================================================================== BUG: KASAN: use-after-free in xfs_dquot_type fs/xfs/xfs_dquot.h:144 [inline] BUG: KASAN: use-after-free in xfs_qm_dqfree_one+0x132/0x170 fs/xfs/xfs_qm.c:1608 Read of size 1 at addr ffff88807f51b518 by task syz-executor.3/27400 CPU: 0 PID: 27400 Comm: syz-executor.3 Not tainted 5.15.130-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description+0x63/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x16b/0x1c0 mm/kasan/report.c:451 xfs_dquot_type fs/xfs/xfs_dquot.h:144 [inline] xfs_qm_dqfree_one+0x132/0x170 fs/xfs/xfs_qm.c:1608 xfs_qm_shrink_scan+0x314/0x3d0 fs/xfs/xfs_qm.c:523 do_shrink_slab+0x542/0xda0 mm/vmscan.c:758 shrink_slab+0x233/0x960 mm/vmscan.c:918 drop_slab_node+0xed/0x180 mm/vmscan.c:953 drop_slab+0x8b/0x120 mm/vmscan.c:963 drop_caches_sysctl_handler+0xb3/0x160 fs/drop_caches.c:66 proc_sys_call_handler+0x541/0x8a0 fs/proc/proc_sysctl.c:587 do_iter_readv_writev+0x594/0x7a0 do_iter_write+0x1ea/0x760 fs/read_write.c:855 iter_file_splice_write+0x806/0xfa0 fs/splice.c:689 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0xe3/0x1c0 fs/splice.c:936 splice_direct_to_actor+0x500/0xc10 fs/splice.c:891 do_splice_direct+0x285/0x3d0 fs/splice.c:979 do_sendfile+0x625/0xff0 fs/read_write.c:1249 __do_sys_sendfile64 fs/read_write.c:1311 [inline] __se_sys_sendfile64+0xfc/0x1e0 fs/read_write.c:1303 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fdc8e2a0ae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fdc8c8220c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fdc8e3bff80 RCX: 00007fdc8e2a0ae9 RDX: 0000000020002080 RSI: 0000000000000003 RDI: 0000000000000004 RBP: 00007fdc8e2ec47a R08: 0000000000000000 R09: 0000000000000000 R10: 000000001eee061f R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fdc8e3bff80 R15: 00007fff53eb54e8 Allocated by task 27360: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x8e/0xc0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x53/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0xf3/0x280 mm/slub.c:3233 kmem_cache_zalloc include/linux/slab.h:711 [inline] xfs_dquot_alloc+0x36/0x610 fs/xfs/xfs_dquot.c:461 xfs_qm_dqread+0xc3/0x770 fs/xfs/xfs_dquot.c:686 xfs_qm_dqget+0x26f/0x4e0 fs/xfs/xfs_dquot.c:897 xfs_qm_vop_dqalloc+0x770/0xee0 fs/xfs/xfs_qm.c:1708 xfs_setattr_nonsize+0x2e9/0xc40 fs/xfs/xfs_iops.c:709 xfs_vn_setattr+0x2f7/0x340 fs/xfs/xfs_iops.c:1050 notify_change+0xd4d/0x1000 fs/attr.c:489 chown_common+0x592/0x890 fs/open.c:680 do_fchownat+0x169/0x240 fs/open.c:711 __do_sys_lchown fs/open.c:736 [inline] __se_sys_lchown fs/open.c:734 [inline] __x64_sys_lchown+0x81/0x90 fs/open.c:734 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb The buggy address belongs to the object at ffff88807f51b500 which belongs to the cache xfs_dquot of size 720 The buggy address is located 24 bytes inside of 720-byte region [ffff88807f51b500, ffff88807f51b7d0) The buggy address belongs to the page: page:ffffea0001fd4600 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88807f519090 pfn:0x7f518 head:ffffea0001fd4600 order:2 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0001eb7400 0000000200000002 ffff888146b04c80 raw: ffff88807f519090 000000008013000b 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 10554, ts 600103820736, free_ts 598360122897 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159 __alloc_pages+0x272/0x700 mm/page_alloc.c:5421 alloc_slab_page mm/slub.c:1775 [inline] allocate_slab mm/slub.c:1912 [inline] new_slab+0xbb/0x4b0 mm/slub.c:1975 ___slab_alloc+0x6f6/0xe10 mm/slub.c:3008 __slab_alloc mm/slub.c:3095 [inline] slab_alloc_node mm/slub.c:3186 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0x18e/0x280 mm/slub.c:3233 kmem_cache_zalloc include/linux/slab.h:711 [inline] xfs_dquot_alloc+0x36/0x610 fs/xfs/xfs_dquot.c:461 xfs_qm_dqread+0xc3/0x770 fs/xfs/xfs_dquot.c:686 xfs_qm_set_defquota+0xaa/0x330 fs/xfs/xfs_qm.c:550 xfs_qm_init_quotainfo+0x559/0x970 fs/xfs/xfs_qm.c:682 xfs_qm_mount_quotas+0x90/0x610 fs/xfs/xfs_qm.c:1428 xfs_mountfs+0x162b/0x1ca0 fs/xfs/xfs_mount.c:904 xfs_fs_fill_super+0xfd4/0x1210 fs/xfs/xfs_super.c:1658 get_tree_bdev+0x3fe/0x620 fs/super.c:1312 vfs_get_tree+0x88/0x270 fs/super.c:1517 do_new_mount+0x28b/0xae0 fs/namespace.c:2994 do_mount fs/namespace.c:3337 [inline] __do_sys_mount fs/namespace.c:3545 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3522 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317 free_unref_page_list+0x1f7/0x8e0 mm/page_alloc.c:3433 release_pages+0x1bb9/0x1f40 mm/swap.c:963 __pagevec_release+0x80/0xf0 mm/swap.c:983 pagevec_release include/linux/pagevec.h:81 [inline] truncate_inode_pages_range+0x48b/0x1290 mm/truncate.c:329 kill_bdev block/bdev.c:77 [inline] blkdev_flush_mapping+0x182/0x340 block/bdev.c:659 blkdev_put_whole block/bdev.c:690 [inline] blkdev_put+0x4f1/0x790 block/bdev.c:954 deactivate_locked_super+0xa0/0x110 fs/super.c:335 cleanup_mnt+0x44e/0x500 fs/namespace.c:1143 task_work_run+0x129/0x1a0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:175 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x61/0xcb Memory state around the buggy address: ffff88807f51b400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88807f51b480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88807f51b500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807f51b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807f51b600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================