RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000004 RBP: 00007f5e18aca4a4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f5e18bac050 R15: 00007ffde60898d8 ================================================================== BUG: KASAN: slab-use-after-free in sanity_check_extent_cache+0x370/0x410 fs/f2fs/extent_cache.c:46 Read of size 4 at addr ffff8880763472f0 by task syz-executor.0/5621 CPU: 1 PID: 5621 Comm: syz-executor.0 Not tainted 6.10.0-rc1-syzkaller-00013-g2bfcfd584ff5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 sanity_check_extent_cache+0x370/0x410 fs/f2fs/extent_cache.c:46 do_read_inode fs/f2fs/inode.c:515 [inline] f2fs_iget+0x34ee/0x4840 fs/f2fs/inode.c:566 f2fs_nfs_get_inode+0x74/0x100 fs/f2fs/super.c:3265 generic_fh_to_dentry+0x9f/0xf0 fs/libfs.c:1456 exportfs_decode_fh_raw+0x152/0x5f0 fs/exportfs/expfs.c:444 exportfs_decode_fh+0x3c/0x80 fs/exportfs/expfs.c:584 do_handle_to_path fs/fhandle.c:155 [inline] handle_to_path fs/fhandle.c:210 [inline] do_handle_open+0x495/0x650 fs/fhandle.c:226 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5e18a7dea9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5e197980c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000130 RAX: ffffffffffffffda RBX: 00007f5e18bac050 RCX: 00007f5e18a7dea9 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000004 RBP: 00007f5e18aca4a4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f5e18bac050 R15: 00007ffde60898d8 Allocated by task 5597: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3940 [inline] slab_alloc_node mm/slub.c:4000 [inline] kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4007 f2fs_kmem_cache_alloc_nofail fs/f2fs/f2fs.h:2815 [inline] f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2825 [inline] __grab_extent_tree+0x183/0x400 fs/f2fs/extent_cache.c:334 f2fs_init_read_extent_tree+0x455/0x910 fs/f2fs/extent_cache.c:405 do_read_inode fs/f2fs/inode.c:512 [inline] f2fs_iget+0x34de/0x4840 fs/f2fs/inode.c:566 f2fs_nfs_get_inode+0x74/0x100 fs/f2fs/super.c:3265 generic_fh_to_dentry+0x9f/0xf0 fs/libfs.c:1456 exportfs_decode_fh_raw+0x152/0x5f0 fs/exportfs/expfs.c:444 exportfs_decode_fh+0x3c/0x80 fs/exportfs/expfs.c:584 do_handle_to_path fs/fhandle.c:155 [inline] handle_to_path fs/fhandle.c:210 [inline] do_handle_open+0x495/0x650 fs/fhandle.c:226 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5597: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2195 [inline] slab_free mm/slub.c:4436 [inline] kmem_cache_free+0x145/0x350 mm/slub.c:4511 __destroy_extent_tree+0x307/0x600 fs/f2fs/extent_cache.c:1132 f2fs_destroy_extent_tree+0x17/0x30 fs/f2fs/extent_cache.c:1143 f2fs_evict_inode+0x44d/0x1510 fs/f2fs/inode.c:837 evict+0x2a8/0x630 fs/inode.c:667 f2fs_iget+0x1a93/0x4840 fs/f2fs/inode.c:627 f2fs_nfs_get_inode+0x74/0x100 fs/f2fs/super.c:3265 generic_fh_to_dentry+0x9f/0xf0 fs/libfs.c:1456 exportfs_decode_fh_raw+0x152/0x5f0 fs/exportfs/expfs.c:444 exportfs_decode_fh+0x3c/0x80 fs/exportfs/expfs.c:584 do_handle_to_path fs/fhandle.c:155 [inline] handle_to_path fs/fhandle.c:210 [inline] do_handle_open+0x495/0x650 fs/fhandle.c:226 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888076347270 which belongs to the cache f2fs_extent_tree of size 144 The buggy address is located 128 bytes inside of freed 144-byte region [ffff888076347270, ffff888076347300) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x76347 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffefff(slab) raw: 00fff00000000000 ffff88801afc78c0 dead000000000122 0000000000000000 raw: 0000000000000000 0000000080130013 00000001ffffefff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Reclaimable, gfp_mask 0x152c50(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 5528, tgid 5496 (syz-executor.0), ts 88272940030, free_ts 15843153959 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1468 prep_new_page mm/page_alloc.c:1476 [inline] get_page_from_freelist+0x2e2d/0x2ee0 mm/page_alloc.c:3402 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4660 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2264 allocate_slab+0x5a/0x2e0 mm/slub.c:2427 new_slab mm/slub.c:2480 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3666 __slab_alloc+0x58/0xa0 mm/slub.c:3756 __slab_alloc_node mm/slub.c:3809 [inline] slab_alloc_node mm/slub.c:3988 [inline] kmem_cache_alloc_noprof+0x1c1/0x2a0 mm/slub.c:4007 f2fs_kmem_cache_alloc_nofail fs/f2fs/f2fs.h:2815 [inline] f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2825 [inline] __grab_extent_tree+0x183/0x400 fs/f2fs/extent_cache.c:334 f2fs_init_read_extent_tree+0x455/0x910 fs/f2fs/extent_cache.c:405 do_read_inode fs/f2fs/inode.c:512 [inline] f2fs_iget+0x34de/0x4840 fs/f2fs/inode.c:566 f2fs_nfs_get_inode+0x74/0x100 fs/f2fs/super.c:3265 generic_fh_to_dentry+0x9f/0xf0 fs/libfs.c:1456 exportfs_decode_fh_raw+0x152/0x5f0 fs/exportfs/expfs.c:444 exportfs_decode_fh+0x3c/0x80 fs/exportfs/expfs.c:584 do_handle_to_path fs/fhandle.c:155 [inline] handle_to_path fs/fhandle.c:210 [inline] do_handle_open+0x495/0x650 fs/fhandle.c:226 page last free pid 1 tgid 1 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1088 [inline] free_unref_page+0xd19/0xea0 mm/page_alloc.c:2565 free_contig_range+0x9e/0x160 mm/page_alloc.c:6619 destroy_args+0x8a/0x890 mm/debug_vm_pgtable.c:1038 debug_vm_pgtable+0x4be/0x550 mm/debug_vm_pgtable.c:1418 do_one_initcall+0x248/0x880 init/main.c:1267 do_initcall_level+0x157/0x210 init/main.c:1329 do_initcalls+0x3f/0x80 init/main.c:1345 kernel_init_freeable+0x435/0x5d0 init/main.c:1578 kernel_init+0x1d/0x2b0 init/main.c:1467 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Memory state around the buggy address: ffff888076347180: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb ffff888076347200: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb >ffff888076347280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888076347300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888076347380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc 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