EXT4-fs (loop4): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x94b/0x1e90 fs/ext4/xattr.c:1795 Read of size 18446744073709551588 at addr ffff8880572cb040 by task syz.4.3771/20509 CPU: 0 PID: 20509 Comm: syz.4.3771 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xac/0x220 mm/kasan/report.c:468 kasan_report+0x117/0x150 mm/kasan/report.c:581 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x288/0x290 mm/kasan/generic.c:187 __asan_memmove+0x29/0x70 mm/kasan/shadow.c:94 ext4_xattr_set_entry+0x94b/0x1e90 fs/ext4/xattr.c:1795 ext4_xattr_block_set+0xae3/0x32a0 fs/ext4/xattr.c:2042 ext4_xattr_set_handle+0xbff/0x1290 fs/ext4/xattr.c:2467 ext4_xattr_set+0x22d/0x320 fs/ext4/xattr.c:2569 __vfs_setxattr+0x431/0x470 fs/xattr.c:201 __vfs_setxattr_noperm+0x12d/0x5e0 fs/xattr.c:235 vfs_setxattr+0x16c/0x2f0 fs/xattr.c:322 do_setxattr fs/xattr.c:630 [inline] path_setxattr+0x362/0x550 fs/xattr.c:659 __do_sys_setxattr fs/xattr.c:677 [inline] __se_sys_setxattr fs/xattr.c:673 [inline] __x64_sys_setxattr+0xbb/0xd0 fs/xattr.c:673 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f8c6d18f749 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:00007f8c6df68038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc RAX: ffffffffffffffda RBX: 00007f8c6d3e5fa0 RCX: 00007f8c6d18f749 RDX: 00002000000013c0 RSI: 0000200000000140 RDI: 0000200000000100 RBP: 00007f8c6d213f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000700 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f8c6d3e6038 R14: 00007f8c6d3e5fa0 R15: 00007ffd29767368 Allocated by task 20509: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4e/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:198 [inline] __do_kmalloc_node mm/slab_common.c:1007 [inline] __kmalloc_node_track_caller+0xb2/0x230 mm/slab_common.c:1027 kmemdup+0x2b/0x70 mm/util.c:131 kmemdup include/linux/fortify-string.h:779 [inline] ext4_xattr_block_set+0x9e5/0x32a0 fs/ext4/xattr.c:1990 ext4_xattr_set_handle+0xbff/0x1290 fs/ext4/xattr.c:2467 ext4_xattr_set+0x22d/0x320 fs/ext4/xattr.c:2569 __vfs_setxattr+0x431/0x470 fs/xattr.c:201 __vfs_setxattr_noperm+0x12d/0x5e0 fs/xattr.c:235 vfs_setxattr+0x16c/0x2f0 fs/xattr.c:322 do_setxattr fs/xattr.c:630 [inline] path_setxattr+0x362/0x550 fs/xattr.c:659 __do_sys_setxattr fs/xattr.c:677 [inline] __se_sys_setxattr fs/xattr.c:673 [inline] __x64_sys_setxattr+0xbb/0xd0 fs/xattr.c:673 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Last potentially related work creation: kasan_save_stack+0x3e/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:492 kvfree_call_rcu+0xee/0x780 kernel/rcu/tree.c:3452 neigh_periodic_work+0x3f7/0xd70 net/core/neighbour.c:1010 process_one_work kernel/workqueue.c:2634 [inline] process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 Second to last potentially related work creation: kasan_save_stack+0x3e/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:492 kvfree_call_rcu+0xee/0x780 kernel/rcu/tree.c:3452 cgroup_migrate_finish+0x1a3/0x370 kernel/cgroup/cgroup.c:2692 cgroup_attach_task+0x5cd/0x830 kernel/cgroup/cgroup.c:2891 cgroup_attach_task_all+0x9a/0xe0 kernel/cgroup/cgroup-v1.c:70 kvm_vm_worker_thread+0x38e/0x570 virt/kvm/kvm_main.c:6234 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 The buggy address belongs to the object at ffff8880572cb000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 64 bytes inside of 1024-byte region [ffff8880572cb000, ffff8880572cb400) The buggy address belongs to the physical page: page:ffffea00015cb200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x572c8 head:ffffea00015cb200 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000840 ffff888017841dc0 0000000000000000 dead000000000001 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 0x152820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL), pid 1077, tgid 1077 (kworker/u4:6), ts 94167328990, free_ts 94146792428 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1cd/0x210 mm/page_alloc.c:1554 prep_new_page mm/page_alloc.c:1561 [inline] get_page_from_freelist+0x195c/0x19f0 mm/page_alloc.c:3191 __alloc_pages+0x1e3/0x460 mm/page_alloc.c:4457 alloc_slab_page+0x5d/0x170 mm/slub.c:1881 allocate_slab mm/slub.c:2028 [inline] new_slab+0x87/0x2e0 mm/slub.c:2081 ___slab_alloc+0xc6d/0x1300 mm/slub.c:3253 __slab_alloc mm/slub.c:3339 [inline] __slab_alloc_node mm/slub.c:3392 [inline] slab_alloc_node mm/slub.c:3485 [inline] __kmem_cache_alloc_node+0x1a2/0x260 mm/slub.c:3534 __do_kmalloc_node mm/slab_common.c:1006 [inline] __kmalloc+0xa4/0x240 mm/slab_common.c:1020 kmalloc include/linux/slab.h:604 [inline] kzalloc include/linux/slab.h:721 [inline] ieee802_11_parse_elems_full+0xb9/0x2080 net/mac80211/util.c:1616 ieee802_11_parse_elems_crc net/mac80211/ieee80211_i.h:2337 [inline] ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2344 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1609 [inline] ieee80211_ibss_rx_queued_mgmt+0x49b/0x2ac0 net/mac80211/ibss.c:1642 ieee80211_iface_process_skb net/mac80211/iface.c:1651 [inline] ieee80211_iface_work+0x717/0xc70 net/mac80211/iface.c:1705 cfg80211_wiphy_work+0x225/0x260 net/wireless/core.c:437 process_one_work kernel/workqueue.c:2634 [inline] process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1154 [inline] free_unref_page_prepare+0x7ce/0x8e0 mm/page_alloc.c:2336 free_unref_page+0x32/0x2e0 mm/page_alloc.c:2429 napi_frag_unref include/linux/skbuff.h:3507 [inline] skb_release_data+0x49a/0x800 net/core/skbuff.c:985 skb_release_all net/core/skbuff.c:1057 [inline] __kfree_skb+0x57/0x70 net/core/skbuff.c:1071 tcp_clean_rtx_queue net/ipv4/tcp_input.c:3444 [inline] tcp_ack+0x1fb6/0x65e0 net/ipv4/tcp_input.c:4004 tcp_rcv_established+0x7f7/0x1cf0 net/ipv4/tcp_input.c:6160 tcp_v4_do_rcv+0x4ed/0xb80 net/ipv4/tcp_ipv4.c:1734 tcp_v4_rcv+0x2334/0x2a50 net/ipv4/tcp_ipv4.c:2166 ip_protocol_deliver_rcu+0x20e/0x3f0 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x2ca/0x510 net/ipv4/ip_input.c:233 NF_HOOK+0x303/0x390 include/linux/netfilter.h:304 dst_input include/net/dst.h:477 [inline] ip_sublist_rcv_finish net/ipv4/ip_input.c:580 [inline] ip_list_rcv_finish net/ipv4/ip_input.c:631 [inline] ip_sublist_rcv+0xa38/0xd20 net/ipv4/ip_input.c:639 ip_list_rcv+0x3e3/0x430 net/ipv4/ip_input.c:674 __netif_receive_skb_list_ptype net/core/dev.c:5651 [inline] __netif_receive_skb_list_core+0x578/0x740 net/core/dev.c:5699 __netif_receive_skb_list net/core/dev.c:5751 [inline] netif_receive_skb_list_internal+0x91b/0xc60 net/core/dev.c:5842 gro_normal_list include/net/gro.h:451 [inline] napi_complete_done+0x32a/0x810 net/core/dev.c:6182 Memory state around the buggy address: ffff8880572caf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880572caf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880572cb000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff8880572cb080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880572cb100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================