loop9: detected capacity change from 0 to 512 EXT4-fs (loop9): encrypted files will use data=ordered instead of data journaling mode EXT4-fs (loop9): 1 truncate cleaned up EXT4-fs (loop9): 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 ffff8881437fd050 by task syz.9.4041/14431 CPU: 0 PID: 14431 Comm: syz.9.4041 Not tainted 6.1.128-syzkaller-00015-gf3c4686f770c #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+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_dirty_inode+0xbd/0x100 fs/ext4/inode.c:6091 __mark_inode_dirty+0x200/0xa60 fs/fs-writeback.c:2439 mark_inode_dirty include/linux/fs.h:2555 [inline] ext4_setattr+0x7b9/0x1a50 fs/ext4/inode.c:5615 notify_change+0xd53/0x1010 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+0x1bb/0x2b0 fs/utimes.c:214 __x64_sys_utime+0x5b/0x70 fs/utimes.c:214 x64_sys_call+0x3c4/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:133 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: 0033:0x7f6c0318d169 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:00007f6c03f2b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000084 RAX: ffffffffffffffda RBX: 00007f6c033a5fa0 RCX: 00007f6c0318d169 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000400000006a80 RBP: 00007f6c0320e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f6c033a5fa0 R15: 00007ffc1209d8a8 Allocated by task 14431: 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_dirty_inode+0xbd/0x100 fs/ext4/inode.c:6091 __mark_inode_dirty+0x200/0xa60 fs/fs-writeback.c:2439 mark_inode_dirty include/linux/fs.h:2555 [inline] ext4_setattr+0x7b9/0x1a50 fs/ext4/inode.c:5615 notify_change+0xd53/0x1010 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+0x1bb/0x2b0 fs/utimes.c:214 __x64_sys_utime+0x5b/0x70 fs/utimes.c:214 x64_sys_call+0x3c4/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:133 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 kvfree_call_rcu+0x9f/0x800 kernel/rcu/tree.c:3445 trie_update_elem+0x926/0xda0 kernel/bpf/lpm_trie.c:446 bpf_map_update_value+0x23a/0x410 kernel/bpf/syscall.c:228 generic_map_update_batch+0x595/0x8c0 kernel/bpf/syscall.c:1679 bpf_map_do_batch+0x4cc/0x630 __sys_bpf+0x66b/0x7f0 __do_sys_bpf kernel/bpf/syscall.c:5111 [inline] __se_sys_bpf kernel/bpf/syscall.c:5109 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5109 x64_sys_call+0x87f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:322 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 The buggy address belongs to the object at ffff8881437fd000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 80 bytes inside of 1024-byte region [ffff8881437fd000, ffff8881437fd400) The buggy address belongs to the physical page: page:ffffea00050dfe00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1437f8 head:ffffea00050dfe00 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 14051, tgid 14050 (syz.4.3910), ts 1046442606658, free_ts 1017553134340 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x213/0x220 mm/page_alloc.c:2637 prep_new_page+0x1b/0x110 mm/page_alloc.c:2644 get_page_from_freelist+0x3a98/0x3b10 mm/page_alloc.c:4539 __alloc_pages+0x234/0x610 mm/page_alloc.c:5837 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+0xa3/0x1e0 mm/slab_common.c:945 kmalloc_node include/linux/slab.h:589 [inline] bpf_map_kmalloc_node+0xd0/0x2c0 kernel/bpf/syscall.c:454 lpm_trie_node_alloc kernel/bpf/lpm_trie.c:291 [inline] trie_update_elem+0x15e/0xda0 kernel/bpf/lpm_trie.c:338 bpf_map_update_value+0x23a/0x410 kernel/bpf/syscall.c:228 generic_map_update_batch+0x595/0x8c0 kernel/bpf/syscall.c:1679 bpf_map_do_batch+0x4cc/0x630 __sys_bpf+0x66b/0x7f0 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+0x9f1/0xa00 mm/page_alloc.c:3581 free_unref_page+0xb2/0x5c0 mm/page_alloc.c:3677 free_the_page mm/page_alloc.c:830 [inline] __free_pages+0x61/0xf0 mm/page_alloc.c:5926 free_pages+0x7c/0x90 mm/page_alloc.c:5937 free_pg_vec net/packet/af_packet.c:4375 [inline] packet_set_ring+0x19bc/0x24e0 net/packet/af_packet.c:4594 packet_release+0x7f8/0xd10 net/packet/af_packet.c:3207 __sock_release net/socket.c:652 [inline] sock_close+0xdf/0x270 net/socket.c:1390 __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 Memory state around the buggy address: ffff8881437fcf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881437fcf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8881437fd000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff8881437fd080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881437fd100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================