Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: BUG: unable to handle kernel paging request in __pte_offset_map_lock Unable to handle kernel paging request at virtual address dfff800000000004 KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027] 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, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [dfff800000000004] address between user and kernel address ranges Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 6731 Comm: syz-executor.5 Not tainted 6.7.0-rc1-syzkaller-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 pstate: 804000c5 (Nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __lock_acquire+0x104/0x75e8 kernel/locking/lockdep.c:5004 lr : lock_acquire+0x23c/0x71c kernel/locking/lockdep.c:5753 sp : ffff800097066d40 x29: ffff800097067000 x28: ffff8000808f70ac x27: ffff700012e0ce18 x26: 1ffff00011c64088 x25: 0000000000000000 x24: 0000000000000000 x23: ffff700012e0cdd0 x22: 0000000000000000 x21: 0000000000000000 x20: 0000000000000000 x19: 0000000000000022 x18: ffff800097067750 x17: ffff80008e31d000 x16: ffff80008a73b6ac x15: 0000000000000001 x14: ffff80008e320448 x13: ffff800097066e80 x12: dfff800000000000 x11: ffff80008031ef10 x10: ffff80008e320444 x9 : 00000000000000f3 x8 : 0000000000000004 x7 : ffff8000808f70ac x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000022 Call trace: __lock_acquire+0x104/0x75e8 kernel/locking/lockdep.c:5004 lock_acquire+0x23c/0x71c kernel/locking/lockdep.c:5753 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x48/0x60 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] __pte_offset_map_lock+0x154/0x360 mm/pgtable-generic.c:378 pte_offset_map_lock include/linux/mm.h:2946 [inline] filemap_map_pages+0x5cc/0x112c mm/filemap.c:3531 do_fault_around mm/memory.c:4588 [inline] do_read_fault mm/memory.c:4621 [inline] do_fault mm/memory.c:4764 [inline] do_pte_missing mm/memory.c:3732 [inline] handle_pte_fault mm/memory.c:5040 [inline] __handle_mm_fault mm/memory.c:5181 [inline] handle_mm_fault+0x35ec/0x49f8 mm/memory.c:5346 faultin_page mm/gup.c:956 [inline] __get_user_pages+0x3e0/0xa24 mm/gup.c:1239 populate_vma_page_range+0x254/0x328 mm/gup.c:1677 __mm_populate+0x240/0x3d8 mm/gup.c:1786 mm_populate include/linux/mm.h:3379 [inline] vm_mmap_pgoff+0x2bc/0x3d4 mm/util.c:551 ksys_mmap_pgoff+0xd0/0x5b0 mm/mmap.c:1425 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline] __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline] __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 Code: 90070528 b9424108 34000208 d343fe68 (386c6908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 90070528 adrp x8, 0xe0a4000 4: b9424108 ldr w8, [x8, #576] 8: 34000208 cbz w8, 0x48 c: d343fe68 lsr x8, x19, #3 * 10: 386c6908 ldrb w8, [x8, x12] <-- trapping instruction Tested on: commit: b85ea95d Linux 6.7-rc1 git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git console output: https://syzkaller.appspot.com/x/log.txt?x=14cf3388e80000 kernel config: https://syzkaller.appspot.com/x/.config?x=fffc11e84313b7c6 dashboard link: https://syzkaller.appspot.com/bug?extid=89edd67979b52675ddec compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 patch: https://syzkaller.appspot.com/x/patch.diff?x=136db347680000
