loop8: detected capacity change from 0 to 512 EXT4-fs (loop8): Test dummy encryption mode enabled EXT4-fs (loop8): encrypted files will use data=ordered instead of data journaling mode EXT4-fs (loop8): 1 truncate cleaned up ================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x979/0x21d0 fs/ext4/xattr.c:1741 Read of size 18446744073709551572 at addr ffff888120710850 by task syz.8.4862/17831 CPU: 0 PID: 17831 Comm: syz.8.4862 Not tainted 6.1.138-syzkaller-00007-g0c5980110105 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: __dump_stack+0x21/0x24 lib/dump_stack.c:88 dump_stack_lvl+0xee/0x150 lib/dump_stack.c:106 print_address_description+0x71/0x210 mm/kasan/report.c:316 print_report+0x4a/0x60 mm/kasan/report.c:427 kasan_report+0x122/0x150 mm/kasan/report.c:531 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x280/0x290 mm/kasan/generic.c:189 memmove+0x2d/0x70 mm/kasan/shadow.c:54 ext4_xattr_set_entry+0x979/0x21d0 fs/ext4/xattr.c:1741 ext4_xattr_block_set+0xada/0x3270 fs/ext4/xattr.c:1988 ext4_xattr_move_to_block fs/ext4/xattr.c:2625 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2700 [inline] ext4_expand_extra_isize_ea+0xf30/0x1990 fs/ext4/xattr.c:2792 __ext4_expand_extra_isize+0x2fe/0x3e0 fs/ext4/inode.c:5967 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6010 [inline] __ext4_mark_inode_dirty+0x3cf/0x600 fs/ext4/inode.c:6088 __ext4_unlink+0x673/0xb00 fs/ext4/namei.c:3341 ext4_unlink+0x13a/0x3a0 fs/ext4/namei.c:3370 vfs_unlink+0x39f/0x630 fs/namei.c:4321 do_unlinkat+0x31f/0x6b0 fs/namei.c:4389 __do_sys_unlink fs/namei.c:4437 [inline] __se_sys_unlink fs/namei.c:4435 [inline] __x64_sys_unlink+0x49/0x50 fs/namei.c:4435 x64_sys_call+0x958/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:88 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f2b7a98e929 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2b7b790038 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 00007f2b7abb5fa0 RCX: 00007f2b7a98e929 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000180 RBP: 00007f2b7aa10b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f2b7abb5fa0 R15: 00007ffdff129f88 Allocated by task 17831: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_alloc_info+0x25/0x30 mm/kasan/generic.c:505 ____kasan_kmalloc mm/kasan/common.c:379 [inline] __kasan_kmalloc+0x95/0xb0 mm/kasan/common.c:388 kasan_kmalloc include/linux/kasan.h:212 [inline] __do_kmalloc_node mm/slab_common.c:938 [inline] __kmalloc_node_track_caller+0xb1/0x1e0 mm/slab_common.c:958 kmemdup+0x2b/0x60 mm/util.c:134 _Z7kmemdupPKvU17pass_object_size0mj include/linux/fortify-string.h:585 [inline] ext4_xattr_block_set+0x9dc/0x3270 fs/ext4/xattr.c:1936 ext4_xattr_move_to_block fs/ext4/xattr.c:2625 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2700 [inline] ext4_expand_extra_isize_ea+0xf30/0x1990 fs/ext4/xattr.c:2792 __ext4_expand_extra_isize+0x2fe/0x3e0 fs/ext4/inode.c:5967 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6010 [inline] __ext4_mark_inode_dirty+0x3cf/0x600 fs/ext4/inode.c:6088 __ext4_unlink+0x673/0xb00 fs/ext4/namei.c:3341 ext4_unlink+0x13a/0x3a0 fs/ext4/namei.c:3370 vfs_unlink+0x39f/0x630 fs/namei.c:4321 do_unlinkat+0x31f/0x6b0 fs/namei.c:4389 __do_sys_unlink fs/namei.c:4437 [inline] __se_sys_unlink fs/namei.c:4435 [inline] __x64_sys_unlink+0x49/0x50 fs/namei.c:4435 x64_sys_call+0x958/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:88 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff888120710800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 80 bytes inside of 1024-byte region [ffff888120710800, ffff888120710c00) The buggy address belongs to the physical page: page:ffffea000481c400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x120710 head:ffffea000481c400 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 ffffea0004220600 dead000000000002 ffff888100043080 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 286, tgid 286 (syz-executor), ts 28233463223, free_ts 27874457294 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1f5/0x210 mm/page_alloc.c:2637 prep_new_page+0x1c/0x110 mm/page_alloc.c:2644 get_page_from_freelist+0x2c7b/0x2cf0 mm/page_alloc.c:4539 __alloc_pages+0x19e/0x3a0 mm/page_alloc.c:5842 alloc_slab_page+0x6e/0xf0 include/linux/gfp.h:-1 allocate_slab mm/slub.c:1962 [inline] new_slab+0x98/0x3d0 mm/slub.c:2015 ___slab_alloc+0x6f6/0xb50 mm/slub.c:3203 __slab_alloc+0x5e/0xa0 mm/slub.c:3302 slab_alloc_node mm/slub.c:3387 [inline] __kmem_cache_alloc_node+0x203/0x2c0 mm/slub.c:3462 __do_kmalloc_node mm/slab_common.c:937 [inline] __kmalloc_node+0xa1/0x1e0 mm/slab_common.c:945 kmalloc_node include/linux/slab.h:589 [inline] kvmalloc_node+0x294/0x480 mm/util.c:592 kvmalloc include/linux/slab.h:716 [inline] kvzalloc include/linux/slab.h:724 [inline] bucket_table_alloc lib/rhashtable.c:184 [inline] rhashtable_init+0x54b/0xa60 lib/rhashtable.c:1061 ioam6_net_init+0xa9/0x160 net/ipv6/ioam6.c:910 ops_init+0x1c8/0x4a0 net/core/net_namespace.c:138 setup_net+0x4ab/0xcb0 net/core/net_namespace.c:335 copy_net_ns+0x355/0x5c0 net/core/net_namespace.c:481 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1545 [inline] free_pcp_prepare mm/page_alloc.c:1619 [inline] free_unref_page_prepare+0x742/0x750 mm/page_alloc.c:3581 free_unref_page+0x8f/0x530 mm/page_alloc.c:3677 free_the_page mm/page_alloc.c:830 [inline] free_compound_page+0x99/0xd0 mm/page_alloc.c:853 destroy_large_folio+0x68/0xa0 mm/page_alloc.c:890 __folio_put_large mm/swap.c:110 [inline] __folio_put+0xd1/0xe0 mm/swap.c:118 folio_put include/linux/mm.h:1431 [inline] put_page include/linux/mm.h:1483 [inline] __skb_frag_unref include/linux/skbuff.h:3455 [inline] skb_release_data+0x47f/0x890 net/core/skbuff.c:785 skb_release_all net/core/skbuff.c:856 [inline] napi_consume_skb+0x13d/0x2c0 net/core/skbuff.c:1113 skb_defer_free_flush net/core/dev.c:6745 [inline] net_rx_action+0x393/0xaa0 net/core/dev.c:6766 handle_softirqs+0x1d7/0x600 kernel/softirq.c:624 __do_softirq kernel/softirq.c:662 [inline] invoke_softirq kernel/softirq.c:479 [inline] __irq_exit_rcu+0x52/0xf0 kernel/softirq.c:711 irq_exit_rcu+0x9/0x10 kernel/softirq.c:723 common_interrupt+0xbe/0xe0 arch/x86/kernel/irq.c:242 asm_common_interrupt+0x27/0x40 arch/x86/include/asm/idtentry.h:682 Memory state around the buggy address: ffff888120710700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888120710780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888120710800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff888120710880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888120710900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================