BTRFS info (device loop0): enabling ssd optimizations Unable to handle kernel paging request at virtual address dfff800000000003 KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] 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 [dfff800000000003] address between user and kernel address ranges Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 5994 Comm: syz.0.307 Not tainted 6.1.140-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 : btrfs_root_node+0xe0/0x3c8 fs/btrfs/ctree.c:150 lr : rcu_read_lock include/linux/rcupdate.h:792 [inline] lr : btrfs_root_node+0x88/0x3c8 fs/btrfs/ctree.c:149 sp : ffff800020ca7250 x29: ffff800020ca7250 x28: dfff800000000000 x27: ffff800011e746a0 x26: 0000000000000001 x25: ffff800011e74e20 x24: ffff800017a30000 x23: ffff800011e74e60 x22: ffff800017a30000 x21: 0000000000000001 x20: 0000000000000003 x19: 0000000000000018 x18: ffff800011a7bd00 x17: 0000000000000000 x16: ffff8000082e7940 x15: 0000000000000002 x14: 000000001191587c x13: 1ffff00002a0e0b1 x12: 0000000000080000 x11: 000000000006918f x10: ffff800021159000 x9 : ffff800009ed0510 x8 : 0000000000069190 x7 : ffff800009ee3918 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000002 x2 : 0000000000000008 x1 : ffff800011f69460 x0 : 0000000000000001 Call trace: rcu_read_lock include/linux/rcupdate.h:792 [inline] btrfs_root_node+0xe0/0x3c8 fs/btrfs/ctree.c:149 btrfs_read_lock_root_node+0x6c/0x360 fs/btrfs/locking.c:277 btrfs_build_ref_tree+0xe4/0xf74 fs/btrfs/ref-verify.c:995 open_ctree+0x19b8/0x224c fs/btrfs/disk-io.c:3810 btrfs_fill_super+0x1b4/0x2d4 fs/btrfs/super.c:1469 btrfs_mount_root+0x730/0x780 fs/btrfs/super.c:1834 legacy_get_tree+0xd4/0x16c fs/fs_context.c:632 vfs_get_tree+0x90/0x274 fs/super.c:1573 fc_mount fs/namespace.c:1043 [inline] vfs_kern_mount+0xdc/0x178 fs/namespace.c:1073 btrfs_mount+0x2a0/0x8dc fs/btrfs/super.c:1894 legacy_get_tree+0xd4/0x16c fs/fs_context.c:632 vfs_get_tree+0x90/0x274 fs/super.c:1573 do_new_mount+0x228/0x810 fs/namespace.c:3058 path_mount+0x5b4/0xe78 fs/namespace.c:3388 do_mount fs/namespace.c:3401 [inline] __do_sys_mount fs/namespace.c:3609 [inline] __se_sys_mount fs/namespace.c:3586 [inline] __arm64_sys_mount+0x49c/0x584 fs/namespace.c:3586 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Code: 52806321 aa1703e2 391a46da 979035c3 (387c6a88) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 52806321 mov w1, #0x319 // #793 4: aa1703e2 mov x2, x23 8: 391a46da strb w26, [x22, #1681] c: 979035c3 bl 0xfffffffffe40d718 * 10: 387c6a88 ldrb w8, [x20, x28] <-- trapping instruction