general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
CPU: 0 PID: 12719 Comm: syz-executor.0 Not tainted 5.17.0-rc8-syzkaller-00003-g56e337f2cf13 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:sg_alloc_append_table_from_pages+0x822/0xdb0 lib/scatterlist.c:525
Code: 0c 24 48 8b 4c 24 48 48 39 c8 48 0f 46 c8 89 f0 4c 8d 3c c7 48 89 4c 24 30 48 b9 00 00 00 00 00 fc ff df 4c 89 f8 48 c1 e8 03 <80> 3c 08 00 0f 85 24 05 00 00 4d 8b 3f 4c 89 e0 31 ff 83 e0 03 48
RSP: 0018:ffffc9000ef8fc00 EFLAGS: 00010202
RAX: 0000000000000002 RBX: 0000000000000001 RCX: dffffc0000000000
RDX: 0000000000040000 RSI: 0000000000000000 RDI: 0000000000000010
RBP: 00000000fffff000 R08: fffffffffffff000 R09: ffff888019a25380
R10: ffffffff83dcba31 R11: 0000000000000001 R12: 0000000000000002
R13: ffff888019a25380 R14: 0000000000000000 R15: 0000000000000010
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0063) knlGS:00000000f586cb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000002e421000 CR3: 0000000029992000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 sg_alloc_table_from_pages_segment+0xc9/0x260 lib/scatterlist.c:573
 sg_alloc_table_from_pages include/linux/scatterlist.h:348 [inline]
 get_sg_table.isra.0+0xbb/0x160 drivers/dma-buf/udmabuf.c:67
 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
 compat_ptr_ioctl+0x67/0x90 fs/ioctl.c:910
 __do_compat_sys_ioctl+0x1c7/0x290 fs/ioctl.c:972
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf6e72549
Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f586c5cc EFLAGS: 00000296 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000040086200
RDX: 0000000020000140 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:sg_alloc_append_table_from_pages+0x822/0xdb0 lib/scatterlist.c:525
Code: 0c 24 48 8b 4c 24 48 48 39 c8 48 0f 46 c8 89 f0 4c 8d 3c c7 48 89 4c 24 30 48 b9 00 00 00 00 00 fc ff df 4c 89 f8 48 c1 e8 03 <80> 3c 08 00 0f 85 24 05 00 00 4d 8b 3f 4c 89 e0 31 ff 83 e0 03 48
RSP: 0018:ffffc9000ef8fc00 EFLAGS: 00010202
RAX: 0000000000000002 RBX: 0000000000000001 RCX: dffffc0000000000
RDX: 0000000000040000 RSI: 0000000000000000 RDI: 0000000000000010
RBP: 00000000fffff000 R08: fffffffffffff000 R09: ffff888019a25380
R10: ffffffff83dcba31 R11: 0000000000000001 R12: 0000000000000002
R13: ffff888019a25380 R14: 0000000000000000 R15: 0000000000000010
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0063) knlGS:00000000f586cb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000002000b000 CR3: 0000000029992000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	0c 24                	or     $0x24,%al
   2:	48 8b 4c 24 48       	mov    0x48(%rsp),%rcx
   7:	48 39 c8             	cmp    %rcx,%rax
   a:	48 0f 46 c8          	cmovbe %rax,%rcx
   e:	89 f0                	mov    %esi,%eax
  10:	4c 8d 3c c7          	lea    (%rdi,%rax,8),%r15
  14:	48 89 4c 24 30       	mov    %rcx,0x30(%rsp)
  19:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  20:	fc ff df
  23:	4c 89 f8             	mov    %r15,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	80 3c 08 00          	cmpb   $0x0,(%rax,%rcx,1) <-- trapping instruction
  2e:	0f 85 24 05 00 00    	jne    0x558
  34:	4d 8b 3f             	mov    (%r15),%r15
  37:	4c 89 e0             	mov    %r12,%rax
  3a:	31 ff                	xor    %edi,%edi
  3c:	83 e0 03             	and    $0x3,%eax
  3f:	48                   	rex.W