Unable to handle kernel paging request at virtual address dfff800000000008 KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047] 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 [dfff800000000008] address between user and kernel address ranges Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 13144 Comm: syz-executor.2 Not tainted 6.4.0-rc2-syzkaller-gf1fcbaa18b28 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : generic_test_bit include/asm-generic/bitops/generic-non-atomic.h:128 [inline] pc : txBegin+0x138/0x5e0 fs/jfs/jfs_txnmgr.c:366 lr : txBegin+0x104/0x5e0 fs/jfs/jfs_txnmgr.c:357 sp : ffff8000205d7440 x29: ffff8000205d7460 x28: dfff800000000000 x27: 0000000000000000 x26: ffff8000205d7690 x25: 0000000000000040 x24: 0000000000000000 x23: ffff80001644ea60 x22: ffff0000ce28b830 x21: 0000000000000150 x20: 0000000000000008 x19: 0000000000000000 x18: ffff8000205d7120 x17: ffff800008a95738 x16: ffff8000083280a0 x15: 0000000000039418 x14: 0000000034b88380 x13: dfff800000000000 x12: ffff7000040bae70 x11: 0000000000000001 x10: 0000000000000000 x9 : 0000000000000002 x8 : 1ffff00002c88718 x7 : 0000000000000000 x6 : 0000000000000000 x5 : ffff8000195a9d20 x4 : 0000000000000008 x3 : ffff8000083281d0 x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: txBegin+0x138/0x5e0 fs/jfs/jfs_txnmgr.c:362 jfs_create+0x1d4/0xa1c fs/jfs/namei.c:98 lookup_open fs/namei.c:3492 [inline] open_last_lookups fs/namei.c:3560 [inline] path_openat+0xf80/0x27f8 fs/namei.c:3788 do_filp_open+0x1bc/0x3cc fs/namei.c:3818 do_sys_openat2+0x128/0x3d8 fs/open.c:1356 do_sys_open fs/open.c:1372 [inline] __do_sys_openat fs/open.c:1388 [inline] __se_sys_openat fs/open.c:1383 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1383 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 Code: 9400012e aa1703e0 959481f3 350002f8 (387c6a88) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 9400012e bl 0x4b8 4: aa1703e0 mov x0, x23 8: 959481f3 bl 0x65207d4 c: 350002f8 cbnz w24, 0x68 * 10: 387c6a88 ldrb w8, [x20, x28] <-- trapping instruction