================================================================== BUG: KASAN: slab-use-after-free in F2FS_SB fs/f2fs/f2fs.h:1997 [inline] BUG: KASAN: slab-use-after-free in F2FS_I_SB fs/f2fs/f2fs.h:2002 [inline] BUG: KASAN: slab-use-after-free in F2FS_M_SB fs/f2fs/f2fs.h:2007 [inline] BUG: KASAN: slab-use-after-free in f2fs_release_folio fs/f2fs/data.c:3747 [inline] BUG: KASAN: slab-use-after-free in f2fs_release_folio+0x65e/0x710 fs/f2fs/data.c:3739 Read of size 8 at addr ffff88804c71e678 by task kswapd1/102 CPU: 3 PID: 102 Comm: kswapd1 Not tainted 6.3.0-rc5-syzkaller-00153-gaa318c48808c #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:319 print_report mm/kasan/report.c:430 [inline] kasan_report+0x11c/0x130 mm/kasan/report.c:536 F2FS_SB fs/f2fs/f2fs.h:1997 [inline] F2FS_I_SB fs/f2fs/f2fs.h:2002 [inline] F2FS_M_SB fs/f2fs/f2fs.h:2007 [inline] f2fs_release_folio fs/f2fs/data.c:3747 [inline] f2fs_release_folio+0x65e/0x710 fs/f2fs/data.c:3739 filemap_release_folio+0x13f/0x1b0 mm/filemap.c:4121 shrink_folio_list+0x1fe3/0x3c80 mm/vmscan.c:2010 evict_folios+0x794/0x1940 mm/vmscan.c:5121 try_to_shrink_lruvec+0x82c/0xb90 mm/vmscan.c:5297 shrink_one+0x46b/0x810 mm/vmscan.c:5341 shrink_many mm/vmscan.c:5394 [inline] lru_gen_shrink_node mm/vmscan.c:5511 [inline] shrink_node+0x2064/0x35f0 mm/vmscan.c:6459 kswapd_shrink_node mm/vmscan.c:7262 [inline] balance_pgdat+0xa02/0x1ac0 mm/vmscan.c:7452 kswapd+0x677/0xd60 mm/vmscan.c:7712 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Allocated by task 16229: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] ____kasan_kmalloc mm/kasan/common.c:333 [inline] __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383 kmalloc include/linux/slab.h:580 [inline] kzalloc include/linux/slab.h:720 [inline] alloc_super+0x52/0xb60 fs/super.c:202 sget+0x114/0x580 fs/super.c:664 mount_bdev+0xfc/0x410 fs/super.c:1351 legacy_get_tree+0x109/0x220 fs/fs_context.c:610 vfs_get_tree+0x8d/0x350 fs/super.c:1510 do_new_mount fs/namespace.c:3042 [inline] path_mount+0x1342/0x1e40 fs/namespace.c:3372 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount fs/namespace.c:3571 [inline] __ia32_sys_mount+0x282/0x300 fs/namespace.c:3571 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 Freed by task 1348: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:521 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807 slab_free mm/slub.c:3787 [inline] __kmem_cache_free+0xaf/0x2d0 mm/slub.c:3800 process_one_work+0x991/0x15c0 kernel/workqueue.c:2390 worker_thread+0x669/0x1090 kernel/workqueue.c:2537 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Last potentially related work creation: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:491 insert_work+0x48/0x350 kernel/workqueue.c:1361 __queue_work+0x625/0x1120 kernel/workqueue.c:1524 queue_work_on+0xf2/0x110 kernel/workqueue.c:1552 rcu_do_batch kernel/rcu/tree.c:2112 [inline] rcu_core+0x814/0x1960 kernel/rcu/tree.c:2372 __do_softirq+0x1d4/0x905 kernel/softirq.c:571 Second to last potentially related work creation: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:491 __call_rcu_common.constprop.0+0x99/0x7e0 kernel/rcu/tree.c:2622 __put_super fs/super.c:346 [inline] put_super fs/super.c:310 [inline] deactivate_locked_super+0x142/0x160 fs/super.c:342 deactivate_super+0xb1/0xd0 fs/super.c:362 cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1177 task_work_run+0x16f/0x270 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297 __do_fast_syscall_32+0x72/0xf0 arch/x86/entry/common.c:181 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 The buggy address belongs to the object at ffff88804c71e000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 1656 bytes inside of freed 4096-byte region [ffff88804c71e000, ffff88804c71f000) The buggy address belongs to the physical page: page:ffffea000131c600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4c718 head:ffffea000131c600 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x4fff00000010200(slab|head|node=1|zone=1|lastcpupid=0x7ff) raw: 04fff00000010200 ffff888012443040 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5184, tgid 5184 (syz-executor.3), ts 564240191900, free_ts 564078105913 prep_new_page mm/page_alloc.c:2553 [inline] get_page_from_freelist+0x1190/0x2e20 mm/page_alloc.c:4326 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:5592 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2283 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x25f/0x390 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3193 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292 __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x136/0x320 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:966 [inline] __kmalloc+0x4e/0x190 mm/slab_common.c:980 kmalloc include/linux/slab.h:584 [inline] tomoyo_realpath_from_path+0xc3/0x600 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x22d/0x430 security/tomoyo/file.c:822 security_inode_getattr+0xd3/0x140 security/security.c:1375 vfs_getattr fs/stat.c:167 [inline] vfs_statx+0x16e/0x430 fs/stat.c:242 vfs_fstatat+0x90/0xb0 fs/stat.c:276 vfs_lstat include/linux/fs.h:2871 [inline] __do_compat_sys_ia32_lstat64+0x78/0xd0 arch/x86/kernel/sys_ia32.c:179 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1454 [inline] free_pcp_prepare+0x5d5/0xa50 mm/page_alloc.c:1504 free_unref_page_prepare mm/page_alloc.c:3388 [inline] free_unref_page+0x1d/0x490 mm/page_alloc.c:3483 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2637 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x192/0x220 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:769 [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+0x17c/0x3b0 mm/slub.c:3476 ptlock_alloc+0x21/0x70 mm/memory.c:5821 ptlock_init include/linux/mm.h:2620 [inline] pgtable_pte_page_ctor include/linux/mm.h:2647 [inline] __pte_alloc_one include/asm-generic/pgalloc.h:66 [inline] pte_alloc_one+0x6c/0x230 arch/x86/mm/pgtable.c:33 __pte_alloc+0x6d/0x260 mm/memory.c:421 do_anonymous_page mm/memory.c:4020 [inline] handle_pte_fault mm/memory.c:4907 [inline] __handle_mm_fault+0x3626/0x3e60 mm/memory.c:5051 handle_mm_fault+0x2ba/0x9c0 mm/memory.c:5197 do_user_addr_fault+0x475/0x1230 arch/x86/mm/fault.c:1407 handle_page_fault arch/x86/mm/fault.c:1498 [inline] exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1554 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 Memory state around the buggy address: ffff88804c71e500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88804c71e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88804c71e600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88804c71e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88804c71e700: fb fb fb fb fb fb fb fb 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