================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0xcb3/0x1f10 fs/ext4/xattr.c:1781 Read of size 18446744073709551572 at addr ffff8880289f4850 by task syz.1.429/7187 CPU: 1 UID: 0 PID: 7187 Comm: syz.1.429 Not tainted 6.11.0-syzkaller-02574-ga430d95c5efa #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189 __asan_memmove+0x23/0x60 mm/kasan/shadow.c:94 ext4_xattr_set_entry+0xcb3/0x1f10 fs/ext4/xattr.c:1781 ext4_xattr_block_set+0xea7/0x3170 fs/ext4/xattr.c:2028 ext4_xattr_move_to_block fs/ext4/xattr.c:2669 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2744 [inline] ext4_expand_extra_isize_ea+0x1484/0x1ae0 fs/ext4/xattr.c:2836 __ext4_expand_extra_isize+0x346/0x480 fs/ext4/inode.c:5858 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5901 [inline] __ext4_mark_inode_dirty+0x55a/0x890 fs/ext4/inode.c:5979 __ext4_unlink+0x630/0xcb0 fs/ext4/namei.c:3289 ext4_unlink+0x422/0x610 fs/ext4/namei.c:3318 vfs_unlink+0x2fe/0x9b0 fs/namei.c:4469 do_unlinkat+0x570/0x760 fs/namei.c:4533 __do_sys_unlink fs/namei.c:4581 [inline] __se_sys_unlink fs/namei.c:4579 [inline] __x64_sys_unlink+0xc5/0x110 fs/namei.c:4579 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4fb797def9 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:00007f4fb8717038 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 00007f4fb7b36130 RCX: 00007f4fb797def9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180 RBP: 00007f4fb79f0b76 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f4fb7b36130 R15: 00007ffce26f57d8 Allocated by task 7187: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:4159 [inline] __kmalloc_node_track_caller_noprof+0x20f/0x430 mm/slub.c:4178 kmemdup_noprof+0x29/0x60 mm/util.c:133 kmemdup_noprof include/linux/fortify-string.h:753 [inline] ext4_xattr_block_set+0x88d/0x3170 fs/ext4/xattr.c:1976 ext4_xattr_move_to_block fs/ext4/xattr.c:2669 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2744 [inline] ext4_expand_extra_isize_ea+0x1484/0x1ae0 fs/ext4/xattr.c:2836 __ext4_expand_extra_isize+0x346/0x480 fs/ext4/inode.c:5858 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5901 [inline] __ext4_mark_inode_dirty+0x55a/0x890 fs/ext4/inode.c:5979 __ext4_unlink+0x630/0xcb0 fs/ext4/namei.c:3289 ext4_unlink+0x422/0x610 fs/ext4/namei.c:3318 vfs_unlink+0x2fe/0x9b0 fs/namei.c:4469 do_unlinkat+0x570/0x760 fs/namei.c:4533 __do_sys_unlink fs/namei.c:4581 [inline] __se_sys_unlink fs/namei.c:4579 [inline] __x64_sys_unlink+0xc5/0x110 fs/namei.c:4579 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff8880289f4800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 80 bytes inside of 1024-byte region [ffff8880289f4800, ffff8880289f4c00) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x289f0 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xfdffffff(slab) raw: 00fff00000000040 ffff88801ac41dc0 ffffea0001727000 dead000000000002 raw: 0000000000000000 0000000080100010 00000001fdffffff 0000000000000000 head: 00fff00000000040 ffff88801ac41dc0 ffffea0001727000 dead000000000002 head: 0000000000000000 0000000080100010 00000001fdffffff 0000000000000000 head: 00fff00000000003 ffffea0000a27c01 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 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 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5229, tgid 5229 (syz-executor), ts 111010106281, free_ts 110994793161 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1500 prep_new_page mm/page_alloc.c:1508 [inline] get_page_from_freelist+0x1351/0x2e50 mm/page_alloc.c:3446 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4702 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x4e/0xf0 mm/slub.c:2319 allocate_slab mm/slub.c:2482 [inline] new_slab+0x84/0x260 mm/slub.c:2535 ___slab_alloc+0xdac/0x1870 mm/slub.c:3721 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3811 __slab_alloc_node mm/slub.c:3864 [inline] slab_alloc_node mm/slub.c:4026 [inline] __kmalloc_cache_noprof+0x2b4/0x300 mm/slub.c:4185 kmalloc_noprof include/linux/slab.h:690 [inline] kzalloc_noprof include/linux/slab.h:816 [inline] batadv_hardif_add_interface net/batman-adv/hard-interface.c:882 [inline] batadv_hard_if_event+0xb94/0x1640 net/batman-adv/hard-interface.c:970 notifier_call_chain+0xbc/0x410 kernel/notifier.c:93 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1996 call_netdevice_notifiers_extack net/core/dev.c:2034 [inline] call_netdevice_notifiers net/core/dev.c:2048 [inline] register_netdevice+0x17a0/0x1e90 net/core/dev.c:10520 team_newlink+0x92/0x160 drivers/net/team/team_core.c:2217 rtnl_newlink_create net/core/rtnetlink.c:3510 [inline] __rtnl_newlink+0x119a/0x1920 net/core/rtnetlink.c:3730 rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3743 rtnetlink_rcv_msg+0x3ca/0xea0 net/core/rtnetlink.c:6646 page last free pid 5229 tgid 5229 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1101 [inline] free_unref_page+0x64a/0xe40 mm/page_alloc.c:2619 __put_partials+0x14c/0x170 mm/slub.c:3049 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3989 [inline] slab_alloc_node mm/slub.c:4038 [inline] __kmalloc_cache_noprof+0x11e/0x300 mm/slub.c:4185 kmalloc_noprof include/linux/slab.h:690 [inline] kzalloc_noprof include/linux/slab.h:816 [inline] ref_tracker_alloc+0x17c/0x5b0 lib/ref_tracker.c:203 __netdev_tracker_alloc include/linux/netdevice.h:4050 [inline] netdev_hold include/linux/netdevice.h:4079 [inline] netdev_hold include/linux/netdevice.h:4074 [inline] rx_queue_add_kobject net/core/net-sysfs.c:1106 [inline] net_rx_queue_update_kobjects+0x284/0x5f0 net/core/net-sysfs.c:1164 register_queue_kobjects net/core/net-sysfs.c:1898 [inline] netdev_register_kobject+0x26d/0x3f0 net/core/net-sysfs.c:2143 register_netdevice+0x1473/0x1e90 net/core/dev.c:10487 team_newlink+0x92/0x160 drivers/net/team/team_core.c:2217 rtnl_newlink_create net/core/rtnetlink.c:3510 [inline] __rtnl_newlink+0x119a/0x1920 net/core/rtnetlink.c:3730 rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3743 rtnetlink_rcv_msg+0x3ca/0xea0 net/core/rtnetlink.c:6646 netlink_rcv_skb+0x16e/0x440 net/netlink/af_netlink.c:2550 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x53f/0x7f0 net/netlink/af_netlink.c:1357 Memory state around the buggy address: ffff8880289f4700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880289f4780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880289f4800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff8880289f4880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880289f4900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================