EXT4-fs (loop4): 1 truncate cleaned up EXT4-fs (loop4): 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 ffff888110895050 by task syz.4.1005/3114 CPU: 1 PID: 3114 Comm: syz.4.1005 Not tainted 6.1.118-syzkaller-00063-g367540fdf981 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0x158/0x4e0 mm/kasan/report.c:427 kasan_report+0x13c/0x170 mm/kasan/report.c:531 kasan_check_range+0x294/0x2a0 mm/kasan/generic.c:189 memmove+0x2d/0x70 mm/kasan/shadow.c:54 ext4_xattr_set_entry+0x909/0x1fa0 fs/ext4/xattr.c:1732 ext4_xattr_block_set+0x99c/0x37f0 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+0x31a/0x420 fs/ext4/inode.c:5938 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5981 [inline] __ext4_mark_inode_dirty+0x4bb/0x7d0 fs/ext4/inode.c:6059 __ext4_unlink+0x6ed/0xba0 fs/ext4/namei.c:3341 ext4_unlink+0x142/0x3f0 fs/ext4/namei.c:3370 vfs_unlink+0x38c/0x630 fs/namei.c:4321 do_unlinkat+0x483/0x920 fs/namei.c:4389 __do_sys_unlink fs/namei.c:4437 [inline] __se_sys_unlink fs/namei.c:4435 [inline] __x64_sys_unlink+0x49/0x50 fs/namei.c:4435 x64_sys_call+0x289/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:88 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: 0033:0x7f60b3185d19 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:00007f60b3f87038 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 00007f60b3375fa0 RCX: 00007f60b3185d19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180 RBP: 00007f60b3201a20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f60b3375fa0 R15: 00007ffcde720e28 Allocated by task 3114: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505 ____kasan_kmalloc mm/kasan/common.c:379 [inline] __kasan_kmalloc+0x9c/0xb0 mm/kasan/common.c:388 kasan_kmalloc include/linux/kasan.h:212 [inline] __do_kmalloc_node mm/slab_common.c:938 [inline] __kmalloc_node_track_caller+0xb3/0x1e0 mm/slab_common.c:958 kmemdup+0x29/0x60 mm/util.c:134 _Z7kmemdupPKvU17pass_object_size0mj include/linux/fortify-string.h:585 [inline] ext4_xattr_block_set+0x80f/0x37f0 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+0x31a/0x420 fs/ext4/inode.c:5938 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5981 [inline] __ext4_mark_inode_dirty+0x4bb/0x7d0 fs/ext4/inode.c:6059 __ext4_unlink+0x6ed/0xba0 fs/ext4/namei.c:3341 ext4_unlink+0x142/0x3f0 fs/ext4/namei.c:3370 vfs_unlink+0x38c/0x630 fs/namei.c:4321 do_unlinkat+0x483/0x920 fs/namei.c:4389 __do_sys_unlink fs/namei.c:4437 [inline] __se_sys_unlink fs/namei.c:4435 [inline] __x64_sys_unlink+0x49/0x50 fs/namei.c:4435 x64_sys_call+0x289/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:88 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+0xb4/0xc0 mm/kasan/generic.c:486 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496 __call_rcu_common kernel/rcu/tree.c:2807 [inline] call_rcu+0xdc/0x10f0 kernel/rcu/tree.c:2926 __qdisc_destroy+0x175/0x2a0 net/sched/sch_generic.c:1080 qdisc_put net/sched/sch_generic.c:1100 [inline] shutdown_scheduler_queue net/sched/sch_generic.c:1153 [inline] netdev_for_each_tx_queue include/linux/netdevice.h:2503 [inline] dev_shutdown+0x192/0x560 net/sched/sch_generic.c:1485 unregister_netdevice_many+0xa17/0x1730 net/core/dev.c:10897 unregister_netdevice_queue+0x2e6/0x350 net/core/dev.c:10837 unregister_netdevice include/linux/netdevice.h:3100 [inline] __tun_detach+0xd14/0x1510 drivers/net/tun.c:685 tun_detach drivers/net/tun.c:701 [inline] tun_chr_close+0x92/0x140 drivers/net/tun.c:3492 __fput+0x1e5/0x870 fs/file_table.c:320 ____fput+0x15/0x20 fs/file_table.c:348 task_work_run+0x24d/0x2e0 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x94/0xa0 kernel/entry/common.c:177 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x26/0x130 kernel/entry/common.c:303 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff888110895000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 80 bytes inside of 1024-byte region [ffff888110895000, ffff888110895400) The buggy address belongs to the physical page: page:ffffea0004422400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x110890 head:ffffea0004422400 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043080 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 294, tgid 294 (syz-executor), ts 20804707852, free_ts 20753633655 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x213/0x220 mm/page_alloc.c:2590 prep_new_page+0x1b/0x110 mm/page_alloc.c:2597 get_page_from_freelist+0x2f41/0x2fc0 mm/page_alloc.c:4462 __alloc_pages+0x234/0x610 mm/page_alloc.c:5759 alloc_slab_page+0x6c/0xf0 allocate_slab mm/slub.c:1962 [inline] new_slab+0x90/0x3e0 mm/slub.c:2015 ___slab_alloc+0x6f9/0xb80 mm/slub.c:3203 __slab_alloc+0x5d/0xa0 mm/slub.c:3302 slab_alloc_node mm/slub.c:3387 [inline] __kmem_cache_alloc_node+0x207/0x2a0 mm/slub.c:3462 __do_kmalloc_node mm/slab_common.c:937 [inline] __kmalloc_node_track_caller+0xa2/0x1e0 mm/slab_common.c:958 kmalloc_reserve net/core/skbuff.c:446 [inline] __alloc_skb+0x125/0x2d0 net/core/skbuff.c:515 alloc_skb include/linux/skbuff.h:1290 [inline] alloc_uevent_skb+0x80/0x230 lib/kobject_uevent.c:290 uevent_net_broadcast_tagged lib/kobject_uevent.c:351 [inline] kobject_uevent_net_broadcast+0x188/0x590 lib/kobject_uevent.c:412 kobject_uevent_env+0x53c/0x720 lib/kobject_uevent.c:608 kobject_uevent+0x1f/0x30 lib/kobject_uevent.c:657 rx_queue_add_kobject net/core/net-sysfs.c:1068 [inline] net_rx_queue_update_kobjects+0x239/0x4a0 net/core/net-sysfs.c:1108 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1498 [inline] free_pcp_prepare mm/page_alloc.c:1572 [inline] free_unref_page_prepare+0x83d/0x850 mm/page_alloc.c:3511 free_unref_page+0xb2/0x5c0 mm/page_alloc.c:3607 free_the_page mm/page_alloc.c:798 [inline] __free_pages+0x61/0xf0 mm/page_alloc.c:5848 __free_slab+0xce/0x1a0 mm/slub.c:2039 free_slab mm/slub.c:2054 [inline] discard_slab mm/slub.c:2060 [inline] __unfreeze_partials+0x165/0x1a0 mm/slub.c:2609 put_cpu_partial+0xa9/0x100 mm/slub.c:2685 __slab_free+0x1c8/0x280 mm/slub.c:3563 do_slab_free mm/slub.c:3640 [inline] ___cache_free+0xc6/0xd0 mm/slub.c:3696 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0xc5/0x140 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x15a/0x180 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x24/0x80 mm/kasan/common.c:310 kasan_slab_alloc include/linux/kasan.h:202 [inline] slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:768 slab_alloc_node mm/slub.c:3421 [inline] slab_alloc mm/slub.c:3431 [inline] __kmem_cache_alloc_lru mm/slub.c:3438 [inline] kmem_cache_alloc+0x175/0x320 mm/slub.c:3447 sk_prot_alloc+0x5f/0x330 net/core/sock.c:2043 sk_alloc+0x38/0x440 net/core/sock.c:2106 unix_create1+0xb8/0x870 Memory state around the buggy address: ffff888110894f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888110894f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888110895000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff888110895080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888110895100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================