Oops: general protection fault, probably for non-canonical address 0xdffffc000000003c: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x00000000000001e0-0x00000000000001e7]
CPU: 0 UID: 0 PID: 7343 Comm: syz.0.341 Not tainted 6.14.0-rc6-syzkaller-00212-geb88e6bfbc0a #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__lock_acquire+0xe4/0x3c40 kernel/locking/lockdep.c:5091
Code: 08 84 d2 0f 85 15 14 00 00 44 8b 0d 0a 25 cc 0e 45 85 c9 0f 84 b4 0e 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 96 2c 00 00 49 8b 04 24 48 3d a0 57 83 93 0f 84
RSP: 0018:ffffc90004cafa08 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 000000000000003c RSI: 1ffff92000995f53 RDI: 00000000000001e0
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff90626417 R11: 0000000000000000 R12: 00000000000001e0
R13: ffff88804ee24880 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f9fa3c906c0(0000) GS:ffff88806a600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000025a96000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5851
 down_read_killable+0x9d/0x380 kernel/locking/rwsem.c:1547
 mmap_read_lock_killable include/linux/mmap_lock.h:199 [inline]
 do_pagemap_scan+0x6a3/0xcd0 fs/proc/task_mmu.c:2766
 do_pagemap_cmd+0x58/0x80 fs/proc/task_mmu.c:2819
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl fs/ioctl.c:892 [inline]
 __x64_sys_ioctl+0x190/0x200 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9fa2d8d169
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9fa3c90038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9fa2fa5fa0 RCX: 00007f9fa2d8d169
RDX: 0000400000000480 RSI: 00000000c0606610 RDI: 0000000000000007
RBP: 00007f9fa2e0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f9fa2fa5fa0 R15: 00007ffe4ae40708
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__lock_acquire+0xe4/0x3c40 kernel/locking/lockdep.c:5091
Code: 08 84 d2 0f 85 15 14 00 00 44 8b 0d 0a 25 cc 0e 45 85 c9 0f 84 b4 0e 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 96 2c 00 00 49 8b 04 24 48 3d a0 57 83 93 0f 84
RSP: 0018:ffffc90004cafa08 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 000000000000003c RSI: 1ffff92000995f53 RDI: 00000000000001e0
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff90626417 R11: 0000000000000000 R12: 00000000000001e0
R13: ffff88804ee24880 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f9fa3c906c0(0000) GS:ffff88806a600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000025a96000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	08 84 d2 0f 85 15 14 	or     %al,0x1415850f(%rdx,%rdx,8)
   7:	00 00                	add    %al,(%rax)
   9:	44 8b 0d 0a 25 cc 0e 	mov    0xecc250a(%rip),%r9d        # 0xecc251a
  10:	45 85 c9             	test   %r9d,%r9d
  13:	0f 84 b4 0e 00 00    	je     0xecd
  19:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  20:	fc ff df
  23:	4c 89 e2             	mov    %r12,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 96 2c 00 00    	jne    0x2cca
  34:	49 8b 04 24          	mov    (%r12),%rax
  38:	48 3d a0 57 83 93    	cmp    $0xffffffff938357a0,%rax
  3e:	0f                   	.byte 0xf
  3f:	84                   	.byte 0x84