EXT4-fs (loop0): mounted filesystem without journal. Quota mode: writeback. ================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x979/0x21d0 fs/ext4/xattr.c:1732 Read of size 18446744073709551572 at addr ffff88810d488050 by task syz-executor310/290 CPU: 0 PID: 290 Comm: syz-executor310 Not tainted 6.1.134-syzkaller-00039-g3c6d0251e1fb #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:1732 ext4_xattr_block_set+0xada/0x3270 fs/ext4/xattr.c:1979 ext4_xattr_move_to_block fs/ext4/xattr.c:2616 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2691 [inline] ext4_expand_extra_isize_ea+0xf30/0x1990 fs/ext4/xattr.c:2783 __ext4_expand_extra_isize+0x2fe/0x3e0 fs/ext4/inode.c:5938 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5981 [inline] __ext4_mark_inode_dirty+0x3cf/0x600 fs/ext4/inode.c:6059 __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: 0033:0x7f8202b84a39 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffddf709088 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000200000000040 RCX: 00007f8202b84a39 RDX: 00007f8202b84a39 RSI: 00007f8202b84a39 RDI: 0000200000000180 RBP: 0031656c69662f2e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0032656c69662f2e R13: 00007ffddf709268 R14: 0000000000000001 R15: 0000000000000001 Allocated by task 290: 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:1927 ext4_xattr_move_to_block fs/ext4/xattr.c:2616 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2691 [inline] ext4_expand_extra_isize_ea+0xf30/0x1990 fs/ext4/xattr.c:2783 __ext4_expand_extra_isize+0x2fe/0x3e0 fs/ext4/inode.c:5938 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5981 [inline] __ext4_mark_inode_dirty+0x3cf/0x600 fs/ext4/inode.c:6059 __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 ffff88810d488000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 80 bytes inside of 1024-byte region [ffff88810d488000, ffff88810d488400) The buggy address belongs to the physical page: page:ffffea0004352200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10d488 head:ffffea0004352200 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 0000000000000000 dead000000000122 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 (sshd-session), ts 29448836398, free_ts 23755594625 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+0x2c6e/0x2ce0 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_track_caller+0xa0/0x1e0 mm/slab_common.c:958 kmalloc_reserve net/core/skbuff.c:446 [inline] __alloc_skb+0x224/0x7e0 net/core/skbuff.c:515 alloc_skb_fclone include/linux/skbuff.h:1340 [inline] tcp_stream_alloc_skb+0x47/0x360 net/ipv4/tcp.c:867 tcp_sendmsg_locked+0xd10/0x3d90 net/ipv4/tcp.c:1330 tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1488 inet_sendmsg+0xb6/0xd0 net/ipv4/af_inet.c:835 sock_sendmsg_nosec net/socket.c:716 [inline] __sock_sendmsg net/socket.c:728 [inline] sock_write_iter+0x2ca/0x3b0 net/socket.c:1133 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_pages+0x67/0x100 mm/page_alloc.c:5931 __free_slab+0xca/0x1a0 mm/slub.c:2039 free_slab mm/slub.c:2054 [inline] discard_slab mm/slub.c:2060 [inline] __unfreeze_partials+0x160/0x190 mm/slub.c:2609 put_cpu_partial+0xa9/0x100 mm/slub.c:2685 __slab_free+0x1c4/0x280 mm/slub.c:3563 do_slab_free mm/slub.c:3640 [inline] ___cache_free+0xbf/0xd0 mm/slub.c:3696 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0xc6/0x140 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x14a/0x170 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x24/0x80 mm/kasan/common.c:310 kasan_slab_alloc include/linux/kasan.h:202 [inline] slab_post_alloc_hook+0x4f/0x2d0 mm/slab.h:768 slab_alloc_node mm/slub.c:3421 [inline] kmem_cache_alloc_node+0x181/0x340 mm/slub.c:3468 __alloc_skb+0xdf/0x7e0 net/core/skbuff.c:505 alloc_skb_fclone include/linux/skbuff.h:1340 [inline] tcp_stream_alloc_skb+0x47/0x360 net/ipv4/tcp.c:867 tcp_sendmsg_locked+0xd10/0x3d90 net/ipv4/tcp.c:1330 Memory state around the buggy address: ffff88810d487f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88810d487f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88810d488000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88810d488080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88810d488100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================