RSP: 002b:00007fb9870700c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000130 RAX: ffffffffffffffda RBX: 00007fb9863ac050 RCX: 00007fb98627dea9 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000004 RBP: 00007fb9862ca4a4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fb9863ac050 R15: 00007fff10eddf68 ================================================================== BUG: KASAN: slab-use-after-free in sanity_check_extent_cache+0x38b/0x410 fs/f2fs/extent_cache.c:47 Read of size 4 at addr ffff888064d9a150 by task syz-executor.0/3239 CPU: 1 PID: 3239 Comm: syz-executor.0 Not tainted 6.7.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xf8/0x260 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0x167/0x540 mm/kasan/report.c:475 kasan_report+0x142/0x180 mm/kasan/report.c:588 sanity_check_extent_cache+0x38b/0x410 fs/f2fs/extent_cache.c:47 do_read_inode fs/f2fs/inode.c:513 [inline] f2fs_iget+0x2a79/0x3e40 fs/f2fs/inode.c:564 f2fs_nfs_get_inode+0x60/0xd0 fs/f2fs/super.c:3302 generic_fh_to_dentry+0x71/0xc0 fs/libfs.c:1380 exportfs_decode_fh_raw+0x15a/0x4d0 fs/exportfs/expfs.c:444 exportfs_decode_fh+0x9/0x40 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+0x3b8/0x560 fs/fhandle.c:226 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4d/0xf0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7fb98627dea9 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:00007fb9870700c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000130 RAX: ffffffffffffffda RBX: 00007fb9863ac050 RCX: 00007fb98627dea9 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000004 RBP: 00007fb9862ca4a4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fb9863ac050 R15: 00007fff10eddf68 Allocated by task 3234: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x80 mm/kasan/common.c:52 __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x67/0x3c0 mm/slab.h:763 slab_alloc_node mm/slub.c:3478 [inline] slab_alloc mm/slub.c:3486 [inline] __kmem_cache_alloc_lru mm/slub.c:3493 [inline] kmem_cache_alloc+0x1a0/0x2f0 mm/slub.c:3502 f2fs_kmem_cache_alloc_nofail fs/f2fs/f2fs.h:2801 [inline] f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2811 [inline] __grab_extent_tree+0x1b9/0x3a0 fs/f2fs/extent_cache.c:335 f2fs_init_read_extent_tree+0x3ab/0x830 fs/f2fs/extent_cache.c:406 do_read_inode fs/f2fs/inode.c:510 [inline] f2fs_iget+0x2a69/0x3e40 fs/f2fs/inode.c:564 f2fs_nfs_get_inode+0x60/0xd0 fs/f2fs/super.c:3302 generic_fh_to_dentry+0x71/0xc0 fs/libfs.c:1380 exportfs_decode_fh_raw+0x15a/0x4d0 fs/exportfs/expfs.c:444 exportfs_decode_fh+0x9/0x40 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+0x3b8/0x560 fs/fhandle.c:226 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4d/0xf0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x6f/0x77 Freed by task 3234: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x80 mm/kasan/common.c:52 kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522 ____kasan_slab_free+0x122/0x1f0 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1800 [inline] slab_free_freelist_hook mm/slub.c:1826 [inline] slab_free mm/slub.c:3809 [inline] kmem_cache_free+0x2f0/0x520 mm/slub.c:3831 __destroy_extent_tree+0x3dc/0x5c0 fs/f2fs/extent_cache.c:1135 f2fs_destroy_extent_tree+0xf/0x20 fs/f2fs/extent_cache.c:1146 f2fs_evict_inode+0x346/0x1180 fs/f2fs/inode.c:835 evict+0x264/0x650 fs/inode.c:664 f2fs_iget+0x1dda/0x3e40 fs/f2fs/inode.c:625 f2fs_nfs_get_inode+0x60/0xd0 fs/f2fs/super.c:3302 generic_fh_to_dentry+0x71/0xc0 fs/libfs.c:1380 exportfs_decode_fh_raw+0x15a/0x4d0 fs/exportfs/expfs.c:444 exportfs_decode_fh+0x9/0x40 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+0x3b8/0x560 fs/fhandle.c:226 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4d/0xf0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x6f/0x77 The buggy address belongs to the object at ffff888064d9a0d0 which belongs to the cache f2fs_extent_tree of size 144 The buggy address is located 128 bytes inside of freed 144-byte region [ffff888064d9a0d0, ffff888064d9a160) The buggy address belongs to the physical page: page:ffffea0001936680 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x64d9a flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000800 ffff88801129cb40 dead000000000122 0000000000000000 raw: 0000000000000000 0000000080130013 00000001ffffffff 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 0x112c50(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 3232, tgid 3225 (syz-executor.0), ts 58847196892, free_ts 6660670484 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x10f/0x130 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1544 [inline] get_page_from_freelist+0x345c/0x3600 mm/page_alloc.c:3312 __alloc_pages+0x255/0x650 mm/page_alloc.c:4568 alloc_pages_mpol+0x27f/0x4d0 mm/mempolicy.c:2133 alloc_slab_page+0x6a/0x170 mm/slub.c:1870 allocate_slab mm/slub.c:2017 [inline] new_slab+0x70/0x270 mm/slub.c:2070 ___slab_alloc+0x94b/0xee0 mm/slub.c:3223 __slab_alloc mm/slub.c:3322 [inline] __slab_alloc_node mm/slub.c:3375 [inline] slab_alloc_node mm/slub.c:3468 [inline] slab_alloc mm/slub.c:3486 [inline] __kmem_cache_alloc_lru mm/slub.c:3493 [inline] kmem_cache_alloc+0x1e5/0x2f0 mm/slub.c:3502 f2fs_kmem_cache_alloc_nofail fs/f2fs/f2fs.h:2801 [inline] f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2811 [inline] __grab_extent_tree+0x1b9/0x3a0 fs/f2fs/extent_cache.c:335 f2fs_init_read_extent_tree+0x3ab/0x830 fs/f2fs/extent_cache.c:406 do_read_inode fs/f2fs/inode.c:510 [inline] f2fs_iget+0x2a69/0x3e40 fs/f2fs/inode.c:564 f2fs_nfs_get_inode+0x60/0xd0 fs/f2fs/super.c:3302 generic_fh_to_dentry+0x71/0xc0 fs/libfs.c:1380 exportfs_decode_fh_raw+0x15a/0x4d0 fs/exportfs/expfs.c:444 exportfs_decode_fh+0x9/0x40 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+0x3b8/0x560 fs/fhandle.c:226 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1137 [inline] free_unref_page_prepare+0x7fd/0x910 mm/page_alloc.c:2347 free_unref_page+0x37/0x3a0 mm/page_alloc.c:2487 free_contig_range+0x91/0x140 mm/page_alloc.c:6536 destroy_args+0x72/0x6e0 mm/debug_vm_pgtable.c:1028 debug_vm_pgtable+0x3c2/0x5e0 mm/debug_vm_pgtable.c:1408 do_one_initcall+0x196/0x4d0 init/main.c:1236 do_initcall_level+0x11e/0x1e0 init/main.c:1298 do_initcalls+0x3e/0x70 init/main.c:1314 kernel_init_freeable+0x35f/0x4c0 init/main.c:1551 kernel_init+0x18/0x1a0 init/main.c:1441 ret_from_fork+0x32/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242 Memory state around the buggy address: ffff888064d9a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888064d9a080: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb >ffff888064d9a100: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ^ ffff888064d9a180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888064d9a200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================