loop0: detected capacity change from 0 to 2048 EXT4-fs (loop0): mounted filesystem without journal. Quota mode: none. EXT4-fs error (device loop0): ext4_xattr_ibody_get:619: inode #18: comm syz-executor.0: corrupted in-inode xattr ================================================================== BUG: KASAN: use-after-free in get_max_inline_xattr_value_size+0x36e/0x510 fs/ext4/inline.c:62 Read of size 4 at addr ffff888124cfd004 by task syz-executor.0/359 CPU: 1 PID: 359 Comm: syz-executor.0 Not tainted 6.1.25-syzkaller-00880-g5ef132d5643b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0x158/0x4e0 mm/kasan/report.c:427 kasan_report+0x13c/0x170 mm/kasan/report.c:531 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:350 get_max_inline_xattr_value_size+0x36e/0x510 fs/ext4/inline.c:62 ext4_get_max_inline_size+0x13d/0x1f0 fs/ext4/inline.c:113 ext4_try_to_write_inline_data+0xd3/0x1420 fs/ext4/inline.c:663 ext4_write_begin+0x200/0xfb0 fs/ext4/inode.c:1179 ext4_da_write_begin+0x2ff/0x920 fs/ext4/inode.c:2987 generic_perform_write+0x2f9/0x5c0 mm/filemap.c:3766 ext4_buffered_write_iter+0x360/0x640 fs/ext4/file.c:285 ext4_file_write_iter+0x194/0x1cf0 call_write_iter include/linux/fs.h:2215 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x902/0xeb0 fs/read_write.c:584 ksys_write+0x199/0x2c0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __x64_sys_write+0x7b/0x90 fs/read_write.c:646 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f41d3a7cb29 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f41d47b60c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f41d3b9bf80 RCX: 00007f41d3a7cb29 RDX: 0000000000000001 RSI: 0000000020000280 RDI: 0000000000000004 RBP: 00007f41d3ac847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f41d3b9bf80 R15: 00007ffc22602028 The buggy address belongs to the physical page: page:ffffea0004933f40 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x124cfd flags: 0x4000000000000000(zone=1) raw: 4000000000000000 ffffea0004933f88 ffffea00049343c8 0000000000000000 raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 0, migratetype Movable, gfp_mask 0x8140dca(GFP_HIGHUSER_MOVABLE|__GFP_COMP|__GFP_ZERO|__GFP_CMA), pid 359, tgid 358 (syz-executor.0), ts 39316586000, free_ts 39321193389 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x213/0x220 mm/page_alloc.c:2582 prep_new_page+0x1b/0x110 mm/page_alloc.c:2589 get_page_from_freelist+0x2762/0x27f0 mm/page_alloc.c:4387 __alloc_pages+0x3a1/0x780 mm/page_alloc.c:5664 __folio_alloc+0x15/0x40 mm/page_alloc.c:5696 __folio_alloc_node include/linux/gfp.h:245 [inline] folio_alloc include/linux/gfp.h:274 [inline] alloc_page_vma include/linux/gfp.h:283 [inline] do_anonymous_page mm/memory.c:4170 [inline] handle_pte_fault mm/memory.c:5049 [inline] __handle_mm_fault mm/memory.c:5193 [inline] handle_mm_fault+0x1fb0/0x2f40 mm/memory.c:5333 do_user_addr_fault arch/x86/mm/fault.c:1363 [inline] handle_page_fault arch/x86/mm/fault.c:1504 [inline] exc_page_fault+0x3a6/0x6e0 arch/x86/mm/fault.c:1560 asm_exc_page_fault+0x27/0x30 arch/x86/include/asm/idtentry.h:570 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1494 [inline] free_pcp_prepare mm/page_alloc.c:1568 [inline] free_unref_page_prepare+0x83d/0x850 mm/page_alloc.c:3486 free_unref_page_list+0xf6/0x6c0 mm/page_alloc.c:3628 release_pages+0xf7f/0xfe0 mm/swap.c:1055 free_pages_and_swap_cache+0x8a/0xa0 mm/swap_state.c:314 tlb_batch_pages_flush mm/mmu_gather.c:59 [inline] tlb_flush_mmu_free mm/mmu_gather.c:254 [inline] tlb_flush_mmu mm/mmu_gather.c:261 [inline] tlb_finish_mmu+0x1e0/0x3f0 mm/mmu_gather.c:361 unmap_region+0x2c1/0x310 mm/mmap.c:2389 do_mas_align_munmap+0xd05/0x1400 mm/mmap.c:2654 do_mas_munmap+0x23e/0x2b0 mm/mmap.c:2712 __vm_munmap+0x263/0x3a0 mm/mmap.c:3002 __do_sys_munmap mm/mmap.c:3028 [inline] __se_sys_munmap mm/mmap.c:3024 [inline] __x64_sys_munmap+0x6b/0x80 mm/mmap.c:3024 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff888124cfcf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888124cfcf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888124cfd000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888124cfd080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888124cfd100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== EXT4-fs error (device loop0): ext4_read_block_bitmap_nowait:438: comm syz-executor.0: Invalid block bitmap block 4294967295 in block_group 0