* [linux-next:master 12999/13245] mm/vmalloc.c:4652:25: warning: variable 'addr' is uninitialized when used here
@ 2024-01-11 5:13 kernel test robot
2024-01-11 15:38 ` Uladzislau Rezki
0 siblings, 1 reply; 3+ messages in thread
From: kernel test robot @ 2024-01-11 5:13 UTC (permalink / raw)
To: Uladzislau Rezki (Sony)
Cc: llvm, oe-kbuild-all, Linux Memory Management List, Andrew Morton
tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: 9e21984d62c56a0f6d1fc6f76b646212cfd7fe88
commit: e88b85b81d5313a69cb62829b957d4a9ecde600b [12999/13245] mm: vmalloc: offload free_vmap_area_lock lock
config: arm-defconfig (https://download.01.org/0day-ci/archive/20240111/202401111304.N5dkFGNe-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project.git f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240111/202401111304.N5dkFGNe-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202401111304.N5dkFGNe-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> mm/vmalloc.c:4652:25: warning: variable 'addr' is uninitialized when used here [-Wuninitialized]
va = __find_vmap_area(addr, &vn->busy.root);
^~~~
mm/vmalloc.c:4645:20: note: initialize the variable 'addr' to silence this warning
unsigned long addr;
^
= 0
1 warning generated.
vim +/addr +4652 mm/vmalloc.c
a10aa579878fc6 Christoph Lameter 2008-04-28 4637
5bb1bb353cfe34 Paul E. McKenney 2021-01-07 4638 #ifdef CONFIG_PRINTK
98f180837a896e Paul E. McKenney 2020-12-08 4639 bool vmalloc_dump_obj(void *object)
98f180837a896e Paul E. McKenney 2020-12-08 4640 {
98f180837a896e Paul E. McKenney 2020-12-08 4641 void *objp = (void *)PAGE_ALIGN((unsigned long)object);
0818e739b5c061 Joel Fernandes (Google 2023-09-04 4642) const void *caller;
0818e739b5c061 Joel Fernandes (Google 2023-09-04 4643) struct vmap_area *va;
86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4644) struct vmap_node *vn;
0818e739b5c061 Joel Fernandes (Google 2023-09-04 4645) unsigned long addr;
0818e739b5c061 Joel Fernandes (Google 2023-09-04 4646) unsigned int nr_pages;
86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4647) bool success = false;
98f180837a896e Paul E. McKenney 2020-12-08 4648
86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4649) vn = addr_to_node((unsigned long)objp);
86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4650)
86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4651) if (spin_trylock(&vn->busy.lock)) {
86817057732a9c Uladzislau Rezki (Sony 2024-01-02 @4652) va = __find_vmap_area(addr, &vn->busy.root);
86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4653)
86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4654) if (va && va->vm) {
86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4655) addr = (unsigned long)va->vm->addr;
86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4656) caller = va->vm->caller;
86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4657) nr_pages = va->vm->nr_pages;
86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4658) success = true;
0818e739b5c061 Joel Fernandes (Google 2023-09-04 4659) }
0818e739b5c061 Joel Fernandes (Google 2023-09-04 4660)
86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4661) spin_unlock(&vn->busy.lock);
0818e739b5c061 Joel Fernandes (Google 2023-09-04 4662) }
86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4663)
86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4664) if (success)
bd34dcd4120d7e Paul E. McKenney 2020-12-09 4665 pr_cont(" %u-page vmalloc region starting at %#lx allocated at %pS\n",
0818e739b5c061 Joel Fernandes (Google 2023-09-04 4666) nr_pages, addr, caller);
86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4667)
86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4668) return success;
98f180837a896e Paul E. McKenney 2020-12-08 4669 }
5bb1bb353cfe34 Paul E. McKenney 2021-01-07 4670 #endif
98f180837a896e Paul E. McKenney 2020-12-08 4671
:::::: The code at line 4652 was first introduced by commit
:::::: 86817057732a9ce9cefdb6f513b6554a55ebbbbb mm: vmalloc: remove global vmap_area_root rb-tree
:::::: TO: Uladzislau Rezki (Sony) <urezki@gmail.com>
:::::: CC: Andrew Morton <akpm@linux-foundation.org>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [linux-next:master 12999/13245] mm/vmalloc.c:4652:25: warning: variable 'addr' is uninitialized when used here
2024-01-11 5:13 [linux-next:master 12999/13245] mm/vmalloc.c:4652:25: warning: variable 'addr' is uninitialized when used here kernel test robot
@ 2024-01-11 15:38 ` Uladzislau Rezki
2024-01-11 16:11 ` Uladzislau Rezki
0 siblings, 1 reply; 3+ messages in thread
From: Uladzislau Rezki @ 2024-01-11 15:38 UTC (permalink / raw)
To: Andrew Morton
Cc: Uladzislau Rezki (Sony),
llvm, oe-kbuild-all, Linux Memory Management List, Andrew Morton
On Thu, Jan 11, 2024 at 01:13:59PM +0800, kernel test robot wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> head: 9e21984d62c56a0f6d1fc6f76b646212cfd7fe88
> commit: e88b85b81d5313a69cb62829b957d4a9ecde600b [12999/13245] mm: vmalloc: offload free_vmap_area_lock lock
> config: arm-defconfig (https://download.01.org/0day-ci/archive/20240111/202401111304.N5dkFGNe-lkp@intel.com/config)
> compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project.git f28c006a5895fc0e329fe15fead81e37457cb1d1)
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240111/202401111304.N5dkFGNe-lkp@intel.com/reproduce)
>
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@intel.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202401111304.N5dkFGNe-lkp@intel.com/
>
> All warnings (new ones prefixed by >>):
>
> >> mm/vmalloc.c:4652:25: warning: variable 'addr' is uninitialized when used here [-Wuninitialized]
> va = __find_vmap_area(addr, &vn->busy.root);
> ^~~~
> mm/vmalloc.c:4645:20: note: initialize the variable 'addr' to silence this warning
> unsigned long addr;
> ^
> = 0
> 1 warning generated.
>
>
> vim +/addr +4652 mm/vmalloc.c
>
> a10aa579878fc6 Christoph Lameter 2008-04-28 4637
> 5bb1bb353cfe34 Paul E. McKenney 2021-01-07 4638 #ifdef CONFIG_PRINTK
> 98f180837a896e Paul E. McKenney 2020-12-08 4639 bool vmalloc_dump_obj(void *object)
> 98f180837a896e Paul E. McKenney 2020-12-08 4640 {
> 98f180837a896e Paul E. McKenney 2020-12-08 4641 void *objp = (void *)PAGE_ALIGN((unsigned long)object);
> 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4642) const void *caller;
> 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4643) struct vmap_area *va;
> 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4644) struct vmap_node *vn;
> 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4645) unsigned long addr;
> 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4646) unsigned int nr_pages;
> 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4647) bool success = false;
> 98f180837a896e Paul E. McKenney 2020-12-08 4648
> 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4649) vn = addr_to_node((unsigned long)objp);
> 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4650)
> 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4651) if (spin_trylock(&vn->busy.lock)) {
> 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 @4652) va = __find_vmap_area(addr, &vn->busy.root);
> 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4653)
> 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4654) if (va && va->vm) {
> 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4655) addr = (unsigned long)va->vm->addr;
> 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4656) caller = va->vm->caller;
> 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4657) nr_pages = va->vm->nr_pages;
> 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4658) success = true;
> 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4659) }
> 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4660)
> 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4661) spin_unlock(&vn->busy.lock);
> 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4662) }
> 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4663)
> 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4664) if (success)
> bd34dcd4120d7e Paul E. McKenney 2020-12-09 4665 pr_cont(" %u-page vmalloc region starting at %#lx allocated at %pS\n",
> 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4666) nr_pages, addr, caller);
> 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4667)
> 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4668) return success;
> 98f180837a896e Paul E. McKenney 2020-12-08 4669 }
> 5bb1bb353cfe34 Paul E. McKenney 2021-01-07 4670 #endif
> 98f180837a896e Paul E. McKenney 2020-12-08 4671
>
> :::::: The code at line 4652 was first introduced by commit
> :::::: 86817057732a9ce9cefdb6f513b6554a55ebbbbb mm: vmalloc: remove global vmap_area_root rb-tree
>
> :::::: TO: Uladzislau Rezki (Sony) <urezki@gmail.com>
> :::::: CC: Andrew Morton <akpm@linux-foundation.org>
>
> --
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki
Same, i sent the patch, but just in case i post it here:
<snip>
From fa613edf6c3d700a02ef109cbd42633b5df30abb Mon Sep 17 00:00:00 2001
From: "Uladzislau Rezki (Sony)" <urezki@gmail.com>
Date: Thu, 11 Jan 2024 13:04:07 +0100
Subject: [PATCH 1/2] mm: vmalloc: Fix a wrong value passed to
__find_vmap_area()
There was a type in the vmalloc_dump_obj() function. Instead
of passing a real address which is "objp" an "addr" was used
what is wrong and not initialized.
Reported-by: kernel test robot <lkp@intel.com>
Fixes: e88b85b81d5 ("mm: vmalloc: offload free_vmap_area_lock lock")
Closes: https://lore.kernel.org/oe-kbuild-all/202401111810.TKPIXLCs-lkp@intel.com/
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
---
mm/vmalloc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index e30dabf68263..43a6608e1397 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -4688,7 +4688,7 @@ bool vmalloc_dump_obj(void *object)
vn = addr_to_node((unsigned long)objp);
if (spin_trylock(&vn->busy.lock)) {
- va = __find_vmap_area(addr, &vn->busy.root);
+ va = __find_vmap_area((unsigned long)objp, &vn->busy.root);
if (va && va->vm) {
addr = (unsigned long)va->vm->addr;
--
2.39.2
<snip>
it can be folded into: e88b85b81d5 ("mm: vmalloc: offload free_vmap_area_lock lock")
or applied as a separate patch.
--
Uladzislau Rezki
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [linux-next:master 12999/13245] mm/vmalloc.c:4652:25: warning: variable 'addr' is uninitialized when used here
2024-01-11 15:38 ` Uladzislau Rezki
@ 2024-01-11 16:11 ` Uladzislau Rezki
0 siblings, 0 replies; 3+ messages in thread
From: Uladzislau Rezki @ 2024-01-11 16:11 UTC (permalink / raw)
To: Andrew Morton
Cc: Andrew Morton, llvm, oe-kbuild-all, Linux Memory Management List
On Thu, Jan 11, 2024 at 04:38:01PM +0100, Uladzislau Rezki wrote:
> On Thu, Jan 11, 2024 at 01:13:59PM +0800, kernel test robot wrote:
> > tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> > head: 9e21984d62c56a0f6d1fc6f76b646212cfd7fe88
> > commit: e88b85b81d5313a69cb62829b957d4a9ecde600b [12999/13245] mm: vmalloc: offload free_vmap_area_lock lock
> > config: arm-defconfig (https://download.01.org/0day-ci/archive/20240111/202401111304.N5dkFGNe-lkp@intel.com/config)
> > compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project.git f28c006a5895fc0e329fe15fead81e37457cb1d1)
> > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240111/202401111304.N5dkFGNe-lkp@intel.com/reproduce)
> >
> > If you fix the issue in a separate patch/commit (i.e. not just a new version of
> > the same patch/commit), kindly add following tags
> > | Reported-by: kernel test robot <lkp@intel.com>
> > | Closes: https://lore.kernel.org/oe-kbuild-all/202401111304.N5dkFGNe-lkp@intel.com/
> >
> > All warnings (new ones prefixed by >>):
> >
> > >> mm/vmalloc.c:4652:25: warning: variable 'addr' is uninitialized when used here [-Wuninitialized]
> > va = __find_vmap_area(addr, &vn->busy.root);
> > ^~~~
> > mm/vmalloc.c:4645:20: note: initialize the variable 'addr' to silence this warning
> > unsigned long addr;
> > ^
> > = 0
> > 1 warning generated.
> >
> >
> > vim +/addr +4652 mm/vmalloc.c
> >
> > a10aa579878fc6 Christoph Lameter 2008-04-28 4637
> > 5bb1bb353cfe34 Paul E. McKenney 2021-01-07 4638 #ifdef CONFIG_PRINTK
> > 98f180837a896e Paul E. McKenney 2020-12-08 4639 bool vmalloc_dump_obj(void *object)
> > 98f180837a896e Paul E. McKenney 2020-12-08 4640 {
> > 98f180837a896e Paul E. McKenney 2020-12-08 4641 void *objp = (void *)PAGE_ALIGN((unsigned long)object);
> > 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4642) const void *caller;
> > 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4643) struct vmap_area *va;
> > 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4644) struct vmap_node *vn;
> > 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4645) unsigned long addr;
> > 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4646) unsigned int nr_pages;
> > 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4647) bool success = false;
> > 98f180837a896e Paul E. McKenney 2020-12-08 4648
> > 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4649) vn = addr_to_node((unsigned long)objp);
> > 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4650)
> > 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4651) if (spin_trylock(&vn->busy.lock)) {
> > 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 @4652) va = __find_vmap_area(addr, &vn->busy.root);
> > 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4653)
> > 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4654) if (va && va->vm) {
> > 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4655) addr = (unsigned long)va->vm->addr;
> > 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4656) caller = va->vm->caller;
> > 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4657) nr_pages = va->vm->nr_pages;
> > 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4658) success = true;
> > 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4659) }
> > 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4660)
> > 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4661) spin_unlock(&vn->busy.lock);
> > 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4662) }
> > 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4663)
> > 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4664) if (success)
> > bd34dcd4120d7e Paul E. McKenney 2020-12-09 4665 pr_cont(" %u-page vmalloc region starting at %#lx allocated at %pS\n",
> > 0818e739b5c061 Joel Fernandes (Google 2023-09-04 4666) nr_pages, addr, caller);
> > 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4667)
> > 86817057732a9c Uladzislau Rezki (Sony 2024-01-02 4668) return success;
> > 98f180837a896e Paul E. McKenney 2020-12-08 4669 }
> > 5bb1bb353cfe34 Paul E. McKenney 2021-01-07 4670 #endif
> > 98f180837a896e Paul E. McKenney 2020-12-08 4671
> >
> > :::::: The code at line 4652 was first introduced by commit
> > :::::: 86817057732a9ce9cefdb6f513b6554a55ebbbbb mm: vmalloc: remove global vmap_area_root rb-tree
> >
> > :::::: TO: Uladzislau Rezki (Sony) <urezki@gmail.com>
> > :::::: CC: Andrew Morton <akpm@linux-foundation.org>
> >
> > --
> > 0-DAY CI Kernel Test Service
> > https://github.com/intel/lkp-tests/wiki
>
> Same, i sent the patch, but just in case i post it here:
>
> <snip>
> From fa613edf6c3d700a02ef109cbd42633b5df30abb Mon Sep 17 00:00:00 2001
> From: "Uladzislau Rezki (Sony)" <urezki@gmail.com>
> Date: Thu, 11 Jan 2024 13:04:07 +0100
> Subject: [PATCH 1/2] mm: vmalloc: Fix a wrong value passed to
> __find_vmap_area()
>
> There was a type in the vmalloc_dump_obj() function. Instead
> of passing a real address which is "objp" an "addr" was used
> what is wrong and not initialized.
>
> Reported-by: kernel test robot <lkp@intel.com>
> Fixes: e88b85b81d5 ("mm: vmalloc: offload free_vmap_area_lock lock")
> Closes: https://lore.kernel.org/oe-kbuild-all/202401111810.TKPIXLCs-lkp@intel.com/
> Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
> ---
> mm/vmalloc.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/mm/vmalloc.c b/mm/vmalloc.c
> index e30dabf68263..43a6608e1397 100644
> --- a/mm/vmalloc.c
> +++ b/mm/vmalloc.c
> @@ -4688,7 +4688,7 @@ bool vmalloc_dump_obj(void *object)
> vn = addr_to_node((unsigned long)objp);
>
> if (spin_trylock(&vn->busy.lock)) {
> - va = __find_vmap_area(addr, &vn->busy.root);
> + va = __find_vmap_area((unsigned long)objp, &vn->busy.root);
>
> if (va && va->vm) {
> addr = (unsigned long)va->vm->addr;
> --
> 2.39.2
> <snip>
>
> it can be folded into: e88b85b81d5 ("mm: vmalloc: offload free_vmap_area_lock lock")
> or applied as a separate patch.
>
Wrong "Fixes" tag. Please see updated version:
<snip>
From 98f1fd2d3913f3b7bcbe49785a78f67999151f1c Mon Sep 17 00:00:00 2001
From: "Uladzislau Rezki (Sony)" <urezki@gmail.com>
Date: Thu, 11 Jan 2024 13:04:07 +0100
Subject: [PATCH 1/2] mm: vmalloc: Fix a wrong value passed to
__find_vmap_area()
There was a type in the vmalloc_dump_obj() function. Instead
of passing a real address which is "objp" an "addr" was used
what is wrong and not initialized.
Reported-by: kernel test robot <lkp@intel.com>
Fixes: 86817057732a ("mm: vmalloc: remove global vmap_area_root rb-tree")
Closes: https://lore.kernel.org/oe-kbuild-all/202401111810.TKPIXLCs-lkp@intel.com/
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
---
mm/vmalloc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index e30dabf68263..43a6608e1397 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -4688,7 +4688,7 @@ bool vmalloc_dump_obj(void *object)
vn = addr_to_node((unsigned long)objp);
if (spin_trylock(&vn->busy.lock)) {
- va = __find_vmap_area(addr, &vn->busy.root);
+ va = __find_vmap_area((unsigned long)objp, &vn->busy.root);
if (va && va->vm) {
addr = (unsigned long)va->vm->addr;
--
2.39.2
<snip>
^ permalink raw reply [flat|nested] 3+ messages in thread
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2024-01-11 5:13 [linux-next:master 12999/13245] mm/vmalloc.c:4652:25: warning: variable 'addr' is uninitialized when used here kernel test robot
2024-01-11 15:38 ` Uladzislau Rezki
2024-01-11 16:11 ` Uladzislau Rezki
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