EXT4-fs error (device loop3): ext4_xattr_ibody_get:619: inode #19: comm syz-executor.3: corrupted in-inode xattr EXT4-fs error (device loop3): ext4_xattr_ibody_get:619: inode #19: comm syz-executor.3: 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 ffff88811394701c by task syz-executor.3/2879 CPU: 1 PID: 2879 Comm: syz-executor.3 Not tainted 6.1.25-syzkaller-00044-g060ebb378d1c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023 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: 0033:0x7f760527cae9 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:00007f75fc2de0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f760539c050 RCX: 00007f760527cae9 RDX: 0000000000000090 RSI: 0000000020000180 RDI: 0000000000000008 RBP: 00007f76052c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f760539c050 R15: 00007ffd375e6918 Allocated by task 2270: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:333 kasan_slab_alloc include/linux/kasan.h:202 [inline] slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:768 slab_alloc_node mm/slub.c:3418 [inline] slab_alloc mm/slub.c:3426 [inline] __kmem_cache_alloc_lru mm/slub.c:3433 [inline] kmem_cache_alloc+0x175/0x2c0 mm/slub.c:3442 vm_area_alloc+0x24/0x1b0 kernel/fork.c:494 mmap_region+0xf01/0x2390 mm/mmap.c:2823 do_mmap+0x853/0xe30 mm/mmap.c:1459 vm_mmap_pgoff+0x208/0x430 mm/util.c:524 ksys_mmap_pgoff+0xed/0x1e0 mm/mmap.c:1505 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:93 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:86 [inline] __x64_sys_mmap+0x103/0x120 arch/x86/kernel/sys_x86_64.c:86 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 Freed by task 2270: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:516 ____kasan_slab_free+0x131/0x180 mm/kasan/common.c:241 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:249 kasan_slab_free include/linux/kasan.h:178 [inline] slab_free_hook mm/slub.c:1744 [inline] slab_free_freelist_hook mm/slub.c:1770 [inline] slab_free mm/slub.c:3681 [inline] kmem_cache_free+0x291/0x510 mm/slub.c:3703 __vm_area_free+0x83/0x130 kernel/fork.c:535 remove_vma mm/mmap.c:148 [inline] exit_mmap+0x50d/0x8a0 mm/mmap.c:3339 __mmput+0x95/0x310 kernel/fork.c:1272 mmput+0x56/0x170 kernel/fork.c:1295 exit_mm kernel/exit.c:566 [inline] do_exit+0xb29/0x2b80 kernel/exit.c:862 do_group_exit+0x21a/0x2d0 kernel/exit.c:1025 __do_sys_exit_group kernel/exit.c:1036 [inline] __se_sys_exit_group kernel/exit.c:1034 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1034 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 The buggy address belongs to the object at ffff888113947000 which belongs to the cache vm_area_struct of size 200 The buggy address is located 28 bytes inside of 200-byte region [ffff888113947000, ffff8881139470c8) The buggy address belongs to the physical page: page:ffffea00044e51c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x113947 flags: 0x4000000000000200(slab|zone=1) raw: 4000000000000200 ffffea0004745400 dead000000000004 ffff888100297200 raw: 0000000000000000 00000000000f000f 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 407, tgid 407 (syz-executor.2), ts 131389323298, free_ts 131387093524 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 allocate_slab mm/slub.c:1959 [inline] new_slab+0xce/0x4c0 mm/slub.c:2012 ___slab_alloc+0x6f9/0xb80 mm/slub.c:3200 __slab_alloc+0x5d/0xa0 mm/slub.c:3299 slab_alloc_node mm/slub.c:3384 [inline] slab_alloc mm/slub.c:3426 [inline] __kmem_cache_alloc_lru mm/slub.c:3433 [inline] kmem_cache_alloc+0x1b9/0x2c0 mm/slub.c:3442 vm_area_dup+0x27/0x290 kernel/fork.c:509 dup_mmap kernel/fork.c:718 [inline] dup_mm+0xbc4/0x19e0 kernel/fork.c:1615 copy_mm+0xd6/0x170 kernel/fork.c:1664 copy_process+0x12ac/0x3490 kernel/fork.c:2344 kernel_clone+0x229/0x890 kernel/fork.c:2764 __do_sys_clone kernel/fork.c:2907 [inline] __se_sys_clone kernel/fork.c:2891 [inline] __x64_sys_clone+0x231/0x280 kernel/fork.c:2891 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 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 exit_mmap+0x3e5/0x8a0 mm/mmap.c:3329 __mmput+0x95/0x310 kernel/fork.c:1272 mmput+0x56/0x170 kernel/fork.c:1295 exit_mm kernel/exit.c:566 [inline] do_exit+0xb29/0x2b80 kernel/exit.c:862 do_group_exit+0x21a/0x2d0 kernel/exit.c:1025 get_signal+0x169d/0x1820 kernel/signal.c:2875 arch_do_signal_or_restart+0xb0/0x16f0 arch/x86/kernel/signal.c:869 exit_to_user_mode_loop+0x6b/0xa0 kernel/entry/common.c:168 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x26/0x130 kernel/entry/common.c:297 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 Memory state around the buggy address: ffff888113946f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888113946f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888113947000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888113947080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc ffff888113947100: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================