================================================================== BUG: KASAN: slab-use-after-free in check_igot_inode+0x187/0x1b0 fs/ext4/inode.c:4622 Read of size 8 at addr ffff88803ae7d550 by task syz-executor.5/4177 CPU: 1 PID: 4177 Comm: syz-executor.5 Not tainted 6.5.0-rc4-next-20230731-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xc4/0x620 mm/kasan/report.c:475 kasan_report+0xda/0x110 mm/kasan/report.c:588 check_igot_inode+0x187/0x1b0 fs/ext4/inode.c:4622 __ext4_iget+0x14fb/0x4310 fs/ext4/inode.c:4674 __ext4_fill_super fs/ext4/super.c:5467 [inline] ext4_fill_super+0x64c9/0xaf30 fs/ext4/super.c:5696 get_tree_bdev+0x390/0x6a0 fs/super.c:1345 vfs_get_tree+0x88/0x350 fs/super.c:1521 do_new_mount fs/namespace.c:3335 [inline] path_mount+0x1492/0x1ed0 fs/namespace.c:3662 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount fs/namespace.c:3861 [inline] __x64_sys_mount+0x293/0x310 fs/namespace.c:3861 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f23a987e1ea 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:00007f23aa619ee8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f23aa619f80 RCX: 00007f23a987e1ea RDX: 0000000020000580 RSI: 00000000200005c0 RDI: 00007f23aa619f40 RBP: 0000000020000580 R08: 00007f23aa619f80 R09: 0000000001008002 R10: 0000000001008002 R11: 0000000000000202 R12: 00000000200005c0 R13: 00007f23aa619f40 R14: 00000000000005d8 R15: 0000000020000240 Allocated by task 3712: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 __kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:762 [inline] 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+0x21a/0x630 mm/slub.c:3509 alloc_inode_sb include/linux/fs.h:2850 [inline] reiserfs_alloc_inode+0x26/0xb0 fs/reiserfs/super.c:642 alloc_inode+0x5d/0x220 fs/inode.c:260 new_inode_pseudo fs/inode.c:1018 [inline] new_inode+0x29/0x270 fs/inode.c:1046 reiserfs_mkdir+0x214/0x9a0 fs/reiserfs/namei.c:813 xattr_mkdir fs/reiserfs/xattr.c:77 [inline] create_privroot fs/reiserfs/xattr.c:891 [inline] reiserfs_xattr_init+0x57f/0xbb0 fs/reiserfs/xattr.c:1007 reiserfs_fill_super+0x2139/0x3150 fs/reiserfs/super.c:2175 mount_bdev+0x1f3/0x350 fs/super.c:1398 legacy_get_tree+0x109/0x220 fs/fs_context.c:611 vfs_get_tree+0x88/0x350 fs/super.c:1521 do_new_mount fs/namespace.c:3335 [inline] path_mount+0x1492/0x1ed0 fs/namespace.c:3662 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount fs/namespace.c:3861 [inline] __x64_sys_mount+0x293/0x310 fs/namespace.c:3861 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Last potentially related work creation: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:492 __call_rcu_common.constprop.0+0x9a/0x790 kernel/rcu/tree.c:2653 destroy_inode+0x129/0x1b0 fs/inode.c:315 iput_final fs/inode.c:1791 [inline] iput.part.0+0x55e/0x7a0 fs/inode.c:1817 iput+0x5c/0x80 fs/inode.c:1807 reiserfs_new_inode+0x4b5/0x20b0 fs/reiserfs/inode.c:2152 reiserfs_mkdir+0x4c0/0x9a0 fs/reiserfs/namei.c:843 xattr_mkdir fs/reiserfs/xattr.c:77 [inline] create_privroot fs/reiserfs/xattr.c:891 [inline] reiserfs_xattr_init+0x57f/0xbb0 fs/reiserfs/xattr.c:1007 reiserfs_fill_super+0x2139/0x3150 fs/reiserfs/super.c:2175 mount_bdev+0x1f3/0x350 fs/super.c:1398 legacy_get_tree+0x109/0x220 fs/fs_context.c:611 vfs_get_tree+0x88/0x350 fs/super.c:1521 do_new_mount fs/namespace.c:3335 [inline] path_mount+0x1492/0x1ed0 fs/namespace.c:3662 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount fs/namespace.c:3861 [inline] __x64_sys_mount+0x293/0x310 fs/namespace.c:3861 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88803ae7cf80 which belongs to the cache reiser_inode_cache of size 1568 The buggy address is located 1488 bytes inside of freed 1568-byte region [ffff88803ae7cf80, ffff88803ae7d5a0) The buggy address belongs to the physical page: page:ffffea0000eb9e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88803ae7cf80 pfn:0x3ae78 head:ffffea0000eb9e00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff888068866c01 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000010200 ffff888016a92a00 dead000000000122 0000000000000000 raw: ffff88803ae7cf80 000000008013000e 00000001ffffffff ffff888068866c01 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d20d0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 17526, tgid 17524 (syz-executor.3), ts 594821350913, free_ts 593099480746 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2d2/0x350 mm/page_alloc.c:1569 prep_new_page mm/page_alloc.c:1576 [inline] get_page_from_freelist+0x10d7/0x31b0 mm/page_alloc.c:3256 __alloc_pages+0x1d0/0x4a0 mm/page_alloc.c:4512 alloc_pages+0x1a9/0x270 mm/mempolicy.c:2292 alloc_slab_page mm/slub.c:1870 [inline] allocate_slab+0x24e/0x380 mm/slub.c:2017 new_slab mm/slub.c:2070 [inline] ___slab_alloc+0x8bc/0x1570 mm/slub.c:3223 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3322 __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+0x4e4/0x630 mm/slub.c:3509 alloc_inode_sb include/linux/fs.h:2850 [inline] reiserfs_alloc_inode+0x26/0xb0 fs/reiserfs/super.c:642 alloc_inode+0x5d/0x220 fs/inode.c:260 iget5_locked fs/inode.c:1285 [inline] iget5_locked+0x63/0xe0 fs/inode.c:1278 reiserfs_fill_super+0x10e7/0x3150 fs/reiserfs/super.c:2053 mount_bdev+0x1f3/0x350 fs/super.c:1398 legacy_get_tree+0x109/0x220 fs/fs_context.c:611 vfs_get_tree+0x88/0x350 fs/super.c:1521 do_new_mount fs/namespace.c:3335 [inline] path_mount+0x1492/0x1ed0 fs/namespace.c:3662 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1160 [inline] free_unref_page_prepare+0x508/0xb90 mm/page_alloc.c:2383 free_unref_page+0x33/0x3b0 mm/page_alloc.c:2478 __unfreeze_partials+0x21d/0x240 mm/slub.c:2655 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x18b/0x1d0 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x65/0x90 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:762 [inline] 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+0x172/0x3b0 mm/slub.c:3502 getname_flags.part.0+0x50/0x4d0 fs/namei.c:140 getname_flags+0x9c/0xf0 include/linux/audit.h:319 user_path_at_empty+0x2c/0x60 fs/namei.c:2906 do_readlinkat+0xdd/0x2f0 fs/stat.c:516 __do_sys_readlink fs/stat.c:549 [inline] __se_sys_readlink fs/stat.c:546 [inline] __x64_sys_readlink+0x78/0xb0 fs/stat.c:546 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff88803ae7d400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88803ae7d480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88803ae7d500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88803ae7d580: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc ffff88803ae7d600: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================