loop0: detected capacity change from 0 to 49152
EXT4-fs (loop0): Using encoding defined by superblock: utf8-12.1.0 with flags 0x0
EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w with ordered data mode. Quota mode: journalled.
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f]
CPU: 0 UID: 0 PID: 5350 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:jbd2_journal_file_inode+0x10e/0x5c0 fs/jbd2/transaction.c:2717
Code: 8f ff 49 8b 06 48 89 44 24 08 48 8d b8 28 07 00 00 48 89 7c 24 30 e8 61 0b 58 09 48 8b 04 24 48 8d 78 28 48 89 f8 48 c1 e8 03 <80> 3c 28 00 74 05 e8 57 02 8f ff 48 8b 1c 24 4c 09 7b 28 4c 8d 7b
RSP: 0018:ffffc9000e02f690 EFLAGS: 00010206
RAX: 0000000000000005 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000028
RBP: dffffc0000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52001c05ec0 R12: 1ffff11002881c60
R13: 00000000000007ff R14: ffff88801440e300 R15: 0000000000000006
FS:  00007f65cfaec6c0(0000) GS:ffff88808a9f9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f65c2bff000 CR3: 000000000c1de000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ext4_jbd2_inode_add_write fs/ext4/ext4_jbd2.h:336 [inline]
 ext4_map_blocks+0x161e/0x1c60 fs/ext4/inode.c:972
 ext4_convert_inline_data_nolock+0x25d/0x980 fs/ext4/inline.c:1139
 ext4_convert_inline_data+0x484/0x5c0 fs/ext4/inline.c:2012
 ext4_setattr+0xef2/0x1550 fs/ext4/inode.c:7106
 notify_change+0xbba/0xea0 fs/attr.c:556
 do_truncate+0x1c2/0x250 fs/open.c:68
 vfs_truncate+0x4b7/0x540 fs/open.c:118
 ksys_truncate+0xf3/0x1c0 fs/open.c:142
 __do_sys_truncate fs/open.c:154 [inline]
 __se_sys_truncate fs/open.c:152 [inline]
 __x64_sys_truncate+0x5b/0x70 fs/open.c:152
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x16a/0x530 arch/x86/entry/syscall_64.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f65ceba8fd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f65cfaebfe8 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
RAX: ffffffffffffffda RBX: 00007f65cee25fa0 RCX: 00007f65ceba8fd9
RDX: 0000000000000000 RSI: 0000000000008000 RDI: 0000200000000f40
RBP: 00007f65cec37fed R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f65cee26038 R14: 00007f65cee25fa0 R15: 00007ffd4df7fe48
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:jbd2_journal_file_inode+0x10e/0x5c0 fs/jbd2/transaction.c:2717
Code: 8f ff 49 8b 06 48 89 44 24 08 48 8d b8 28 07 00 00 48 89 7c 24 30 e8 61 0b 58 09 48 8b 04 24 48 8d 78 28 48 89 f8 48 c1 e8 03 <80> 3c 28 00 74 05 e8 57 02 8f ff 48 8b 1c 24 4c 09 7b 28 4c 8d 7b
RSP: 0018:ffffc9000e02f690 EFLAGS: 00010206
RAX: 0000000000000005 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000028
RBP: dffffc0000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52001c05ec0 R12: 1ffff11002881c60
R13: 00000000000007ff R14: ffff88801440e300 R15: 0000000000000006
FS:  00007f65cfaec6c0(0000) GS:ffff88808a9f9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f65c2bff000 CR3: 000000000c1de000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	49 8b 06             	mov    (%r14),%rax
   3:	48 89 44 24 08       	mov    %rax,0x8(%rsp)
   8:	48 8d b8 28 07 00 00 	lea    0x728(%rax),%rdi
   f:	48 89 7c 24 30       	mov    %rdi,0x30(%rsp)
  14:	e8 61 0b 58 09       	call   0x9580b7a
  19:	48 8b 04 24          	mov    (%rsp),%rax
  1d:	48 8d 78 28          	lea    0x28(%rax),%rdi
  21:	48 89 f8             	mov    %rdi,%rax
  24:	48 c1 e8 03          	shr    $0x3,%rax
* 28:	80 3c 28 00          	cmpb   $0x0,(%rax,%rbp,1) <-- trapping instruction
  2c:	74 05                	je     0x33
  2e:	e8 57 02 8f ff       	call   0xff8f028a
  33:	48 8b 1c 24          	mov    (%rsp),%rbx
  37:	4c 09 7b 28          	or     %r15,0x28(%rbx)
  3b:	4c                   	rex.WR
  3c:	8d                   	.byte 0x8d
  3d:	7b                   	.byte 0x7b