12-06 9:25 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-05 5:38 [syzbot] [hfs?] memory leak in hfsplus_init_fs_context syzbot
2025-12-05 6:28 ` Forwarded: [PATCH] hfsplus: fix memory leak in hfsplus_fill_super() error path syzbot
2025-12-05 7:51 ` syzbot
2025-12-05 12:43 ` syzbot
2025-12-05 14:48 ` syzbot
2025-12-06 0:09 ` [PATCH v1] hfsplus: fix memory leak on mount failure Swaraj Gaikwad
2025-12-05 19:06 ` [syzbot] [hfs?] memory leak in hfsplus_init_fs_context syzbot
2025-12-05 20:02 ` [PATCH v1] hfsplus: fix memory leak on mount failure Viacheslav Dubeyko
2025-12-06 9:25 ` syzbot ci [this message]
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