================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x8ca/0x1f30 fs/ext4/xattr.c:1732 Read of size 18446744073709551572 at addr ffff88807cf21850 by task syz.4.90/4144 CPU: 0 PID: 4144 Comm: syz.4.90 Not tainted 6.1.111-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15f/0x4f0 mm/kasan/report.c:395 kasan_report+0x136/0x160 mm/kasan/report.c:495 kasan_check_range+0x27f/0x290 mm/kasan/generic.c:189 memmove+0x25/0x60 mm/kasan/shadow.c:54 ext4_xattr_set_entry+0x8ca/0x1f30 fs/ext4/xattr.c:1732 ext4_xattr_block_set+0xa58/0x3920 fs/ext4/xattr.c:1979 ext4_xattr_move_to_block fs/ext4/xattr.c:2615 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2690 [inline] ext4_expand_extra_isize_ea+0x10d5/0x1bb0 fs/ext4/xattr.c:2782 __ext4_expand_extra_isize+0x2f7/0x3d0 fs/ext4/inode.c:5933 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5976 [inline] __ext4_mark_inode_dirty+0x54f/0x920 fs/ext4/inode.c:6054 __ext4_unlink+0x6ed/0xba0 fs/ext4/namei.c:3339 ext4_unlink+0x1d5/0x670 fs/ext4/namei.c:3368 vfs_unlink+0x359/0x5f0 fs/namei.c:4324 do_unlinkat+0x4a5/0x820 fs/namei.c:4392 __do_sys_unlink fs/namei.c:4440 [inline] __se_sys_unlink fs/namei.c:4438 [inline] __x64_sys_unlink+0x45/0x50 fs/namei.c:4438 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f870a57def9 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:00007f870b402038 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 00007f870a736130 RCX: 00007f870a57def9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180 RBP: 00007f870a5f0b76 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f870a736130 R15: 00007fffd236c8c8 Allocated by task 4144: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:936 [inline] __kmalloc_node_track_caller+0xb1/0x220 mm/slab_common.c:956 kmemdup+0x26/0x60 mm/util.c:129 ext4_xattr_block_set+0x884/0x3920 fs/ext4/xattr.c:1927 ext4_xattr_move_to_block fs/ext4/xattr.c:2615 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2690 [inline] ext4_expand_extra_isize_ea+0x10d5/0x1bb0 fs/ext4/xattr.c:2782 __ext4_expand_extra_isize+0x2f7/0x3d0 fs/ext4/inode.c:5933 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5976 [inline] __ext4_mark_inode_dirty+0x54f/0x920 fs/ext4/inode.c:6054 __ext4_unlink+0x6ed/0xba0 fs/ext4/namei.c:3339 ext4_unlink+0x1d5/0x670 fs/ext4/namei.c:3368 vfs_unlink+0x359/0x5f0 fs/namei.c:4324 do_unlinkat+0x4a5/0x820 fs/namei.c:4392 __do_sys_unlink fs/namei.c:4440 [inline] __se_sys_unlink fs/namei.c:4438 [inline] __x64_sys_unlink+0x45/0x50 fs/namei.c:4438 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff88807cf21800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 80 bytes inside of 1024-byte region [ffff88807cf21800, ffff88807cf21c00) The buggy address belongs to the physical page: page:ffffea0001f3c800 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7cf20 head:ffffea0001f3c800 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888017c41dc0 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 0x1d2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 21, tgid 21 (ksoftirqd/1), ts 75994825101, free_ts 75973593318 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2517 prep_new_page mm/page_alloc.c:2524 [inline] get_page_from_freelist+0x322e/0x33b0 mm/page_alloc.c:4290 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5558 alloc_slab_page+0x6a/0x150 mm/slub.c:1794 allocate_slab mm/slub.c:1939 [inline] new_slab+0x84/0x2d0 mm/slub.c:1992 ___slab_alloc+0xc20/0x1270 mm/slub.c:3180 __slab_alloc mm/slub.c:3279 [inline] slab_alloc_node mm/slub.c:3364 [inline] __kmem_cache_alloc_node+0x19f/0x260 mm/slub.c:3437 __do_kmalloc_node mm/slab_common.c:935 [inline] __kmalloc_node_track_caller+0xa0/0x220 mm/slab_common.c:956 kmalloc_reserve net/core/skbuff.c:446 [inline] __alloc_skb+0x135/0x670 net/core/skbuff.c:515 alloc_skb_fclone include/linux/skbuff.h:1321 [inline] tcp_stream_alloc_skb+0x3e/0x310 net/ipv4/tcp.c:869 tso_fragment net/ipv4/tcp_output.c:2137 [inline] tcp_write_xmit+0x110d/0x64c0 net/ipv4/tcp_output.c:2695 __tcp_push_pending_frames+0x97/0x350 net/ipv4/tcp_output.c:2894 tcp_push_pending_frames include/net/tcp.h:1969 [inline] tcp_data_snd_check net/ipv4/tcp_input.c:5557 [inline] tcp_rcv_established+0xfc7/0x1f00 net/ipv4/tcp_input.c:5981 tcp_v4_do_rcv+0x487/0xb00 net/ipv4/tcp_ipv4.c:1680 tcp_v4_rcv+0x29e0/0x3250 net/ipv4/tcp_ipv4.c:2111 ip_protocol_deliver_rcu+0x381/0x740 net/ipv4/ip_input.c:205 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1444 [inline] free_pcp_prepare mm/page_alloc.c:1494 [inline] free_unref_page_prepare+0xf63/0x1120 mm/page_alloc.c:3369 free_unref_page+0x33/0x3e0 mm/page_alloc.c:3464 free_slab mm/slub.c:2031 [inline] discard_slab mm/slub.c:2037 [inline] __unfreeze_partials+0x1b7/0x210 mm/slub.c:2586 put_cpu_partial+0x17b/0x250 mm/slub.c:2662 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x156/0x170 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737 slab_alloc_node mm/slub.c:3398 [inline] kmem_cache_alloc_node+0x136/0x310 mm/slub.c:3443 __alloc_skb+0xde/0x670 net/core/skbuff.c:505 alloc_skb include/linux/skbuff.h:1271 [inline] alloc_skb_with_frags+0xa4/0x740 net/core/skbuff.c:6162 sock_alloc_send_pskb+0x915/0xa50 net/core/sock.c:2747 sock_alloc_send_skb include/net/sock.h:1918 [inline] mld_newpack+0x1c0/0xa90 net/ipv6/mcast.c:1748 add_grhead net/ipv6/mcast.c:1851 [inline] add_grec+0x1492/0x19a0 net/ipv6/mcast.c:1989 mld_send_initial_cr+0x20f/0x3a0 net/ipv6/mcast.c:2236 mld_dad_work+0x40/0x400 net/ipv6/mcast.c:2262 Memory state around the buggy address: ffff88807cf21700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807cf21780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88807cf21800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88807cf21880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88807cf21900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================