From: Christoph Hellwig <hch@lst.de>
To: syzbot <syzbot+10e27961f4da37c443b2@syzkaller.appspotmail.com>
Cc: christian.koenig@amd.com, dri-devel@lists.freedesktop.org,
hch@lst.de, iommu@lists.linux-foundation.org,
linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org,
linux-media@vger.kernel.org, m.szyprowski@samsung.com,
robin.murphy@arm.com, sumit.semwal@linaro.org,
syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] WARNING in __dma_map_sg_attrs
Date: Thu, 2 Dec 2021 07:55:32 +0100 [thread overview]
Message-ID: <20211202065532.GA14627@lst.de> (raw)
In-Reply-To: <000000000000f0196305d219b2fe@google.com>
This means the virtgpu driver uses dma mapping helpers but has not set up
a DMA mask (which most likely suggests it is some kind of virtual device).
On Wed, Dec 01, 2021 at 10:18:21AM -0800, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: c5c17547b778 Merge tag 'net-5.16-rc3' of git://git.kernel...
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=13a73609b00000
> kernel config: https://syzkaller.appspot.com/x/.config?x=bf85c53718a1e697
> dashboard link: https://syzkaller.appspot.com/bug?extid=10e27961f4da37c443b2
> compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
>
> Unfortunately, I don't have any reproducer for this issue yet.
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+10e27961f4da37c443b2@syzkaller.appspotmail.com
>
> ------------[ cut here ]------------
> WARNING: CPU: 2 PID: 17169 at kernel/dma/mapping.c:188 __dma_map_sg_attrs+0x181/0x1f0 kernel/dma/mapping.c:188
> Modules linked in:
> CPU: 0 PID: 17169 Comm: syz-executor.3 Not tainted 5.16.0-rc2-syzkaller #0
> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
> RIP: 0010:__dma_map_sg_attrs+0x181/0x1f0 kernel/dma/mapping.c:188
> Code: 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 71 4c 8b 3d 70 6d b1 0d e9 db fe ff ff e8 86 ff 12 00 0f 0b e8 7f ff 12 00 <0f> 0b 45 31 e4 e9 54 ff ff ff e8 70 ff 12 00 49 8d 7f 50 48 b8 00
> RSP: 0018:ffffc90002c0fb20 EFLAGS: 00010216
> RAX: 0000000000013018 RBX: 0000000000000020 RCX: ffffc900037d4000
> RDX: 0000000000040000 RSI: ffffffff8163d361 RDI: ffff8880182ae4d0
> RBP: ffff8880182ae088 R08: 0000000000000002 R09: ffff888017ba054f
> R10: ffffffff8163d242 R11: 000000000008808a R12: 0000000000000000
> R13: ffff888024ca5700 R14: 0000000000000001 R15: 0000000000000000
> FS: 00007fa269e34700(0000) GS:ffff88802cb00000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 000000000040c120 CR3: 000000006c77c000 CR4: 0000000000150ee0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> Call Trace:
> <TASK>
> dma_map_sgtable+0x70/0xf0 kernel/dma/mapping.c:264
> drm_gem_map_dma_buf+0x12a/0x1e0 drivers/gpu/drm/drm_prime.c:633
> __map_dma_buf drivers/dma-buf/dma-buf.c:675 [inline]
> dma_buf_map_attachment+0x39a/0x5b0 drivers/dma-buf/dma-buf.c:954
> drm_gem_prime_import_dev.part.0+0x85/0x220 drivers/gpu/drm/drm_prime.c:939
> drm_gem_prime_import_dev drivers/gpu/drm/drm_prime.c:982 [inline]
> drm_gem_prime_import+0xc8/0x200 drivers/gpu/drm/drm_prime.c:982
> virtgpu_gem_prime_import+0x49/0x150 drivers/gpu/drm/virtio/virtgpu_prime.c:166
> drm_gem_prime_fd_to_handle+0x21d/0x550 drivers/gpu/drm/drm_prime.c:318
> drm_prime_fd_to_handle_ioctl+0x9b/0xd0 drivers/gpu/drm/drm_prime.c:374
> drm_ioctl_kernel+0x27d/0x4e0 drivers/gpu/drm/drm_ioctl.c:782
> drm_ioctl+0x51e/0x9d0 drivers/gpu/drm/drm_ioctl.c:885
> vfs_ioctl fs/ioctl.c:51 [inline]
> __do_sys_ioctl fs/ioctl.c:874 [inline]
> __se_sys_ioctl fs/ioctl.c:860 [inline]
> __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
> do_syscall_x64 arch/x86/entry/common.c:50 [inline]
> do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
> entry_SYSCALL_64_after_hwframe+0x44/0xae
> RIP: 0033:0x7fa26c8beae9
> 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 bc ff ff ff f7 d8 64 89 01 48
> RSP: 002b:00007fa269e34188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
> RAX: ffffffffffffffda RBX: 00007fa26c9d1f60 RCX: 00007fa26c8beae9
> RDX: 00000000200004c0 RSI: 00000000c00c642e RDI: 0000000000000005
> RBP: 00007fa26c918f6d R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
> R13: 00007ffc0019c51f R14: 00007fa269e34300 R15: 0000000000022000
> </TASK>
>
>
> ---
> 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@googlegroups.com.
>
> syzbot will keep track of this issue. See:
> https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
---end quoted text---
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: syzbot <syzbot+10e27961f4da37c443b2@syzkaller.appspotmail.com>
Cc: sumit.semwal@linaro.org, syzkaller-bugs@googlegroups.com,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
hch@lst.de, linaro-mm-sig@lists.linaro.org,
iommu@lists.linux-foundation.org, robin.murphy@arm.com,
christian.koenig@amd.com, linux-media@vger.kernel.org
Subject: Re: [syzbot] WARNING in __dma_map_sg_attrs
Date: Thu, 2 Dec 2021 07:55:32 +0100 [thread overview]
Message-ID: <20211202065532.GA14627@lst.de> (raw)
In-Reply-To: <000000000000f0196305d219b2fe@google.com>
This means the virtgpu driver uses dma mapping helpers but has not set up
a DMA mask (which most likely suggests it is some kind of virtual device).
On Wed, Dec 01, 2021 at 10:18:21AM -0800, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: c5c17547b778 Merge tag 'net-5.16-rc3' of git://git.kernel...
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=13a73609b00000
> kernel config: https://syzkaller.appspot.com/x/.config?x=bf85c53718a1e697
> dashboard link: https://syzkaller.appspot.com/bug?extid=10e27961f4da37c443b2
> compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
>
> Unfortunately, I don't have any reproducer for this issue yet.
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+10e27961f4da37c443b2@syzkaller.appspotmail.com
>
> ------------[ cut here ]------------
> WARNING: CPU: 2 PID: 17169 at kernel/dma/mapping.c:188 __dma_map_sg_attrs+0x181/0x1f0 kernel/dma/mapping.c:188
> Modules linked in:
> CPU: 0 PID: 17169 Comm: syz-executor.3 Not tainted 5.16.0-rc2-syzkaller #0
> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
> RIP: 0010:__dma_map_sg_attrs+0x181/0x1f0 kernel/dma/mapping.c:188
> Code: 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 71 4c 8b 3d 70 6d b1 0d e9 db fe ff ff e8 86 ff 12 00 0f 0b e8 7f ff 12 00 <0f> 0b 45 31 e4 e9 54 ff ff ff e8 70 ff 12 00 49 8d 7f 50 48 b8 00
> RSP: 0018:ffffc90002c0fb20 EFLAGS: 00010216
> RAX: 0000000000013018 RBX: 0000000000000020 RCX: ffffc900037d4000
> RDX: 0000000000040000 RSI: ffffffff8163d361 RDI: ffff8880182ae4d0
> RBP: ffff8880182ae088 R08: 0000000000000002 R09: ffff888017ba054f
> R10: ffffffff8163d242 R11: 000000000008808a R12: 0000000000000000
> R13: ffff888024ca5700 R14: 0000000000000001 R15: 0000000000000000
> FS: 00007fa269e34700(0000) GS:ffff88802cb00000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 000000000040c120 CR3: 000000006c77c000 CR4: 0000000000150ee0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> Call Trace:
> <TASK>
> dma_map_sgtable+0x70/0xf0 kernel/dma/mapping.c:264
> drm_gem_map_dma_buf+0x12a/0x1e0 drivers/gpu/drm/drm_prime.c:633
> __map_dma_buf drivers/dma-buf/dma-buf.c:675 [inline]
> dma_buf_map_attachment+0x39a/0x5b0 drivers/dma-buf/dma-buf.c:954
> drm_gem_prime_import_dev.part.0+0x85/0x220 drivers/gpu/drm/drm_prime.c:939
> drm_gem_prime_import_dev drivers/gpu/drm/drm_prime.c:982 [inline]
> drm_gem_prime_import+0xc8/0x200 drivers/gpu/drm/drm_prime.c:982
> virtgpu_gem_prime_import+0x49/0x150 drivers/gpu/drm/virtio/virtgpu_prime.c:166
> drm_gem_prime_fd_to_handle+0x21d/0x550 drivers/gpu/drm/drm_prime.c:318
> drm_prime_fd_to_handle_ioctl+0x9b/0xd0 drivers/gpu/drm/drm_prime.c:374
> drm_ioctl_kernel+0x27d/0x4e0 drivers/gpu/drm/drm_ioctl.c:782
> drm_ioctl+0x51e/0x9d0 drivers/gpu/drm/drm_ioctl.c:885
> vfs_ioctl fs/ioctl.c:51 [inline]
> __do_sys_ioctl fs/ioctl.c:874 [inline]
> __se_sys_ioctl fs/ioctl.c:860 [inline]
> __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
> do_syscall_x64 arch/x86/entry/common.c:50 [inline]
> do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
> entry_SYSCALL_64_after_hwframe+0x44/0xae
> RIP: 0033:0x7fa26c8beae9
> 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 bc ff ff ff f7 d8 64 89 01 48
> RSP: 002b:00007fa269e34188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
> RAX: ffffffffffffffda RBX: 00007fa26c9d1f60 RCX: 00007fa26c8beae9
> RDX: 00000000200004c0 RSI: 00000000c00c642e RDI: 0000000000000005
> RBP: 00007fa26c918f6d R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
> R13: 00007ffc0019c51f R14: 00007fa269e34300 R15: 0000000000022000
> </TASK>
>
>
> ---
> 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@googlegroups.com.
>
> syzbot will keep track of this issue. See:
> https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
---end quoted text---
_______________________________________________
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next prev parent reply other threads:[~2021-12-02 6:55 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-01 18:18 [syzbot] WARNING in __dma_map_sg_attrs syzbot
2021-12-01 18:18 ` syzbot
2021-12-02 6:55 ` Christoph Hellwig [this message]
2021-12-02 6:55 ` Christoph Hellwig
2022-02-05 20:18 ` syzbot
2022-02-05 20:18 ` syzbot
2022-02-08 12:26 ` Daniel Vetter
2022-02-08 12:26 ` Daniel Vetter
2022-02-08 12:26 ` Daniel Vetter
2022-05-19 12:25 ` Dmitry Vyukov
2022-05-19 12:25 ` Dmitry Vyukov via iommu
2022-05-20 6:23 ` [PATCH] udmabuf: Set the DMA mask for the udmabuf device Vivek Kasireddy
2022-05-20 20:52 ` [PATCH] udmabuf: Set the DMA mask for the udmabuf device (v2) Vivek Kasireddy
2022-05-20 19:32 [PATCH] udmabuf: Set the DMA mask for the udmabuf device kernel test robot
2022-05-23 11:03 ` Dan Carpenter
2022-05-23 11:03 ` Dan Carpenter
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