================================================================== BUG: KASAN: vmalloc-out-of-bounds in cleanup_bitmap_list+0x14c/0x46c fs/reiserfs/journal.c:231 Read of size 8 at addr ffff8000203de008 by task syz-executor/4325 CPU: 1 PID: 4325 Comm: syz-executor Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106 print_address_description+0x88/0x218 mm/kasan/report.c:316 print_report+0x50/0x68 mm/kasan/report.c:420 kasan_report+0xa8/0x100 mm/kasan/report.c:524 __asan_report_load8_noabort+0x2c/0x38 mm/kasan/report_generic.c:351 cleanup_bitmap_list+0x14c/0x46c fs/reiserfs/journal.c:231 free_list_bitmaps+0x50/0x184 fs/reiserfs/journal.c:249 free_journal_ram+0xd0/0x374 fs/reiserfs/journal.c:1887 do_journal_release+0x2e0/0x43c fs/reiserfs/journal.c:1960 journal_release+0x2c/0x40 fs/reiserfs/journal.c:1971 reiserfs_put_super+0x1ec/0x428 fs/reiserfs/super.c:616 generic_shutdown_super+0x130/0x324 fs/super.c:501 kill_block_super+0x70/0xdc fs/super.c:1470 reiserfs_kill_sb+0x124/0x13c fs/reiserfs/super.c:570 deactivate_locked_super+0xac/0x124 fs/super.c:332 deactivate_super+0xe8/0x108 fs/super.c:363 cleanup_mnt+0x37c/0x404 fs/namespace.c:1191 __cleanup_mnt+0x20/0x30 fs/namespace.c:1198 task_work_run+0x1ec/0x270 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x2038/0x2b28 arch/arm64/kernel/signal.c:1137 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x98/0x138 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 The buggy address belongs to a 1-page vmalloc region starting at 0xffff8000203de000 allocated at reiserfs_allocate_list_bitmaps+0x5c/0x204 fs/reiserfs/journal.c:290 The buggy address belongs to the physical page: page:0000000044f88c3d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x126086 flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8000203ddf00: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffff8000203ddf80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 >ffff8000203de000: 00 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffff8000203de080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffff8000203de100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ================================================================== Unable to handle kernel paging request at virtual address ffff8000203df000 KASAN: probably user-memory-access in range [0x0000000101ef8000-0x0000000101ef8007] Mem abort info: ESR = 0x0000000096000007 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x07: level 3 translation fault Data abort info: ISV = 0, ISS = 0x00000007 CM = 0, WnR = 0 swapper pgtable: 4k pages, 48-bit VAs, pgdp=000000020e40f000 [ffff8000203df000] pgd=100000023ffff003, p4d=100000023ffff003, pud=100000023fffe003, pmd=1000000108900003, pte=0000000000000000 Internal error: Oops: 0000000096000007 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 4325 Comm: syz-executor Tainted: G B syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 pstate: 02400005 (nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : cleanup_bitmap_list+0x14c/0x46c fs/reiserfs/journal.c:231 lr : cleanup_bitmap_list+0x14c/0x46c fs/reiserfs/journal.c:231 sp : ffff800020d77600 x29: ffff800020d77640 x28: dfff800000000000 x27: ffff800020ec92e0 x26: 1ffff000041d925c x25: ffff0000c3ae8678 x24: ffff0000c37a7000 x23: ffff0000c3ae8018 x22: ffff8000203df000 x21: 0000000000000200 x20: 0000000000000201 x19: 00000000d2c8a592 x18: ffff800011a6bd40 x17: 1fffe00033eeb97e x16: ffff800008042d90 x15: ffff80001504d000 x14: 0000000000000100 x13: 0000000000000120 x12: 0000000000ff0100 x11: ff00800008cde1e8 x10: 0000000000000000 x9 : ffff80001c2b3a90 x8 : 0000000000000001 x7 : 0000000000000004 x6 : ffff800008254344 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff800008cddfbc x2 : 0000000000000000 x1 : 0000000000000008 x0 : 0000000000000000 Call trace: cleanup_bitmap_list+0x14c/0x46c fs/reiserfs/journal.c:231 free_list_bitmaps+0x50/0x184 fs/reiserfs/journal.c:249 free_journal_ram+0xd0/0x374 fs/reiserfs/journal.c:1887 do_journal_release+0x2e0/0x43c fs/reiserfs/journal.c:1960 journal_release+0x2c/0x40 fs/reiserfs/journal.c:1971 reiserfs_put_super+0x1ec/0x428 fs/reiserfs/super.c:616 generic_shutdown_super+0x130/0x324 fs/super.c:501 kill_block_super+0x70/0xdc fs/super.c:1470 reiserfs_kill_sb+0x124/0x13c fs/reiserfs/super.c:570 deactivate_locked_super+0xac/0x124 fs/super.c:332 deactivate_super+0xe8/0x108 fs/super.c:363 cleanup_mnt+0x37c/0x404 fs/namespace.c:1191 __cleanup_mnt+0x20/0x30 fs/namespace.c:1198 task_work_run+0x1ec/0x270 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x2038/0x2b28 arch/arm64/kernel/signal.c:1137 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x98/0x138 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Code: 387c6908 34000068 aa1603e0 97eff010 (f94002d6) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 387c6908 ldrb w8, [x8, x28] 4: 34000068 cbz w8, 0x10 8: aa1603e0 mov x0, x22 c: 97eff010 bl 0xffffffffffbfc04c * 10: f94002d6 ldr x22, [x22] <-- trapping instruction