EXT4-fs (loop5): encrypted files will use data=ordered instead of data journaling mode EXT4-fs (loop5): 1 truncate cleaned up EXT4-fs (loop5): 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 ffff888121cd4850 by task syz.5.3600/14272 CPU: 0 PID: 14272 Comm: syz.5.3600 Tainted: G W 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: 0033:0x7f7a45b8e969 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:00007f7a459ff038 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 00007f7a45db5fa0 RCX: 00007f7a45b8e969 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000180 RBP: 00007f7a45c10ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f7a45db5fa0 R15: 00007fffb3cd3c08 Allocated by task 14272: 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 trie_update_elem+0x98e/0xdd0 kernel/bpf/lpm_trie.c:446 bpf_map_update_value+0x351/0x420 kernel/bpf/syscall.c:228 generic_map_update_batch+0x502/0x780 kernel/bpf/syscall.c:1682 bpf_map_do_batch+0x48c/0x620 kernel/bpf/syscall.c:-1 __sys_bpf+0x624/0x780 kernel/bpf/syscall.c:-1 __do_sys_bpf kernel/bpf/syscall.c:5106 [inline] __se_sys_bpf kernel/bpf/syscall.c:5104 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5104 x64_sys_call+0x488/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:322 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 The buggy address belongs to the object at ffff888121cd4800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 80 bytes inside of 1024-byte region [ffff888121cd4800, ffff888121cd4c00) The buggy address belongs to the physical page: page:ffffea0004873400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x121cd0 head:ffffea0004873400 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 0000000000000000 dead000000000001 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 0x152800(GFP_NOWAIT|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL), pid 8155, tgid 8154 (syz.4.2056), ts 440702435279, free_ts 394613770612 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_node+0xa1/0x1e0 mm/slab_common.c:945 kmalloc_node include/linux/slab.h:589 [inline] bpf_map_kmalloc_node+0xc6/0x2c0 kernel/bpf/syscall.c:454 lpm_trie_node_alloc kernel/bpf/lpm_trie.c:291 [inline] trie_update_elem+0x171/0xdd0 kernel/bpf/lpm_trie.c:338 bpf_map_update_value+0x351/0x420 kernel/bpf/syscall.c:228 generic_map_update_batch+0x502/0x780 kernel/bpf/syscall.c:1682 bpf_map_do_batch+0x48c/0x620 kernel/bpf/syscall.c:-1 __sys_bpf+0x624/0x780 kernel/bpf/syscall.c:-1 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1545 [inline] free_pcp_prepare mm/page_alloc.c:1619 [inline] free_unref_page_prepare+0x742/0x750 mm/page_alloc.c:3581 free_unref_page+0x8f/0x530 mm/page_alloc.c:3677 free_the_page mm/page_alloc.c:830 [inline] __free_pages+0x67/0x100 mm/page_alloc.c:5931 __vunmap+0x9af/0xb70 mm/vmalloc.c:2729 __vfree mm/vmalloc.c:2778 [inline] __vmalloc_area_node mm/vmalloc.c:3129 [inline] __vmalloc_node_range+0x1117/0x13d0 mm/vmalloc.c:3246 __vmalloc_node mm/vmalloc.c:3311 [inline] vzalloc+0x78/0x90 mm/vmalloc.c:3384 xt_counters_alloc+0x44/0x50 net/netfilter/x_tables.c:1379 __do_replace+0xac/0xa80 net/ipv4/netfilter/arp_tables.c:894 do_replace net/ipv4/netfilter/arp_tables.c:989 [inline] do_arpt_set_ctl+0xa0a/0xef0 net/ipv4/netfilter/arp_tables.c:1429 nf_setsockopt+0x284/0x2b0 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0xed/0x100 net/ipv4/ip_sockglue.c:1468 udp_setsockopt+0x8a/0xa0 net/ipv4/udp.c:2780 sock_common_setsockopt+0xb1/0xc0 net/core/sock.c:3698 __sys_setsockopt+0x306/0x4e0 net/socket.c:2278 __do_sys_setsockopt net/socket.c:2289 [inline] __se_sys_setsockopt net/socket.c:2286 [inline] __x64_sys_setsockopt+0xbf/0xd0 net/socket.c:2286 x64_sys_call+0x124/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:55 Memory state around the buggy address: ffff888121cd4700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888121cd4780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888121cd4800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff888121cd4880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888121cd4900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16