================================================================== BUG: KASAN: slab-out-of-bounds in __ext4_iget+0x2f8/0x3eb0 fs/ext4/inode.c:4708 Read of size 8 at addr ffff8880808cf5f0 by task syz-executor.1/10493 CPU: 1 PID: 10493 Comm: syz-executor.1 Not tainted 6.6.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0x163/0x540 mm/kasan/report.c:475 kasan_report+0x175/0x1b0 mm/kasan/report.c:588 __ext4_iget+0x2f8/0x3eb0 fs/ext4/inode.c:4708 ext4_quota_enable fs/ext4/super.c:7038 [inline] ext4_enable_quotas+0x56c/0xb90 fs/ext4/super.c:7074 __ext4_fill_super fs/ext4/super.c:5568 [inline] ext4_fill_super+0x61d8/0x6d10 fs/ext4/super.c:5703 get_tree_bdev+0x416/0x5b0 fs/super.c:1577 vfs_get_tree+0x8c/0x280 fs/super.c:1750 do_new_mount+0x28f/0xae0 fs/namespace.c:3335 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3861 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f4e06e7e1ea Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4e07cadee8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f4e07cadf80 RCX: 00007f4e06e7e1ea RDX: 0000000020000180 RSI: 00000000200005c0 RDI: 00007f4e07cadf40 RBP: 0000000020000180 R08: 00007f4e07cadf80 R09: 0000000001008000 R10: 0000000001008000 R11: 0000000000000202 R12: 00000000200005c0 R13: 00007f4e07cadf40 R14: 00000000000005ba R15: 0000000020000240 Allocated by task 19230: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 __kasan_slab_alloc+0x66/0x70 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x67/0x3d0 mm/slab.h:762 slab_alloc_node mm/slub.c:3478 [inline] slab_alloc mm/slub.c:3486 [inline] __kmem_cache_alloc_lru mm/slub.c:3493 [inline] kmem_cache_alloc_lru+0x122/0x300 mm/slub.c:3509 alloc_inode_sb include/linux/fs.h:2868 [inline] ntfs_alloc_inode+0x28/0x80 fs/ntfs3/super.c:546 alloc_inode fs/inode.c:259 [inline] iget5_locked+0xa0/0x270 fs/inode.c:1269 ntfs_iget5+0xc6/0x38e0 fs/ntfs3/inode.c:525 ntfs_fill_super+0x2dec/0x4c30 fs/ntfs3/super.c:1244 get_tree_bdev+0x416/0x5b0 fs/super.c:1577 vfs_get_tree+0x8c/0x280 fs/super.c:1750 do_new_mount+0x28f/0xae0 fs/namespace.c:3335 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3861 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xad/0xc0 mm/kasan/generic.c:492 __call_rcu_common kernel/rcu/tree.c:2653 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:2767 ntfs_fill_super+0x2c76/0x4c30 fs/ntfs3/super.c:1226 get_tree_bdev+0x416/0x5b0 fs/super.c:1577 vfs_get_tree+0x8c/0x280 fs/super.c:1750 do_new_mount+0x28f/0xae0 fs/namespace.c:3335 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3861 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Second to last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xad/0xc0 mm/kasan/generic.c:492 __call_rcu_common kernel/rcu/tree.c:2653 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:2767 dispose_list fs/inode.c:697 [inline] evict_inodes+0x5f8/0x690 fs/inode.c:747 generic_shutdown_super+0x9d/0x2c0 fs/super.c:672 kill_block_super+0x41/0x70 fs/super.c:1646 ntfs3_kill_sb+0x44/0x1b0 fs/ntfs3/super.c:1727 deactivate_locked_super+0xa4/0x110 fs/super.c:481 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1254 task_work_run+0x24a/0x300 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:296 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff8880808ceea0 which belongs to the cache ntfs_inode_cache of size 1760 The buggy address is located 112 bytes to the right of allocated 1760-byte region [ffff8880808ceea0, ffff8880808cf580) The buggy address belongs to the physical page: page:ffffea0002023200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x808c8 head:ffffea0002023200 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff888027f88401 flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000840 ffff888147672780 ffffea000202cc00 dead000000000002 raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888027f88401 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 6550, tgid 6549 (syz-executor.4), ts 232012407693, free_ts 223062876822 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1536 prep_new_page mm/page_alloc.c:1543 [inline] get_page_from_freelist+0x31db/0x3360 mm/page_alloc.c:3170 __alloc_pages+0x255/0x670 mm/page_alloc.c:4426 alloc_slab_page+0x6a/0x160 mm/slub.c:1870 allocate_slab mm/slub.c:2017 [inline] new_slab+0x84/0x2f0 mm/slub.c:2070 ___slab_alloc+0xc85/0x1310 mm/slub.c:3223 __slab_alloc mm/slub.c:3322 [inline] __slab_alloc_node mm/slub.c:3375 [inline] slab_alloc_node mm/slub.c:3468 [inline] slab_alloc mm/slub.c:3486 [inline] __kmem_cache_alloc_lru mm/slub.c:3493 [inline] kmem_cache_alloc_lru+0x1bf/0x300 mm/slub.c:3509 alloc_inode_sb include/linux/fs.h:2868 [inline] ntfs_alloc_inode+0x28/0x80 fs/ntfs3/super.c:546 alloc_inode fs/inode.c:259 [inline] iget5_locked+0xa0/0x270 fs/inode.c:1269 ntfs_iget5+0xc6/0x38e0 fs/ntfs3/inode.c:525 ntfs_fill_super+0x2c18/0x4c30 fs/ntfs3/super.c:1213 get_tree_bdev+0x416/0x5b0 fs/super.c:1577 vfs_get_tree+0x8c/0x280 fs/super.c:1750 do_new_mount+0x28f/0xae0 fs/namespace.c:3335 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3861 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1136 [inline] free_unref_page_prepare+0x8c3/0x9f0 mm/page_alloc.c:2312 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2405 discard_slab mm/slub.c:2116 [inline] __unfreeze_partials+0x1dc/0x220 mm/slub.c:2655 put_cpu_partial+0x17b/0x250 mm/slub.c:2731 __slab_free+0x2b6/0x390 mm/slub.c:3679 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x75/0xe0 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x14b/0x160 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x23/0x70 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x67/0x3d0 mm/slab.h:762 slab_alloc_node mm/slub.c:3478 [inline] __kmem_cache_alloc_node+0x141/0x270 mm/slub.c:3517 __do_kmalloc_node mm/slab_common.c:1022 [inline] __kmalloc+0xa8/0x230 mm/slab_common.c:1036 kmalloc include/linux/slab.h:603 [inline] qtree_write_dquot+0xf7/0x530 fs/quota/quota_tree.c:413 v2_write_dquot+0x120/0x190 fs/quota/quota_v2.c:358 dquot_commit+0x3c4/0x520 fs/quota/dquot.c:510 ext4_write_dquot+0x1f2/0x2c0 fs/ext4/super.c:6852 mark_dquot_dirty fs/quota/dquot.c:370 [inline] mark_all_dquot_dirty fs/quota/dquot.c:408 [inline] dquot_free_inode+0x97d/0xe40 fs/quota/dquot.c:1950 Memory state around the buggy address: ffff8880808cf480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880808cf500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880808cf580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880808cf600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880808cf680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================