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] PREEMPT SMP Modules linked in: CPU: 0 UID: 0 PID: 8118 Comm: syz.6.220 Not tainted 6.12.0-rc5-syzkaller-g1bf329c696cf #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : diRead+0x378/0xa44 fs/jfs/jfs_imap.c:342 lr : diRead+0x304/0xa44 fs/jfs/jfs_imap.c:338 sp : ffff8000a3e374f0 x29: ffff8000a3e37540 x28: dfff800000000000 x27: 0000000000000000 x26: 0000000000000024 x25: ffff0000d3c79c98 x24: ffff0000c1cfde4e x23: 0000000000000034 x22: ffff0000f3ab1fd8 x21: ffff0000f3ab3bc0 x20: ffff0000f3ab3ba8 x19: 0000000000000020 x18: 1fffe000366c7076 x17: ffff80008f7fd000 x16: ffff8000830cb434 x15: 0000000000000001 x14: 1fffe0001e75638e x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000040000 x10: 0000000000001909 x9 : ffff80009e105000 x8 : 0000000000000006 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000008 x3 : ffff800080354364 x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000020 Call trace: diRead+0x378/0xa44 fs/jfs/jfs_imap.c:342 (P) diRead+0x304/0xa44 fs/jfs/jfs_imap.c:338 (L) jfs_iget+0x80/0x378 fs/jfs/inode.c:35 jfs_lookup+0x1e8/0x39c fs/jfs/namei.c:1469 __lookup_slow+0x250/0x374 fs/namei.c:1732 lookup_slow+0x60/0x84 fs/namei.c:1749 walk_component+0x280/0x36c fs/namei.c:2053 lookup_last fs/namei.c:2556 [inline] path_lookupat+0x13c/0x3d0 fs/namei.c:2580 filename_lookup+0x1d4/0x4e0 fs/namei.c:2609 user_path_at+0x50/0x74 fs/namei.c:3016 do_mount fs/namespace.c:3844 [inline] __do_sys_mount fs/namespace.c:4057 [inline] __se_sys_mount fs/namespace.c:4034 [inline] __arm64_sys_mount+0x424/0x5a8 fs/namespace.c:4034 __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+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Code: 97bf337b f94002e8 9100d117 d343fee8 (38fc6908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 97bf337b bl 0xfffffffffefccdec 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