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 ffff88810c936050 by task syz-executor167/290 CPU: 0 PID: 290 Comm: syz-executor167 Not tainted 6.1.141-syzkaller-00039-g145c7fad733f #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: 0033:0x7fa4d1075af9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe0dae8f58 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000200000000040 RCX: 00007fa4d1075af9 RDX: 00007fa4d1075af9 RSI: 00007fa4d1075af9 RDI: 0000200000000180 RBP: 0031656c69662f2e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0032656c69662f2e R13: 00007ffe0dae9138 R14: 0000000000000001 R15: 0000000000000001 Allocated by task 290: 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: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 The buggy address belongs to the object at ffff88810c936000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 80 bytes inside of 1024-byte region [ffff88810c936000, ffff88810c936400) The buggy address belongs to the physical page: page:ffffea0004324c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10c930 head:ffffea0004324c00 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 4036989767, 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+0x2c7b/0x2cf0 mm/page_alloc.c:4539 __alloc_pages+0x19e/0x3a0 mm/page_alloc.c:5850 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 kmalloc_trace+0x29/0xb0 mm/slab_common.c:1028 kmalloc include/linux/slab.h:563 [inline] kmalloc_array include/linux/slab.h:614 [inline] kcalloc include/linux/slab.h:646 [inline] rtnl_register_internal+0xe5/0x430 net/core/rtnetlink.c:223 rtnl_register_module+0x3e/0x50 net/core/rtnetlink.c:283 cgw_module_init+0xda/0x1b0 net/can/gw.c:1317 do_one_initcall+0x198/0x530 init/main.c:1298 do_initcall_level+0x16f/0x2d0 init/main.c:1371 do_initcalls+0x50/0x92 init/main.c:1387 page_owner free stack trace missing Memory state around the buggy address: ffff88810c935f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88810c935f80: fc fc fc fc fc fc fc fc fc fc fc