syzkaller
syzkaller login: [ 26.180965][ T3650] cgroup: Unknown subsys name 'net'
[ 26.296000][ T3650] cgroup: Unknown subsys name 'rlimit'
[ 26.492997][ T3650] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k
[ 28.065897][ T3661] veth0_vlan: entered promiscuous mode
[ 28.883427][ T3927] veth0_vlan: entered promiscuous mode
[ 29.135688][ T3661] syz-executor (3661) used greatest stack depth: 11000 bytes left
[ 29.989448][ T11] veth0_vlan: left promiscuous mode
[ 29.995520][ T11] veth0_vlan: left promiscuous mode
Warning: Permanently added '10.128.1.183' (ED25519) to the list of known hosts.
2026/10/15 00:36:54 parsed 1 programs
2026/10/15 00:36:54 serving rpc on tcp://35149
Setting up swapspace version 1, size = 127995904 bytes
[ 38.291259][ T4151] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k
[ 39.759478][ T4183] veth0_vlan: entered promiscuous mode
2026/10/15 00:36:56 executed programs: 0
[ 40.691131][ T2293] veth0_vlan: left promiscuous mode
[ 41.743080][ T4425] veth0_vlan: entered promiscuous mode
[ 41.824301][ T4431] veth0_vlan: entered promiscuous mode
[ 41.854306][ T4433] veth0_vlan: entered promiscuous mode
[ 42.054136][ T4427] veth0_vlan: entered promiscuous mode
[ 42.241970][ T5116] syz.5.17[5116]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set
[ 42.280384][ T5116] loop5: detected capacity change from 0 to 2048
[ 42.289617][ T5116] NILFS (loop5): invalid segment: Magic number mismatch
[ 42.309409][ T5116] NILFS (loop5): trying rollback from an earlier position
[ 42.331124][ T5116] NILFS (loop5): recovery complete
[ 42.350040][ T5137] NILFS (loop5): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
[ 42.368502][ T5116] NILFS (loop5): nilfs_sufile_do_free: segment 9 is already clean
[ 42.385188][ T5116] NILFS (loop5): nilfs_dat_move: invalid vblocknr = 9, [0, 0)
[ 42.392676][ T5116] NILFS error (device loop5): nilfs_bmap_assign: broken bmap (inode number=3)
[ 42.417959][ T5151] loop4: detected capacity change from 0 to 2048
[ 42.420002][ T5150] loop2: detected capacity change from 0 to 2048
[ 42.442239][ T5116] Remounting filesystem read-only
[ 42.448276][ T5116] NILFS (loop5): error -5 cleaning segments
[ 42.453035][ T5150] NILFS (loop2): invalid segment: Magic number mismatch
[ 42.462969][ T5150] NILFS (loop2): trying rollback from an earlier position
[ 42.470627][ T5151] NILFS (loop4): invalid segment: Magic number mismatch
[ 42.482236][ T5151] NILFS (loop4): trying rollback from an earlier position
[ 42.490390][ T5150] NILFS (loop2): recovery complete
[ 42.498875][ T5161] NILFS (loop2): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
[ 42.509520][ T5151] NILFS (loop4): recovery complete
[ 42.519312][ T5150] NILFS (loop2): nilfs_sufile_do_free: segment 9 is already clean
[ 42.527665][ T5150] NILFS (loop2): nilfs_dat_move: invalid vblocknr = 9, [0, 0)
[ 42.529859][ T5164] NILFS (loop4): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
[ 42.535681][ T5150] NILFS error (device loop2): nilfs_bmap_assign: broken bmap (inode number=3)
[ 42.558478][ T5150] Remounting filesystem read-only
[ 42.563566][ T5150] NILFS (loop2): error -5 cleaning segments
[ 42.571030][ T5151] NILFS (loop4): nilfs_sufile_do_free: segment 9 is already clean
[ 42.579506][ T5151] NILFS (loop4): nilfs_dat_move: invalid vblocknr = 9, [0, 0)
[ 42.593686][ T5151] NILFS error (device loop4): nilfs_bmap_assign: broken bmap (inode number=3)
[ 42.603040][ T5151] Remounting filesystem read-only
[ 42.608155][ T5151] NILFS (loop4): error -5 cleaning segments
[ 42.623502][ T5173] loop1: detected capacity change from 0 to 2048
[ 42.635816][ T5173] NILFS (loop1): invalid segment: Magic number mismatch
[ 42.643071][ T5173] NILFS (loop1): trying rollback from an earlier position
[ 42.651442][ T5173] NILFS (loop1): recovery complete
[ 42.657035][ T5175] NILFS (loop1): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
[ 42.658027][ T5173] NILFS (loop1): nilfs_sufile_do_free: segment 9 is already clean
[ 42.677102][ T5173] NILFS (loop1): nilfs_dat_move: invalid vblocknr = 9, [0, 0)
[ 42.684909][ T5173] NILFS error (device loop1): nilfs_bmap_assign: broken bmap (inode number=3)
[ 42.694009][ T5173] Remounting filesystem read-only
[ 42.699341][ T5173] NILFS (loop1): error -5 cleaning segments
[ 43.241989][ T5150] NILFS (loop2): error -30 cleaning segments
[ 43.248134][ T5151] NILFS (loop4): error -30 cleaning segments
[ 43.255008][ T4431] NILFS (loop2): discard dirty page: offset=0, ino=5
[ 43.261890][ T4431] NILFS (loop2): discard dirty block: blocknr=8, size=2048
[ 43.269903][ T4431] NILFS (loop2): discard dirty block: blocknr=18446744073709551615, size=2048
[ 43.269945][ T4433] NILFS (loop4): discard dirty page: offset=0, ino=5
[ 43.278929][ T4431] NILFS (loop2): discard dirty page: offset=0, ino=4
[ 43.285899][ T4433] NILFS (loop4): discard dirty block: blocknr=8, size=2048
[ 43.292379][ T4431] NILFS (loop2): discard dirty block: blocknr=7, size=2048
[ 43.300063][ T4433] NILFS (loop4): discard dirty block: blocknr=18446744073709551615, size=2048
[ 43.308044][ T4431] NILFS (loop2): discard dirty block: blocknr=18446744073709551615, size=2048
[ 43.316335][ T4433] NILFS (loop4): discard dirty page: offset=0, ino=4
[ 43.325077][ T4431] NILFS (loop2): discard dirty page: offset=0, ino=3
[ 43.331716][ T4433] NILFS (loop4): discard dirty block: blocknr=7, size=2048
[ 43.338420][ T4431] NILFS (loop2): discard dirty block: blocknr=9, size=2048
[ 43.345634][ T4433] NILFS (loop4): discard dirty block: blocknr=18446744073709551615, size=2048
[ 43.353522][ T4431] NILFS (loop2): discard dirty block: blocknr=10, size=2048
[ 43.361837][ T4433] NILFS (loop4): discard dirty page: offset=0, ino=3
[ 43.375673][ T4433] NILFS (loop4): discard dirty block: blocknr=9, size=2048
[ 43.383018][ T4431] NILFS (loop2): discard dirty page: offset=4096, ino=3
[ 43.383048][ T4433] NILFS (loop4): discard dirty block: blocknr=10, size=2048
[ 43.390007][ T4431] NILFS (loop2): discard dirty block: blocknr=11, size=2048
[ 43.397437][ T4433] NILFS (loop4): discard dirty page: offset=4096, ino=3
[ 43.404629][ T4431] NILFS (loop2): discard dirty block: blocknr=18446744073709551615, size=2048
[ 43.411766][ T4433] NILFS (loop4): discard dirty block: blocknr=11, size=2048
[ 43.422261][ T4431] VFS: Busy inodes after unmount of loop2 (nilfs2)
[ 43.427872][ T4431] invalid opcode: 0000 [#1] PREEMPT SMP
[ 43.428148][ T4433] NILFS (loop4): discard dirty block: blocknr=18446744073709551615, size=2048
[ 43.434448][ T4431] CPU: 0 PID: 4431 Comm: syz-executor Not tainted syzkaller #0
[ 43.440262][ T4433] VFS: Busy inodes after unmount of loop4 (nilfs2)
[ 43.448789][ T4431] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
[ 43.448800][ T4431] RIP: 0010:generic_shutdown_super+0xf6/0x100
[ 43.448811][ T4431] Code: 83 58 01 00 00 98 d0 ab 88 5b 41 5e c3 48 8b 43 28 48 81 c3 48 06 00 00 48 8b 10 48 c7 c7 08 1a 95 83 48 89 de e8 da d3 87 01 <0f> 0b 0f 1f 84 00 00 00 00 00 66 0f 1f 00 48 8b 87 98 00 00 00 f6
[ 43.448814][ T4431] RSP: 0018:ffffc90002473e20 EFLAGS: 00010246
[ 43.448823][ T4431] RAX: 0000000000000030 RBX: ffff88810afa3648 RCX: 5db1c7d8fcf89f00
[ 43.512436][ T4431] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000ffffffff
[ 43.520382][ T4431] RBP: 0000000000000000 R08: ffffffff83cd4ca0 R09: 0000000000001fff
[ 43.528332][ T4431] R10: ffffffff83ca4c40 R11: 0000000000005ffd R12: ffffffff84c601b8
[ 43.536272][ T4431] R13: 0000000000000000 R14: ffffffff83127408 R15: ffff888101f11c40
[ 43.544235][ T4431] FS: 000055556d277500(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000
[ 43.553153][ T4431] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 43.559710][ T4431] CR2: 000055556d292918 CR3: 000000010afee000 CR4: 00000000003506f0
[ 43.567694][ T4431] Call Trace:
[ 43.570949][ T4431]
[ 43.573865][ T4431] kill_block_super+0x16/0x40
[ 43.578594][ T4431] deactivate_locked_super+0x30/0x110
[ 43.583927][ T4431] cleanup_mnt+0xe6/0x130
[ 43.588272][ T4431] task_work_run+0x7e/0xa0
[ 43.592669][ T4431] exit_to_user_mode_loop+0xb9/0xd0
[ 43.597852][ T4431] exit_to_user_mode_prepare+0xa8/0x100
[ 43.603364][ T4431] syscall_exit_to_user_mode+0x1a/0x40
[ 43.608796][ T4431] do_syscall_64+0x61/0xb0
[ 43.613175][ T4431] ? clear_bhb_loop+0x40/0x90
[ 43.617900][ T4431] ? clear_bhb_loop+0x40/0x90
[ 43.622544][ T4431] entry_SYSCALL_64_after_hwframe+0x68/0xd2
[ 43.628407][ T4431] RIP: 0033:0x7f39c4b9f397
[ 43.632799][ T4431] Code: a2 c7 05 5c 43 25 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
[ 43.652475][ T4431] RSP: 002b:00007ffc24b9c758 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[ 43.660881][ T4431] RAX: 0000000000000000 RBX: 00007f39c4c34474 RCX: 00007f39c4b9f397
[ 43.668858][ T4431] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc24b9c810
[ 43.676798][ T4431] RBP: 00007ffc24b9c810 R08: 00007ffc24b9d810 R09: 00000000ffffffff
[ 43.684739][ T4431] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc24b9d8a0
[ 43.692691][ T4431] R13: 00007f39c4c34474 R14: 000000000000a8c3 R15: 00007ffc24b9d8e0
[ 43.700713][ T4431]
[ 43.703697][ T4431] Modules linked in:
[ 43.707625][ T4433] invalid opcode: 0000 [#2] PREEMPT SMP
[ 43.707697][ T5173] NILFS (loop1): error -30 cleaning segments
[ 43.713151][ T4433] CPU: 1 PID: 4433 Comm: syz-executor Tainted: G D syzkaller #0
[ 43.720102][ T4431] ---[ end trace 0000000000000000 ]---
[ 43.728077][ T4433] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
[ 43.728080][ T4433] RIP: 0010:generic_shutdown_super+0xf6/0x100
[ 43.728088][ T4433] Code: 83 58 01 00 00 98 d0 ab 88 5b 41 5e c3 48 8b 43 28 48 81 c3 48 06 00 00 48 8b 10 48 c7 c7 08 1a 95 83 48 89 de e8 da d3 87 01 <0f> 0b 0f 1f 84 00 00 00 00 00 66 0f 1f 00 48 8b 87 98 00 00 00 f6
[ 43.728092][ T4433] RSP: 0018:ffffc90001f03e20 EFLAGS: 00010246
[ 43.733522][ T4431] RIP: 0010:generic_shutdown_super+0xf6/0x100
[ 43.743544][ T4433] RAX: 0000000000000030 RBX: ffff88811a6d8648 RCX: a67bf9e9c8c34f00
[ 43.743546][ T4433] RDX: ffff88813bd29040 RSI: ffffffff8384880a RDI: 00000000ffffffff
[ 43.743548][ T4433] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
[ 43.743549][ T4433] R10: 5b5d383434343334 R11: 205d313334345420 R12: ffffffff84c601b8
[ 43.743551][ T4433] R13: 0000000000000000 R14: ffffffff83127408 R15: ffff88810b87b880
[ 43.743553][ T4433] FS: 0000555568a1d500(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000
[ 43.743555][ T4433] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 43.743557][ T4433] CR2: 0000555568a38918 CR3: 000000010bb59000 CR4: 00000000003506e0
[ 43.743563][ T4433] Call Trace:
[ 43.743565][ T4433]
[ 43.743567][ T4433] kill_block_super+0x16/0x40
[ 43.743573][ T4433] deactivate_locked_super+0x30/0x110
[ 43.743577][ T4433] cleanup_mnt+0xe6/0x130
[ 43.743581][ T4433] task_work_run+0x7e/0xa0
[ 43.743586][ T4433] exit_to_user_mode_loop+0xb9/0xd0
[ 43.743591][ T4433] exit_to_user_mode_prepare+0xa8/0x100
[ 43.743595][ T4433] syscall_exit_to_user_mode+0x1a/0x40
[ 43.749706][ T4431] Code: 83 58 01 00 00 98 d0 ab 88 5b 41 5e c3 48 8b 43 28 48 81 c3 48 06 00 00 48 8b 10 48 c7 c7 08 1a 95 83 48 89 de e8 da d3 87 01 <0f> 0b 0f 1f 84 00 00 00 00 00 66 0f 1f 00 48 8b 87 98 00 00 00 f6
[ 43.769314][ T4433] do_syscall_64+0x61/0xb0
[ 43.769321][ T4433] ? clear_bhb_loop+0x40/0x90
[ 43.769326][ T4433] ? clear_bhb_loop+0x40/0x90
[ 43.769329][ T4433] entry_SYSCALL_64_after_hwframe+0x68/0xd2
[ 43.769339][ T4433] RIP: 0033:0x7f6bc7f9f397
[ 43.769343][ T4433] Code: a2 c7 05 5c 43 25 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
[ 43.769345][ T4433] RSP: 002b:00007fff76ede088 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[ 43.769349][ T4433] RAX: 0000000000000000 RBX: 00007f6bc8034474 RCX: 00007f6bc7f9f397
[ 43.769351][ T4433] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff76ede140
[ 43.769353][ T4433] RBP: 00007fff76ede140 R08: 00007fff76edf140 R09: 00000000ffffffff
[ 43.769354][ T4433] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff76edf1d0
[ 43.769356][ T4433] R13: 00007f6bc8034474 R14: 000000000000a653 R15: 00007fff76edf210
[ 43.769359][ T4433]
[ 43.769360][ T4433] Modules linked in:
[ 43.781669][ T4433] ---[ end trace 0000000000000000 ]---
[ 43.781674][ T4433] RIP: 0010:generic_shutdown_super+0xf6/0x100
[ 43.790391][ T4427] NILFS (loop1): discard dirty page: offset=0, ino=5
[ 43.797964][ T4433] Code: 83 58 01 00 00 98 d0 ab 88 5b 41 5e c3 48 8b 43 28 48 81 c3 48 06 00 00 48 8b 10 48 c7 c7 08 1a 95 83 48 89 de e8 da d3 87 01 <0f> 0b 0f 1f 84 00 00 00 00 00 66 0f 1f 00 48 8b 87 98 00 00 00 f6
[ 43.805796][ T4427] NILFS (loop1): discard dirty block: blocknr=8, size=2048
[ 43.813822][ T4433] RSP: 0018:ffffc90002473e20 EFLAGS: 00010246
[ 43.821776][ T4427] NILFS (loop1): discard dirty block: blocknr=18446744073709551615, size=2048
[ 43.831309][ T4433]
[ 43.837990][ T4431] RSP: 0018:ffffc90002473e20 EFLAGS: 00010246
[ 43.846129][ T4433] RAX: 0000000000000030 RBX: ffff88810afa3648 RCX: 5db1c7d8fcf89f00
[ 43.849062][ T4431]
[ 43.851907][ T4433] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000ffffffff
[ 43.856625][ T4427] NILFS (loop1): discard dirty page: offset=0, ino=4
[ 43.861932][ T4433] RBP: 0000000000000000 R08: ffffffff83cd4ca0 R09: 0000000000001fff
[ 43.866318][ T4431] RAX: 0000000000000030 RBX: ffff88810afa3648 RCX: 5db1c7d8fcf89f00
[ 43.870605][ T4433] R10: ffffffff83ca4c40 R11: 0000000000005ffd R12: ffffffff84c601b8
[ 43.875796][ T4427] NILFS (loop1): discard dirty block: blocknr=7, size=2048
[ 43.881412][ T4433] R13: 0000000000000000 R14: ffffffff83127408 R15: ffff888101f11c40
[ 43.886779][ T4431] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000ffffffff
[ 43.950189][ T4433] FS: 0000555568a1d500(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000
[ 43.958821][ T4427] NILFS (loop1): discard dirty block: blocknr=18446744073709551615, size=2048
[ 43.966924][ T4433] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 43.974847][ T4427] NILFS (loop1): discard dirty page: offset=0, ino=3
[ 43.983123][ T4433] CR2: 0000555568a38918 CR3: 000000010bb59000 CR4: 00000000003506e0
[ 43.990947][ T4427] NILFS (loop1): discard dirty block: blocknr=9, size=2048
[ 43.998857][ T4433] Kernel panic - not syncing: Fatal exception
[ 44.002066][ T4433] Kernel Offset: disabled