Unable to handle kernel paging request at virtual address dfff800000000000 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 [dfff800000000000] address between user and kernel address ranges Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 4192 Comm: syz.4.27 Not tainted 5.15.173-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : btrfs_root_node+0x84/0x404 fs/btrfs/ctree.c:130 lr : rcu_read_lock include/linux/rcupdate.h:740 [inline] lr : btrfs_root_node+0x84/0x404 fs/btrfs/ctree.c:129 sp : ffff8000207a71a0 x29: ffff8000207a71a0 x28: dfff800000000000 x27: ffff80001206b2c0 x26: ffff80001206ba00 x25: ffff80001206ba40 x24: 0000000000000000 x23: ffff800016fbb000 x22: 0000000000000001 x21: 0000000000000001 x20: ffff800016fbb000 x19: 0000000000000000 x18: 0000000000000000 x17: 0000000000000002 x16: ffff800011b4c108 x15: ffff800008a107f0 x14: 1ffff0000296c06c x13: dfff800000000000 x12: 0000000000080000 x11: 000000000007ffff x10: ffff800024aa9000 x9 : 0000000000080000 x8 : ffff80000a04b3b4 x7 : ffff80000a05f098 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000002 x2 : 0000000000000008 x1 : ffff8000121555c0 x0 : 0000000000000001 Call trace: rcu_read_lock include/linux/rcupdate.h:740 [inline] btrfs_root_node+0x84/0x404 fs/btrfs/ctree.c:129 btrfs_read_lock_root_node+0x68/0x344 fs/btrfs/locking.c:276 btrfs_build_ref_tree+0xfc/0x124c fs/btrfs/ref-verify.c:992 open_ctree+0x2198/0x28f4 fs/btrfs/disk-io.c:3609 btrfs_fill_super+0x1b4/0x2c8 fs/btrfs/super.c:1387 btrfs_mount_root+0x6f8/0x7f8 fs/btrfs/super.c:1752 legacy_get_tree+0xd4/0x16c fs/fs_context.c:611 vfs_get_tree+0x90/0x274 fs/super.c:1530 fc_mount fs/namespace.c:1000 [inline] vfs_kern_mount+0xdc/0x178 fs/namespace.c:1030 btrfs_mount+0x328/0x9b8 fs/btrfs/super.c:1812 legacy_get_tree+0xd4/0x16c fs/fs_context.c:611 vfs_get_tree+0x90/0x274 fs/super.c:1530 do_new_mount+0x278/0x8fc fs/namespace.c:3012 path_mount+0x594/0x101c fs/namespace.c:3342 do_mount fs/namespace.c:3355 [inline] __do_sys_mount fs/namespace.c:3563 [inline] __se_sys_mount fs/namespace.c:3540 [inline] __arm64_sys_mount+0x510/0x5e0 fs/namespace.c:3540 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Code: 340000f5 978ca30e 36000120 9791e3d3 (387c6b08) ---[ end trace 24e58b6c7c084162 ]--- ---------------- Code disassembly (best guess): 0: 340000f5 cbz w21, 0x1c 4: 978ca30e bl 0xfffffffffe328c3c 8: 36000120 tbz w0, #0, 0x2c c: 9791e3d3 bl 0xfffffffffe478f58 * 10: 387c6b08 ldrb w8, [x24, x28] <-- trapping instruction