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[PATCH AUTOSEL 4.19 03/29] drm/amd/amdgpu/amdgpu_cs: fix refcount leak of a dma_fence obj

by Sasha Levin

From: Xin Xiong <xiongx18(a)fudan.edu.cn> [ Upstream commit dfced44f122c500004a48ecc8db516bb6a295a1b ] This issue takes place in an error path in amdgpu_cs_fence_to_handle_ioctl(). When `info->in.what` falls into default case, the function simply returns -EINVAL, forgetting to decrement the reference count of a dma_fence obj, which is bumped earlier by amdgpu_cs_get_fence(). This may result in reference count leaks. Fix it by decreasing the refcount of specific object before returning the error code. Reviewed-by: Christian König <christian.koenig(a)amd.com> Signed-off-by: Xin Xiong <xiongx18(a)fudan.edu.cn> Signed-off-by: Xin Tan <tanxin.ctf(a)gmail.com> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c index 81001d879322..023309296bfc 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c @@ -1469,6 +1469,7 @@ int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, void *data, return 0; default: + dma_fence_put(fence); return -EINVAL; } } -- 2.34.1

4 years, 6 months

[PATCH AUTOSEL 5.4 03/37] drm/amd/amdgpu/amdgpu_cs: fix refcount leak of a dma_fence obj

by Sasha Levin

From: Xin Xiong <xiongx18(a)fudan.edu.cn> [ Upstream commit dfced44f122c500004a48ecc8db516bb6a295a1b ] This issue takes place in an error path in amdgpu_cs_fence_to_handle_ioctl(). When `info->in.what` falls into default case, the function simply returns -EINVAL, forgetting to decrement the reference count of a dma_fence obj, which is bumped earlier by amdgpu_cs_get_fence(). This may result in reference count leaks. Fix it by decreasing the refcount of specific object before returning the error code. Reviewed-by: Christian König <christian.koenig(a)amd.com> Signed-off-by: Xin Xiong <xiongx18(a)fudan.edu.cn> Signed-off-by: Xin Tan <tanxin.ctf(a)gmail.com> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c index 82823d9a8ba8..fddeea2b17e5 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c @@ -1542,6 +1542,7 @@ int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, void *data, return 0; default: + dma_fence_put(fence); return -EINVAL; } } -- 2.34.1

4 years, 6 months

[PATCH AUTOSEL 5.10 04/65] drm/amd/amdgpu/amdgpu_cs: fix refcount leak of a dma_fence obj

by Sasha Levin

From: Xin Xiong <xiongx18(a)fudan.edu.cn> [ Upstream commit dfced44f122c500004a48ecc8db516bb6a295a1b ] This issue takes place in an error path in amdgpu_cs_fence_to_handle_ioctl(). When `info->in.what` falls into default case, the function simply returns -EINVAL, forgetting to decrement the reference count of a dma_fence obj, which is bumped earlier by amdgpu_cs_get_fence(). This may result in reference count leaks. Fix it by decreasing the refcount of specific object before returning the error code. Reviewed-by: Christian König <christian.koenig(a)amd.com> Signed-off-by: Xin Xiong <xiongx18(a)fudan.edu.cn> Signed-off-by: Xin Tan <tanxin.ctf(a)gmail.com> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c index 12598a4b5c78..867fcee6b0d3 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c @@ -1484,6 +1484,7 @@ int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, void *data, return 0; default: + dma_fence_put(fence); return -EINVAL; } } -- 2.34.1

4 years, 6 months

[PATCH AUTOSEL 5.15 04/98] drm/amd/amdgpu/amdgpu_cs: fix refcount leak of a dma_fence obj

by Sasha Levin

From: Xin Xiong <xiongx18(a)fudan.edu.cn> [ Upstream commit dfced44f122c500004a48ecc8db516bb6a295a1b ] This issue takes place in an error path in amdgpu_cs_fence_to_handle_ioctl(). When `info->in.what` falls into default case, the function simply returns -EINVAL, forgetting to decrement the reference count of a dma_fence obj, which is bumped earlier by amdgpu_cs_get_fence(). This may result in reference count leaks. Fix it by decreasing the refcount of specific object before returning the error code. Reviewed-by: Christian König <christian.koenig(a)amd.com> Signed-off-by: Xin Xiong <xiongx18(a)fudan.edu.cn> Signed-off-by: Xin Tan <tanxin.ctf(a)gmail.com> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c index 913f9eaa9cd6..aa823f154199 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c @@ -1508,6 +1508,7 @@ int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, void *data, return 0; default: + dma_fence_put(fence); return -EINVAL; } } -- 2.34.1

4 years, 6 months

[PATCH AUTOSEL 5.16 007/109] drm/amd/amdgpu/amdgpu_cs: fix refcount leak of a dma_fence obj

by Sasha Levin

From: Xin Xiong <xiongx18(a)fudan.edu.cn> [ Upstream commit dfced44f122c500004a48ecc8db516bb6a295a1b ] This issue takes place in an error path in amdgpu_cs_fence_to_handle_ioctl(). When `info->in.what` falls into default case, the function simply returns -EINVAL, forgetting to decrement the reference count of a dma_fence obj, which is bumped earlier by amdgpu_cs_get_fence(). This may result in reference count leaks. Fix it by decreasing the refcount of specific object before returning the error code. Reviewed-by: Christian König <christian.koenig(a)amd.com> Signed-off-by: Xin Xiong <xiongx18(a)fudan.edu.cn> Signed-off-by: Xin Tan <tanxin.ctf(a)gmail.com> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c index 0311d799a010..894869789041 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c @@ -1510,6 +1510,7 @@ int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, void *data, return 0; default: + dma_fence_put(fence); return -EINVAL; } } -- 2.34.1

4 years, 6 months

[PATCH AUTOSEL 5.17 011/149] drm/amd/amdgpu/amdgpu_cs: fix refcount leak of a dma_fence obj

by Sasha Levin

From: Xin Xiong <xiongx18(a)fudan.edu.cn> [ Upstream commit dfced44f122c500004a48ecc8db516bb6a295a1b ] This issue takes place in an error path in amdgpu_cs_fence_to_handle_ioctl(). When `info->in.what` falls into default case, the function simply returns -EINVAL, forgetting to decrement the reference count of a dma_fence obj, which is bumped earlier by amdgpu_cs_get_fence(). This may result in reference count leaks. Fix it by decreasing the refcount of specific object before returning the error code. Reviewed-by: Christian König <christian.koenig(a)amd.com> Signed-off-by: Xin Xiong <xiongx18(a)fudan.edu.cn> Signed-off-by: Xin Tan <tanxin.ctf(a)gmail.com> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c index 06d07502a1f6..a34be65c9eaa 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c @@ -1509,6 +1509,7 @@ int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, void *data, return 0; default: + dma_fence_put(fence); return -EINVAL; } } -- 2.34.1

4 years, 6 months

[PATCH v2 00/12] iio: buffer-dma: write() and new DMABUF based API

by Paul Cercueil

Hi Jonathan, This is the V2 of my patchset that introduces a new userspace interface based on DMABUF objects to complement the fileio API, and adds write() support to the existing fileio API. Changes since v1: - the patches that were merged in v1 have been (obviously) dropped from this patchset; - the patch that was setting the write-combine cache setting has been dropped as well, as it was simply not useful. - [01/12]: * Only remove the outgoing queue, and keep the incoming queue, as we want the buffer to start streaming data as soon as it is enabled. * Remove IIO_BLOCK_STATE_DEQUEUED, since it is now functionally the same as IIO_BLOCK_STATE_DONE. - [02/12]: * Fix block->state not being reset in iio_dma_buffer_request_update() for output buffers. * Only update block->bytes_used once and add a comment about why we update it. * Add a comment about why we're setting a different state for output buffers in iio_dma_buffer_request_update() * Remove useless cast to bool (!!) in iio_dma_buffer_io() - [05/12]: Only allow the new IOCTLs on the buffer FD created with IIO_BUFFER_GET_FD_IOCTL(). - [12/12]: * Explicitly state that the new interface is optional and is not implemented by all drivers. * The IOCTLs can now only be called on the buffer FD returned by IIO_BUFFER_GET_FD_IOCTL. * Move the page up a bit in the index since it is core stuff and not driver-specific. The patches not listed here have not been modified since v1. Cheers, -Paul Alexandru Ardelean (1): iio: buffer-dma: split iio_dma_buffer_fileio_free() function Paul Cercueil (11): iio: buffer-dma: Get rid of outgoing queue iio: buffer-dma: Enable buffer write support iio: buffer-dmaengine: Support specifying buffer direction iio: buffer-dmaengine: Enable write support iio: core: Add new DMABUF interface infrastructure iio: buffer-dma: Use DMABUFs instead of custom solution iio: buffer-dma: Implement new DMABUF based userspace API iio: buffer-dmaengine: Support new DMABUF based userspace API iio: core: Add support for cyclic buffers iio: buffer-dmaengine: Add support for cyclic buffers Documentation: iio: Document high-speed DMABUF based API Documentation/driver-api/dma-buf.rst | 2 + Documentation/iio/dmabuf_api.rst | 94 +++ Documentation/iio/index.rst | 2 + drivers/iio/adc/adi-axi-adc.c | 3 +- drivers/iio/buffer/industrialio-buffer-dma.c | 610 ++++++++++++++---- .../buffer/industrialio-buffer-dmaengine.c | 42 +- drivers/iio/industrialio-buffer.c | 60 ++ include/linux/iio/buffer-dma.h | 38 +- include/linux/iio/buffer-dmaengine.h | 5 +- include/linux/iio/buffer_impl.h | 8 + include/uapi/linux/iio/buffer.h | 30 + 11 files changed, 749 insertions(+), 145 deletions(-) create mode 100644 Documentation/iio/dmabuf_api.rst -- 2.34.1

4 years, 6 months

[syzbot] general protection fault in dma_fence_array_first

by syzbot

Hello, syzbot found the following issue on: HEAD commit: 8515d05bf6bc Add linux-next specific files for 20220328 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=1694e21b700000 kernel config: https://syzkaller.appspot.com/x/.config?x=530c68bef4e2b8a8 dashboard link: https://syzkaller.appspot.com/bug?extid=5c943fe38e86d615cac2 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1467313b700000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=121b7cb9700000 The issue was bisected to: commit 519f490db07e1a539490612f376487f61e48e39c Author: Christian König <christian.koenig(a)amd.com> Date: Fri Mar 11 09:32:26 2022 +0000 dma-buf/sync-file: fix warning about fence containers bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1058277d700000 final oops: https://syzkaller.appspot.com/x/report.txt?x=1258277d700000 console output: https://syzkaller.appspot.com/x/log.txt?x=1458277d700000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5c943fe38e86d615cac2(a)syzkaller.appspotmail.com Fixes: 519f490db07e ("dma-buf/sync-file: fix warning about fence containers") general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] CPU: 1 PID: 3595 Comm: syz-executor814 Not tainted 5.17.0-next-20220328-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:dma_fence_array_first+0x78/0xb0 drivers/dma-buf/dma-fence-array.c:234 Code: 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 43 48 8b 9b 88 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 75 1b 4c 8b 23 e8 fa a9 e0 fc 4c 89 e0 5b 41 5c c3 45 RSP: 0018:ffffc90003a4fd48 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000010 RCX: 0000000000000000 RDX: 0000000000000002 RSI: ffffffff84980052 RDI: ffff888015c76388 RBP: ffff888015c76300 R08: 0000000000000000 R09: ffff888015c7633b R10: ffffffff8498f6ba R11: 0000000000000000 R12: ffff888015c76300 R13: ffff888015c76690 R14: 00000000c0383e04 R15: 0000000020001840 FS: 0000555556872300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020001528 CR3: 000000001e82f000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> __dma_fence_unwrap_array include/linux/dma-fence-unwrap.h:42 [inline] dma_fence_unwrap_first include/linux/dma-fence-unwrap.h:57 [inline] sync_file_ioctl_fence_info drivers/dma-buf/sync_file.c:414 [inline] sync_file_ioctl+0x248/0x22c0 drivers/dma-buf/sync_file.c:477 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f6aae8951b9 Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffedd290238 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f6aae8951b9 RDX: 0000000020001840 RSI: 00000000c0383e04 RDI: 0000000000000007 RBP: 00007f6aae8591a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6aae859230 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:dma_fence_array_first+0x78/0xb0 drivers/dma-buf/dma-fence-array.c:234 Code: 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 43 48 8b 9b 88 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 75 1b 4c 8b 23 e8 fa a9 e0 fc 4c 89 e0 5b 41 5c c3 45 RSP: 0018:ffffc90003a4fd48 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000010 RCX: 0000000000000000 RDX: 0000000000000002 RSI: ffffffff84980052 RDI: ffff888015c76388 RBP: ffff888015c76300 R08: 0000000000000000 R09: ffff888015c7633b R10: ffffffff8498f6ba R11: 0000000000000000 R12: ffff888015c76300 R13: ffff888015c76690 R14: 00000000c0383e04 R15: 0000000020001840 FS: 0000555556872300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020001528 CR3: 000000001e82f000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 4 bytes skipped: 0: df 48 89 fisttps -0x77(%rax) 3: fa cli 4: 48 c1 ea 03 shr $0x3,%rdx 8: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) c: 75 43 jne 0x51 e: 48 8b 9b 88 00 00 00 mov 0x88(%rbx),%rbx 15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1c: fc ff df 1f: 48 89 da mov %rbx,%rdx 22: 48 c1 ea 03 shr $0x3,%rdx * 26: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2a: 75 1b jne 0x47 2c: 4c 8b 23 mov (%rbx),%r12 2f: e8 fa a9 e0 fc callq 0xfce0aa2e 34: 4c 89 e0 mov %r12,%rax 37: 5b pop %rbx 38: 41 5c pop %r12 3a: c3 retq 3b: 45 rex.RB --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller(a)googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches

4 years, 6 months

Re: [PATCH 1/2] dma-buf/sync-file: fix logic error in new fence merge code

by nirmoy.das＠linux.intel.com

The content of this message was lost. It was probably cross-posted to multiple lists and previously handled on another list.

4 years, 6 months

[PATCH next,v2] kernel: Add 1 ms delay to init handler to fix s3 resume hang

by Zhenneng Li

This is a workaround for s3 resume hang for r7 340(amdgpu). When we test s3 with r7 340 on arm64 platform, graphics card will hang up, the error message are as follows: Mar 4 01:14:11 greatwall-GW-XXXXXX-XXX kernel: [ 1.599374][ 7] [ T291] amdgpu 0000:02:00.0: fb0: amdgpudrmfb frame buffer device Mar 4 01:14:11 greatwall-GW-XXXXXX-XXX kernel: [ 1.612869][ 7] [ T291] [drm:amdgpu_device_ip_late_init [amdgpu]] *ERROR* late_init of IP block <si_dpm> failed -22 Mar 4 01:14:11 greatwall-GW-XXXXXX-XXX kernel: [ 1.623392][ 7] [ T291] amdgpu 0000:02:00.0: amdgpu_device_ip_late_init failed Mar 4 01:14:11 greatwall-GW-XXXXXX-XXX kernel: [ 1.630696][ 7] [ T291] amdgpu 0000:02:00.0: Fatal error during GPU init Mar 4 01:14:11 greatwall-GW-XXXXXX-XXX kernel: [ 1.637477][ 7] [ T291] [drm] amdgpu: finishing device. On the following hardware: lspci -nn -s 05:00.0 05:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Oland [Radeon HD 8570 / R7 240/340 / Radeon 520 OEM] [1002:6611] (rev 87) Signed-off-by: Zhenneng Li <lizhenneng(a)kylinos.cn> --- drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index 3987ecb24ef4..1eced991b5b2 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -2903,6 +2903,8 @@ static void amdgpu_device_delayed_init_work_handler(struct work_struct *work) container_of(work, struct amdgpu_device, delayed_init_work.work); int r; + mdelay(1); + r = amdgpu_ib_ring_tests(adev); if (r) DRM_ERROR("ib ring test failed (%d).\n", r); -- 2.25.1

4 years, 6 months

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