=================================================================== Unable to handle kernel paging request at virtual address dfff800000000047 KASAN: null-ptr-deref in range [0x0000000000000238-0x000000000000023f] Mem abort info: ESR = 0x0000000096000006 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x06: level 2 translation fault Data abort info: ISV = 0, ISS = 0x00000006 CM = 0, WnR = 0 [dfff800000000047] address between user and kernel address ranges Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 5295 Comm: syz.0.140 Not tainted 6.1.132-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : scnprintf_block_head fs/reiserfs/prints.c:152 [inline] pc : prepare_error_buf+0xf28/0x1678 fs/reiserfs/prints.c:245 lr : prepare_error_buf+0x6d8/0x1678 fs/reiserfs/prints.c:246 sp : ffff800022296840 x29: ffff8000222969e0 x28: ffff80001ceb29b9 x27: ffff80001ceb1ab9 x26: ffff800022296940 x25: ffff800022296ae0 x24: ffff800022296af8 x23: ffff80001ceb1aa0 x22: 0000000000000400 x21: ffff800022296ae8 x20: 000000000000023f x19: dfff800000000000 x18: ffff800022296540 x17: ffff800018c58000 x16: ffff8000084f3ce0 x15: 0000000000000000 x14: 000000000000007a x13: ffff0000f1b25340 x12: 0000000000ff0100 x11: 0000000000ff0100 x10: 0000000000000000 x9 : ffff800008d89430 x8 : 0000000000000047 x7 : 20736e6961746e6f x6 : 6961746e6f632029 x5 : ffff80001ceb1ab9 x4 : ffff80001ceb29b9 x3 : ffff8000122e0810 x2 : 000000000000000b x1 : 00000000ffffffc8 x0 : 00000000fffffff9 Call trace: scnprintf_block_head fs/reiserfs/prints.c:152 [inline] prepare_error_buf+0xf28/0x1678 fs/reiserfs/prints.c:245 reiserfs_printk+0xdc/0x134 fs/reiserfs/prints.c:312 print_leaf fs/reiserfs/prints.c:496 [inline] print_block+0x34c/0x1538 fs/reiserfs/prints.c:626 reiserfs_cut_from_item+0x1904/0x1c98 fs/reiserfs/stree.c:1726 reiserfs_do_truncate+0x89c/0x11c8 fs/reiserfs/stree.c:1973 reiserfs_truncate_file+0x510/0xb1c fs/reiserfs/inode.c:2310 reiserfs_file_release+0x710/0x884 fs/reiserfs/file.c:109 __fput+0x1c8/0x7c8 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x240/0x2f0 kernel/task_work.c:203 exit_task_work include/linux/task_work.h:39 [inline] do_exit+0x550/0x1a84 kernel/exit.c:871 do_group_exit+0x194/0x22c kernel/exit.c:1021 get_signal+0x143c/0x1528 kernel/signal.c:2871 do_signal arch/arm64/kernel/signal.c:1076 [inline] do_notify_resume+0x388/0x2cb8 arch/arm64/kernel/signal.c:1129 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] asm_exit_to_user_mode+0x70/0x84 arch/arm64/kernel/entry-common.c:149 ret_from_fork+0x1c/0x20 arch/arm64/kernel/entry.S:867 Code: 97efafec f9400288 9100a114 d343fe88 (38736908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 97efafec bl 0xffffffffffbebfb0 4: f9400288 ldr x8, [x20] 8: 9100a114 add x20, x8, #0x28 c: d343fe88 lsr x8, x20, #3 * 10: 38736908 ldrb w8, [x8, x19] <-- trapping instruction