================================================================== BUG: KASAN: vmalloc-out-of-bounds in cleanup_bitmap_list+0x144/0x47c fs/reiserfs/journal.c:231 Read of size 8 at addr ffff800020886008 by task syz-executor/4341 CPU: 0 PID: 4341 Comm: syz-executor Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 Call trace: dump_backtrace+0x1c4/0x1f0 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+0xf4/0x15c 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+0xa8/0xfc mm/kasan/report.c:524 __asan_report_load8_noabort+0x2c/0x38 mm/kasan/report_generic.c:351 cleanup_bitmap_list+0x144/0x47c fs/reiserfs/journal.c:231 cleanup_freed_for_journal_list fs/reiserfs/journal.c:570 [inline] flush_commit_list+0x1090/0x194c fs/reiserfs/journal.c:1142 do_journal_end+0x2bc0/0x3bc0 fs/reiserfs/journal.c:4304 do_journal_release+0x410/0x460 fs/reiserfs/journal.c:1940 journal_release+0x2c/0x40 fs/reiserfs/journal.c:1971 reiserfs_put_super+0x1fc/0x450 fs/reiserfs/super.c:616 generic_shutdown_super+0x138/0x32c fs/super.c:501 kill_block_super+0x78/0xe0 fs/super.c:1470 reiserfs_kill_sb+0x124/0x13c fs/reiserfs/super.c:570 deactivate_locked_super+0xb4/0x128 fs/super.c:332 deactivate_super+0xe4/0x104 fs/super.c:363 cleanup_mnt+0x3a8/0x430 fs/namespace.c:1191 __cleanup_mnt+0x20/0x30 fs/namespace.c:1198 task_work_run+0x1f4/0x280 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x20f8/0x2c84 arch/arm64/kernel/signal.c:1151 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+0x98/0x128 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 0xffff800020886000 allocated at reiserfs_allocate_list_bitmaps+0x5c/0x214 fs/reiserfs/journal.c:290 The buggy address belongs to the physical page: page:000000005f2bd0c1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x129896 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: ffff800020885f00: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffff800020885f80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 >ffff800020886000: 00 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffff800020886080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffff800020886100: 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 ffff800020887000 KASAN: probably user-memory-access in range [0x0000000104438000-0x0000000104438007] 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=000000020dd2f000 [ffff800020887000] pgd=100000023ffff003, p4d=100000023ffff003, pud=100000023fffe003, pmd=100000010a08c003, pte=0000000000000000 Internal error: Oops: 0000000096000007 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 4341 Comm: syz-executor Tainted: G B syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 pstate: 02400005 (nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : cleanup_bitmap_list+0x144/0x47c fs/reiserfs/journal.c:231 lr : cleanup_bitmap_list+0x144/0x47c fs/reiserfs/journal.c:231 sp : ffff800020fb7350 x29: ffff800020fb7380 x28: 0000000000000201 x27: dfff800000000000 x26: ffff800020e192e0 x25: ffff0000cf6ac678 x24: 0000000000000004 x23: ffff0000d60c1000 x22: ffff800020887000 x21: ffff0000cf6ac018 x20: 1ffff000041c325c x19: 0000000000000000 x18: 1fffe00033e7277e x17: ffff80001537d000 x16: ffff800011b8ee98 x15: 0000000040000000 x14: 0000000000000001 x13: 1ffff00002ff056c x12: 0000000000000000 x11: ff00800008d03894 x10: 0000000000000000 x9 : ffff80001c5fca50 x8 : 0000000000000001 x7 : ffff800011cec160 x6 : ffff80000825ab3c x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff800008d03658 x2 : 0000000000000000 x1 : 0000000000000008 x0 : 0000000000000000 Call trace: cleanup_bitmap_list+0x144/0x47c fs/reiserfs/journal.c:231 cleanup_freed_for_journal_list fs/reiserfs/journal.c:570 [inline] flush_commit_list+0x1090/0x194c fs/reiserfs/journal.c:1142 do_journal_end+0x2bc0/0x3bc0 fs/reiserfs/journal.c:4304 do_journal_release+0x410/0x460 fs/reiserfs/journal.c:1940 journal_release+0x2c/0x40 fs/reiserfs/journal.c:1971 reiserfs_put_super+0x1fc/0x450 fs/reiserfs/super.c:616 generic_shutdown_super+0x138/0x32c fs/super.c:501 kill_block_super+0x78/0xe0 fs/super.c:1470 reiserfs_kill_sb+0x124/0x13c fs/reiserfs/super.c:570 deactivate_locked_super+0xb4/0x128 fs/super.c:332 deactivate_super+0xe4/0x104 fs/super.c:363 cleanup_mnt+0x3a8/0x430 fs/namespace.c:1191 __cleanup_mnt+0x20/0x30 fs/namespace.c:1198 task_work_run+0x1f4/0x280 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x20f8/0x2c84 arch/arm64/kernel/signal.c:1151 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+0x98/0x128 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: 387b6908 34000068 aa1603e0 97efc1ac (f94002d6) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 387b6908 ldrb w8, [x8, x27] 4: 34000068 cbz w8, 0x10 8: aa1603e0 mov x0, x22 c: 97efc1ac bl 0xffffffffffbf06bc * 10: f94002d6 ldr x22, [x22] <-- trapping instruction