Unable to handle kernel paging request at virtual address dfff800000000006 KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] Mem abort info: ESR = 0x0000000096000005 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x05: level 1 translation fault Data abort info: ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [dfff800000000006] address between user and kernel address ranges Internal error: Oops: 0000000096000005 [#1] SMP Modules linked in: CPU: 0 UID: 0 PID: 6813 Comm: syz.4.34 Not tainted 6.16.0-rc2-syzkaller-g9aa9b43d689e #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : diRead+0x354/0xa20 fs/jfs/jfs_imap.c:342 lr : diRead+0x2e0/0xa20 fs/jfs/jfs_imap.c:338 sp : ffff8000a3a17530 x29: ffff8000a3a17580 x28: dfff800000000000 x27: 0000000000000000 x26: 000000000000001c x25: ffff0000de0618b8 x24: ffff0000f285784e x23: 0000000000000034 x22: ffff0000ddeb0d68 x21: ffff0000ddea16e0 x20: ffff0000ddea16c8 x19: 0000000000000004 x18: 1fffe000337dc876 x17: ffff80008f62e000 x16: ffff80008aecb76c x15: 0000000000000001 x14: 1fffe0001bbd6140 x13: 0000000000000000 x12: 0000000000000000 x11: ffff60001bbd6141 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : 0000000000000006 x7 : ffff800081bc8390 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000805195c0 x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000020 Call trace: diRead+0x354/0xa20 fs/jfs/jfs_imap.c:342 (P) jfs_iget+0x80/0x388 fs/jfs/inode.c:35 jfs_lookup+0x198/0x32c fs/jfs/namei.c:1469 __lookup_slow+0x254/0x378 fs/namei.c:1817 lookup_slow+0x5c/0x80 fs/namei.c:1834 walk_component+0x270/0x364 fs/namei.c:2138 lookup_last fs/namei.c:2639 [inline] path_lookupat+0x13c/0x3d0 fs/namei.c:2663 filename_lookup+0x1ac/0x454 fs/namei.c:2692 user_path_at+0x50/0x74 fs/namei.c:3127 do_sys_truncate+0xac/0x1a8 fs/open.c:139 __do_sys_truncate fs/open.c:153 [inline] __se_sys_truncate fs/open.c:151 [inline] __arm64_sys_truncate+0x5c/0x74 fs/open.c:151 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Code: 97c2c457 f94002e8 9100d117 d343fee8 (38fc6908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 97c2c457 bl 0xffffffffff0b115c 4: f94002e8 ldr x8, [x23] 8: 9100d117 add x23, x8, #0x34 c: d343fee8 lsr x8, x23, #3 * 10: 38fc6908 ldrsb w8, [x8, x28] <-- trapping instruction