Hello, syzbot found the following issue on: HEAD commit: 8de1e7afcc1c Merge branch 'for-next/core' into for-kernelci git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=158c647b680000 kernel config: https://syzkaller.appspot.com/x/.config?x=3e6feaeda5dcbc27 dashboard link: https://syzkaller.appspot.com/bug?extid=44c2416196b7c607f226 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=104da6eb680000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14df3787680000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/0f00907f9764/disk-8de1e7af.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/0502fe78c60d/vmlinux-8de1e7af.xz kernel image: https://storage.googleapis.com/syzbot-assets/192135168cc0/Image-8de1e7af.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+44c2416196b7c607f226@xxxxxxxxxxxxxxxxxxxxxxxxx netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 Unable to handle kernel paging request at virtual address dfff800000000003 KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] 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 [dfff800000000003] address between user and kernel address ranges Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 6085 Comm: syz-executor153 Not tainted 6.6.0-rc7-syzkaller-g8de1e7afcc1c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : nsim_setup_prog_hw_checks drivers/net/netdevsim/bpf.c:320 [inline] pc : nsim_bpf+0x1e0/0xae0 drivers/net/netdevsim/bpf.c:562 lr : nsim_bpf+0x8c/0xae0 drivers/net/netdevsim/bpf.c:554 sp : ffff800096c67790 x29: ffff800096c677a0 x28: dfff800000000000 x27: ffff700012d8cf00 x26: dfff800000000000 x25: ffff800096c67a00 x24: 0000000000000008 x23: ffff800096c67820 x22: 0000000000000018 x21: ffff800096c67820 x20: ffff0000d3834cc0 x19: ffff0000d3834000 x18: ffff800096c67580 x17: ffff8000805c1258 x16: ffff80008030c738 x15: 0000000000000000 x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000003 x11: ffff0000d4ab3780 x10: 00000000000000bc x9 : ffff800085ce8bf0 x8 : 0000000000000003 x7 : 0000000000000000 x6 : 0000000000000000 x5 : ffff800092dee000 x4 : 0000000000000000 x3 : ffff80008030c754 x2 : 0000000000000000 x1 : ffff80009001ef50 x0 : 0000000000000001 Call trace: nsim_setup_prog_hw_checks drivers/net/netdevsim/bpf.c:320 [inline] nsim_bpf+0x1e0/0xae0 drivers/net/netdevsim/bpf.c:562 dev_xdp_install+0x124/0x2f0 net/core/dev.c:9199 dev_xdp_attach+0xa4c/0xcc8 net/core/dev.c:9351 dev_xdp_attach_link net/core/dev.c:9370 [inline] bpf_xdp_link_attach+0x300/0x710 net/core/dev.c:9540 link_create+0x2c0/0x68c kernel/bpf/syscall.c:4954 __sys_bpf+0x4d4/0x5dc kernel/bpf/syscall.c:5414 __do_sys_bpf kernel/bpf/syscall.c:5448 [inline] __se_sys_bpf kernel/bpf/syscall.c:5446 [inline] __arm64_sys_bpf+0x80/0x98 kernel/bpf/syscall.c:5446 __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: 96b3720d f94002c8 91006116 d343fec8 (387a6908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 96b3720d bl 0xfffffffffacdc834 4: f94002c8 ldr x8, [x22] 8: 91006116 add x22, x8, #0x18 c: d343fec8 lsr x8, x22, #3 * 10: 387a6908 ldrb w8, [x8, x26] <-- 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@xxxxxxxxxxxxxxxx. 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
