Warning: Permanently added '10.128.1.132' (ED25519) to the list of known hosts. 2026/01/03 00:07:06 ignoring optional flag "type"="gce" 2026/01/03 00:07:06 parsed 1 programs [ 66.986457][ T1882] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k 2026/01/03 00:07:13 executed programs: 0 2026/01/03 00:07:18 executed programs: 2 [ 78.910276][ T2833] loop0: detected capacity change from 0 to 512 [ 78.928897][ T2833] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. [ 79.003722][ T2833] loop0: detected capacity change from 512 to 511 [ 79.016474][ T2384] 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 [ 79.037313][ T2384] ================================================================== [ 79.045362][ T2384] BUG: KASAN: use-after-free in ext4_read_inline_data+0x18f/0x280 [ 79.053329][ T2384] Read of size 324 at addr ffff88812a21fc05 by task syz-executor/2384 [ 79.061451][ T2384] [ 79.063763][ T2384] CPU: 1 UID: 0 PID: 2384 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(none) [ 79.063769][ T2384] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 [ 79.063777][ T2384] Call Trace: [ 79.063782][ T2384] [ 79.063784][ T2384] dump_stack_lvl+0x52/0x80 [ 79.063792][ T2384] print_report+0xca/0x240 [ 79.063797][ T2384] ? ext4_read_inline_data+0x18f/0x280 [ 79.063803][ T2384] kasan_report+0x118/0x150 [ 79.063810][ T2384] ? ext4_read_inline_data+0x18f/0x280 [ 79.063815][ T2384] kasan_check_range+0x2b0/0x2c0 [ 79.063819][ T2384] ? ext4_read_inline_data+0x18f/0x280 [ 79.063823][ T2384] __asan_memcpy+0x29/0x70 [ 79.063828][ T2384] ext4_read_inline_data+0x18f/0x280 [ 79.063833][ T2384] ext4_inlinedir_to_tree+0x2d8/0xae0 [ 79.063837][ T2384] ? save_stack+0xef/0x1c0 [ 79.063843][ T2384] ? __pfx_ext4_inlinedir_to_tree+0x10/0x10 [ 79.063851][ T2384] ? post_alloc_hook+0x16d/0x190 [ 79.063856][ T2384] ? get_page_from_freelist+0x297f/0x2af0 [ 79.063860][ T2384] ext4_htree_fill_tree+0x3d9/0xf70 [ 79.063867][ T2384] ? __pfx_ext4_htree_fill_tree+0x10/0x10 [ 79.063872][ T2384] ? inode_query_iversion+0xbe/0x130 [ 79.063877][ T2384] ? __lock_acquire+0x74/0x4c0 [ 79.063884][ T2384] ext4_readdir+0x24e3/0x2fc0 [ 79.063890][ T2384] ? __mutex_lock+0x55d/0x1d50 [ 79.063897][ T2384] ? __pfx___mutex_lock+0x10/0x10 [ 79.063901][ T2384] ? handle_mm_fault+0x1d17/0x2320 [ 79.063907][ T2384] ? __pfx_ext4_readdir+0x10/0x10 [ 79.063911][ T2384] ? rwsem_read_trylock+0x18e/0x210 [ 79.063916][ T2384] ? __pfx_rwsem_read_trylock+0x10/0x10 [ 79.063921][ T2384] ? iterate_dir+0xb5/0x4c0 [ 79.063924][ T2384] ? down_read_killable+0x120/0x1a0 [ 79.063928][ T2384] iterate_dir+0x1aa/0x4c0 [ 79.063932][ T2384] __se_sys_getdents64+0xd3/0x1b0 [ 79.063936][ T2384] ? __pfx___se_sys_getdents64+0x10/0x10 [ 79.063939][ T2384] ? exc_page_fault+0x62/0xa0 [ 79.063944][ T2384] ? __pfx_filldir64+0x10/0x10 [ 79.063948][ T2384] ? do_user_addr_fault+0x378/0xc30 [ 79.063954][ T2384] do_syscall_64+0x85/0x2e0 [ 79.063959][ T2384] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 79.063963][ T2384] RIP: 0033:0x7f64b8e9c013 [ 79.063969][ T2384] 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 [ 79.063973][ T2384] RSP: 002b:00007ffc6a938cb8 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9 [ 79.063982][ T2384] RAX: ffffffffffffffda RBX: 000055558e5da520 RCX: 00007f64b8e9c013 [ 79.063985][ T2384] RDX: 0000000000008000 RSI: 000055558e5da520 RDI: 0000000000000006 [ 79.063988][ T2384] RBP: 000055558e5da4f4 R08: 0000000000000000 R09: 0000000000000000 [ 79.063991][ T2384] R10: 0000000000001000 R11: 0000000000000293 R12: ffffffffffffffa8 [ 79.063994][ T2384] R13: 0000000000000016 R14: 000055558e5da4f0 R15: 00007ffc6a93c050 [ 79.063998][ T2384] [ 79.063999][ T2384] [ 79.343436][ T2384] The buggy address belongs to the physical page: [ 79.349832][ T2384] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x1d0 pfn:0x12a21f [ 79.358915][ T2384] flags: 0x200000000000000(node=0|zone=2) [ 79.364618][ T2384] raw: 0200000000000000 ffffea0004a88388 ffffea0004a88b48 0000000000000000 [ 79.373166][ T2384] raw: 00000000000001d0 0000000000000000 00000000ffffffff 0000000000000000 [ 79.381712][ T2384] page dumped because: kasan: bad access detected [ 79.388112][ T2384] page_owner tracks the page as freed [ 79.393456][ T2384] page last allocated via order 0, migratetype Movable, gfp_mask 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 2086, tgid 2086 (modprobe), ts 69848981481, free_ts 69851719503 [ 79.410868][ T2384] post_alloc_hook+0x15a/0x190 [ 79.415633][ T2384] get_page_from_freelist+0x297f/0x2af0 [ 79.421169][ T2384] __alloc_frozen_pages_noprof+0x26b/0x460 [ 79.426941][ T2384] alloc_pages_mpol+0xcb/0x270 [ 79.431689][ T2384] vma_alloc_folio_noprof+0x288/0x400 [ 79.437064][ T2384] folio_prealloc+0x24/0xf0 [ 79.441545][ T2384] do_wp_page+0xc2d/0x2ef0 [ 79.445925][ T2384] handle_mm_fault+0x872/0x2320 [ 79.450740][ T2384] do_user_addr_fault+0x31a/0xc30 [ 79.455745][ T2384] exc_page_fault+0x62/0xa0 [ 79.460303][ T2384] asm_exc_page_fault+0x26/0x30 [ 79.465128][ T2384] page last free pid 2086 tgid 2086 stack trace: [ 79.471426][ T2384] free_unref_folios+0xcdd/0x12d0 [ 79.476418][ T2384] folios_put_refs+0x319/0x400 [ 79.481158][ T2384] free_pages_and_swap_cache+0x20d/0x3c0 [ 79.486765][ T2384] tlb_flush_mmu+0x2ba/0x500 [ 79.491330][ T2384] tlb_finish_mmu+0xaa/0x190 [ 79.495887][ T2384] exit_mmap+0x374/0x830 [ 79.500181][ T2384] __mmput+0x62/0x290 [ 79.504216][ T2384] exit_mm+0x11b/0x1b0 [ 79.508254][ T2384] do_exit+0x4f6/0x1d40 [ 79.512374][ T2384] do_group_exit+0x1b1/0x280 [ 79.516929][ T2384] __x64_sys_exit_group+0x3f/0x40 [ 79.522008][ T2384] __pfx_local_irq_disable_exit_to_user+0x0/0x10 [ 79.528307][ T2384] do_syscall_64+0x85/0x2e0 [ 79.532780][ T2384] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 79.538725][ T2384] [ 79.541062][ T2384] Memory state around the buggy address: [ 79.546691][ T2384] ffff88812a21fb00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 79.554808][ T2384] ffff88812a21fb80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 79.562834][ T2384] >ffff88812a21fc00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 79.570858][ T2384] ^ [ 79.574894][ T2384] ffff88812a21fc80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 79.582920][ T2384] ffff88812a21fd00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 79.590956][ T2384] ================================================================== [ 79.599375][ T2384] Kernel panic - not syncing: KASAN: panic_on_warn set ... [ 79.607014][ T2384] Kernel Offset: disabled [ 79.611321][ T2384] Rebooting in 86400 seconds..