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: 5088 Comm: syz-executor.1 Not tainted 5.17.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:sg_alloc_append_table_from_pages+0x896/0xd00 lib/scatterlist.c:525
Code: 01 f0 ff ff 0f 83 41 02 00 00 8b 6c 24 18 48 8b 44 24 70 29 c5 c1 e5 0c 2b 6c 24 14 89 c0 49 8d 5c c5 00 48 89 d8 48 c1 e8 03 <80> 3c 10 00 74 08 48 89 df e8 fc 5d ba fd 4c 8b 2b 89 eb 4c 8b 74
RSP: 0018:ffffc900115efbc0 EFLAGS: 00010202
RAX: 0000000000000002 RBX: 0000000000000010 RCX: 0000000000040000
RDX: dffffc0000000000 RSI: 0000000000000862 RDI: 0000000000000863
RBP: 0000000000001000 R08: dffffc0000000000 R09: ffff88801ad94380
R10: ffffed10035b2874 R11: 0000000000000000 R12: ffff88801ad94380
R13: 0000000000000010 R14: 0000000000000001 R15: 0000000000000000
FS:  00007fa3c3641700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c00e837000 CR3: 000000007be6e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 sg_alloc_table_from_pages_segment+0xb7/0x350 lib/scatterlist.c:573
 sg_alloc_table_from_pages include/linux/scatterlist.h:348 [inline]
 get_sg_table+0xd9/0x150 drivers/dma-buf/udmabuf.c:67
 begin_cpu_udmabuf+0xf5/0x160 drivers/dma-buf/udmabuf.c:126
 dma_buf_begin_cpu_access+0xd8/0x170 drivers/dma-buf/dma-buf.c:1164
 dma_buf_ioctl+0x2a0/0x2f0 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+0xfb/0x170 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fa3c4ccc049
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa3c3641168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fa3c4ddef60 RCX: 00007fa3c4ccc049
RDX: 0000000020000000 RSI: 0000000040086200 RDI: 0000000000000004
RBP: 00007fa3c4d2608d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffea989ff8f R14: 00007fa3c3641300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:sg_alloc_append_table_from_pages+0x896/0xd00 lib/scatterlist.c:525
Code: 01 f0 ff ff 0f 83 41 02 00 00 8b 6c 24 18 48 8b 44 24 70 29 c5 c1 e5 0c 2b 6c 24 14 89 c0 49 8d 5c c5 00 48 89 d8 48 c1 e8 03 <80> 3c 10 00 74 08 48 89 df e8 fc 5d ba fd 4c 8b 2b 89 eb 4c 8b 74
RSP: 0018:ffffc900115efbc0 EFLAGS: 00010202
RAX: 0000000000000002 RBX: 0000000000000010 RCX: 0000000000040000
RDX: dffffc0000000000 RSI: 0000000000000862 RDI: 0000000000000863
RBP: 0000000000001000 R08: dffffc0000000000 R09: ffff88801ad94380
R10: ffffed10035b2874 R11: 0000000000000000 R12: ffff88801ad94380
R13: 0000000000000010 R14: 0000000000000001 R15: 0000000000000000
FS:  00007fa3c3641700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3cadbbe058 CR3: 000000007be6e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	f0 ff                	lock (bad)
   2:	ff 0f                	decl   (%rdi)
   4:	83 41 02 00          	addl   $0x0,0x2(%rcx)
   8:	00 8b 6c 24 18 48    	add    %cl,0x4818246c(%rbx)
   e:	8b 44 24 70          	mov    0x70(%rsp),%eax
  12:	29 c5                	sub    %eax,%ebp
  14:	c1 e5 0c             	shl    $0xc,%ebp
  17:	2b 6c 24 14          	sub    0x14(%rsp),%ebp
  1b:	89 c0                	mov    %eax,%eax
  1d:	49 8d 5c c5 00       	lea    0x0(%r13,%rax,8),%rbx
  22:	48 89 d8             	mov    %rbx,%rax
  25:	48 c1 e8 03          	shr    $0x3,%rax
* 29:	80 3c 10 00          	cmpb   $0x0,(%rax,%rdx,1) <-- trapping instruction
  2d:	74 08                	je     0x37
  2f:	48 89 df             	mov    %rbx,%rdi
  32:	e8 fc 5d ba fd       	callq  0xfdba5e33
  37:	4c 8b 2b             	mov    (%rbx),%r13
  3a:	89 eb                	mov    %ebp,%ebx
  3c:	4c                   	rex.WR
  3d:	8b                   	.byte 0x8b
  3e:	74                   	.byte 0x74