loop1: detected capacity change from 0 to 1024 EXT4-fs (loop1): mounted filesystem without journal. Quota mode: none. ================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x1a71/0x21d0 fs/ext4/xattr.c:1699 Read of size 18446744073709550592 at addr ffff8881106ebc00 by task syz.1.1275/5492 CPU: 0 PID: 5492 Comm: syz.1.1275 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: __dump_stack+0x21/0x24 lib/dump_stack.c:88 dump_stack_lvl+0xee/0x150 lib/dump_stack.c:106 print_address_description+0x71/0x200 mm/kasan/report.c:316 print_report+0x4a/0x60 mm/kasan/report.c:420 kasan_report+0x122/0x150 mm/kasan/report.c:524 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x280/0x290 mm/kasan/generic.c:189 memmove+0x2d/0x70 mm/kasan/shadow.c:54 ext4_xattr_set_entry+0x1a71/0x21d0 fs/ext4/xattr.c:1699 ext4_xattr_block_set+0xada/0x3270 fs/ext4/xattr.c:1989 ext4_xattr_set_handle+0xbd5/0x12b0 fs/ext4/xattr.c:2414 ext4_xattr_set+0x22a/0x320 fs/ext4/xattr.c:2516 ext4_xattr_trusted_set+0x3c/0x50 fs/ext4/xattr_trusted.c:38 __vfs_setxattr+0x3f2/0x440 fs/xattr.c:182 __vfs_setxattr_noperm+0x12a/0x5e0 fs/xattr.c:216 __vfs_setxattr_locked+0x212/0x230 fs/xattr.c:277 vfs_setxattr+0x168/0x2f0 fs/xattr.c:309 do_setxattr fs/xattr.c:594 [inline] setxattr+0x2b2/0x2d0 fs/xattr.c:617 path_setxattr+0x142/0x280 fs/xattr.c:636 __do_sys_lsetxattr fs/xattr.c:659 [inline] __se_sys_lsetxattr fs/xattr.c:655 [inline] __x64_sys_lsetxattr+0xc2/0xe0 fs/xattr.c:655 x64_sys_call+0x8b7/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:190 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f47d558f749 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:00007f47d63e9038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd RAX: ffffffffffffffda RBX: 00007f47d57e5fa0 RCX: 00007f47d558f749 RDX: 0000200000000300 RSI: 00002000000000c0 RDI: 0000200000000100 RBP: 00007f47d5613f91 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000fe37 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f47d57e6038 R14: 00007f47d57e5fa0 R15: 00007ffe34788748 Allocated by task 5492: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_alloc_info+0x25/0x30 mm/kasan/generic.c:505 ____kasan_kmalloc mm/kasan/common.c:379 [inline] __kasan_kmalloc+0x95/0xb0 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+0xb1/0x1e0 mm/slab_common.c:958 kmemdup+0x2b/0x60 mm/util.c:134 kmemdup include/linux/fortify-string.h:585 [inline] ext4_xattr_block_set+0x9dc/0x3270 fs/ext4/xattr.c:1937 ext4_xattr_set_handle+0xbd5/0x12b0 fs/ext4/xattr.c:2414 ext4_xattr_set+0x22a/0x320 fs/ext4/xattr.c:2516 ext4_xattr_trusted_set+0x3c/0x50 fs/ext4/xattr_trusted.c:38 __vfs_setxattr+0x3f2/0x440 fs/xattr.c:182 __vfs_setxattr_noperm+0x12a/0x5e0 fs/xattr.c:216 __vfs_setxattr_locked+0x212/0x230 fs/xattr.c:277 vfs_setxattr+0x168/0x2f0 fs/xattr.c:309 do_setxattr fs/xattr.c:594 [inline] setxattr+0x2b2/0x2d0 fs/xattr.c:617 path_setxattr+0x142/0x280 fs/xattr.c:636 __do_sys_lsetxattr fs/xattr.c:659 [inline] __se_sys_lsetxattr fs/xattr.c:655 [inline] __x64_sys_lsetxattr+0xc2/0xe0 fs/xattr.c:655 x64_sys_call+0x8b7/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:190 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Last potentially related work creation: kasan_save_stack+0x3a/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb6/0xc0 mm/kasan/generic.c:486 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496 kvfree_call_rcu+0x95/0x7a0 kernel/rcu/tree.c:3445 drop_sysctl_table+0x2ef/0x410 fs/proc/proc_sysctl.c:1731 unregister_sysctl_table+0x75/0x120 fs/proc/proc_sysctl.c:1769 unregister_net_sysctl_table+0x15/0x20 net/sysctl_net.c:175 neigh_sysctl_unregister+0x78/0x90 net/core/neighbour.c:3871 devinet_sysctl_unregister net/ipv4/devinet.c:2664 [inline] inetdev_destroy net/ipv4/devinet.c:329 [inline] inetdev_event+0x860/0x10e0 net/ipv4/devinet.c:1615 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xa1/0x110 kernel/notifier.c:455 call_netdevice_notifiers_info net/core/dev.c:2009 [inline] call_netdevice_notifiers_extack net/core/dev.c:2047 [inline] call_netdevice_notifiers net/core/dev.c:2061 [inline] unregister_netdevice_many+0xf8f/0x1820 net/core/dev.c:10967 ip_tunnel_delete_nets+0x346/0x390 net/ipv4/ip_tunnel.c:1139 ipip_exit_batch_net+0x22/0x30 net/ipv4/ipip.c:596 ops_exit_list net/core/net_namespace.c:177 [inline] cleanup_net+0x62d/0xb00 net/core/net_namespace.c:604 process_one_work+0x71f/0xc40 kernel/workqueue.c:2302 worker_thread+0xa29/0x11f0 kernel/workqueue.c:2449 kthread+0x281/0x320 kernel/kthread.c:386 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Second to last potentially related work creation: kasan_save_stack+0x3a/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb6/0xc0 mm/kasan/generic.c:486 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496 kvfree_call_rcu+0x95/0x7a0 kernel/rcu/tree.c:3445 drop_sysctl_table+0x2ef/0x410 fs/proc/proc_sysctl.c:1731 unregister_sysctl_table+0x75/0x120 fs/proc/proc_sysctl.c:1769 unregister_net_sysctl_table+0x15/0x20 net/sysctl_net.c:175 neigh_sysctl_unregister+0x78/0x90 net/core/neighbour.c:3871 addrconf_sysctl_unregister net/ipv6/addrconf.c:7249 [inline] addrconf_ifdown+0x1650/0x1910 net/ipv6/addrconf.c:3977 addrconf_notify+0x39f/0xe40 net/ipv6/addrconf.c:-1 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xa1/0x110 kernel/notifier.c:455 call_netdevice_notifiers_info net/core/dev.c:2009 [inline] call_netdevice_notifiers_extack net/core/dev.c:2047 [inline] call_netdevice_notifiers net/core/dev.c:2061 [inline] unregister_netdevice_many+0xf8f/0x1820 net/core/dev.c:10967 ip_tunnel_delete_nets+0x346/0x390 net/ipv4/ip_tunnel.c:1139 vti_exit_batch_net+0x22/0x30 net/ipv4/ip_vti.c:515 ops_exit_list net/core/net_namespace.c:177 [inline] cleanup_net+0x62d/0xb00 net/core/net_namespace.c:604 process_one_work+0x71f/0xc40 kernel/workqueue.c:2302 worker_thread+0xa29/0x11f0 kernel/workqueue.c:2449 kthread+0x281/0x320 kernel/kthread.c:386 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 The buggy address belongs to the object at ffff8881106eb800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 0 bytes to the right of 1024-byte region [ffff8881106eb800, ffff8881106ebc00) The buggy address belongs to the physical page: page:ffffea000441ba00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1106e8 head:ffffea000441ba00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 ffffea0004400000 dead000000000003 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 283, tgid 283 (syz-executor), ts 28969963492, free_ts 28963672726 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1f5/0x210 mm/page_alloc.c:2643 prep_new_page+0x1c/0x110 mm/page_alloc.c:2650 get_page_from_freelist+0x2c7b/0x2cf0 mm/page_alloc.c:4554 __alloc_pages+0x1c3/0x450 mm/page_alloc.c:5868 alloc_slab_page+0x6e/0xf0 include/linux/gfp.h:-1 allocate_slab mm/slub.c:1967 [inline] new_slab+0x98/0x3d0 mm/slub.c:2020 ___slab_alloc+0x6bd/0xb20 mm/slub.c:3177 __slab_alloc+0x5e/0xa0 mm/slub.c:3263 slab_alloc_node mm/slub.c:3348 [inline] __kmem_cache_alloc_node+0x203/0x2c0 mm/slub.c:3423 __do_kmalloc_node mm/slab_common.c:937 [inline] __kmalloc_node_track_caller+0xa0/0x1e0 mm/slab_common.c:958 kmalloc_reserve net/core/skbuff.c:449 [inline] __alloc_skb+0x236/0x4b0 net/core/skbuff.c:518 alloc_skb include/linux/skbuff.h:1290 [inline] nlmsg_new include/net/netlink.h:991 [inline] rtmsg_fib+0x60a/0xe20 net/ipv4/fib_semantics.c:522 fib_table_insert+0xf37/0x1d00 net/ipv4/fib_trie.c:1385 fib_magic net/ipv4/fib_frontend.c:1118 [inline] fib_add_ifaddr+0x320/0xd20 net/ipv4/fib_frontend.c:1140 fib_inetaddr_event+0x15d/0x310 net/ipv4/fib_frontend.c:1454 notifier_call_chain kernel/notifier.c:87 [inline] blocking_notifier_call_chain+0xcb/0x150 kernel/notifier.c:382 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1551 [inline] free_pcp_prepare mm/page_alloc.c:1625 [inline] free_unref_page_prepare+0x742/0x750 mm/page_alloc.c:3589 free_unref_page+0x8f/0x530 mm/page_alloc.c:3687 free_the_page mm/page_alloc.c:836 [inline] __free_pages+0x67/0x100 mm/page_alloc.c:5957 __free_slab+0xca/0x1a0 mm/slub.c:2044 free_slab mm/slub.c:2059 [inline] discard_slab mm/slub.c:2065 [inline] __unfreeze_partials+0x160/0x190 mm/slub.c:2614 put_cpu_partial+0xa9/0x100 mm/slub.c:2690 __slab_free+0x1c4/0x280 mm/slub.c:3589 do_slab_free mm/slub.c:3666 [inline] ___cache_free+0xbf/0xd0 mm/slub.c:3722 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0xc6/0x140 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x14a/0x170 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+0x4f/0x2d0 mm/slab.h:768 slab_alloc_node mm/slub.c:3382 [inline] __kmem_cache_alloc_node+0x192/0x2c0 mm/slub.c:3423 kmalloc_trace+0x29/0xb0 mm/slab_common.c:1028 kmalloc include/linux/slab.h:563 [inline] kzalloc include/linux/slab.h:699 [inline] ____ip_mc_inc_group+0x1ab/0x860 net/ipv4/igmp.c:1452 __ip_mc_inc_group net/ipv4/igmp.c:1487 [inline] ip_mc_inc_group net/ipv4/igmp.c:1493 [inline] ip_mc_up+0x112/0x1f0 net/ipv4/igmp.c:1792 Memory state around the buggy address: ffff8881106ebb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881106ebb80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8881106ebc00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8881106ebc80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881106ebd00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== EXT4-fs error (device loop1): ext4_xattr_inode_iget:404: comm syz.1.1275: inode #385950250: comm syz.1.1275: iget: illegal inode # EXT4-fs error (device loop1): ext4_xattr_inode_iget:409: comm syz.1.1275: error while reading EA inode 385950250 err=-117