EXT4-fs (loop0): 1 truncate cleaned up EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x8e9/0x1e20 fs/ext4/xattr.c:1773 Read of size 18446744073709551572 at addr ffff88804034f050 by task syz.0.16/5494 CPU: 0 UID: 0 PID: 5494 Comm: syz.0.16 Not tainted 6.16.0-rc7-syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xca/0x230 mm/kasan/report.c:480 kasan_report+0x118/0x150 mm/kasan/report.c:593 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x2b0/0x2c0 mm/kasan/generic.c:189 __asan_memmove+0x29/0x70 mm/kasan/shadow.c:94 ext4_xattr_set_entry+0x8e9/0x1e20 fs/ext4/xattr.c:1773 ext4_xattr_block_set+0x872/0x2ac0 fs/ext4/xattr.c:2020 ext4_xattr_move_to_block fs/ext4/xattr.c:2659 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2734 [inline] ext4_expand_extra_isize_ea+0x12d5/0x1ea0 fs/ext4/xattr.c:2822 __ext4_expand_extra_isize+0x30d/0x400 fs/ext4/inode.c:6306 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6349 [inline] __ext4_mark_inode_dirty+0x46c/0x700 fs/ext4/inode.c:6427 __ext4_unlink+0x631/0xab0 fs/ext4/namei.c:3280 ext4_unlink+0x216/0x5d0 fs/ext4/namei.c:3310 vfs_unlink+0x391/0x650 fs/namei.c:4595 do_unlinkat+0x350/0x560 fs/namei.c:4659 __do_sys_unlink fs/namei.c:4705 [inline] __se_sys_unlink fs/namei.c:4703 [inline] __x64_sys_unlink+0x47/0x50 fs/namei.c:4703 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6a2838e9a9 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:00007ffd7d90efb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 00007f6a285b5fa0 RCX: 00007f6a2838e9a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000180 RBP: 00007f6a28410d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f6a285b5fa0 R14: 00007f6a285b5fa0 R15: 0000000000000001 Allocated by task 5494: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4328 [inline] __kmalloc_node_track_caller_noprof+0x271/0x4e0 mm/slub.c:4347 kmemdup_noprof+0x2b/0x70 mm/util.c:137 kmemdup_noprof include/linux/fortify-string.h:765 [inline] ext4_xattr_block_set+0x781/0x2ac0 fs/ext4/xattr.c:1968 ext4_xattr_move_to_block fs/ext4/xattr.c:2659 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2734 [inline] ext4_expand_extra_isize_ea+0x12d5/0x1ea0 fs/ext4/xattr.c:2822 __ext4_expand_extra_isize+0x30d/0x400 fs/ext4/inode.c:6306 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6349 [inline] __ext4_mark_inode_dirty+0x46c/0x700 fs/ext4/inode.c:6427 __ext4_unlink+0x631/0xab0 fs/ext4/namei.c:3280 ext4_unlink+0x216/0x5d0 fs/ext4/namei.c:3310 vfs_unlink+0x391/0x650 fs/namei.c:4595 do_unlinkat+0x350/0x560 fs/namei.c:4659 __do_sys_unlink fs/namei.c:4705 [inline] __se_sys_unlink fs/namei.c:4703 [inline] __x64_sys_unlink+0x47/0x50 fs/namei.c:4703 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88804034f000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 80 bytes inside of 1024-byte region [ffff88804034f000, ffff88804034f400) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4034c head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x4fff00000000040(head|node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000040 ffff88801a441dc0 ffffea0000fd5000 dead000000000004 raw: 0000000000000000 0000000080080008 00000000f5000000 0000000000000000 head: 04fff00000000040 ffff88801a441dc0 ffffea0000fd5000 dead000000000004 head: 0000000000000000 0000000080080008 00000000f5000000 0000000000000000 head: 04fff00000000002 ffffea000100d301 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 29775688485, free_ts 29772010363 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1704 prep_new_page mm/page_alloc.c:1712 [inline] get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3669 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4959 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2419 alloc_slab_page mm/slub.c:2451 [inline] allocate_slab+0x8a/0x3b0 mm/slub.c:2619 new_slab mm/slub.c:2673 [inline] ___slab_alloc+0xbfc/0x1480 mm/slub.c:3859 __slab_alloc mm/slub.c:3949 [inline] __slab_alloc_node mm/slub.c:4024 [inline] slab_alloc_node mm/slub.c:4185 [inline] __do_kmalloc_node mm/slub.c:4327 [inline] __kmalloc_noprof+0x305/0x4f0 mm/slub.c:4340 kmalloc_noprof include/linux/slab.h:909 [inline] kmalloc_array_noprof include/linux/slab.h:948 [inline] ext4_mb_init+0x81d/0x2860 fs/ext4/mballoc.c:3659 __ext4_fill_super fs/ext4/super.c:5554 [inline] ext4_fill_super+0x5231/0x6080 fs/ext4/super.c:5724 get_tree_bdev_flags+0x40b/0x4d0 fs/super.c:1681 vfs_get_tree+0x92/0x2b0 fs/super.c:1804 do_new_mount+0x24a/0xa40 fs/namespace.c:3902 init_mount+0xd1/0x120 fs/init.c:25 do_mount_root+0x120/0x2b0 init/do_mounts.c:165 mount_root_generic+0x1e0/0x440 init/do_mounts.c:204 prepare_namespace+0xc2/0x100 init/do_mounts.c:491 page last free pid 1 tgid 1 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1248 [inline] __free_frozen_pages+0xc71/0xe70 mm/page_alloc.c:2706 stack_depot_save_flags+0x445/0x900 lib/stackdepot.c:678 kasan_save_stack mm/kasan/common.c:48 [inline] kasan_save_track+0x4f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4328 [inline] __kmalloc_noprof+0x27a/0x4f0 mm/slub.c:4340 kmalloc_noprof include/linux/slab.h:909 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] shrinker_alloc+0x199/0xa70 mm/shrinker.c:724 mb_cache_create+0x32e/0x540 fs/mbcache.c:378 __ext4_fill_super fs/ext4/super.c:5443 [inline] ext4_fill_super+0x4087/0x6080 fs/ext4/super.c:5724 get_tree_bdev_flags+0x40b/0x4d0 fs/super.c:1681 vfs_get_tree+0x92/0x2b0 fs/super.c:1804 do_new_mount+0x24a/0xa40 fs/namespace.c:3902 init_mount+0xd1/0x120 fs/init.c:25 do_mount_root+0x120/0x2b0 init/do_mounts.c:165 mount_root_generic+0x1e0/0x440 init/do_mounts.c:204 prepare_namespace+0xc2/0x100 init/do_mounts.c:491 kernel_init_freeable+0x41a/0x570 init/main.c:1597 Memory state around the buggy address: ffff88804034ef00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88804034ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88804034f000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88804034f080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88804034f100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================