XFS (loop3): Quotacheck needed: Please wait. XFS (loop3): Quotacheck: Done. ================================================================== BUG: KASAN: use-after-free in xfs_dquot_type fs/xfs/xfs_dquot.h:136 [inline] BUG: KASAN: use-after-free in xfs_qm_dqfree_one+0x12f/0x170 fs/xfs/xfs_qm.c:1604 Read of size 1 at addr ffff8880289b0358 by task syz-executor.3/26950 CPU: 0 PID: 26950 Comm: syz-executor.3 Not tainted 6.1.0-rc8-syzkaller-00148-g0d1409e4ff08 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 print_address_description+0x74/0x340 mm/kasan/report.c:284 print_report+0x107/0x1f0 mm/kasan/report.c:395 kasan_report+0xcd/0x100 mm/kasan/report.c:495 xfs_dquot_type fs/xfs/xfs_dquot.h:136 [inline] xfs_qm_dqfree_one+0x12f/0x170 fs/xfs/xfs_qm.c:1604 xfs_qm_shrink_scan+0x351/0x410 fs/xfs/xfs_qm.c:523 do_shrink_slab+0x4e1/0xa00 mm/vmscan.c:842 shrink_slab+0x1e6/0x340 mm/vmscan.c:1002 drop_slab_node mm/vmscan.c:1037 [inline] drop_slab+0x185/0x2c0 mm/vmscan.c:1047 drop_caches_sysctl_handler+0xb1/0x160 fs/drop_caches.c:66 proc_sys_call_handler+0x576/0x890 fs/proc/proc_sysctl.c:604 do_iter_write+0x6c2/0xc20 fs/read_write.c:861 iter_file_splice_write+0x7fc/0xfc0 fs/splice.c:686 do_splice_from fs/splice.c:764 [inline] direct_splice_actor+0xe6/0x1c0 fs/splice.c:931 splice_direct_to_actor+0x4e4/0xc00 fs/splice.c:886 do_splice_direct+0x279/0x3d0 fs/splice.c:974 do_sendfile+0x5fb/0xf80 fs/read_write.c:1255 __do_sys_sendfile64 fs/read_write.c:1317 [inline] __se_sys_sendfile64+0xd0/0x1b0 fs/read_write.c:1309 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+0x63/0xcd RIP: 0033:0x7f6a7188c0d9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6a7261f168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f6a719abf80 RCX: 00007f6a7188c0d9 RDX: 0000000020002080 RSI: 0000000000000004 RDI: 0000000000000005 RBP: 00007f6a718e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000870 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff085b4aef R14: 00007f6a7261f300 R15: 0000000000022000 Allocated by task 26947: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x3d/0x60 mm/kasan/common.c:52 __kasan_slab_alloc+0x65/0x70 mm/kasan/common.c:325 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slab.h:737 [inline] slab_alloc_node mm/slub.c:3398 [inline] slab_alloc mm/slub.c:3406 [inline] __kmem_cache_alloc_lru mm/slub.c:3413 [inline] kmem_cache_alloc+0x1cc/0x300 mm/slub.c:3422 kmem_cache_zalloc include/linux/slab.h:679 [inline] xfs_dquot_alloc+0x36/0x600 fs/xfs/xfs_dquot.c:475 xfs_qm_dqread+0x8a/0x1d0 fs/xfs/xfs_dquot.c:659 xfs_qm_dqget+0x27d/0x4f0 fs/xfs/xfs_dquot.c:870 xfs_qm_vop_dqalloc+0x9bf/0xca0 fs/xfs/xfs_qm.c:1704 xfs_setattr_nonsize+0x3c2/0xfd0 fs/xfs/xfs_iops.c:702 xfs_vn_setattr+0x2f5/0x340 fs/xfs/xfs_iops.c:1022 notify_change+0xe38/0x10f0 fs/attr.c:420 chown_common+0x586/0x8f0 fs/open.c:736 do_fchownat+0x165/0x240 fs/open.c:767 __do_sys_chown fs/open.c:787 [inline] __se_sys_chown fs/open.c:785 [inline] __x64_sys_chown+0x7e/0x90 fs/open.c:785 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+0x63/0xcd Freed by task 3686: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x3d/0x60 mm/kasan/common.c:52 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:511 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1724 [inline] slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1750 slab_free mm/slub.c:3661 [inline] kmem_cache_free+0x94/0x1d0 mm/slub.c:3683 xfs_qm_dqpurge+0x4f7/0x660 fs/xfs/xfs_qm.c:177 xfs_qm_dquot_walk+0x249/0x490 fs/xfs/xfs_qm.c:87 xfs_qm_dqpurge_all fs/xfs/xfs_qm.c:193 [inline] xfs_qm_unmount+0x71/0x100 fs/xfs/xfs_qm.c:205 xfs_unmountfs+0xc5/0x1e0 fs/xfs/xfs_mount.c:1059 xfs_fs_put_super+0x6e/0x2d0 fs/xfs/xfs_super.c:1115 generic_shutdown_super+0x130/0x310 fs/super.c:492 kill_block_super+0x79/0xd0 fs/super.c:1428 deactivate_locked_super+0xa7/0xf0 fs/super.c:332 cleanup_mnt+0x494/0x520 fs/namespace.c:1186 task_work_run+0x243/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x124/0x150 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb2/0x140 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:296 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff8880289b0340 which belongs to the cache xfs_dquot of size 704 The buggy address is located 24 bytes inside of 704-byte region [ffff8880289b0340, ffff8880289b0600) The buggy address belongs to the physical page: page:ffffea0000a26c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x289b0 head:ffffea0000a26c00 order:2 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea00008b7100 dead000000000003 ffff88801ca1e000 raw: 0000000000000000 0000000080130013 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 4151, tgid 4150 (syz-executor.3), ts 190320139287, free_ts 190320102569 prep_new_page mm/page_alloc.c:2539 [inline] get_page_from_freelist+0x742/0x7c0 mm/page_alloc.c:4291 __alloc_pages+0x259/0x560 mm/page_alloc.c:5558 alloc_slab_page+0xbd/0x190 mm/slub.c:1794 allocate_slab+0x5e/0x4b0 mm/slub.c:1939 new_slab mm/slub.c:1992 [inline] ___slab_alloc+0x782/0xe20 mm/slub.c:3180 __slab_alloc mm/slub.c:3279 [inline] slab_alloc_node mm/slub.c:3364 [inline] slab_alloc mm/slub.c:3406 [inline] __kmem_cache_alloc_lru mm/slub.c:3413 [inline] kmem_cache_alloc+0x24c/0x300 mm/slub.c:3422 kmem_cache_zalloc include/linux/slab.h:679 [inline] xfs_dquot_alloc+0x36/0x600 fs/xfs/xfs_dquot.c:475 xfs_qm_dqread+0x8a/0x1d0 fs/xfs/xfs_dquot.c:659 xfs_qm_init_timelimits fs/xfs/xfs_qm.c:593 [inline] xfs_qm_init_quotainfo+0x8e3/0x1000 fs/xfs/xfs_qm.c:666 xfs_qm_mount_quotas+0x98/0x610 fs/xfs/xfs_qm.c:1424 xfs_mountfs+0x1860/0x1ef0 fs/xfs/xfs_mount.c:945 xfs_fs_fill_super+0xf95/0x11f0 fs/xfs/xfs_super.c:1666 get_tree_bdev+0x400/0x620 fs/super.c:1324 vfs_get_tree+0x88/0x270 fs/super.c:1531 do_new_mount+0x289/0xad0 fs/namespace.c:3040 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3568 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1459 [inline] free_pcp_prepare+0x80c/0x8f0 mm/page_alloc.c:1509 free_unref_page_prepare mm/page_alloc.c:3387 [inline] free_unref_page+0x7d/0x5f0 mm/page_alloc.c:3483 __stack_depot_save+0x430/0x4a0 lib/stackdepot.c:506 kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x52/0x60 mm/kasan/common.c:52 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:511 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1724 [inline] slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1750 slab_free mm/slub.c:3661 [inline] kmem_cache_free+0x94/0x1d0 mm/slub.c:3683 __xfs_trans_commit+0x632/0x1060 fs/xfs/xfs_trans.c:1007 xfs_qm_qino_alloc+0x75b/0x960 fs/xfs/xfs_qm.c:816 xfs_qm_init_quotainos+0x77d/0x890 fs/xfs/xfs_qm.c:1556 xfs_qm_init_quotainfo+0x122/0x1000 fs/xfs/xfs_qm.c:635 xfs_qm_mount_quotas+0x98/0x610 fs/xfs/xfs_qm.c:1424 xfs_mountfs+0x1860/0x1ef0 fs/xfs/xfs_mount.c:945 xfs_fs_fill_super+0xf95/0x11f0 fs/xfs/xfs_super.c:1666 get_tree_bdev+0x400/0x620 fs/super.c:1324 Memory state around the buggy address: ffff8880289b0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880289b0280: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff8880289b0300: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb ^ ffff8880289b0380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880289b0400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================