Unable to handle kernel NULL pointer dereference at virtual address 0000000000000aa8 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 user pgtable: 4k pages, 48-bit VAs, pgdp=000000015d09b000 [0000000000000aa8] pgd=0800000165dd9003, p4d=0800000165dd9003, pud=0800000165ddd003, pmd=0000000000000000 Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 19850 Comm: syz-executor.2 Not tainted 6.1.0-rc4-syzkaller-31872-g1621b6eaebf7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 pstate: 204000c5 (nzCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : mem_cgroup_track_foreign_dirty_slowpath+0x3c/0x1dc mm/memcontrol.c:4655 lr : mem_cgroup_track_foreign_dirty_slowpath+0x38/0x1dc mm/memcontrol.c:4646 sp : ffff800014d7b750 x29: ffff800014d7b750 x28: ffff000125c5cec0 x27: 0c00000000000001 x26: 0000000000000001 x25: 0000000000000011 x24: 0000000000000100 x23: ffff80000d2c9000 x22: 0000000100001e96 x21: fffffc0004053580 x20: ffff0000c429b060 x19: 0000000000000000 x18: 00000000000000c0 x17: ffff80000dcdc198 x16: ffff80000db1a158 x15: ffff000125c5cec0 x14: 0000000000000000 x13: 00000000ffffffff x12: 0000000000040000 x11: 00000000000038c8 x10: ffff80001a349000 x9 : 0000000000000000 x8 : ffff0000c429b000 x7 : ffff800008572d58 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000000 x3 : 0000000000000002 x2 : 0000000000000010 x1 : ffff80000caf0858 x0 : 0000000000000001 Call trace: mem_cgroup_track_foreign_dirty_slowpath+0x3c/0x1dc mem_cgroup_track_foreign_dirty include/linux/memcontrol.h:1662 [inline] folio_account_dirtied+0x3a8/0x650 mm/page-writeback.c:2576 __folio_mark_dirty+0xbc/0x180 mm/page-writeback.c:2616 block_dirty_folio+0x11c/0x210 fs/buffer.c:640 folio_mark_dirty+0xbc/0x218 mm/page-writeback.c:2749 filemap_page_mkwrite+0x26c/0x5ec mm/filemap.c:3433 do_page_mkwrite+0x74/0x288 mm/memory.c:2978 wp_page_shared+0x8c/0x364 mm/memory.c:3324 do_wp_page+0x794/0xd10 mm/memory.c:3474 handle_pte_fault mm/memory.c:4973 [inline] __handle_mm_fault mm/memory.c:5097 [inline] handle_mm_fault+0x880/0xa48 mm/memory.c:5218 __do_page_fault arch/arm64/mm/fault.c:506 [inline] do_page_fault+0x428/0x79c arch/arm64/mm/fault.c:606 do_mem_abort+0x54/0x130 arch/arm64/mm/fault.c:825 el1_abort+0x3c/0x5c arch/arm64/kernel/entry-common.c:367 el1h_64_sync_handler+0x60/0xac arch/arm64/kernel/entry-common.c:427 el1h_64_sync+0x64/0x68 arch/arm64/kernel/entry.S:579 __arch_copy_to_user+0xa8/0x2c8 arch/arm64/lib/copy_to_user.S:153 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 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:584 Code: aa1503e0 aa1403e1 9400006a f9400288 (f9455669) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: aa1503e0 mov x0, x21 4: aa1403e1 mov x1, x20 8: 9400006a bl 0x1b0 c: f9400288 ldr x8, [x20] * 10: f9455669 ldr x9, [x19, #2728] <-- trapping instruction