Unable to handle kernel NULL pointer dereference at virtual address 0000000000000180 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 CM = 0, WnR = 0 user pgtable: 4k pages, 48-bit VAs, pgdp=000000010bce7000 [0000000000000180] pgd=0800000111ba7003, p4d=0800000111ba7003, pud=0000000000000000 Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 3102 Comm: syz-executor.4 Not tainted 6.1.0-rc6-syzkaller-32662-g6d464646530f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : hlist_unhashed include/linux/list.h:854 [inline] pc : get_super+0x4c/0x144 fs/super.c:790 lr : get_super+0x7c/0x144 fs/super.c:789 sp : ffff800010fb3b40 x29: ffff800010fb3b40 x28: ffff0000c5400000 x27: 0000000000000000 x26: 00000000000000c0 x25: ffff0000c58c9500 x24: ffff800009ab2ee0 x23: ffff80000d4e4400 x22: 0000000000000001 x21: ffff80000d4e43c0 x20: 0000000000000000 x19: ffff0000c58c9500 x18: 000000000000035c x17: ffff80000c0cd83c x16: ffff80000dbe6158 x15: ffff0000c5400000 x14: 0000000000000008 x13: 00000000ffffffff x12: ffff0000c5400000 x11: ff808000085c1d08 x10: 0000000000000000 x9 : ffff8000085c1d08 x8 : ffff0000c5400000 x7 : ffff8000085c1cbc x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: get_super+0x4c/0x144 __invalidate_device+0x28/0xb8 block/bdev.c:1003 disk_force_media_change+0xf0/0x198 block/disk-events.c:310 __loop_clr_fd+0x164/0x2a0 drivers/block/loop.c:1174 lo_release+0xb4/0xc8 drivers/block/loop.c:1745 blkdev_put_whole block/bdev.c:695 [inline] blkdev_put+0x200/0x284 block/bdev.c:953 kill_block_super+0x58/0x78 fs/super.c:1431 deactivate_locked_super+0x70/0xe8 fs/super.c:332 deactivate_super+0xd0/0xd4 fs/super.c:363 cleanup_mnt+0x184/0x1c0 fs/namespace.c:1186 __cleanup_mnt+0x20/0x30 fs/namespace.c:1193 task_work_run+0x100/0x148 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x174/0x1f0 arch/arm64/kernel/signal.c:1127 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x150 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 Code: eb17029f 54000620 f0027915 910f02b5 (f940c288) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: eb17029f cmp x20, x23 4: 54000620 b.eq 0xc8 // b.none 8: f0027915 adrp x21, 0x4f23000 c: 910f02b5 add x21, x21, #0x3c0 * 10: f940c288 ldr x8, [x20, #384] <-- trapping instruction