syzkaller syzkaller login: [ 23.597983][ T908] cgroup: Unknown subsys name 'net' [ 23.598901][ T908] cgroup: Unknown subsys name 'net_prio' [ 23.600068][ T908] cgroup: Unknown subsys name 'devices' [ 23.601110][ T908] cgroup: Unknown subsys name 'blkio' [ 23.685989][ T908] cgroup: Unknown subsys name 'hugetlb' [ 23.691621][ T908] cgroup: Unknown subsys name 'rlimit' [ 24.626741][ T908] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k Warning: Permanently added '10.128.1.105' (ED25519) to the list of known hosts. 2023/10/11 19:39:45 ignoring optional flag "sandboxArg"="0" 2023/10/11 19:39:45 parsed 1 programs 2023/10/11 19:39:46 executed programs: 0 [ 44.072091][ T1433] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 44.986696][ T1858] loop0: detected capacity change from 0 to 64 [ 44.993509][ T1858] BUG: kernel NULL pointer dereference, address: 0000000000000040 [ 45.001305][ T1858] #PF: supervisor read access in kernel mode [ 45.007605][ T1858] #PF: error_code(0x0000) - not-present page [ 45.013551][ T1858] PGD 17a1b9067 P4D 17a1b9067 PUD 17cde9067 PMD 0 [ 45.020020][ T1858] Oops: 0000 [#1] SMP [ 45.023972][ T1858] CPU: 1 PID: 1858 Comm: syz-executor.0 Not tainted 5.15.135-syzkaller #0 [ 45.032436][ T1858] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 [ 45.043597][ T1858] RIP: 0010:hfs_find_init+0x14/0xa0 [ 45.048765][ T1858] Code: 21 f0 89 07 e9 5b ff ff ff b8 fe ff ff ff eb 8c cc cc cc cc cc cc 55 48 89 f5 53 48 89 fb 48 89 7e 10 48 c7 46 18 00 00 00 00 <8b> 47 40 be c0 0c 00 00 8d 7c 00 04 e8 2b 44 e6 ff 48 85 c0 74 60 [ 45.068345][ T1858] RSP: 0018:ffffc90001a27ad0 EFLAGS: 00010246 [ 45.074401][ T1858] RAX: ffff88810a170000 RBX: 0000000000000000 RCX: 0000000000000000 [ 45.082353][ T1858] RDX: 0000000000000000 RSI: ffffc90001a27ae8 RDI: 0000000000000000 [ 45.090309][ T1858] RBP: ffffc90001a27ae8 R08: 00000000000005b4 R09: ffffffff82cf84b0 [ 45.098269][ T1858] R10: 0000000000000000 R11: ffffea0005af8400 R12: 0000000000000000 [ 45.106317][ T1858] R13: 0000000000000000 R14: ffff88817c147000 R15: 0000000000000000 [ 45.114698][ T1858] FS: 00007f700614b6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 [ 45.123603][ T1858] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.130280][ T1858] CR2: 0000000000000040 CR3: 0000000178f4f000 CR4: 00000000003506e0 [ 45.138660][ T1858] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 45.146876][ T1858] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 45.154848][ T1858] Call Trace: [ 45.158107][ T1858] [ 45.161131][ T1858] ? __die+0x58/0x97 [ 45.165457][ T1858] ? page_fault_oops+0xa1/0x250 [ 45.170665][ T1858] ? register_lock_class+0x1d1/0x610 [ 45.176141][ T1858] ? exc_page_fault+0x411/0x760 [ 45.183178][ T1858] ? asm_exc_page_fault+0x22/0x30 [ 45.188197][ T1858] ? hfs_find_init+0x14/0xa0 [ 45.192957][ T1858] hfs_ext_read_extent+0x4d/0x190 [ 45.198231][ T1858] ? find_held_lock+0x2b/0x80 [ 45.203417][ T1858] hfs_get_block+0x14d/0x1f0 [ 45.208650][ T1858] block_read_full_page+0x108/0x4c0 [ 45.215439][ T1858] ? hfs_extend_file+0x260/0x260 [ 45.220369][ T1858] ? lru_cache_add+0x147/0x250 [ 45.225229][ T1858] do_read_cache_page+0x33b/0x5d0 [ 45.230722][ T1858] ? hfs_ext_read_extent+0x190/0x190 [ 45.236266][ T1858] hfs_btree_open+0x13d/0x3b0 [ 45.241040][ T1858] hfs_mdb_get+0x507/0x620 [ 45.245553][ T1858] ? lockdep_init_map_type+0x49/0x150 [ 45.251349][ T1858] hfs_fill_super+0x1fc/0x550 [ 45.256087][ T1858] ? vsnprintf+0x112/0x4d0 [ 45.260592][ T1858] ? mount_bdev+0x99/0x1b0 [ 45.265539][ T1858] ? snprintf+0x49/0x60 [ 45.269780][ T1858] mount_bdev+0x184/0x1b0 [ 45.274117][ T1858] ? hfs_remount+0x50/0x50 [ 45.278858][ T1858] legacy_get_tree+0x28/0x50 [ 45.283636][ T1858] vfs_get_tree+0x18/0x70 [ 45.288191][ T1858] ? capable+0x2a/0x50 [ 45.292326][ T1858] path_mount+0x2b1/0xb40 [ 45.296635][ T1858] __x64_sys_mount+0xfe/0x140 [ 45.301285][ T1858] do_syscall_64+0x35/0x80 [ 45.306562][ T1858] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 45.312514][ T1858] RIP: 0033:0x7f70065ca22a [ 45.316904][ T1858] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 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 b0 ff ff ff f7 d8 64 89 01 48 [ 45.340439][ T1858] RSP: 002b:00007f700614aee8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 45.351225][ T1858] RAX: ffffffffffffffda RBX: 00007f700614af80 RCX: 00007f70065ca22a [ 45.359187][ T1858] RDX: 0000000020000000 RSI: 00000000200001c0 RDI: 00007f700614af40 [ 45.367480][ T1858] RBP: 0000000020000000 R08: 00007f700614af80 R09: 000000000300041c [ 45.376605][ T1858] R10: 000000000300041c R11: 0000000000000246 R12: 00000000200001c0 [ 45.385252][ T1858] R13: 00007f700614af40 R14: 00000000000002de R15: 0000000020000100 [ 45.393234][ T1858] [ 45.396355][ T1858] Modules linked in: [ 45.400554][ T1858] CR2: 0000000000000040 [ 45.404938][ T1858] ---[ end trace d0833866297b1991 ]--- [ 45.410378][ T1858] RIP: 0010:hfs_find_init+0x14/0xa0 [ 45.415894][ T1858] Code: 21 f0 89 07 e9 5b ff ff ff b8 fe ff ff ff eb 8c cc cc cc cc cc cc 55 48 89 f5 53 48 89 fb 48 89 7e 10 48 c7 46 18 00 00 00 00 <8b> 47 40 be c0 0c 00 00 8d 7c 00 04 e8 2b 44 e6 ff 48 85 c0 74 60 [ 45.436549][ T1858] RSP: 0018:ffffc90001a27ad0 EFLAGS: 00010246 [ 45.443657][ T1858] RAX: ffff88810a170000 RBX: 0000000000000000 RCX: 0000000000000000 [ 45.452119][ T1858] RDX: 0000000000000000 RSI: ffffc90001a27ae8 RDI: 0000000000000000 [ 45.461117][ T1858] RBP: ffffc90001a27ae8 R08: 00000000000005b4 R09: ffffffff82cf84b0 [ 45.470123][ T1858] R10: 0000000000000000 R11: ffffea0005af8400 R12: 0000000000000000 [ 45.478158][ T1858] R13: 0000000000000000 R14: ffff88817c147000 R15: 0000000000000000 [ 45.486755][ T1858] FS: 00007f700614b6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 [ 45.495866][ T1858] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.502786][ T1858] CR2: 0000000000000040 CR3: 0000000178f4f000 CR4: 00000000003506e0 [ 45.510832][ T1858] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 45.519082][ T1858] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 45.527656][ T1858] Kernel panic - not syncing: Fatal exception [ 45.534506][ T1858] Kernel Offset: disabled [ 45.539128][ T1858] Rebooting in 86400 seconds..