XFS (loop1): 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 ffff88805a01c018 by task syz-executor.1/2051 CPU: 1 PID: 2051 Comm: syz-executor.1 Not tainted 6.1.0-syzkaller-03225-g764822972d64 #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: 0033:0x7f025688c0d9 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:00007f02575ed168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f02569abf80 RCX: 00007f025688c0d9 RDX: 0000000020002080 RSI: 0000000000000004 RDI: 0000000000000006 RBP: 00007f02568e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000870 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffda395cb0f R14: 00007f02575ed300 R15: 0000000000022000 Allocated by task 2048: 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:761 [inline] slab_alloc_node mm/slub.c:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x1b3/0x350 mm/slub.c:3476 kmem_cache_zalloc include/linux/slab.h:710 [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+0x499/0x1000 fs/xfs/xfs_iops.c:703 xfs_vn_setattr+0x2c7/0x310 fs/xfs/xfs_iops.c:1024 notify_change+0xe50/0x1100 fs/attr.c:482 chown_common+0x5b6/0x910 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 3678: 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:518 ____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:1781 [inline] slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1807 slab_free mm/slub.c:3787 [inline] kmem_cache_free+0x94/0x1d0 mm/slub.c:3809 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:1386 deactivate_locked_super+0xa7/0xf0 fs/super.c:332 cleanup_mnt+0x494/0x520 fs/namespace.c:1291 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 ffff88805a01c000 which belongs to the cache xfs_dquot of size 704 The buggy address is located 24 bytes inside of 704-byte region [ffff88805a01c000, ffff88805a01c2c0) The buggy address belongs to the physical page: page:ffffea0001680700 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5a01c head:ffffea0001680700 order:2 compound_mapcount:0 compound_pincount:0 ksm flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff888019e4b8c0 ffffea0001d9cb00 0000000000000003 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 102, tgid 102 (kworker/u4:4), ts 1318609898995, free_ts 1310577619330 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:1851 allocate_slab+0x5e/0x3c0 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0x782/0xe20 mm/slub.c:3193 __slab_alloc mm/slub.c:3292 [inline] __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x268/0x350 mm/slub.c:3476 kmem_cache_zalloc include/linux/slab.h:710 [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_quotacheck_dqadjust+0xb7/0x380 fs/xfs/xfs_qm.c:1077 xfs_qm_dqusage_adjust+0x4bd/0x630 fs/xfs/xfs_qm.c:1189 xfs_iwalk_ag_recs+0x425/0x620 fs/xfs/xfs_iwalk.c:220 xfs_iwalk_run_callbacks+0x20f/0x410 fs/xfs/xfs_iwalk.c:376 xfs_iwalk_ag+0xaa5/0xb80 fs/xfs/xfs_iwalk.c:482 xfs_iwalk_ag_work+0xf5/0x1a0 fs/xfs/xfs_iwalk.c:624 xfs_pwork_work+0x7f/0x180 fs/xfs/xfs_pwork.c:47 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 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x156/0x170 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:302 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slab.h:761 [inline] slab_alloc_node mm/slub.c:3452 [inline] __kmem_cache_alloc_node+0x1e0/0x340 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc+0x9e/0x190 mm/slab_common.c:981 kmalloc include/linux/slab.h:584 [inline] kzalloc include/linux/slab.h:720 [inline] tomoyo_encode2 security/tomoyo/realpath.c:45 [inline] tomoyo_encode+0x26f/0x540 security/tomoyo/realpath.c:80 tomoyo_path_perm+0x344/0x670 security/tomoyo/file.c:831 tomoyo_path_symlink+0xda/0x110 security/tomoyo/tomoyo.c:199 security_path_symlink+0xd6/0x160 security/security.c:1184 do_symlinkat+0x11b/0x5f0 fs/namei.c:4425 __do_sys_symlinkat fs/namei.c:4447 [inline] __se_sys_symlinkat fs/namei.c:4444 [inline] __x64_sys_symlinkat+0x95/0xa0 fs/namei.c:4444 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 Memory state around the buggy address: ffff88805a01bf00: 00 fc fc 00 00 00 00 00 fc fc 00 00 00 00 00 fc ffff88805a01bf80: fc 00 00 00 00 00 fc fc 00 00 00 00 00 fc fc fc >ffff88805a01c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88805a01c080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805a01c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================