================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x8ca/0x1f30 fs/ext4/xattr.c:1732 Read of size 18446744073709551572 at addr ffff8880270c5050 by task syz.1.164/4909 CPU: 1 PID: 4909 Comm: syz.1.164 Not tainted 6.1.113-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 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:2616 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2691 [inline] ext4_expand_extra_isize_ea+0x10d5/0x1bb0 fs/ext4/xattr.c:2783 __ext4_expand_extra_isize+0x2f7/0x3d0 fs/ext4/inode.c:5936 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5979 [inline] __ext4_mark_inode_dirty+0x54f/0x920 fs/ext4/inode.c:6057 __ext4_unlink+0x6ed/0xba0 fs/ext4/namei.c:3341 ext4_unlink+0x1d5/0x670 fs/ext4/namei.c:3370 vfs_unlink+0x359/0x5f0 fs/namei.c:4322 do_unlinkat+0x4a5/0x820 fs/namei.c:4390 __do_sys_unlink fs/namei.c:4438 [inline] __se_sys_unlink fs/namei.c:4436 [inline] __x64_sys_unlink+0x45/0x50 fs/namei.c:4436 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: 0033:0x7f1409d7dff9 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:00007f140ab16038 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 00007f1409f36130 RCX: 00007f1409d7dff9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180 RBP: 00007f1409df0296 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f1409f36130 R15: 00007ffe24eb42d8 Allocated by task 4909: 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:2616 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2691 [inline] ext4_expand_extra_isize_ea+0x10d5/0x1bb0 fs/ext4/xattr.c:2783 __ext4_expand_extra_isize+0x2f7/0x3d0 fs/ext4/inode.c:5936 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5979 [inline] __ext4_mark_inode_dirty+0x54f/0x920 fs/ext4/inode.c:6057 __ext4_unlink+0x6ed/0xba0 fs/ext4/namei.c:3341 ext4_unlink+0x1d5/0x670 fs/ext4/namei.c:3370 vfs_unlink+0x359/0x5f0 fs/namei.c:4322 do_unlinkat+0x4a5/0x820 fs/namei.c:4390 __do_sys_unlink fs/namei.c:4438 [inline] __se_sys_unlink fs/namei.c:4436 [inline] __x64_sys_unlink+0x45/0x50 fs/namei.c:4436 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 Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:486 kvfree_call_rcu+0x116/0x8c0 kernel/rcu/tree.c:3401 neigh_del net/core/neighbour.c:225 [inline] neigh_remove_one+0x5c6/0x6d0 net/core/neighbour.c:246 neigh_forced_gc net/core/neighbour.c:279 [inline] neigh_alloc net/core/neighbour.c:485 [inline] ___neigh_create+0x459/0x24b0 net/core/neighbour.c:648 ip6_finish_output2+0x15ae/0x15f0 net/ipv6/ip6_output.c:129 __ip6_finish_output net/ipv6/ip6_output.c:205 [inline] ip6_finish_output+0x6a0/0xa80 net/ipv6/ip6_output.c:216 dst_output include/net/dst.h:444 [inline] NF_HOOK include/linux/netfilter.h:302 [inline] ndisc_send_skb+0xbab/0x14e0 net/ipv6/ndisc.c:511 addrconf_rs_timer+0x357/0x610 net/ipv6/addrconf.c:3963 call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1504 expire_timers kernel/time/timer.c:1549 [inline] __run_timers+0x67c/0x890 kernel/time/timer.c:1820 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:571 __do_softirq kernel/softirq.c:605 [inline] invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x157/0x240 kernel/softirq.c:654 irq_exit_rcu+0x5/0x20 kernel/softirq.c:666 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1106 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 The buggy address belongs to the object at ffff8880270c5000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 80 bytes inside of 1024-byte region [ffff8880270c5000, ffff8880270c5400) The buggy address belongs to the physical page: page:ffffea00009c3000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x270c0 head:ffffea00009c3000 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000001 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3643, tgid 3643 (syz-executor), ts 66274466471, free_ts 66151178596 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 include/linux/skbuff.h:1271 [inline] nlmsg_new include/net/netlink.h:991 [inline] rtmsg_fib+0x140/0x620 net/ipv4/fib_semantics.c:522 fib_table_insert+0xfb6/0x1f20 net/ipv4/fib_trie.c:1404 fib_magic net/ipv4/fib_frontend.c:1104 [inline] fib_add_ifaddr+0xf4c/0x1730 net/ipv4/fib_frontend.c:1148 fib_netdev_event+0x620/0x730 net/ipv4/fib_frontend.c:1486 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:455 __dev_notify_flags+0x304/0x610 dev_change_flags+0xe7/0x190 net/core/dev.c:8665 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 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+0x137/0x260 mm/slub.c:3437 kmalloc_trace+0x26/0xe0 mm/slab_common.c:1026 kmalloc include/linux/slab.h:557 [inline] netdevice_queue_work drivers/infiniband/core/roce_gid_mgmt.c:643 [inline] netdevice_event+0x3eb/0xa00 drivers/infiniband/core/roce_gid_mgmt.c:802 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:455 call_netdevice_notifiers_info net/core/dev.c:1970 [inline] call_netdevice_notifiers_extack net/core/dev.c:2008 [inline] call_netdevice_notifiers net/core/dev.c:2022 [inline] dev_set_mac_address+0x325/0x470 net/core/dev.c:8849 dev_set_mac_address_user+0x2d/0x50 net/core/dev.c:8863 do_setlink+0x7db/0x3de0 net/core/rtnetlink.c:2785 __rtnl_newlink net/core/rtnetlink.c:3605 [inline] rtnl_newlink+0x172c/0x2050 net/core/rtnetlink.c:3652 rtnetlink_rcv_msg+0x818/0xff0 net/core/rtnetlink.c:6150 netlink_rcv_skb+0x1cd/0x410 net/netlink/af_netlink.c:2508 Memory state around the buggy address: ffff8880270c4f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880270c4f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880270c5000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff8880270c5080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880270c5100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================