================================================================== BUG: KASAN: use-after-free in __xfs_iflags_test fs/xfs/xfs_inode.h:146 [inline] BUG: KASAN: use-after-free in xfs_iflush_cluster+0x10d/0x12e0 fs/xfs/xfs_inode.c:3660 Read of size 8 at addr ffff88805ef826e8 by task xfsaild/loop1/23454 CPU: 0 PID: 23454 Comm: xfsaild/loop1 Not tainted 5.15.188-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106 print_address_description+0x60/0x2d0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0xdf/0x130 mm/kasan/report.c:451 __xfs_iflags_test fs/xfs/xfs_inode.h:146 [inline] xfs_iflush_cluster+0x10d/0x12e0 fs/xfs/xfs_inode.c:3660 xfs_inode_item_push+0x1cd/0x2c0 fs/xfs/xfs_inode_item.c:567 xfsaild_push_item fs/xfs/xfs_trans_ail.c:414 [inline] xfsaild_push fs/xfs/xfs_trans_ail.c:472 [inline] xfsaild+0xce7/0x2780 fs/xfs/xfs_trans_ail.c:657 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Allocated by task 11138: 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+0x9c/0xd0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0x100/0x290 mm/slub.c:3233 xfs_inode_alloc+0x4e/0x560 fs/xfs/xfs_icache.c:80 xfs_iget_cache_miss fs/xfs/xfs_icache.c:601 [inline] xfs_iget+0xac1/0x2e60 fs/xfs/xfs_icache.c:767 xfs_qm_dqusage_adjust+0x19f/0x4a0 fs/xfs/xfs_qm.c:1157 xfs_iwalk_ag_recs+0x51a/0x870 fs/xfs/xfs_iwalk.c:220 xfs_iwalk_run_callbacks+0x223/0x450 fs/xfs/xfs_iwalk.c:376 xfs_iwalk_ag+0x90b/0x9e0 fs/xfs/xfs_iwalk.c:482 xfs_iwalk_ag_work+0xf1/0x1a0 fs/xfs/xfs_iwalk.c:624 xfs_pwork_work+0x77/0x180 fs/xfs/xfs_pwork.c:47 process_one_work+0x863/0x1000 kernel/workqueue.c:2310 worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Freed by task 20: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:46 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360 ____kasan_slab_free+0xd5/0x110 mm/kasan/common.c:366 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1705 [inline] slab_free_freelist_hook+0xea/0x170 mm/slub.c:1731 slab_free mm/slub.c:3499 [inline] kmem_cache_free+0x8f/0x210 mm/slub.c:3515 rcu_do_batch kernel/rcu/tree.c:2523 [inline] rcu_core+0x962/0x15d0 kernel/rcu/tree.c:2763 handle_softirqs+0x328/0x820 kernel/softirq.c:576 run_ksoftirqd+0x98/0xf0 kernel/softirq.c:943 smpboot_thread_fn+0x4f6/0x970 kernel/smpboot.c:164 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Last potentially related work creation: kasan_save_stack+0x35/0x60 mm/kasan/common.c:38 kasan_record_aux_stack+0xb8/0x100 mm/kasan/generic.c:348 __call_rcu kernel/rcu/tree.c:3011 [inline] call_rcu+0x182/0x930 kernel/rcu/tree.c:3091 __xfs_inode_free fs/xfs/xfs_icache.c:158 [inline] xfs_reclaim_inode fs/xfs/xfs_icache.c:960 [inline] xfs_icwalk_process_inode fs/xfs/xfs_icache.c:1642 [inline] xfs_icwalk_ag+0x12d0/0x19a0 fs/xfs/xfs_icache.c:1724 xfs_icwalk fs/xfs/xfs_icache.c:1773 [inline] xfs_reclaim_inodes+0x188/0x260 fs/xfs/xfs_icache.c:993 xfs_unmount_flush_inodes fs/xfs/xfs_mount.c:554 [inline] xfs_unmountfs+0x14f/0x250 fs/xfs/xfs_mount.c:1016 xfs_fs_put_super+0x66/0x2b0 fs/xfs/xfs_super.c:1095 generic_shutdown_super+0x130/0x300 fs/super.c:475 kill_block_super+0x7c/0xe0 fs/super.c:1427 deactivate_locked_super+0x93/0xf0 fs/super.c:335 cleanup_mnt+0x418/0x4d0 fs/namespace.c:1139 task_work_run+0x125/0x1a0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 The buggy address belongs to the object at ffff88805ef82580 which belongs to the cache xfs_inode of size 1752 The buggy address is located 360 bytes inside of 1752-byte region [ffff88805ef82580, ffff88805ef82c58) The buggy address belongs to the page: page:ffffea00017be000 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88805ef80780 pfn:0x5ef80 head:ffffea00017be000 order:3 compound_mapcount:0 compound_pincount:0 memcg:ffff888059d60901 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000122 ffff88814660d8c0 raw: ffff88805ef80780 0000000080110010 00000001ffffffff ffff888059d60901 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 7733, ts 276863521910, free_ts 11045621100 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x1b77/0x1c60 mm/page_alloc.c:4192 __alloc_pages+0x1e1/0x470 mm/page_alloc.c:5474 alloc_slab_page mm/slub.c:1775 [inline] allocate_slab mm/slub.c:1912 [inline] new_slab+0xc0/0x4b0 mm/slub.c:1975 ___slab_alloc+0x81e/0xdf0 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+0x195/0x290 mm/slub.c:3233 xfs_inode_alloc+0x4e/0x560 fs/xfs/xfs_icache.c:80 xfs_iget_cache_miss fs/xfs/xfs_icache.c:601 [inline] xfs_iget+0xac1/0x2e60 fs/xfs/xfs_icache.c:767 xfs_rtmount_inodes+0x4e/0x160 fs/xfs/xfs_rtalloc.c:1299 xfs_mountfs+0xd85/0x1b10 fs/xfs/xfs_mount.c:823 xfs_fs_fill_super+0x11a4/0x13f0 fs/xfs/xfs_super.c:1675 get_tree_bdev+0x3f1/0x610 fs/super.c:1325 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x24a/0xa40 fs/namespace.c:3014 do_mount fs/namespace.c:3357 [inline] __do_sys_mount fs/namespace.c:3565 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3542 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 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+0x637/0x6c0 mm/page_alloc.c:3317 free_unref_page+0x94/0x280 mm/page_alloc.c:3396 free_contig_range+0x96/0xf0 mm/page_alloc.c:9393 destroy_args+0xef/0x8b0 mm/debug_vm_pgtable.c:1018 debug_vm_pgtable+0x318/0x370 mm/debug_vm_pgtable.c:1331 do_one_initcall+0x1ee/0x680 init/main.c:1302 do_initcall_level+0x137/0x1f0 init/main.c:1375 do_initcalls+0x4b/0x90 init/main.c:1391 kernel_init_freeable+0x3ce/0x560 init/main.c:1615 kernel_init+0x19/0x1b0 init/main.c:1506 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Memory state around the buggy address: ffff88805ef82580: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805ef82600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88805ef82680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88805ef82700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805ef82780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================