================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x8ce/0x1f60 fs/ext4/xattr.c:1781 Read of size 18446744073709551572 at addr ffff88803463f050 by task syz.3.944/8465 CPU: 1 UID: 0 PID: 8465 Comm: syz.3.944 Not tainted 6.11.0-syzkaller-04003-gfc1dc0d50780 #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+0x241/0x360 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 __asan_memmove+0x29/0x70 mm/kasan/shadow.c:94 ext4_xattr_set_entry+0x8ce/0x1f60 fs/ext4/xattr.c:1781 ext4_xattr_block_set+0xa39/0x3980 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+0x12d7/0x1cf0 fs/ext4/xattr.c:2836 __ext4_expand_extra_isize+0x2fb/0x3e0 fs/ext4/inode.c:5858 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5901 [inline] __ext4_mark_inode_dirty+0x524/0x880 fs/ext4/inode.c:5979 __ext4_unlink+0x6c2/0xb50 fs/ext4/namei.c:3289 ext4_unlink+0x1bf/0x5a0 fs/ext4/namei.c:3318 vfs_unlink+0x367/0x650 fs/namei.c:4469 do_unlinkat+0x4ae/0x830 fs/namei.c:4533 __do_sys_unlink fs/namei.c:4581 [inline] __se_sys_unlink fs/namei.c:4579 [inline] __x64_sys_unlink+0x47/0x50 fs/namei.c:4579 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f413037def9 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:00007f41311ec038 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 00007f4130536130 RCX: 00007f413037def9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180 RBP: 00007f41303f0b76 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f4130536130 R15: 00007ffefa6c5428 Allocated by task 8465: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0x98/0xb0 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+0x225/0x440 mm/slub.c:4178 kmemdup_noprof+0x2a/0x60 mm/util.c:133 ext4_xattr_block_set+0x88b/0x3980 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+0x12d7/0x1cf0 fs/ext4/xattr.c:2836 __ext4_expand_extra_isize+0x2fb/0x3e0 fs/ext4/inode.c:5858 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5901 [inline] __ext4_mark_inode_dirty+0x524/0x880 fs/ext4/inode.c:5979 __ext4_unlink+0x6c2/0xb50 fs/ext4/namei.c:3289 ext4_unlink+0x1bf/0x5a0 fs/ext4/namei.c:3318 vfs_unlink+0x367/0x650 fs/namei.c:4469 do_unlinkat+0x4ae/0x830 fs/namei.c:4533 __do_sys_unlink fs/namei.c:4581 [inline] __se_sys_unlink fs/namei.c:4579 [inline] __x64_sys_unlink+0x47/0x50 fs/namei.c:4579 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88803463f000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 80 bytes inside of 1024-byte region [ffff88803463f000, ffff88803463f400) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x34638 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xfdffffff(slab) raw: 00fff00000000040 ffff88801ac41dc0 0000000000000000 dead000000000001 raw: 0000000000000000 0000000080100010 00000001fdffffff 0000000000000000 head: 00fff00000000040 ffff88801ac41dc0 0000000000000000 dead000000000001 head: 0000000000000000 0000000080100010 00000001fdffffff 0000000000000000 head: 00fff00000000003 ffffea0000d18e01 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 0x152820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL), pid 5441, tgid 5437 (syz.4.32), ts 81150659880, free_ts 81022272807 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1500 prep_new_page mm/page_alloc.c:1508 [inline] get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3446 __alloc_pages_noprof+0x256/0x6c0 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+0x5f/0x120 mm/slub.c:2319 allocate_slab+0x5a/0x2f0 mm/slub.c:2482 new_slab mm/slub.c:2535 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3721 __slab_alloc+0x58/0xa0 mm/slub.c:3811 __slab_alloc_node mm/slub.c:3864 [inline] slab_alloc_node mm/slub.c:4026 [inline] __do_kmalloc_node mm/slub.c:4158 [inline] __kmalloc_noprof+0x25a/0x400 mm/slub.c:4171 kmalloc_noprof include/linux/slab.h:694 [inline] kzalloc_noprof include/linux/slab.h:816 [inline] neigh_alloc net/core/neighbour.c:494 [inline] ___neigh_create+0x691/0x2470 net/core/neighbour.c:648 ip6_finish_output2+0x1700/0x1730 net/ipv6/ip6_output.c:132 ip6_finish_output+0x41e/0x810 net/ipv6/ip6_output.c:226 NF_HOOK include/linux/netfilter.h:314 [inline] ndisc_send_skb+0xab2/0x1380 net/ipv6/ndisc.c:511 addrconf_rs_timer+0x371/0x670 net/ipv6/addrconf.c:4042 call_timer_fn+0x190/0x650 kernel/time/timer.c:1794 expire_timers kernel/time/timer.c:1845 [inline] __run_timers kernel/time/timer.c:2419 [inline] __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2430 run_timer_base kernel/time/timer.c:2439 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2449 page last free pid 5249 tgid 5249 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1101 [inline] free_unref_page+0xd22/0xea0 mm/page_alloc.c:2619 discard_slab mm/slub.c:2581 [inline] __put_partials+0xeb/0x130 mm/slub.c:3049 put_cpu_partial+0x17c/0x250 mm/slub.c:3124 __slab_free+0x2ea/0x3d0 mm/slub.c:4344 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 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] kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4045 getname_flags+0xb7/0x540 fs/namei.c:139 vfs_fstatat+0x12c/0x190 fs/stat.c:340 __do_sys_newfstatat fs/stat.c:505 [inline] __se_sys_newfstatat fs/stat.c:499 [inline] __x64_sys_newfstatat+0x11d/0x1a0 fs/stat.c:499 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88803463ef00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88803463ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88803463f000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88803463f080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88803463f100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================