Warning: Permanently added '10.128.1.231' (ED25519) to the list of known hosts. 2025/09/22 04:50:42 ignoring optional flag "type"="gce" 2025/09/22 04:50:43 parsed 1 programs [ 64.806425][ T1422] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k 2025/09/22 04:50:50 executed programs: 0 2025/09/22 04:50:56 executed programs: 2 [ 77.562081][ T2374] loop0: detected capacity change from 0 to 512 [ 77.575009][ T2374] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. [ 77.594984][ T2374] loop0: detected capacity change from 512 to 511 [ 77.606886][ T1925] EXT4-fs error (device loop0): htree_dirblock_to_tree:1080: inode #2: block 21: comm syz-executor: bad entry in directory: directory entry overrun - offset=1004, inode=0, rec_len=1000, size=1024 fake=0 [ 77.627533][ T1925] ================================================================== [ 77.635575][ T1925] BUG: KASAN: use-after-free in ext4_read_inline_data+0x18f/0x280 [ 77.643353][ T1925] Read of size 324 at addr ffff88812e106c05 by task syz-executor/1925 [ 77.651466][ T1925] [ 77.653771][ T1925] CPU: 0 UID: 0 PID: 1925 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(none) [ 77.653777][ T1925] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 [ 77.653781][ T1925] Call Trace: [ 77.653788][ T1925] [ 77.653791][ T1925] dump_stack_lvl+0xf4/0x170 [ 77.653800][ T1925] ? __pfx_dump_stack_lvl+0x10/0x10 [ 77.653805][ T1925] ? rcu_is_watching+0x1f/0xa0 [ 77.653809][ T1925] ? __virt_addr_valid+0x176/0x2b0 [ 77.653814][ T1925] ? lock_release+0x42/0x2f0 [ 77.653818][ T1925] ? lock_acquire+0x69/0x210 [ 77.653821][ T1925] ? __virt_addr_valid+0x262/0x2b0 [ 77.653825][ T1925] print_report+0xca/0x240 [ 77.653830][ T1925] ? ext4_read_inline_data+0x18f/0x280 [ 77.653835][ T1925] kasan_report+0x118/0x150 [ 77.653842][ T1925] ? ext4_read_inline_data+0x18f/0x280 [ 77.653846][ T1925] kasan_check_range+0x2b0/0x2c0 [ 77.653851][ T1925] ? ext4_read_inline_data+0x18f/0x280 [ 77.653855][ T1925] __asan_memcpy+0x29/0x70 [ 77.653860][ T1925] ext4_read_inline_data+0x18f/0x280 [ 77.653865][ T1925] ext4_inlinedir_to_tree+0x2d8/0xab0 [ 77.653869][ T1925] ? __update_page_owner_handle+0x54/0x390 [ 77.653875][ T1925] ? __pfx_ext4_inlinedir_to_tree+0x10/0x10 [ 77.653883][ T1925] ext4_htree_fill_tree+0x3cb/0xef0 [ 77.653890][ T1925] ? __pfx_ext4_htree_fill_tree+0x10/0x10 [ 77.653894][ T1925] ? __pfx_css_rstat_updated+0x10/0x10 [ 77.653900][ T1925] ? inode_query_iversion+0xbe/0x130 [ 77.653905][ T1925] ? __lock_acquire+0x74/0x4c0 [ 77.653909][ T1925] ext4_readdir+0x233a/0x2d10 [ 77.653916][ T1925] ? handle_mm_fault+0x1d0b/0x2310 [ 77.653922][ T1925] ? __pfx_ext4_readdir+0x10/0x10 [ 77.653926][ T1925] ? rwsem_read_trylock+0x18e/0x210 [ 77.653932][ T1925] ? lock_vma_under_rcu+0x11c/0x200 [ 77.653935][ T1925] ? __pfx_rwsem_read_trylock+0x10/0x10 [ 77.653941][ T1925] ? iterate_dir+0xb5/0x4c0 [ 77.653946][ T1925] ? down_read_killable+0x120/0x1a0 [ 77.653950][ T1925] iterate_dir+0x1aa/0x4c0 [ 77.653955][ T1925] __se_sys_getdents64+0xd3/0x1b0 [ 77.653959][ T1925] ? __pfx___se_sys_getdents64+0x10/0x10 [ 77.653962][ T1925] ? exc_page_fault+0x62/0xa0 [ 77.653967][ T1925] ? __pfx_filldir64+0x10/0x10 [ 77.653971][ T1925] ? do_user_addr_fault+0x378/0xc30 [ 77.653977][ T1925] do_syscall_64+0x8f/0x250 [ 77.653981][ T1925] ? fpregs_assert_state_consistent+0x48/0x60 [ 77.653987][ T1925] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 77.653991][ T1925] RIP: 0033:0x7f40c5e7c013 [ 77.653996][ T1925] Code: c1 66 0f 1f 44 00 00 48 83 c4 08 48 89 ef 5b 5d e9 52 43 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 [ 77.654000][ T1925] RSP: 002b:00007ffc1caddb48 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9 [ 77.654009][ T1925] RAX: ffffffffffffffda RBX: 0000555559860520 RCX: 00007f40c5e7c013 [ 77.654012][ T1925] RDX: 0000000000008000 RSI: 0000555559860520 RDI: 0000000000000006 [ 77.654015][ T1925] RBP: 00005555598604f4 R08: 0000000000000000 R09: 0000000000000000 [ 77.654018][ T1925] R10: 0000000000001000 R11: 0000000000000293 R12: ffffffffffffffa8 [ 77.654020][ T1925] R13: 0000000000000016 R14: 00005555598604f0 R15: 00007ffc1cae0ee0 [ 77.654024][ T1925] [ 77.654026][ T1925] [ 77.960306][ T1925] The buggy address belongs to the physical page: [ 77.966699][ T1925] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x55a376b0b pfn:0x12e106 [ 77.976203][ T1925] flags: 0x200000000000000(node=0|zone=2) [ 77.981914][ T1925] raw: 0200000000000000 ffffea0004ad8608 ffffea0004b832c8 0000000000000000 [ 77.990460][ T1925] raw: 000000055a376b0b 0000000000000000 00000000ffffffff 0000000000000000 [ 77.999012][ T1925] page dumped because: kasan: bad access detected [ 78.005400][ T1925] page_owner tracks the page as freed [ 78.010738][ T1925] page last allocated via order 0, migratetype Movable, gfp_mask 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 787, tgid 787 (udevd), ts 65387019511, free_ts 69009329273 [ 78.027624][ T1925] post_alloc_hook+0x168/0x1a0 [ 78.032383][ T1925] get_page_from_freelist+0x287a/0x2a30 [ 78.037901][ T1925] __alloc_frozen_pages_noprof+0x26b/0x460 [ 78.043674][ T1925] alloc_pages_mpol+0xcb/0x270 [ 78.048406][ T1925] vma_alloc_folio_noprof+0x288/0x400 [ 78.053744][ T1925] folio_prealloc+0x24/0xf0 [ 78.058213][ T1925] do_wp_page+0xc71/0x2eb0 [ 78.062594][ T1925] handle_mm_fault+0x851/0x2310 [ 78.067412][ T1925] do_user_addr_fault+0x31a/0xc30 [ 78.072402][ T1925] exc_page_fault+0x62/0xa0 [ 78.076872][ T1925] asm_exc_page_fault+0x26/0x30 [ 78.081701][ T1925] page last free pid 1462 tgid 1462 stack trace: [ 78.087991][ T1925] free_unref_folios+0xd04/0x1330 [ 78.092982][ T1925] folios_put_refs+0x319/0x400 [ 78.097799][ T1925] free_pages_and_swap_cache+0x20d/0x3c0 [ 78.103408][ T1925] tlb_flush_mmu+0x2ba/0x500 [ 78.107972][ T1925] tlb_finish_mmu+0xaa/0x190 [ 78.112584][ T1925] exit_mmap+0x382/0x850 [ 78.116805][ T1925] __mmput+0x62/0x290 [ 78.120757][ T1925] exit_mm+0x11b/0x1b0 [ 78.124826][ T1925] do_exit+0x506/0x1d50 [ 78.128963][ T1925] do_group_exit+0x1b1/0x280 [ 78.133526][ T1925] __x64_sys_exit_group+0x3f/0x40 [ 78.138520][ T1925] x64_sys_call+0x21f7/0x2200 [ 78.143175][ T1925] do_syscall_64+0x8f/0x250 [ 78.147653][ T1925] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 78.153513][ T1925] [ 78.155814][ T1925] Memory state around the buggy address: [ 78.161411][ T1925] ffff88812e106b00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 78.169447][ T1925] ffff88812e106b80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 78.177481][ T1925] >ffff88812e106c00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 78.185536][ T1925] ^ [ 78.189574][ T1925] ffff88812e106c80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 78.197600][ T1925] ffff88812e106d00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 78.205720][ T1925] ================================================================== [ 78.213924][ T1925] Kernel panic - not syncing: KASAN: panic_on_warn set ... [ 78.221198][ T1925] Kernel Offset: disabled [ 78.225497][ T1925] Rebooting in 86400 seconds..