REISERFS (device loop0): journal params: device loop0, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop0): checking transaction log (loop0) REISERFS (device loop0): Using tea hash to sort names REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. ================================================================== BUG: KASAN: slab-out-of-bounds in leaf_paste_entries+0xe78/0x1110 fs/reiserfs/lbalance.c:1351 Read of size 2 at addr ffff88805e8b3f08 by task syz.0.17/5952 CPU: 0 PID: 5952 Comm: syz.0.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xac/0x220 mm/kasan/report.c:468 kasan_report+0x117/0x150 mm/kasan/report.c:581 leaf_paste_entries+0xe78/0x1110 fs/reiserfs/lbalance.c:1351 leaf_copy_dir_entries+0x699/0x990 fs/reiserfs/lbalance.c:119 leaf_copy_boundary_item+0xb90/0x2180 fs/reiserfs/lbalance.c:168 leaf_copy_items fs/reiserfs/lbalance.c:551 [inline] leaf_move_items+0x8b5/0xe90 fs/reiserfs/lbalance.c:726 leaf_shift_left+0xbd/0x450 fs/reiserfs/lbalance.c:750 balance_leaf_when_delete_left fs/reiserfs/do_balan.c:194 [inline] balance_leaf_when_delete fs/reiserfs/do_balan.c:272 [inline] balance_leaf+0x1dc1/0x10da0 fs/reiserfs/do_balan.c:1393 do_balance+0x2fe/0x940 fs/reiserfs/do_balan.c:1888 reiserfs_cut_from_item+0x13b2/0x1f10 fs/reiserfs/stree.c:1836 reiserfs_do_truncate+0xa3d/0x1340 fs/reiserfs/stree.c:1971 reiserfs_truncate_file+0x37a/0x7c0 fs/reiserfs/inode.c:2306 reiserfs_setattr+0xc0c/0x11a0 fs/reiserfs/inode.c:3392 notify_change+0xb0d/0xe10 fs/attr.c:499 do_truncate+0x19b/0x220 fs/open.c:66 handle_truncate fs/namei.c:3299 [inline] do_open fs/namei.c:3644 [inline] path_openat+0x298c/0x3190 fs/namei.c:3797 do_filp_open+0x1c5/0x3d0 fs/namei.c:3824 do_sys_openat2+0x12c/0x1c0 fs/open.c:1419 do_sys_open fs/open.c:1434 [inline] __do_sys_openat fs/open.c:1450 [inline] __se_sys_openat fs/open.c:1445 [inline] __x64_sys_openat+0x139/0x160 fs/open.c:1445 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fb409b8f6c9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc27ee8ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fb409de5fa0 RCX: 00007fb409b8f6c9 RDX: 000000000000275a RSI: 0000200000000000 RDI: ffffffffffffff9c RBP: 00007fb409c11f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb409de5fa0 R14: 00007fb409de5fa0 R15: 0000000000000004 Allocated by task 5928: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4e/0x70 mm/kasan/common.c:52 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x6e/0x4d0 mm/slab.h:767 slab_alloc_node mm/slub.c:3495 [inline] slab_alloc mm/slub.c:3503 [inline] __kmem_cache_alloc_lru mm/slub.c:3510 [inline] kmem_cache_alloc_lru+0x115/0x2e0 mm/slub.c:3526 alloc_inode_sb include/linux/fs.h:2946 [inline] alloc_inode fs/inode.c:263 [inline] new_inode_pseudo+0x82/0x1d0 fs/inode.c:1049 get_pipe_inode fs/pipe.c:879 [inline] create_pipe_files+0x51/0x700 fs/pipe.c:919 __do_pipe_flags+0x4c/0x2c0 fs/pipe.c:968 do_pipe2+0x9d/0x170 fs/pipe.c:1019 __do_sys_pipe2 fs/pipe.c:1037 [inline] __se_sys_pipe2 fs/pipe.c:1035 [inline] __x64_sys_pipe2+0x5a/0x70 fs/pipe.c:1035 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Freed by task 5928: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4e/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x2e/0x50 mm/kasan/generic.c:522 ____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1811 [inline] slab_free_freelist_hook+0x130/0x1b0 mm/slub.c:1837 slab_free mm/slub.c:3830 [inline] kmem_cache_free+0xf8/0x280 mm/slub.c:3852 destroy_inode fs/inode.c:311 [inline] evict+0x756/0x870 fs/inode.c:720 __dentry_kill+0x431/0x650 fs/dcache.c:611 dentry_kill+0xb8/0x290 fs/dcache.c:-1 dput+0xfe/0x1e0 fs/dcache.c:918 __fput+0x5e5/0x970 fs/file_table.c:392 __do_sys_close fs/open.c:1571 [inline] __se_sys_close+0x15f/0x220 fs/open.c:1556 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff88805e8b37b0 which belongs to the cache inode_cache of size 1168 The buggy address is located 712 bytes to the right of allocated 1168-byte region [ffff88805e8b37b0, ffff88805e8b3c40) The buggy address belongs to the physical page: page:ffffea00017a2c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5e8b0 head:ffffea00017a2c00 order:2 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff8880791f5781 flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000840 ffff888019a4da00 dead000000000122 0000000000000000 raw: 0000000000000000 00000000000c000c 00000001ffffffff ffff8880791f5781 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Reclaimable, gfp_mask 0x1d20d0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 5904, tgid 5904 (syz-executor), ts 89693234377, free_ts 23549062454 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1cd/0x210 mm/page_alloc.c:1554 prep_new_page mm/page_alloc.c:1561 [inline] get_page_from_freelist+0x195c/0x19f0 mm/page_alloc.c:3191 __alloc_pages+0x1e3/0x460 mm/page_alloc.c:4457 alloc_slab_page+0x5d/0x170 mm/slub.c:1881 allocate_slab mm/slub.c:2028 [inline] new_slab+0x87/0x2e0 mm/slub.c:2081 ___slab_alloc+0xc6d/0x1300 mm/slub.c:3253 __slab_alloc mm/slub.c:3339 [inline] __slab_alloc_node mm/slub.c:3392 [inline] slab_alloc_node mm/slub.c:3485 [inline] slab_alloc mm/slub.c:3503 [inline] __kmem_cache_alloc_lru mm/slub.c:3510 [inline] kmem_cache_alloc_lru+0x1ae/0x2e0 mm/slub.c:3526 alloc_inode_sb include/linux/fs.h:2946 [inline] alloc_inode fs/inode.c:263 [inline] new_inode_pseudo+0x82/0x1d0 fs/inode.c:1049 new_inode+0x22/0x1b0 fs/inode.c:1075 debugfs_get_inode fs/debugfs/inode.c:72 [inline] __debugfs_create_file+0x148/0x500 fs/debugfs/inode.c:431 nsim_udp_tunnels_info_create+0x295/0x770 drivers/net/netdevsim/udp_tunnels.c:162 nsim_init_netdevsim drivers/net/netdevsim/netdev.c:331 [inline] nsim_create+0x35c/0x4a0 drivers/net/netdevsim/netdev.c:401 __nsim_dev_port_add+0x702/0xb00 drivers/net/netdevsim/dev.c:1393 nsim_dev_port_add_all+0x35/0xe0 drivers/net/netdevsim/dev.c:1449 nsim_drv_probe+0x884/0xb70 drivers/net/netdevsim/dev.c:1607 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x25b/0xb40 drivers/base/dd.c:658 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1154 [inline] free_unref_page_prepare+0x7ce/0x8e0 mm/page_alloc.c:2336 free_unref_page+0x32/0x2e0 mm/page_alloc.c:2429 free_contig_range+0xa1/0x160 mm/page_alloc.c:6369 destroy_args+0x80/0x850 mm/debug_vm_pgtable.c:1015 debug_vm_pgtable+0x3cc/0x410 mm/debug_vm_pgtable.c:1400 do_one_initcall+0x1fd/0x750 init/main.c:1250 do_initcall_level+0x137/0x1f0 init/main.c:1312 do_initcalls+0x69/0xd0 init/main.c:1328 kernel_init_freeable+0x3d2/0x570 init/main.c:1565 kernel_init+0x1d/0x1c0 init/main.c:1455 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 Memory state around the buggy address: ffff88805e8b3e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88805e8b3e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88805e8b3f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88805e8b3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88805e8b4000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================