EXT4-fs (loop0): encrypted files will use data=ordered instead of data journaling mode EXT4-fs (loop0): 1 truncate cleaned up EXT4-fs (loop0): mounted filesystem without journal. Quota mode: writeback. ================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x979/0x21d0 fs/ext4/xattr.c:1741 Read of size 18446744073709551572 at addr ffff88811f1d3850 by task syz.0.609/3022 CPU: 1 PID: 3022 Comm: syz.0.609 Not tainted 6.1.138-syzkaller-00046-gdb710ea87c32 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: __dump_stack+0x21/0x24 lib/dump_stack.c:88 dump_stack_lvl+0xee/0x150 lib/dump_stack.c:106 print_address_description+0x71/0x210 mm/kasan/report.c:316 print_report+0x4a/0x60 mm/kasan/report.c:427 kasan_report+0x122/0x150 mm/kasan/report.c:531 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+0x979/0x21d0 fs/ext4/xattr.c:1741 ext4_xattr_block_set+0xada/0x3270 fs/ext4/xattr.c:1988 ext4_xattr_move_to_block fs/ext4/xattr.c:2625 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2700 [inline] ext4_expand_extra_isize_ea+0xf30/0x1990 fs/ext4/xattr.c:2792 __ext4_expand_extra_isize+0x2fe/0x3e0 fs/ext4/inode.c:5967 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6010 [inline] __ext4_mark_inode_dirty+0x3cf/0x600 fs/ext4/inode.c:6088 __ext4_unlink+0x673/0xb00 fs/ext4/namei.c:3341 ext4_unlink+0x13a/0x3a0 fs/ext4/namei.c:3370 vfs_unlink+0x39f/0x630 fs/namei.c:4321 do_unlinkat+0x31f/0x6b0 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+0x958/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:88 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: 0033:0x7f686b38e969 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:00007f686c16f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 00007f686b5b5fa0 RCX: 00007f686b38e969 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000180 RBP: 00007f686b410ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f686b5b5fa0 R15: 00007ffde9b34328 Allocated by task 3022: 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 _Z7kmemdupPKvU17pass_object_size0mj include/linux/fortify-string.h:585 [inline] ext4_xattr_block_set+0x9dc/0x3270 fs/ext4/xattr.c:1936 ext4_xattr_move_to_block fs/ext4/xattr.c:2625 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2700 [inline] ext4_expand_extra_isize_ea+0xf30/0x1990 fs/ext4/xattr.c:2792 __ext4_expand_extra_isize+0x2fe/0x3e0 fs/ext4/inode.c:5967 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6010 [inline] __ext4_mark_inode_dirty+0x3cf/0x600 fs/ext4/inode.c:6088 __ext4_unlink+0x673/0xb00 fs/ext4/namei.c:3341 ext4_unlink+0x13a/0x3a0 fs/ext4/namei.c:3370 vfs_unlink+0x39f/0x630 fs/namei.c:4321 do_unlinkat+0x31f/0x6b0 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+0x958/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:88 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:1727 unregister_sysctl_table+0x75/0x120 fs/proc/proc_sysctl.c:1765 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:7239 [inline] addrconf_ifdown+0x1650/0x1910 net/ipv6/addrconf.c:3976 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:10939 ip_tunnel_delete_nets+0x346/0x390 net/ipv4/ip_tunnel.c:1153 erspan_exit_batch_net+0x22/0x30 net/ipv4/ip_gre.c:1723 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:2299 worker_thread+0xa29/0x11f0 kernel/workqueue.c:2446 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 ffff88811f1d3800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 80 bytes inside of 1024-byte region [ffff88811f1d3800, ffff88811f1d3c00) The buggy address belongs to the physical page: page:ffffea00047c7400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11f1d0 head:ffffea00047c7400 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 ffffea0004311c00 dead000000000002 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 187, tgid 187 (rcS), ts 6671617058, free_ts 0 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1f5/0x210 mm/page_alloc.c:2637 prep_new_page+0x1c/0x110 mm/page_alloc.c:2644 get_page_from_freelist+0x2c6e/0x2ce0 mm/page_alloc.c:4539 __alloc_pages+0x19e/0x3a0 mm/page_alloc.c:5842 alloc_slab_page+0x6e/0xf0 include/linux/gfp.h:-1 allocate_slab mm/slub.c:1962 [inline] new_slab+0x98/0x3d0 mm/slub.c:2015 ___slab_alloc+0x6f6/0xb50 mm/slub.c:3203 __slab_alloc+0x5e/0xa0 mm/slub.c:3302 slab_alloc_node mm/slub.c:3387 [inline] __kmem_cache_alloc_node+0x203/0x2c0 mm/slub.c:3462 __do_kmalloc_node mm/slab_common.c:937 [inline] __kmalloc+0xa1/0x1e0 mm/slab_common.c:951 kmalloc include/linux/slab.h:568 [inline] load_elf_phdrs fs/binfmt_elf.c:481 [inline] load_elf_binary+0x2cf/0x2710 fs/binfmt_elf.c:861 search_binary_handler fs/exec.c:1743 [inline] exec_binprm fs/exec.c:1784 [inline] bprm_execve+0x787/0x1440 fs/exec.c:1853 do_execveat_common+0x915/0xa70 fs/exec.c:1958 do_execve fs/exec.c:2032 [inline] __do_sys_execve fs/exec.c:2108 [inline] __se_sys_execve fs/exec.c:2103 [inline] __x64_sys_execve+0x92/0xb0 fs/exec.c:2103 x64_sys_call+0x98/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:60 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 page_owner free stack trace missing Memory state around the buggy address: ffff88811f1d3700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88811f1d3780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88811f1d3800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88811f1d3880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88811f1d3900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 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