loop2: detected capacity change from 0 to 32768
ocfs2: Mounting device (7,2) on (node local, slot 0) with ordered data mode.
BUG: kernel NULL pointer dereference, address: 0000000000000011
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 800000002a9fd067 P4D 800000002a9fd067 PUD 0
Oops: Oops: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 0 UID: 0 PID: 6033 Comm: syz.2.21 Not tainted 6.14.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:___slab_alloc+0x595/0x14a0 mm/slub.c:3769
Code: 85 fb 00 00 00 65 4c 8b 2c 25 00 d5 03 00 4c 89 6b 28 49 83 7e 10 00 0f 85 82 01 00 00 49 8b 5e 18 48 85 db 0f 84 ea 04 00 00 <48> 8b 43 10 49 89 46 18 8b 4c 24 10 83 f9 ff 74 15 48 8b 03 48 83
RSP: 0018:ffffc9000454e150 EFLAGS: 00010002
RAX: f1be6b6da9c57000 RBX: 0000000000000001 RCX: ffff888031a446e8
RDX: dffffc0000000000 RSI: ffffffff8c2ab680 RDI: ffffffff8c801a80
RBP: 0000000000000202 R08: ffffffff94511847 R09: 1ffffffff28a2308
R10: dffffc0000000000 R11: fffffbfff28a2309 R12: ffff8880330c4780
R13: ffff888031a43c00 R14: ffffe8ffffc6d0a0 R15: ffffffff821b60af
FS: 00007fdc89a226c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000011 CR3: 000000007b4bc000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__slab_alloc+0x58/0xa0 mm/slub.c:3916
__slab_alloc_node mm/slub.c:3991 [inline]
slab_alloc_node mm/slub.c:4152 [inline]
kmem_cache_alloc_noprof+0x268/0x380 mm/slub.c:4171
jbd2_alloc+0x155/0x1b0 fs/jbd2/journal.c:2763
jbd2_journal_get_undo_access+0x1d1/0x310 fs/jbd2/transaction.c:1395
__ocfs2_journal_access+0x4de/0x8b0 fs/ocfs2/journal.c:692
ocfs2_block_group_set_bits+0x29e/0x9a0 fs/ocfs2/suballoc.c:1387
ocfs2_search_chain+0x1b27/0x26c0 fs/ocfs2/suballoc.c:1900
ocfs2_claim_suballoc_bits+0x11ef/0x2560 fs/ocfs2/suballoc.c:1985
__ocfs2_claim_clusters+0x332/0xa40 fs/ocfs2/suballoc.c:2395
ocfs2_claim_clusters fs/ocfs2/suballoc.c:2432 [inline]
ocfs2_block_group_alloc_contig fs/ocfs2/suballoc.c:432 [inline]
ocfs2_block_group_alloc fs/ocfs2/suballoc.c:699 [inline]
ocfs2_reserve_suballoc_bits+0x115e/0x4e70 fs/ocfs2/suballoc.c:832
ocfs2_reserve_new_metadata_blocks+0x41c/0x9c0 fs/ocfs2/suballoc.c:982
ocfs2_mknod+0x143a/0x2b30 fs/ocfs2/namei.c:347
ocfs2_create+0x1ab/0x470 fs/ocfs2/namei.c:673
lookup_open fs/namei.c:3651 [inline]
open_last_lookups fs/namei.c:3750 [inline]
path_openat+0x193c/0x3590 fs/namei.c:3986
do_filp_open+0x27f/0x4e0 fs/namei.c:4016
do_sys_openat2+0x13e/0x1d0 fs/open.c:1428
do_sys_open fs/open.c:1443 [inline]
__do_sys_openat fs/open.c:1459 [inline]
__se_sys_openat fs/open.c:1454 [inline]
__x64_sys_openat+0x247/0x2a0 fs/open.c:1454
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdc88b8d169
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:00007fdc89a22038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fdc88da5fa0 RCX: 00007fdc88b8d169
RDX: 00000000001c5442 RSI: 0000400000000240 RDI: ffffffffffffff9c
RBP: 00007fdc88c0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fdc88da5fa0 R15: 00007ffd61224f88
</TASK>
Modules linked in:
CR2: 0000000000000011
---[ end trace 0000000000000000 ]---
RIP: 0010:___slab_alloc+0x595/0x14a0 mm/slub.c:3769
Code: 85 fb 00 00 00 65 4c 8b 2c 25 00 d5 03 00 4c 89 6b 28 49 83 7e 10 00 0f 85 82 01 00 00 49 8b 5e 18 48 85 db 0f 84 ea 04 00 00 <48> 8b 43 10 49 89 46 18 8b 4c 24 10 83 f9 ff 74 15 48 8b 03 48 83
RSP: 0018:ffffc9000454e150 EFLAGS: 00010002
RAX: f1be6b6da9c57000 RBX: 0000000000000001 RCX: ffff888031a446e8
RDX: dffffc0000000000 RSI: ffffffff8c2ab680 RDI: ffffffff8c801a80
RBP: 0000000000000202 R08: ffffffff94511847 R09: 1ffffffff28a2308
R10: dffffc0000000000 R11: fffffbfff28a2309 R12: ffff8880330c4780
R13: ffff888031a43c00 R14: ffffe8ffffc6d0a0 R15: ffffffff821b60af
FS: 00007fdc89a226c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000011 CR3: 000000007b4bc000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 85 fb test %edi,%ebx
2: 00 00 add %al,(%rax)
4: 00 65 4c add %ah,0x4c(%rbp)
7: 8b 2c 25 00 d5 03 00 mov 0x3d500,%ebp
e: 4c 89 6b 28 mov %r13,0x28(%rbx)
12: 49 83 7e 10 00 cmpq $0x0,0x10(%r14)
17: 0f 85 82 01 00 00 jne 0x19f
1d: 49 8b 5e 18 mov 0x18(%r14),%rbx
21: 48 85 db test %rbx,%rbx
24: 0f 84 ea 04 00 00 je 0x514
* 2a: 48 8b 43 10 mov 0x10(%rbx),%rax <-- trapping instruction
2e: 49 89 46 18 mov %rax,0x18(%r14)
32: 8b 4c 24 10 mov 0x10(%rsp),%ecx
36: 83 f9 ff cmp $0xffffffff,%ecx
39: 74 15 je 0x50
3b: 48 8b 03 mov (%rbx),%rax
3e: 48 rex.W
3f: 83 .byte 0x83