loop0: detected capacity change from 0 to 32768 JBD2: Ignoring recovery information on journal ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode. Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 UID: 0 PID: 5320 Comm: syz.0.0 Not tainted 6.14.0-rc7-syzkaller #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:ocfs2_find_dir_space_id fs/ocfs2/dir.c:3424 [inline] RIP: 0010:ocfs2_prepare_dir_for_insert+0x35b9/0x5fa0 fs/ocfs2/dir.c:4288 Code: 00 00 e8 2a ab 08 fe e9 9f 06 00 00 e8 20 ab 08 fe e9 18 03 00 00 e8 16 ab 08 fe 49 8d 7f 08 49 8d 5f 09 48 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 61 24 00 00 48 89 d8 48 c1 e8 03 42 0f RSP: 0018:ffffc9000d4663a0 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000009 RCX: 0000000000100000 RDX: ffffc9000e96a000 RSI: 000000000000242e RDI: 0000000000000008 RBP: ffffc9000d466b90 R08: ffffffff83b90526 R09: 608b7c562adf3b03 R10: 23ec6d672c196c9a R11: 608b7c562adf3b03 R12: ffff88804d5300c8 R13: dffffc0000000000 R14: ffff88804bd1ddf8 R15: 0000000000000000 FS: 00007f44262916c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f442559e088 CR3: 0000000041256000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __ocfs2_prepare_orphan_dir+0x146/0x310 fs/ocfs2/namei.c:2176 ocfs2_prepare_orphan_dir+0x193/0x4d0 fs/ocfs2/namei.c:2221 ocfs2_add_inode_to_orphan+0x249/0x8d0 fs/ocfs2/namei.c:2669 ocfs2_dio_wr_get_block+0x7a5/0x18d0 fs/ocfs2/aops.c:2190 get_more_blocks fs/direct-io.c:648 [inline] do_direct_IO fs/direct-io.c:936 [inline] __blockdev_direct_IO+0x1c87/0x4890 fs/direct-io.c:1243 ocfs2_direct_IO+0x255/0x2c0 fs/ocfs2/aops.c:2445 generic_file_direct_write+0x1e6/0x400 mm/filemap.c:4025 __generic_file_write_iter+0x126/0x230 mm/filemap.c:4189 ocfs2_file_write_iter+0x19af/0x2180 fs/ocfs2/file.c:2469 do_iter_readv_writev+0x71a/0x9d0 vfs_writev+0x38b/0xbc0 fs/read_write.c:1050 do_pwritev fs/read_write.c:1146 [inline] __do_sys_pwritev2 fs/read_write.c:1204 [inline] __se_sys_pwritev2+0x196/0x2b0 fs/read_write.c:1195 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: 0033:0x7f442538d169 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:00007f4426291038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 RAX: ffffffffffffffda RBX: 00007f44255a5fa0 RCX: 00007f442538d169 RDX: 0000000000000001 RSI: 0000400000000240 RDI: 0000000000000004 RBP: 00007f442540e2a0 R08: 0000000000000000 R09: 0000000000000003 R10: 0000000000007800 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f44255a5fa0 R15: 00007ffff18a3d88 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ocfs2_find_dir_space_id fs/ocfs2/dir.c:3424 [inline] RIP: 0010:ocfs2_prepare_dir_for_insert+0x35b9/0x5fa0 fs/ocfs2/dir.c:4288 Code: 00 00 e8 2a ab 08 fe e9 9f 06 00 00 e8 20 ab 08 fe e9 18 03 00 00 e8 16 ab 08 fe 49 8d 7f 08 49 8d 5f 09 48 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 61 24 00 00 48 89 d8 48 c1 e8 03 42 0f RSP: 0018:ffffc9000d4663a0 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000009 RCX: 0000000000100000 RDX: ffffc9000e96a000 RSI: 000000000000242e RDI: 0000000000000008 RBP: ffffc9000d466b90 R08: ffffffff83b90526 R09: 608b7c562adf3b03 R10: 23ec6d672c196c9a R11: 608b7c562adf3b03 R12: ffff88804d5300c8 R13: dffffc0000000000 R14: ffff88804bd1ddf8 R15: 0000000000000000 FS: 00007f44262916c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f442626ffe0 CR3: 0000000041256000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: e8 2a ab 08 fe call 0xfe08ab31 7: e9 9f 06 00 00 jmp 0x6ab c: e8 20 ab 08 fe call 0xfe08ab31 11: e9 18 03 00 00 jmp 0x32e 16: e8 16 ab 08 fe call 0xfe08ab31 1b: 49 8d 7f 08 lea 0x8(%r15),%rdi 1f: 49 8d 5f 09 lea 0x9(%r15),%rbx 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 61 24 00 00 jne 0x2498 37: 48 89 d8 mov %rbx,%rax 3a: 48 c1 e8 03 shr $0x3,%rax 3e: 42 rex.X 3f: 0f .byte 0xf