REISERFS warning (device loop1): vs-13060 reiserfs_update_sd_size: stat data of object [2 8 0x0 SD] (nlink == 1) not found (pos 2) REISERFS warning (device loop1): vs-13060 reiserfs_update_sd_size: stat data of object [2 8 0x0 SD] (nlink == 1) not found (pos 1) ================================================================== BUG: KASAN: use-after-free in leaf_paste_in_buffer+0x578/0x9f0 fs/reiserfs/lbalance.c:-1 Write of size 4048 at addr ffff0000f97c6030 by task syz.1.948/7831 CPU: 0 PID: 7831 Comm: syz.1.948 Not tainted 5.15.179-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call trace: dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 print_address_description+0x7c/0x3f0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x174/0x1e4 mm/kasan/report.c:451 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x274/0x2b4 mm/kasan/generic.c:189 memcpy+0xb4/0xe8 mm/kasan/shadow.c:66 leaf_paste_in_buffer+0x578/0x9f0 fs/reiserfs/lbalance.c:-1 balance_leaf_paste_left_whole fs/reiserfs/do_balan.c:564 [inline] balance_leaf_paste_left fs/reiserfs/do_balan.c:594 [inline] balance_leaf_left fs/reiserfs/do_balan.c:613 [inline] balance_leaf+0x49ec/0xe860 fs/reiserfs/do_balan.c:1409 do_balance+0x27c/0x790 fs/reiserfs/do_balan.c:1888 reiserfs_paste_into_item+0x630/0x744 fs/reiserfs/stree.c:2159 reiserfs_get_block+0x1820/0x3fd0 fs/reiserfs/inode.c:1077 __block_write_begin_int+0x3ec/0x1608 fs/buffer.c:2012 __block_write_begin+0x40/0x54 fs/buffer.c:2062 reiserfs_write_begin+0x3c8/0x654 fs/reiserfs/inode.c:2790 pagecache_write_begin+0xa0/0xc0 mm/filemap.c:3608 generic_cont_expand_simple+0x12c/0x208 fs/buffer.c:2362 reiserfs_setattr+0x37c/0xd94 fs/reiserfs/inode.c:3319 notify_change+0xa34/0xcf8 fs/attr.c:505 do_truncate+0x1c0/0x28c fs/open.c:65 do_sys_ftruncate+0x288/0x31c fs/open.c:193 __do_sys_ftruncate fs/open.c:204 [inline] __se_sys_ftruncate fs/open.c:202 [inline] __arm64_sys_ftruncate+0x60/0x74 fs/open.c:202 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 The buggy address belongs to the page: page:00000000b2e54f39 refcount:0 mapcount:0 mapping:0000000000000000 index:0x100 pfn:0x1397c6 flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000000000 dead000000000100 dead000000000122 0000000000000000 raw: 0000000000000100 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000f97c5f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff0000f97c5f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff0000f97c6000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff0000f97c6080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff0000f97c6100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== REISERFS panic (device loop1): vs-12195 balance_leaf: CFR not initialized ------------[ cut here ]------------ kernel BUG at fs/reiserfs/prints.c:390! Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 7831 Comm: syz.1.948 Tainted: G B 5.15.179-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __reiserfs_panic+0x150/0x154 fs/reiserfs/prints.c:384 lr : __reiserfs_panic+0x150/0x154 fs/reiserfs/prints.c:384 sp : ffff8000210161c0 x29: ffff800021016280 x28: ffff800021016b18 x27: 0000000000000070 x26: dfff800000000000 x25: 0000000000000000 x24: ffff800021016240 x23: ffff800021016200 x22: ffff800011d95440 x21: ffff0000c137a000 x20: ffff800011d95420 x19: ffff800014297a47 x18: 0000000000000001 x17: 0000000000000002 x16: ffff800008336cf0 x15: 00000000ffffffff x14: ffff0000ccd98000 x13: 0000000000000001 x12: 0000000000080000 x11: 000000000001c048 x10: ffff800024f4b000 x9 : 82ef78c9bdb99000 x8 : 82ef78c9bdb99000 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800021015938 x4 : ffff800014c4fe40 x3 : ffff800008336e3c x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000049 Call trace: __reiserfs_panic+0x150/0x154 fs/reiserfs/prints.c:384 balance_leaf+0xd1cc/0xe860 fs/reiserfs/do_balan.c:1439 do_balance+0x27c/0x790 fs/reiserfs/do_balan.c:1888 reiserfs_paste_into_item+0x630/0x744 fs/reiserfs/stree.c:2159 reiserfs_get_block+0x1820/0x3fd0 fs/reiserfs/inode.c:1077 __block_write_begin_int+0x3ec/0x1608 fs/buffer.c:2012 __block_write_begin+0x40/0x54 fs/buffer.c:2062 reiserfs_write_begin+0x3c8/0x654 fs/reiserfs/inode.c:2790 pagecache_write_begin+0xa0/0xc0 mm/filemap.c:3608 generic_cont_expand_simple+0x12c/0x208 fs/buffer.c:2362 reiserfs_setattr+0x37c/0xd94 fs/reiserfs/inode.c:3319 notify_change+0xa34/0xcf8 fs/attr.c:505 do_truncate+0x1c0/0x28c fs/open.c:65 do_sys_ftruncate+0x288/0x31c fs/open.c:193 __do_sys_ftruncate fs/open.c:204 [inline] __se_sys_ftruncate fs/open.c:202 [inline] __arm64_sys_ftruncate+0x60/0x74 fs/open.c:202 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Code: f0096205 912700a5 aa1303e4 95c9429c (d4210000) ---[ end trace 473d1b327f4deee7 ]---