Warning: Permanently added '10.128.10.44' (ED25519) to the list of known hosts. 2025/05/27 19:31:26 ignoring optional flag "sandboxArg"="0" 2025/05/27 19:31:26 ignoring optional flag "type"="gce" 2025/05/27 19:31:26 parsed 1 programs [ 73.327868][ T1448] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k 2025/05/27 19:31:34 executed programs: 0 2025/05/27 19:31:40 executed programs: 2 [ 86.352675][ T2428] loop0: detected capacity change from 0 to 1024 [ 86.373526][ T2428] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. [ 86.431719][ T2428] loop0: detected capacity change from 1024 to 1023 [ 86.442927][ T1974] EXT4-fs error (device loop0): ext4_readdir:264: inode #2: block 16: comm syz-executor: path /0/bus: bad entry in directory: rec_len is smaller than minimal - offset=980, inode=0, rec_len=0, size=1024 fake=0 [ 86.463965][ T1974] ================================================================== [ 86.472028][ T1974] BUG: KASAN: slab-use-after-free in ext4_read_inline_data+0x18f/0x280 [ 86.480246][ T1974] Read of size 68 at addr ffff888116df751a by task syz-executor/1974 [ 86.488277][ T1974] [ 86.490616][ T1974] CPU: 1 UID: 0 PID: 1974 Comm: syz-executor Not tainted 6.15.0-syzkaller #0 PREEMPT(undef) [ 86.490622][ T1974] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 86.490629][ T1974] Call Trace: [ 86.490633][ T1974] [ 86.490636][ T1974] dump_stack_lvl+0xf4/0x170 [ 86.490645][ T1974] ? __pfx_dump_stack_lvl+0x10/0x10 [ 86.490649][ T1974] ? rcu_is_watching+0x1f/0xa0 [ 86.490655][ T1974] ? __virt_addr_valid+0x176/0x2b0 [ 86.490660][ T1974] ? lock_release+0x42/0x2f0 [ 86.490663][ T1974] ? lock_acquire+0x69/0x210 [ 86.490666][ T1974] ? _raw_spin_lock_irqsave+0xa5/0xe0 [ 86.490672][ T1974] ? __virt_addr_valid+0x176/0x2b0 [ 86.490675][ T1974] ? __virt_addr_valid+0x262/0x2b0 [ 86.490678][ T1974] print_report+0xd2/0x2b0 [ 86.490683][ T1974] ? ext4_read_inline_data+0x18f/0x280 [ 86.490687][ T1974] kasan_report+0x118/0x150 [ 86.490693][ T1974] ? ext4_read_inline_data+0x18f/0x280 [ 86.490697][ T1974] kasan_check_range+0x2b0/0x2c0 [ 86.490701][ T1974] ? ext4_read_inline_data+0x18f/0x280 [ 86.490705][ T1974] __asan_memcpy+0x29/0x70 [ 86.490709][ T1974] ext4_read_inline_data+0x18f/0x280 [ 86.490713][ T1974] ext4_read_inline_dir+0x2cd/0x940 [ 86.490717][ T1974] ? rcu_is_watching+0x1f/0xa0 [ 86.490721][ T1974] ? __pfx_ext4_read_inline_dir+0x10/0x10 [ 86.490725][ T1974] ? __lock_acquire+0x74/0x4c0 [ 86.490729][ T1974] ext4_readdir+0x252/0x2d10 [ 86.490735][ T1974] ? rcu_is_watching+0x1f/0xa0 [ 86.490739][ T1974] ? count_memcg_event_mm+0x88/0x190 [ 86.490746][ T1974] ? __pfx_ext4_readdir+0x10/0x10 [ 86.490750][ T1974] ? rwsem_read_trylock+0x18e/0x210 [ 86.490756][ T1974] ? __pfx_rwsem_read_trylock+0x10/0x10 [ 86.490761][ T1974] ? iterate_dir+0xb5/0x4c0 [ 86.490767][ T1974] ? down_read_killable+0x120/0x1a0 [ 86.490772][ T1974] iterate_dir+0x1aa/0x4c0 [ 86.490778][ T1974] __se_sys_getdents64+0xd3/0x1b0 [ 86.490781][ T1974] ? __pfx___se_sys_getdents64+0x10/0x10 [ 86.490784][ T1974] ? exc_page_fault+0x62/0xa0 [ 86.490789][ T1974] ? __pfx_filldir64+0x10/0x10 [ 86.490792][ T1974] ? do_user_addr_fault+0x378/0xc30 [ 86.490797][ T1974] do_syscall_64+0x8f/0x250 [ 86.490802][ T1974] ? fpregs_assert_state_consistent+0x48/0x60 [ 86.490806][ T1974] ? clear_bhb_loop+0x40/0x90 [ 86.490810][ T1974] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 86.490814][ T1974] RIP: 0033:0x7eff01d09333 [ 86.490823][ T1974] Code: c1 66 0f 1f 44 00 00 48 83 c4 08 48 89 ef 5b 5d e9 02 45 f8 ff 66 90 b8 ff ff ff 7f 48 39 c2 48 0f 47 d0 b8 d9 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 05 c3 0f 1f 40 00 48 c7 c2 a8 ff ff ff f7 d8 [ 86.490826][ T1974] RSP: 002b:00007ffca3b20c88 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9 [ 86.490834][ T1974] RAX: ffffffffffffffda RBX: 0000555581250520 RCX: 00007eff01d09333 [ 86.490837][ T1974] RDX: 0000000000008000 RSI: 0000555581250520 RDI: 0000000000000006 [ 86.490840][ T1974] RBP: 00005555812504f4 R08: 0000000000000000 R09: 0000000000000000 [ 86.490842][ T1974] R10: 0000000000001000 R11: 0000000000000293 R12: ffffffffffffffa8 [ 86.490845][ T1974] R13: 0000000000000016 R14: 00005555812504f0 R15: 00007ffca3b24020 [ 86.490849][ T1974] [ 86.490850][ T1974] [ 86.790133][ T1974] Allocated by task 1974: [ 86.794447][ T1974] kasan_save_track+0x3e/0x80 [ 86.799111][ T1974] __kasan_slab_alloc+0x6c/0x80 [ 86.803950][ T1974] kmem_cache_alloc_noprof+0x1b1/0x400 [ 86.809391][ T1974] alloc_vfsmnt+0x1e/0x4a0 [ 86.813785][ T1974] clone_mnt+0x62/0xb50 [ 86.817915][ T1974] copy_tree+0x3ad/0xb20 [ 86.822126][ T1974] copy_mnt_ns+0x129/0x750 [ 86.826532][ T1974] create_new_namespaces+0xca/0x690 [ 86.831731][ T1974] unshare_nsproxy_namespaces+0xe0/0x120 [ 86.837362][ T1974] ksys_unshare+0x3b6/0x720 [ 86.841851][ T1974] __x64_sys_unshare+0x33/0x40 [ 86.847029][ T1974] do_syscall_64+0x8f/0x250 [ 86.851691][ T1974] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 86.857559][ T1974] [ 86.859858][ T1974] Freed by task 15: [ 86.863637][ T1974] kasan_save_track+0x3e/0x80 [ 86.868288][ T1974] kasan_save_free_info+0x46/0x50 [ 86.873375][ T1974] __kasan_slab_free+0x62/0x70 [ 86.878107][ T1974] kmem_cache_free+0x175/0x460 [ 86.882846][ T1974] rcu_core+0xbf1/0x1530 [ 86.887059][ T1974] handle_softirqs+0x19a/0x500 [ 86.891791][ T1974] run_ksoftirqd+0x28/0x40 [ 86.896175][ T1974] smpboot_thread_fn+0x3f4/0x7d0 [ 86.901079][ T1974] kthread+0x59b/0x690 [ 86.905129][ T1974] ret_from_fork+0x136/0x2d0 [ 86.909692][ T1974] ret_from_fork_asm+0x1a/0x30 [ 86.914424][ T1974] [ 86.916734][ T1974] Last potentially related work creation: [ 86.922428][ T1974] kasan_save_stack+0x3e/0x60 [ 86.927077][ T1974] kasan_record_aux_stack+0xbd/0xd0 [ 86.932243][ T1974] call_rcu+0x141/0x7d0 [ 86.936395][ T1974] task_work_run+0x149/0x1e0 [ 86.940958][ T1974] exit_to_user_mode_loop+0xbf/0xd0 [ 86.946122][ T1974] do_syscall_64+0x181/0x250 [ 86.950678][ T1974] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 86.956537][ T1974] [ 86.958857][ T1974] Second to last potentially related work creation: [ 86.965420][ T1974] kasan_save_stack+0x3e/0x60 [ 86.970068][ T1974] kasan_record_aux_stack+0xbd/0xd0 [ 86.975232][ T1974] task_work_add+0x95/0x290 [ 86.979742][ T1974] mntput_no_expire+0x3fa/0x670 [ 86.984664][ T1974] namespace_unlock+0x53e/0x5b0 [ 86.989506][ T1974] path_umount+0xc96/0xd20 [ 86.993889][ T1974] __x64_sys_umount+0xe4/0x120 [ 86.998623][ T1974] do_syscall_64+0x8f/0x250 [ 87.003095][ T1974] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 87.008953][ T1974] [ 87.011250][ T1974] The buggy address belongs to the object at ffff888116df7500 [ 87.011250][ T1974] which belongs to the cache mnt_cache of size 368 [ 87.025105][ T1974] The buggy address is located 26 bytes inside of [ 87.025105][ T1974] freed 368-byte region [ffff888116df7500, ffff888116df7670) [ 87.038795][ T1974] [ 87.041114][ T1974] The buggy address belongs to the physical page: [ 87.047687][ T1974] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x116df6 [ 87.056604][ T1974] head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 87.065246][ T1974] memcg:ffff888107ffd201 [ 87.069461][ T1974] anon flags: 0x200000000000040(head|node=0|zone=2) [ 87.076215][ T1974] page_type: f5(slab) [ 87.080165][ T1974] raw: 0200000000000040 ffff888100e83c80 ffffea000453d180 0000000000000003 [ 87.088716][ T1974] raw: 0000000000000000 0000000080120012 00000000f5000000 ffff888107ffd201 [ 87.097270][ T1974] head: 0200000000000040 ffff888100e83c80 ffffea000453d180 0000000000000003 [ 87.105910][ T1974] head: 0000000000000000 0000000080120012 00000000f5000000 ffff888107ffd201 [ 87.114810][ T1974] head: 0200000000000001 ffffea00045b7d81 00000000ffffffff 00000000ffffffff [ 87.123458][ T1974] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000002 [ 87.132093][ T1974] page dumped because: kasan: bad access detected [ 87.138487][ T1974] page_owner tracks the page as allocated [ 87.144177][ T1974] page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 970, tgid 970 (syz-executor), ts 47194335666, free_ts 47186377498 [ 87.165322][ T1974] post_alloc_hook+0x168/0x1a0 [ 87.170148][ T1974] get_page_from_freelist+0x2d16/0x2ee0 [ 87.175668][ T1974] __alloc_frozen_pages_noprof+0x26b/0x460 [ 87.181447][ T1974] alloc_pages_mpol+0xcb/0x270 [ 87.186178][ T1974] allocate_slab+0x8a/0x350 [ 87.190652][ T1974] ___slab_alloc+0x9dc/0x10e0 [ 87.195296][ T1974] kmem_cache_alloc_noprof+0x26e/0x400 [ 87.200725][ T1974] alloc_vfsmnt+0x1e/0x4a0 [ 87.205116][ T1974] clone_mnt+0x62/0xb50 [ 87.209243][ T1974] copy_tree+0x3ad/0xb20 [ 87.213562][ T1974] copy_mnt_ns+0x129/0x750 [ 87.217982][ T1974] create_new_namespaces+0xca/0x690 [ 87.223573][ T1974] unshare_nsproxy_namespaces+0xe0/0x120 [ 87.229188][ T1974] ksys_unshare+0x3b6/0x720 [ 87.233672][ T1974] __x64_sys_unshare+0x33/0x40 [ 87.238419][ T1974] do_syscall_64+0x8f/0x250 [ 87.243068][ T1974] page last free pid 901 tgid 901 stack trace: [ 87.249190][ T1974] __free_frozen_pages+0xa1a/0xbe0 [ 87.254273][ T1974] __mmdrop+0x50/0x2a0 [ 87.258323][ T1974] finish_task_switch+0x397/0x670 [ 87.263317][ T1974] __schedule+0x151d/0x23c0 [ 87.267789][ T1974] schedule+0x112/0x2f0 [ 87.271910][ T1974] schedule_hrtimeout_range_clock+0x11a/0x260 [ 87.277947][ T1974] poll_schedule_timeout+0x6f/0x100 [ 87.283117][ T1974] do_select+0x10d2/0x11f0 [ 87.287500][ T1974] core_sys_select+0x404/0x5d0 [ 87.292233][ T1974] __se_sys_pselect6+0x1d2/0x250 [ 87.297138][ T1974] do_syscall_64+0x8f/0x250 [ 87.301616][ T1974] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 87.307483][ T1974] [ 87.309784][ T1974] Memory state around the buggy address: [ 87.315410][ T1974] ffff888116df7400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 87.323460][ T1974] ffff888116df7480: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 87.331497][ T1974] >ffff888116df7500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 87.339543][ T1974] ^ [ 87.344370][ T1974] ffff888116df7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 87.352405][ T1974] ffff888116df7600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 87.360452][ T1974] ================================================================== [ 87.368730][ T1974] Kernel panic - not syncing: KASAN: panic_on_warn set ... [ 87.376139][ T1974] Kernel Offset: disabled [ 87.380448][ T1974] Rebooting in 86400 seconds..