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Binutils for Debian) 2.40 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11673ed2980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=150a3de6980000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/384ffdcca292/non_bootable_disk-4a4be1ad.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/75957361122b/vmlinux-4a4be1ad.xz kernel image: https://storage.googleapis.com/syzbot-assets/6c766b0ec377/Image-4a4be1ad.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+bf8cb7ae183cd5693ad9@syzkaller.appspotmail.com Unable to handle kernel NULL pointer dereference at virtual address 0000000000000058 Mem abort info: ESR = 0x0000000096000004 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x04: level 0 translation fault Data abort info: ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 user pgtable: 4k pages, 52-bit VAs, pgdp=00000000455f8880 [0000000000000058] pgd=0800000046e35003, p4d=0000000000000000 Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 3190 Comm: syz-executor681 Not tainted 6.10.0-rc1-syzkaller-00027-g4a4be1ad3a6e #0 Hardware name: linux,dummy-virt (DT) pstate: 81400009 (Nzcv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--) pc : lock_cluster mm/swapfile.c:356 [inline] pc : lock_cluster_or_swap_info mm/swapfile.c:380 [inline] pc : __swap_duplicate+0x3c/0x178 mm/swapfile.c:3339 lr : swap_duplicate+0x2c/0x54 mm/swapfile.c:3407 sp : ffff800088dd3910 x29: ffff800088dd3910 x28: fff0000006e8cc88 x27: f0f0000006d3bb40 x26: 0000000000000000 x25: fdf0000005ab3900 x24: fcf00000060bf0c0 x23: 0000000000000001 x22: 0000000000000000 x21: 0000000000000000 x20: 0000000000000080 x19: 0000000000000000 x18: 0000000000000001 x17: 0000000000000000 x16: 1f9e000000c1afc1 x15: 0000000000000001 x14: 0000000000000002 x13: 0000000000000000 x12: 0000000000071c09 x11: 0000000000000000 x10: 0000ffffced91000 x9 : 00000000000000f7 x8 : 0000000000000038 x7 : 0000000000000026 x6 : 0000000200100173 x5 : ffff800088dd3900 x4 : 0000000000000080 x3 : ffff8000828a1ad8 x2 : 0000000000000002 x1 : 0000000000000001 x0 : 0800000000000000 Call trace: swp_offset include/linux/swapops.h:109 [inline] __swap_duplicate+0x3c/0x178 mm/swapfile.c:3338 swap_duplicate+0x2c/0x54 mm/swapfile.c:3407 copy_nonpresent_pte mm/memory.c:793 [inline] copy_pte_range mm/memory.c:1129 [inline] copy_pmd_range mm/memory.c:1240 [inline] copy_pud_range mm/memory.c:1277 [inline] copy_p4d_range mm/memory.c:1301 [inline] copy_page_range+0x1154/0x20a0 mm/memory.c:1399 dup_mmap kernel/fork.c:751 [inline] dup_mm kernel/fork.c:1688 [inline] copy_mm+0x420/0x7d4 kernel/fork.c:1737 copy_process+0xc30/0x1484 kernel/fork.c:2390 kernel_clone+0x64/0x360 kernel/fork.c:2797 __do_sys_clone+0x70/0xa8 kernel/fork.c:2940 __se_sys_clone kernel/fork.c:2908 [inline] __arm64_sys_clone+0x20/0x2c kernel/fork.c:2908 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x48/0x118 arch/arm64/kernel/syscall.c:48 el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:133 do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:152 el0_svc+0x34/0xf8 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:598 Code: b0012ee3 912b6063 f8627875 9240e413 (f9402ea2) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: b0012ee3 adrp x3, 0x25dd000 4: 912b6063 add x3, x3, #0xad8 8: f8627875 ldr x21, [x3, x2, lsl #3] c: 9240e413 and x19, x0, #0x3ffffffffffffff * 10: f9402ea2 ldr x2, [x21, #88] <-- trapping instruction --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup