EXT4-fs (loop4): mounted filesystem without journal. Quota mode: none. ================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x909/0x1fa0 fs/ext4/xattr.c:1732 Read of size 18446744073709551572 at addr ffff8880269b0850 by task syz.4.199/4987 CPU: 1 PID: 4987 Comm: syz.4.199 Not tainted 6.1.134-syzkaller #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+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0x15f/0x4f0 mm/kasan/report.c:427 kasan_report+0x136/0x160 mm/kasan/report.c:531 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x27f/0x290 mm/kasan/generic.c:189 memmove+0x25/0x60 mm/kasan/shadow.c:54 ext4_xattr_set_entry+0x909/0x1fa0 fs/ext4/xattr.c:1732 ext4_xattr_block_set+0x97e/0x3820 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+0x302/0x400 fs/ext4/inode.c:5936 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5979 [inline] __ext4_mark_inode_dirty+0x54f/0x920 fs/ext4/inode.c:6057 ext4_dirty_inode+0xbf/0x100 fs/ext4/inode.c:6089 __mark_inode_dirty+0x331/0xf80 fs/fs-writeback.c:2433 mark_inode_dirty include/linux/fs.h:2546 [inline] ext4_setattr+0x755/0x1a00 fs/ext4/inode.c:5613 notify_change+0xce3/0xfc0 fs/attr.c:499 chown_common+0x5aa/0x900 fs/open.c:736 do_fchownat+0x169/0x240 fs/open.c:767 __do_sys_lchown fs/open.c:792 [inline] __se_sys_lchown fs/open.c:790 [inline] __x64_sys_lchown+0x81/0x90 fs/open.c:790 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: 0033:0x7f4765d8d169 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:00007f4766cc9038 EFLAGS: 00000246 ORIG_RAX: 000000000000005e RAX: ffffffffffffffda RBX: 00007f4765fa5fa0 RCX: 00007f4765d8d169 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000000 RBP: 00007f4765e0e730 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f4765fa5fa0 R15: 00007fffdc241bd8 Allocated by task 4987: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:936 [inline] __kmalloc_node_track_caller+0xb1/0x220 mm/slab_common.c:956 kmemdup+0x26/0x60 mm/util.c:129 _Z7kmemdupPKvU17pass_object_size0mj include/linux/fortify-string.h:585 [inline] ext4_xattr_block_set+0x7f4/0x3820 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+0x302/0x400 fs/ext4/inode.c:5936 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5979 [inline] __ext4_mark_inode_dirty+0x54f/0x920 fs/ext4/inode.c:6057 ext4_dirty_inode+0xbf/0x100 fs/ext4/inode.c:6089 __mark_inode_dirty+0x331/0xf80 fs/fs-writeback.c:2433 mark_inode_dirty include/linux/fs.h:2546 [inline] ext4_setattr+0x755/0x1a00 fs/ext4/inode.c:5613 notify_change+0xce3/0xfc0 fs/attr.c:499 chown_common+0x5aa/0x900 fs/open.c:736 do_fchownat+0x169/0x240 fs/open.c:767 __do_sys_lchown fs/open.c:792 [inline] __se_sys_lchown fs/open.c:790 [inline] __x64_sys_lchown+0x81/0x90 fs/open.c:790 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 ffff8880269b0800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 80 bytes inside of 1024-byte region [ffff8880269b0800, ffff8880269b0c00) The buggy address belongs to the physical page: page:ffffea00009a6c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x269b0 head:ffffea00009a6c00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea000068be00 dead000000000002 ffff888017c41dc0 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 0xd2000(__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 75, tgid 75 (kworker/u4:4), ts 11359873282, free_ts 0 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2532 prep_new_page mm/page_alloc.c:2539 [inline] get_page_from_freelist+0x3731/0x38d0 mm/page_alloc.c:4328 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5606 __alloc_pages_node include/linux/gfp.h:237 [inline] alloc_slab_page+0x59/0x150 mm/slub.c:1796 allocate_slab mm/slub.c:1939 [inline] new_slab+0x84/0x2d0 mm/slub.c:1992 ___slab_alloc+0xc20/0x1270 mm/slub.c:3180 __slab_alloc mm/slub.c:3279 [inline] slab_alloc_node mm/slub.c:3364 [inline] __kmem_cache_alloc_node+0x19f/0x260 mm/slub.c:3437 kmalloc_node_trace+0x23/0xe0 mm/slab_common.c:1039 kmalloc_node include/linux/slab.h:585 [inline] kzalloc_node include/linux/slab.h:710 [inline] blk_mq_alloc_hctx block/blk-mq.c:3711 [inline] blk_mq_alloc_and_init_hctx+0x18b/0xd60 block/blk-mq.c:4189 blk_mq_realloc_hw_ctxs+0x194/0x4a0 block/blk-mq.c:4222 blk_mq_init_allocated_queue+0x51c/0x1710 block/blk-mq.c:4284 blk_mq_init_queue_data block/blk-mq.c:4093 [inline] blk_mq_init_queue+0xa1/0x120 block/blk-mq.c:4103 scsi_alloc_sdev+0x74b/0xb30 drivers/scsi/scsi_scan.c:335 scsi_probe_and_add_lun+0x1cf/0x4b70 drivers/scsi/scsi_scan.c:1186 __scsi_scan_target+0x1fc/0x10b0 drivers/scsi/scsi_scan.c:1718 scsi_scan_channel drivers/scsi/scsi_scan.c:1806 [inline] scsi_scan_host_selected+0x37a/0x690 drivers/scsi/scsi_scan.c:1835 page_owner free stack trace missing Memory state around the buggy address: ffff8880269b0700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880269b0780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880269b0800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff8880269b0880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880269b0900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================