REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. REISERFS warning (device loop0): vs-13060 reiserfs_update_sd_size: stat data of object [2 6 0x0 SD] (nlink == 1) not found (pos 1) ================================================================== BUG: KASAN: use-after-free in leaf_paste_in_buffer+0x1a8/0x9f0 fs/reiserfs/lbalance.c:1017 Write of size 3936 at addr ffff0000e2cc9140 by task syz-executor508/4038 CPU: 1 PID: 4038 Comm: syz-executor508 Not tainted 5.15.167-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 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 kasan_check_range+0x274/0x2b4 mm/kasan/generic.c:189 memmove+0xb4/0xe8 mm/kasan/shadow.c:55 leaf_paste_in_buffer+0x1a8/0x9f0 fs/reiserfs/lbalance.c:1017 leaf_copy_boundary_item+0x96c/0x1a34 fs/reiserfs/lbalance.c:199 leaf_copy_items fs/reiserfs/lbalance.c:551 [inline] leaf_move_items+0xa0c/0x1f7c fs/reiserfs/lbalance.c:726 leaf_shift_left+0xc8/0x39c fs/reiserfs/lbalance.c:750 balance_leaf_paste_left_shift fs/reiserfs/do_balan.c:458 [inline] balance_leaf_paste_left fs/reiserfs/do_balan.c:592 [inline] balance_leaf_left fs/reiserfs/do_balan.c:613 [inline] balance_leaf+0x41c0/0xe860 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:00000000528df2de refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x122cc9 flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000000000 fffffc0003773c08 fffffc00038a3588 0000000000000000 raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000e2cc9000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff0000e2cc9080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff0000e2cc9100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff0000e2cc9180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff0000e2cc9200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== Unable to handle kernel write to read-only memory at virtual address ffff000161c20000 Mem abort info: ESR = 0x000000009600004f EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x0f: level 3 permission fault Data abort info: ISV = 0, ISS = 0x0000004f CM = 0, WnR = 1 swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000001ae2ee000 [ffff000161c20000] pgd=180000023fff7003, p4d=180000023fff7003, pud=180000023f211003, pmd=180000023f102003, pte=00600001a1c20783 Internal error: Oops: 000000009600004f [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 4038 Comm: syz-executor508 Tainted: G B 5.15.167-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 pstate: a0400005 (NzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __memcpy+0x150/0x260 arch/arm64/lib/memcpy.S:176 lr : memmove+0xc8/0xe8 mm/kasan/shadow.c:58 sp : ffff800022b661a0 x29: ffff800022b661a0 x28: 0000000000000000 x27: ffff0000e2cca000 x26: 0000000000000001 x25: 000000000000f140 x24: ffff0000e190c1f8 x23: ffff800017103000 x22: ffff800008cd67f4 x21: ffff0000e2cd90d0 x20: ffff0000e2cd9140 x19: ffffffffffff1ec0 x18: 1fffe00036835d8e x17: 1fffe00036835d8e x16: ffff800011ac1408 x15: 0000000000000000 x14: 0000000000000000 x13: a9014ff4a9be7bfd x12: d503233fd65f03c0 x11: d50323bfa8c37bfd x10: f9400bf5a9424ff4 x9 : f94201082a1f03e0 x8 : 531e740990065508 x7 : 95fc2e5b94129788 x6 : aa0003f3910003fd x5 : ffff0000e2ccaf90 x4 : ffff0000e2ccb000 x3 : ffff000161c1ffd0 x2 : ffffffff810aaf30 x1 : ffff000161c20080 x0 : ffff0000e2cd90d0 Call trace: __memcpy+0x150/0x260 arch/arm64/lib/memcpy.S:175 leaf_paste_in_buffer+0x1a8/0x9f0 fs/reiserfs/lbalance.c:1017 balance_leaf_paste_left_shift fs/reiserfs/do_balan.c:465 [inline] balance_leaf_paste_left fs/reiserfs/do_balan.c:592 [inline] balance_leaf_left fs/reiserfs/do_balan.c:613 [inline] balance_leaf+0x4dc0/0xe860 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 Code: a9011c66 a9411c26 a9022468 a9422428 (a9032c6a) ---[ end trace 80d47c27006b82e7 ]--- ---------------- Code disassembly (best guess): 0: a9011c66 stp x6, x7, [x3, #16] 4: a9411c26 ldp x6, x7, [x1, #16] 8: a9022468 stp x8, x9, [x3, #32] c: a9422428 ldp x8, x9, [x1, #32] * 10: a9032c6a stp x10, x11, [x3, #48] <-- trapping instruction