================================================================== BUG: KASAN: use-after-free in iomap_finish_ioend+0x898/0x960 fs/iomap/buffered-io.c:1319 Read of size 8 at addr ffff88805ecb47d0 by task kworker/1:4/3590 CPU: 1 PID: 3590 Comm: kworker/1:4 Not tainted 6.1.97-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Workqueue: xfs-conv/loop3 xfs_end_io Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15f/0x4f0 mm/kasan/report.c:395 kasan_report+0x136/0x160 mm/kasan/report.c:495 iomap_finish_ioend+0x898/0x960 fs/iomap/buffered-io.c:1319 iomap_finish_ioends+0x1ab/0x390 fs/iomap/buffered-io.c:1343 xfs_end_ioend+0x36e/0x4d0 fs/xfs/xfs_aops.c:134 xfs_end_io+0x2e1/0x370 fs/xfs/xfs_aops.c:171 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Allocated by task 10825: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 __kasan_slab_alloc+0x65/0x70 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737 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_lru+0x10c/0x2d0 mm/slub.c:3429 alloc_inode_sb include/linux/fs.h:3193 [inline] xfs_inode_alloc+0x84/0x6c0 fs/xfs/xfs_icache.c:81 xfs_iget_cache_miss fs/xfs/xfs_icache.c:590 [inline] xfs_iget+0xbe5/0x3360 fs/xfs/xfs_icache.c:756 xfs_lookup+0x2b2/0x4e0 fs/xfs/xfs_inode.c:669 xfs_vn_lookup+0x18e/0x290 fs/xfs/xfs_iops.c:304 lookup_open fs/namei.c:3462 [inline] open_last_lookups fs/namei.c:3552 [inline] path_openat+0x10fb/0x2e60 fs/namei.c:3782 do_filp_open+0x230/0x480 fs/namei.c:3812 do_sys_openat2+0x13b/0x500 fs/open.c:1318 do_sys_open fs/open.c:1334 [inline] __do_sys_openat fs/open.c:1350 [inline] __se_sys_openat fs/open.c:1345 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1345 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Freed by task 3966: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516 ____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 mm/slub.c:1750 [inline] slab_free mm/slub.c:3661 [inline] kmem_cache_free+0x292/0x510 mm/slub.c:3683 rcu_do_batch kernel/rcu/tree.c:2296 [inline] rcu_core+0xad5/0x1810 kernel/rcu/tree.c:2556 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:571 __do_softirq kernel/softirq.c:605 [inline] invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x157/0x240 kernel/softirq.c:654 irq_exit_rcu+0x5/0x20 kernel/softirq.c:666 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653 Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:486 call_rcu+0x163/0xa10 kernel/rcu/tree.c:2844 __xfs_inode_free fs/xfs/xfs_icache.c:161 [inline] xfs_reclaim_inode fs/xfs/xfs_icache.c:958 [inline] xfs_icwalk_process_inode fs/xfs/xfs_icache.c:1640 [inline] xfs_icwalk_ag+0x13c4/0x1b70 fs/xfs/xfs_icache.c:1722 xfs_icwalk fs/xfs/xfs_icache.c:1771 [inline] xfs_reclaim_inodes+0x1f3/0x300 fs/xfs/xfs_icache.c:991 xfs_unmount_flush_inodes+0xaf/0xc0 fs/xfs/xfs_mount.c:594 xfs_unmountfs+0xc0/0x280 fs/xfs/xfs_mount.c:1071 xfs_fs_put_super+0x6c/0x2c0 fs/xfs/xfs_super.c:1118 generic_shutdown_super+0x130/0x340 fs/super.c:501 kill_block_super+0x7a/0xe0 fs/super.c:1459 deactivate_locked_super+0xa0/0x110 fs/super.c:332 cleanup_mnt+0x490/0x520 fs/namespace.c:1186 task_work_run+0x246/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:177 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Second to last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:486 insert_work+0x54/0x3d0 kernel/workqueue.c:1361 __queue_work+0xb4b/0xf90 kernel/workqueue.c:1520 queue_work_on+0x14b/0x250 kernel/workqueue.c:1548 queue_work include/linux/workqueue.h:512 [inline] xfs_end_bio+0xf2/0x1d0 fs/xfs/xfs_aops.c:186 iomap_submit_ioend fs/iomap/buffered-io.c:1458 [inline] iomap_writepages+0x1e3/0x240 fs/iomap/buffered-io.c:1790 xfs_vm_writepages+0x135/0x190 fs/xfs/xfs_aops.c:503 do_writepages+0x3a2/0x670 mm/page-writeback.c:2469 filemap_fdatawrite_wbc+0x121/0x180 mm/filemap.c:388 __filemap_fdatawrite_range mm/filemap.c:421 [inline] file_write_and_wait_range+0x1ca/0x2b0 mm/filemap.c:774 xfs_file_fsync+0x1e5/0xae0 fs/xfs/xfs_file.c:151 generic_write_sync include/linux/fs.h:2957 [inline] xfs_file_buffered_write+0xaa6/0xbe0 fs/xfs/xfs_file.c:764 call_write_iter include/linux/fs.h:2265 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x7ae/0xba0 fs/read_write.c:584 ksys_write+0x19c/0x2c0 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff88805ecb45c0 which belongs to the cache xfs_inode of size 1808 The buggy address is located 528 bytes inside of 1808-byte region [ffff88805ecb45c0, ffff88805ecb4cd0) The buggy address belongs to the physical page: page:ffffea00017b2c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88805ecb7440 pfn:0x5ecb0 head:ffffea00017b2c00 order:3 compound_mapcount:0 compound_pincount:0 memcg:ffff88806138a701 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000122 ffff888016b8ba00 raw: ffff88805ecb7440 0000000080100009 00000001ffffffff ffff88806138a701 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 4147, tgid 4144 (syz.4.152), ts 89950319487, free_ts 85876922518 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2517 prep_new_page mm/page_alloc.c:2524 [inline] get_page_from_freelist+0x322e/0x33b0 mm/page_alloc.c:4283 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5551 alloc_slab_page+0x6a/0x150 mm/slub.c:1794 allocate_slab mm/slub.c:1939 [inline] new_slab+0x84/0x2d0 mm/slub.c:1992 ___slab_alloc+0xc20/0x1270 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_lru+0x1a5/0x2d0 mm/slub.c:3429 alloc_inode_sb include/linux/fs.h:3193 [inline] xfs_inode_alloc+0x84/0x6c0 fs/xfs/xfs_icache.c:81 xfs_iget_cache_miss fs/xfs/xfs_icache.c:590 [inline] xfs_iget+0xbe5/0x3360 fs/xfs/xfs_icache.c:756 xfs_mountfs+0xf57/0x1f00 fs/xfs/xfs_mount.c:848 xfs_fs_fill_super+0x1145/0x13a0 fs/xfs/xfs_super.c:1681 get_tree_bdev+0x3fe/0x620 fs/super.c:1355 vfs_get_tree+0x88/0x270 fs/super.c:1562 do_new_mount+0x2ba/0xb40 fs/namespace.c:3051 do_mount fs/namespace.c:3394 [inline] __do_sys_mount fs/namespace.c:3602 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3579 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1444 [inline] free_pcp_prepare mm/page_alloc.c:1494 [inline] free_unref_page_prepare+0xf63/0x1120 mm/page_alloc.c:3362 free_unref_page+0x33/0x3e0 mm/page_alloc.c:3457 free_slab mm/slub.c:2031 [inline] discard_slab mm/slub.c:2037 [inline] __unfreeze_partials+0x1b7/0x210 mm/slub.c:2586 put_cpu_partial+0x17b/0x250 mm/slub.c:2662 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x156/0x170 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737 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+0x10c/0x2d0 mm/slub.c:3422 mt_alloc_one lib/maple_tree.c:152 [inline] mas_alloc_nodes+0x276/0x800 lib/maple_tree.c:1277 mas_node_count_gfp lib/maple_tree.c:1359 [inline] mas_preallocate+0x12d/0x350 lib/maple_tree.c:5804 do_mas_align_munmap+0x2c4/0x15f0 mm/mmap.c:2443 do_mas_munmap+0x246/0x2b0 mm/mmap.c:2640 mmap_region+0x8e6/0x1fa0 mm/mmap.c:2688 do_mmap+0x8c5/0xf60 mm/mmap.c:1425 vm_mmap_pgoff+0x1ca/0x2d0 mm/util.c:520 Memory state around the buggy address: ffff88805ecb4680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805ecb4700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88805ecb4780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88805ecb4800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805ecb4880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================