EXT4-fs (loop8): 1 truncate cleaned up EXT4-fs (loop8): mounted filesystem without journal. Quota mode: writeback. ================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x909/0x1fa0 fs/ext4/xattr.c:1732 Read of size 18446744073709551572 at addr ffff888072df0850 by task syz.8.4810/21046 CPU: 0 PID: 21046 Comm: syz.8.4810 Not tainted 6.1.131-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 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:316 [inline] print_report+0x15f/0x4f0 mm/kasan/report.c:427 kasan_report+0x136/0x160 mm/kasan/report.c:531 kasan_check_range+0x27f/0x290 mm/kasan/generic.c:189 memmove+0x25/0x60 mm/kasan/shadow.c:54 ext4_xattr_set_entry+0x909/0x1fa0 fs/ext4/xattr.c:1732 ext4_xattr_block_set+0x97e/0x3820 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+0x10eb/0x1c40 fs/ext4/xattr.c:2783 __ext4_expand_extra_isize+0x302/0x400 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_dirty_inode+0xbf/0x100 fs/ext4/inode.c:6089 __mark_inode_dirty+0x331/0xf80 fs/fs-writeback.c:2433 mark_inode_dirty include/linux/fs.h:2546 [inline] ext4_setattr+0x755/0x1a00 fs/ext4/inode.c:5613 notify_change+0xce3/0xfc0 fs/attr.c:499 vfs_utimes+0x4b1/0x760 fs/utimes.c:65 do_utimes_path fs/utimes.c:98 [inline] do_utimes fs/utimes.c:144 [inline] __do_sys_utime fs/utimes.c:225 [inline] __se_sys_utime+0x1dd/0x2d0 fs/utimes.c:214 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: 0033:0x7f204dd8d169 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:00007f204eb6c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000084 RAX: ffffffffffffffda RBX: 00007f204dfa5fa0 RCX: 00007f204dd8d169 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000400000006a80 RBP: 00007f204de0e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f204dfa5fa0 R15: 00007fff10e0c828 Allocated by task 21046: 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 _Z7kmemdupPKvU17pass_object_size0mj include/linux/fortify-string.h:585 [inline] ext4_xattr_block_set+0x7f4/0x3820 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+0x10eb/0x1c40 fs/ext4/xattr.c:2783 __ext4_expand_extra_isize+0x302/0x400 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_dirty_inode+0xbf/0x100 fs/ext4/inode.c:6089 __mark_inode_dirty+0x331/0xf80 fs/fs-writeback.c:2433 mark_inode_dirty include/linux/fs.h:2546 [inline] ext4_setattr+0x755/0x1a00 fs/ext4/inode.c:5613 notify_change+0xce3/0xfc0 fs/attr.c:499 vfs_utimes+0x4b1/0x760 fs/utimes.c:65 do_utimes_path fs/utimes.c:98 [inline] do_utimes fs/utimes.c:144 [inline] __do_sys_utime fs/utimes.c:225 [inline] __se_sys_utime+0x1dd/0x2d0 fs/utimes.c:214 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 call_rcu+0x163/0xa10 kernel/rcu/tree.c:2845 netdev_for_each_tx_queue include/linux/netdevice.h:2465 [inline] dev_shutdown+0x9d/0x440 net/sched/sch_generic.c:1489 unregister_netdevice_many+0xac3/0x1710 net/core/dev.c:10969 default_device_exit_batch+0x98d/0xa20 net/core/dev.c:11491 ops_exit_list net/core/net_namespace.c:177 [inline] cleanup_net+0x886/0xd20 net/core/net_namespace.c:640 process_one_work+0x917/0x1260 kernel/workqueue.c:2292 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Second to 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 cgroup_migrate_finish+0x1b7/0x380 kernel/cgroup/cgroup.c:2731 cgroup_attach_task+0x61e/0x970 kernel/cgroup/cgroup.c:2932 cgroup_attach_task_all+0x9a/0xe0 kernel/cgroup/cgroup-v1.c:70 kvm_vm_worker_thread+0x38f/0x540 virt/kvm/kvm_main.c:6127 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 The buggy address belongs to the object at ffff888072df0800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 80 bytes inside of 1024-byte region [ffff888072df0800, ffff888072df0c00) The buggy address belongs to the physical page: page:ffffea0001cb7c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x72df0 head:ffffea0001cb7c00 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 0x52a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 14, tgid 14 (kworker/0:1), ts 75923492004, free_ts 75294482626 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2532 prep_new_page mm/page_alloc.c:2539 [inline] get_page_from_freelist+0x3731/0x38d0 mm/page_alloc.c:4328 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5606 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+0xa1/0x230 mm/slab_common.c:949 kmalloc include/linux/slab.h:568 [inline] kzalloc include/linux/slab.h:699 [inline] neigh_alloc net/core/neighbour.c:494 [inline] ___neigh_create+0x6b7/0x24b0 net/core/neighbour.c:648 ip6_finish_output2+0x16ba/0x1700 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:453 [inline] NF_HOOK include/linux/netfilter.h:302 [inline] ndisc_send_skb+0xbf6/0x15f0 net/ipv6/ndisc.c:513 ndisc_send_ns+0xc8/0x150 net/ipv6/ndisc.c:671 addrconf_dad_work+0xb41/0x16e0 net/ipv6/addrconf.c:4222 process_one_work+0x917/0x1260 kernel/workqueue.c:2292 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1459 [inline] free_pcp_prepare mm/page_alloc.c:1509 [inline] free_unref_page_prepare+0x12a6/0x15b0 mm/page_alloc.c:3384 free_unref_page+0x33/0x3e0 mm/page_alloc.c:3479 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 __do_kmalloc_node mm/slab_common.c:935 [inline] __kmalloc_node+0xa2/0x230 mm/slab_common.c:943 kmalloc_node include/linux/slab.h:589 [inline] kvmalloc_node+0x6e/0x180 mm/util.c:581 kvmalloc include/linux/slab.h:716 [inline] seq_buf_alloc fs/seq_file.c:38 [inline] seq_read_iter+0x1fe/0xd10 fs/seq_file.c:210 proc_reg_read_iter+0x1b7/0x280 fs/proc/inode.c:305 call_read_iter include/linux/fs.h:2259 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x88d/0xbf0 fs/read_write.c:470 ksys_read+0x19c/0x2c0 fs/read_write.c:613 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 Memory state around the buggy address: ffff888072df0700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888072df0780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888072df0800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff888072df0880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888072df0900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================