Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] CPU: 0 UID: 0 PID: 6209 Comm: syz.0.96 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:task_cpu include/linux/sched.h:2268 [inline] RIP: 0010:is_task_rq_idle kernel/sched/core.c:6169 [inline] RIP: 0010:cookie_equals kernel/sched/core.c:6174 [inline] RIP: 0010:pick_next_task kernel/sched/core.c:6355 [inline] RIP: 0010:__schedule+0x4030/0x5550 kernel/sched/core.c:7143 Code: 24 80 00 00 00 e8 80 67 fc f6 48 8b 84 24 80 00 00 00 48 8b 18 4c 8d 7b 14 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 87 04 00 00 45 8b 3f 49 83 ff 08 0f 83 98 RSP: 0018:ffffc900079a6f40 EFLAGS: 00010003 RAX: 0000000000000002 RBX: 0000000000000000 RCX: dffffc0000000000 RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffff8880b8620c60 RBP: ffffc900079a7128 R08: ffffffff8f8d70f7 R09: 1ffffffff1f1ae1e R10: dffffc0000000000 R11: fffffbfff1f1ae1f R12: ffff8880b863c658 R13: ffff888125eb8000 R14: 1ffff110170c7922 R15: 0000000000000014 FS: 00007fe3feadd6c0(0000) GS:ffff888125eb8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc1f55dd60 CR3: 00000000328e8000 CR4: 00000000003526f0 Call Trace: preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7552 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline] irqentry_exit+0x14f/0x8c0 kernel/entry/common.c:167 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:679 RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x80 kernel/kcov.c:216 Code: 8b 3d b4 c4 ca 0b 48 89 de 5b e9 43 78 60 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0d 58 f4 b0 10 65 8b 35 79 f4 b0 10 81 e6 00 00 ff 00 ba RSP: 0018:ffffc900079a7258 EFLAGS: 00000202 RAX: ffffffff81b9e039 RBX: 000000000000000d RCX: ffff888025833e00 RDX: 0000000000000002 RSI: 000000000000000d RDI: 00000000000000ff RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000073 R12: ffffffff89073233 R13: 000000000000004d R14: 00000000000000e0 R15: ffffffff8cb686cf get_symbol_offset kernel/kallsyms.c:143 [inline] kallsyms_lookup_buildid+0x1c9/0x6a0 kernel/kallsyms.c:381 __sprint_symbol+0x1af/0x400 kernel/kallsyms.c:483 symbol_string+0x13f/0x400 lib/vsprintf.c:1007 pointer+0x6fd/0x11f0 lib/vsprintf.c:2530 vsnprintf+0x626/0xef0 lib/vsprintf.c:2939 snprintf+0xe8/0x140 lib/vsprintf.c:3033 trim_netdev_trace+0x29f/0x840 net/core/dev.c:13455 save_netdev_trace_buffer+0x112/0x5f0 net/core/dev.c:13492 __dev_hold include/linux/netdevice.h:4489 [inline] netdev_hold include/linux/netdevice.h:4532 [inline] dev_hold include/linux/netdevice.h:4555 [inline] dev_get_by_index+0x1b3/0x2f0 net/core/dev.c:1002 j1939_sk_bind+0x278/0xb30 net/can/j1939/socket.c:481 __sys_bind_socket net/socket.c:1935 [inline] __sys_bind+0x2e9/0x410 net/socket.c:1966 __do_sys_bind net/socket.c:1971 [inline] __se_sys_bind net/socket.c:1969 [inline] __x64_sys_bind+0x7a/0x90 net/socket.c:1969 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe4008ace59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe3feadd028 EFLAGS: 00000246 ORIG_RAX: 0000000000000031 RAX: ffffffffffffffda RBX: 00007fe400b26090 RCX: 00007fe4008ace59 RDX: 0000000000000018 RSI: 00002000000000c0 RDI: 0000000000000009 RBP: 00007fe400942d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe400b26128 R14: 00007fe400b26090 R15: 00007ffc2c6f9278 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:task_cpu include/linux/sched.h:2268 [inline] RIP: 0010:is_task_rq_idle kernel/sched/core.c:6169 [inline] RIP: 0010:cookie_equals kernel/sched/core.c:6174 [inline] RIP: 0010:pick_next_task kernel/sched/core.c:6355 [inline] RIP: 0010:__schedule+0x4030/0x5550 kernel/sched/core.c:7143 Code: 24 80 00 00 00 e8 80 67 fc f6 48 8b 84 24 80 00 00 00 48 8b 18 4c 8d 7b 14 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 87 04 00 00 45 8b 3f 49 83 ff 08 0f 83 98 RSP: 0018:ffffc900079a6f40 EFLAGS: 00010003 RAX: 0000000000000002 RBX: 0000000000000000 RCX: dffffc0000000000 RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffff8880b8620c60 RBP: ffffc900079a7128 R08: ffffffff8f8d70f7 R09: 1ffffffff1f1ae1e R10: dffffc0000000000 R11: fffffbfff1f1ae1f R12: ffff8880b863c658 R13: ffff888125eb8000 R14: 1ffff110170c7922 R15: 0000000000000014 FS: 00007fe3feadd6c0(0000) GS:ffff888125eb8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc1f55dd60 CR3: 00000000328e8000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 24 80 and $0x80,%al 2: 00 00 add %al,(%rax) 4: 00 e8 add %ch,%al 6: 80 67 fc f6 andb $0xf6,-0x4(%rdi) a: 48 8b 84 24 80 00 00 mov 0x80(%rsp),%rax 11: 00 12: 48 8b 18 mov (%rax),%rbx 15: 4c 8d 7b 14 lea 0x14(%rbx),%r15 19: 4c 89 f8 mov %r15,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 27: fc ff df * 2a: 0f b6 04 08 movzbl (%rax,%rcx,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 0f 85 87 04 00 00 jne 0x4bd 36: 45 8b 3f mov (%r15),%r15d 39: 49 83 ff 08 cmp $0x8,%r15 3d: 0f .byte 0xf 3e: 83 .byte 0x83 3f: 98 cwtl