general protection fault, probably for non-canonical address 0xdffffc0000000007: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000038-0x000000000000003f]
CPU: 1 PID: 478 Comm: syz.0.42 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__ext4_journal_get_write_access+0xad/0x6c0 fs/ext4/ext4_jbd2.c:231
Code: 8c ff 49 8d 5e 30 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 d1 e0 d1 ff 48 8b 1b 48 83 c3 38 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 b4 e0 d1 ff 4c 8b 23 4d 85 e4 4c
RSP: 0018:ffffc9000dd87360 EFLAGS: 00010202
RAX: 0000000000000007 RBX: 0000000000000038 RCX: 0000000000080000
RDX: ffffc900016aa000 RSI: 000000000000d946 RDI: 000000000000d947
RBP: ffffc9000dd87430 R08: ffff888132d28888 R09: 0000000000000001
R10: dffffc0000000000 R11: ffffed1026582b4b R12: ffff88813be0847c
R13: dffffc0000000000 R14: ffff888132d28888 R15: 1ffff92001bb0e74
FS:  00007f852bbad6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fba189eb700 CR3: 0000000119885000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_free_branches+0x4f8/0x6b0 fs/ext4/indirect.c:1100
 ext4_free_branches+0x2f3/0x6b0 fs/ext4/indirect.c:1049
 ext4_ind_truncate+0x9d9/0xbd0 fs/ext4/indirect.c:1215
 ext4_truncate+0x97c/0x1000 fs/ext4/inode.c:4306
 ext4_process_orphan+0x1d0/0x300 fs/ext4/orphan.c:337
 ext4_orphan_cleanup+0xb5d/0x1270 fs/ext4/orphan.c:472
 __ext4_fill_super fs/ext4/super.c:5561 [inline]
 ext4_fill_super+0x6a53/0x73e0 fs/ext4/super.c:5680
 get_tree_bdev+0x450/0x6a0 fs/super.c:1371
 ext4_get_tree+0x1c/0x20 fs/ext4/super.c:5710
 vfs_get_tree+0x9a/0x270 fs/super.c:1578
 do_new_mount+0x251/0xb40 fs/namespace.c:3081
 path_mount+0x640/0xfd0 fs/namespace.c:3411
 do_mount fs/namespace.c:3424 [inline]
 __do_sys_mount fs/namespace.c:3632 [inline]
 __se_sys_mount+0x320/0x390 fs/namespace.c:3609
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3609
 x64_sys_call+0x65d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f852ad9f28a
Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007f852bbace58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f852bbacee0 RCX: 00007f852ad9f28a
RDX: 0000200000000440 RSI: 0000200000000480 RDI: 00007f852bbacea0
RBP: 0000200000000440 R08: 00007f852bbacee0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000480
R13: 00007f852bbacea0 R14: 0000000000000460 R15: 00002000000000c0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__ext4_journal_get_write_access+0xad/0x6c0 fs/ext4/ext4_jbd2.c:231
Code: 8c ff 49 8d 5e 30 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 d1 e0 d1 ff 48 8b 1b 48 83 c3 38 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 b4 e0 d1 ff 4c 8b 23 4d 85 e4 4c
RSP: 0018:ffffc9000dd87360 EFLAGS: 00010202
RAX: 0000000000000007 RBX: 0000000000000038 RCX: 0000000000080000
RDX: ffffc900016aa000 RSI: 000000000000d946 RDI: 000000000000d947
RBP: ffffc9000dd87430 R08: ffff888132d28888 R09: 0000000000000001
R10: dffffc0000000000 R11: ffffed1026582b4b R12: ffff88813be0847c
R13: dffffc0000000000 R14: ffff888132d28888 R15: 1ffff92001bb0e74
FS:  00007f852bbad6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f10109ef2f8 CR3: 0000000119885000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	8c ff                	mov    %?,%edi
   2:	49 8d 5e 30          	lea    0x30(%r14),%rbx
   6:	48 89 d8             	mov    %rbx,%rax
   9:	48 c1 e8 03          	shr    $0x3,%rax
   d:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)
  12:	74 08                	je     0x1c
  14:	48 89 df             	mov    %rbx,%rdi
  17:	e8 d1 e0 d1 ff       	call   0xffd1e0ed
  1c:	48 8b 1b             	mov    (%rbx),%rbx
  1f:	48 83 c3 38          	add    $0x38,%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 b4 e0 d1 ff       	call   0xffd1e0ed
  39:	4c 8b 23             	mov    (%rbx),%r12
  3c:	4d 85 e4             	test   %r12,%r12
  3f:	4c                   	rex.WR