loop0: detected capacity change from 0 to 128
EXT4-fs (loop0): mounted filesystem without journal. Quota mode: none.
general protection fault, probably for non-canonical address 0xdffffc0000000007: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000038-0x000000000000003f]
CPU: 0 PID: 4012 Comm: syz.0.68 Not tainted 6.1.110-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:__ext4_journal_get_write_access+0xc6/0x6b0 fs/ext4/ext4_jbd2.c:231
Code: 31 c0 49 8d 5e 30 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 18 a2 af 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 fb a1 af ff 4c 8b 23 4d 85 e4 4c
RSP: 0018:ffffc900038ef800 EFLAGS: 00010202
RAX: 0000000000000007 RBX: 0000000000000038 RCX: ffff88802aab3b80
RDX: dffffc0000000000 RSI: ffff88802aab3b80 RDI: ffffc900038ef780
RBP: ffffc900038ef8d0 R08: ffff888075ff4910 R09: 0000000000000001
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888077ff6678
R13: dffffc0000000000 R14: ffff888075ff4910 R15: 0000000000000001
FS: 00007f6a5e9d36c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff852ad028 CR3: 000000005d6bc000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
ext4_update_primary_sb fs/ext4/ioctl.c:67 [inline]
ext4_update_superblocks_fn+0x2f5/0x1020 fs/ext4/ioctl.c:221
ext4_fill_super+0x3142/0x8b50 fs/ext4/super.c:5683
get_tree_bdev+0x3fe/0x620 fs/super.c:1366
vfs_get_tree+0x88/0x270 fs/super.c:1573
do_new_mount+0x2ba/0xb40 fs/namespace.c:3051
do_mount fs/namespace.c:3394 [inline]
__do_sys_mount fs/namespace.c:3602 [inline]
__se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3579
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f6a5db7f69a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6a5e9d2e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f6a5e9d2ef0 RCX: 00007f6a5db7f69a
RDX: 0000000020000200 RSI: 0000000020000740 RDI: 00007f6a5e9d2eb0
RBP: 0000000020000200 R08: 00007f6a5e9d2ef0 R09: 000000000000c000
R10: 000000000000c000 R11: 0000000000000246 R12: 0000000020000740
R13: 00007f6a5e9d2eb0 R14: 0000000000000246 R15: 00000000200006c0
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__ext4_journal_get_write_access+0xc6/0x6b0 fs/ext4/ext4_jbd2.c:231
Code: 31 c0 49 8d 5e 30 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 18 a2 af 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 fb a1 af ff 4c 8b 23 4d 85 e4 4c
RSP: 0018:ffffc900038ef800 EFLAGS: 00010202
RAX: 0000000000000007 RBX: 0000000000000038 RCX: ffff88802aab3b80
RDX: dffffc0000000000 RSI: ffff88802aab3b80 RDI: ffffc900038ef780
RBP: ffffc900038ef8d0 R08: ffff888075ff4910 R09: 0000000000000001
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888077ff6678
R13: dffffc0000000000 R14: ffff888075ff4910 R15: 0000000000000001
FS: 00007f6a5e9d36c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f42e22e8108 CR3: 000000005d6bc000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 31 c0 xor %eax,%eax
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 18 a2 af ff call 0xffafa234
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 fb a1 af ff call 0xffafa234
39: 4c 8b 23 mov (%rbx),%r12
3c: 4d 85 e4 test %r12,%r12
3f: 4c rex.WR