Vivek Kasireddy e658538c61 udmabuf: Set the DMA mask for the udmabuf device (v2) ... commit 9e9fa6a919 upstream. If the DMA mask is not set explicitly, the following warning occurs when the userspace tries to access the dma-buf via the CPU as reported by syzbot here: WARNING: CPU: 1 PID: 3595 at kernel/dma/mapping.c:188 __dma_map_sg_attrs+0x181/0x1f0 kernel/dma/mapping.c:188 Modules linked in: CPU: 0 PID: 3595 Comm: syz-executor249 Not tainted 5.17.0-rc2-syzkaller-00316-g0457e5153e0e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 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 c0 83 b5 0d e9 db fe ff ff e8 b6 0f 13 00 0f 0b e8 af 0f 13 00 <0f> 0b 45 31 e4 e9 54 ff ff ff e8 a0 0f 13 00 49 8d 7f 50 48 b8 00 RSP: 0018:ffffc90002a07d68 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88807e25e2c0 RSI: ffffffff81649e91 RDI: ffff88801b848408 RBP: ffff88801b848000 R08: 0000000000000002 R09: ffff88801d86c74f R10: ffffffff81649d72 R11: 0000000000000001 R12: 0000000000000002 R13: ffff88801d86c680 R14: 0000000000000001 R15: 0000000000000000 FS: 0000555556e30300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000200000cc CR3: 000000001d74a000 CR4: 00000000003506e0 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 get_sg_table.isra.0+0xe0/0x160 drivers/dma-buf/udmabuf.c:72 begin_cpu_udmabuf+0x130/0x1d0 drivers/dma-buf/udmabuf.c:126 dma_buf_begin_cpu_access+0xfd/0x1d0 drivers/dma-buf/dma-buf.c:1164 dma_buf_ioctl+0x259/0x2b0 drivers/dma-buf/dma-buf.c:363 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: 0033:0x7f62fcf530f9 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:00007ffe3edab9b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f62fcf530f9 RDX: 0000000020000200 RSI: 0000000040086200 RDI: 0000000000000006 RBP: 00007f62fcf170e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f62fcf17170 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> v2: Dont't forget to deregister if DMA mask setup fails. Reported-by: syzbot+10e27961f4da37c443b2@syzkaller.appspotmail.com Cc: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20220520205235.3687336-1-vivek.kasireddy@intel.com Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-09-05 10:30:06 +02:00
..
heaps	dma-buf: cma_heap: Fix mutex locking section	2022-03-08 19:12:37 +01:00
dma-buf-sysfs-stats.c	dma-buf: Delete the DMA-BUF attachment sysfs statistics	2021-07-20 11:06:59 +02:00
dma-buf-sysfs-stats.h	dma-buf: Delete the DMA-BUF attachment sysfs statistics	2021-07-20 11:06:59 +02:00
dma-buf.c	dma-buf/poll: Get a file reference for outstanding fence callbacks	2022-07-12 16:34:51 +02:00
dma-fence-array.c	dma_fence_array: Fix PENDING_ERROR leak in dma_fence_array_signaled()	2022-01-27 11:02:59 +01:00
dma-fence-chain.c	dma-buf: some dma_fence_chain improvements	2021-06-14 19:33:16 +02:00
dma-fence.c	drm/syncobj: use newly allocated stub fences	2021-04-08 12:21:13 +02:00
dma-heap.c	dma-buf: heaps: Fix potential spectre v1 gadget	2022-02-08 18:34:06 +01:00
dma-resv.c	dma-buf: fix dma_resv_test_signaled test_all handling v2	2021-07-08 14:59:08 +02:00
Kconfig	dma-buf: DMABUF_SYSFS_STATS should depend on DMA_SHARED_BUFFER	2021-09-07 12:42:21 +05:30
Makefile	dmabuf: Add the capability to expose DMA-BUF stats in sysfs	2021-06-15 11:50:24 +02:00
selftest.c	dma-buf: Introduce selftesting framework	2019-08-19 18:01:34 +01:00
selftest.h	dma-buf: Introduce selftesting framework	2019-08-19 18:01:34 +01:00
selftests.h	Merge drm/drm-next into drm-intel-next-queued	2020-06-25 18:05:03 +03:00
seqno-fence.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174	2019-05-30 11:26:41 -07:00
st-dma-fence-chain.c	dma-buf: add dma_fence_chain_alloc/free v3	2021-06-14 19:38:34 +02:00
st-dma-fence.c	dma-buf: Avoid comma separated statements	2021-02-09 17:14:11 +01:00
sw_sync.c	compat_ioctl: move more drivers to compat_ptr_ioctl	2019-10-23 17:23:44 +02:00
sync_debug.c	Linux 5.2-rc5	2019-06-19 12:07:29 +02:00
sync_debug.h
sync_file.c	dma-buf/sync_file: Don't leak fences on merge failure	2021-07-12 13:34:49 +02:00
sync_trace.h
udmabuf.c	udmabuf: Set the DMA mask for the udmabuf device (v2)	2022-09-05 10:30:06 +02:00