syzkaller login: [ 32.174094][ T3657] cgroup: Unknown subsys name 'net' [ 32.326232][ T3657] cgroup: Unknown subsys name 'rlimit' [ 32.540165][ T3657] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 33.105959][ T3663] syz-executor (3663) used greatest stack depth: 11408 bytes left [ 33.941738][ T3727] veth0_vlan: entered promiscuous mode [ 34.151956][ T3727] syz-executor (3727) used greatest stack depth: 11344 bytes left [ 34.406446][ T35] veth0_vlan: left promiscuous mode [ 35.049413][ T3939] veth0_vlan: entered promiscuous mode [ 35.576416][ T35] veth0_vlan: left promiscuous mode Warning: Permanently added '10.128.0.209' (ED25519) to the list of known hosts. 2025/10/23 20:18:54 parsed 1 programs [ 54.465756][ T4155] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 55.737985][ T4193] veth0_vlan: entered promiscuous mode [ 56.167354][ T2473] veth0_vlan: left promiscuous mode 2025/10/23 20:18:57 executed programs: 0 [ 57.018021][ T4436] veth0_vlan: entered promiscuous mode [ 57.222165][ T4627] syz.2.17[4627]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 57.299649][ T4627] loop2: detected capacity change from 0 to 32768 [ 57.306543][ T4627] ======================================================= [ 57.306543][ T4627] WARNING: The mand mount option has been deprecated and [ 57.306543][ T4627] and is ignored by this kernel. Remove the mand [ 57.306543][ T4627] option from the mount to silence this warning. [ 57.306543][ T4627] ======================================================= [ 57.352604][ T4627] JBD2: Ignoring recovery information on journal [ 57.362414][ T4627] ocfs2: Mounting device (7,2) on (node local, slot 0) with ordered data mode. [ 57.372830][ T4627] ------------[ cut here ]------------ [ 57.378439][ T4627] kernel BUG at fs/ocfs2/suballoc.c:1349! [ 57.384425][ T4627] invalid opcode: 0000 [#1] PREEMPT SMP [ 57.389987][ T4627] CPU: 0 PID: 4627 Comm: syz.2.17 Not tainted syzkaller #0 [ 57.397623][ T4627] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 [ 57.408178][ T4627] RIP: 0010:ocfs2_block_group_set_bits+0x1b9/0x220 [ 57.414948][ T4627] Code: 93 83 ba 51 05 00 00 48 c7 c1 a3 52 97 83 e8 de 1d 04 00 eb a1 0f 0b e9 c1 fe ff ff 0f 0b e9 d3 fe ff ff e8 39 a1 43 01 0f 0b <0f> 0b f3 0f 1e fa 4d 89 f4 65 8b 05 93 c2 71 7e 83 f8 08 73 4d 89 [ 57.436055][ T4627] RSP: 0018:ffffc9000268b930 EFLAGS: 00010212 [ 57.442510][ T4627] RAX: 0000000000000003 RBX: 0000000000000040 RCX: 0000000000000000 [ 57.450474][ T4627] RDX: 0000000000000000 RSI: ffffffff839613dd RDI: ffff88810bde6000 [ 57.458893][ T4627] RBP: 0000000000000255 R08: 0000000000000255 R09: 0000000000000040 [ 57.467959][ T4627] R10: 0000000000000009 R11: 0000000000000008 R12: ffff88810bde6000 [ 57.477605][ T4627] R13: ffff88810eadcd38 R14: ffff88810ea7d930 R15: ffff88810bde6000 [ 57.486531][ T4627] FS: 00007f88bff7a6c0(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000 [ 57.496070][ T4627] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 57.503443][ T4627] CR2: 00007fa4d0785000 CR3: 00000001193f8000 CR4: 00000000003506f0 [ 57.511750][ T4627] Call Trace: [ 57.515109][ T4627] [ 57.518214][ T4627] ocfs2_search_chain+0x936/0xb60 [ 57.524156][ T4627] ? start_this_handle+0x856/0x900 [ 57.529469][ T4627] ocfs2_claim_suballoc_bits+0x417/0x9b0 [ 57.535432][ T4627] ? kmem_cache_alloc+0x147/0x2c0 [ 57.542058][ T4627] ? rcu_is_watching+0x10/0x40 [ 57.547088][ T4627] __ocfs2_claim_clusters+0x105/0x280 [ 57.553159][ T4627] ? jbd2_journal_start+0x18/0x20 [ 57.558342][ T4627] ocfs2_reserve_suballoc_bits+0x4f6/0x1520 [ 57.564807][ T4627] ? ocfs2_reserve_new_metadata_blocks+0x5d/0x310 [ 57.571379][ T4627] ? ocfs2_reserve_new_metadata_blocks+0x5d/0x310 [ 57.578547][ T4627] ocfs2_reserve_new_metadata_blocks+0x107/0x310 [ 57.585566][ T4627] ocfs2_lock_allocators+0x93/0x200 [ 57.591350][ T4627] ocfs2_extend_allocation+0x1b4/0x910 [ 57.597037][ T4627] ? ocfs2_initialize_journal_triggers+0x120/0x120 [ 57.603782][ T4627] ocfs2_allocate_unwritten_extents+0xd5/0x2d0 [ 57.610214][ T4627] __ocfs2_change_file_space+0x3e2/0x600 [ 57.615912][ T4627] ? vfs_fallocate+0x18d/0x1d0 [ 57.620788][ T4627] ocfs2_fallocate+0xd1/0x100 [ 57.625618][ T4627] vfs_fallocate+0x1a5/0x1d0 [ 57.630526][ T4627] __x64_sys_fallocate+0x41/0x70 [ 57.635811][ T4627] do_syscall_64+0x55/0xb0 [ 57.640596][ T4627] ? clear_bhb_loop+0x40/0x90 [ 57.645531][ T4627] ? clear_bhb_loop+0x40/0x90 [ 57.650821][ T4627] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 57.657155][ T4627] RIP: 0033:0x7f88bf18ebe9 [ 57.661811][ T4627] 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 [ 57.683913][ T4627] RSP: 002b:00007f88bff7a038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d [ 57.692984][ T4627] RAX: ffffffffffffffda RBX: 00007f88bf3c5fa0 RCX: 00007f88bf18ebe9 [ 57.701646][ T4627] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 57.710126][ T4627] RBP: 00007f88bf211e19 R08: 0000000000000000 R09: 0000000000000000 [ 57.718167][ T4627] R10: 0000000008000c62 R11: 0000000000000246 R12: 0000000000000000 [ 57.726552][ T4627] R13: 00007f88bf3c6038 R14: 00007f88bf3c5fa0 R15: 00007fff1c68d268 [ 57.735115][ T4627] [ 57.738113][ T4627] Modules linked in: [ 57.742913][ T4627] ---[ end trace 0000000000000000 ]--- [ 57.749112][ T4627] RIP: 0010:ocfs2_block_group_set_bits+0x1b9/0x220 [ 57.757339][ T4627] Code: 93 83 ba 51 05 00 00 48 c7 c1 a3 52 97 83 e8 de 1d 04 00 eb a1 0f 0b e9 c1 fe ff ff 0f 0b e9 d3 fe ff ff e8 39 a1 43 01 0f 0b <0f> 0b f3 0f 1e fa 4d 89 f4 65 8b 05 93 c2 71 7e 83 f8 08 73 4d 89 [ 57.780762][ T4627] RSP: 0018:ffffc9000268b930 EFLAGS: 00010212 [ 57.788907][ T4627] RAX: 0000000000000003 RBX: 0000000000000040 RCX: 0000000000000000 [ 57.799368][ T4627] RDX: 0000000000000000 RSI: ffffffff839613dd RDI: ffff88810bde6000 [ 57.809279][ T4627] RBP: 0000000000000255 R08: 0000000000000255 R09: 0000000000000040 [ 57.819504][ T4627] R10: 0000000000000009 R11: 0000000000000008 R12: ffff88810bde6000 [ 57.828874][ T4627] R13: ffff88810eadcd38 R14: ffff88810ea7d930 R15: ffff88810bde6000 [ 57.837874][ T4627] FS: 00007f88bff7a6c0(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000 [ 57.848658][ T4627] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 57.855385][ T4627] CR2: 0000001b31f63fff CR3: 00000001193f8000 CR4: 00000000003506e0 [ 57.864407][ T4627] Kernel panic - not syncing: Fatal exception [ 57.871379][ T4627] Kernel Offset: disabled [ 57.876554][ T4627] Rebooting in 86400 seconds..