Oops: general protection fault, probably for non-canonical address 0xdffffc000000000a: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000050-0x0000000000000057] CPU: 0 UID: 0 PID: 12 Comm: kworker/u8:1 Not tainted 6.11.0-rc5-next-20240827-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Workqueue: bat_events batadv_nc_worker RIP: 0010:pick_next_entity kernel/sched/fair.c:5613 [inline] RIP: 0010:pick_task_fair+0xc3/0x280 kernel/sched/fair.c:8742 Code: 00 00 80 3b 00 74 08 4c 89 ef e8 58 7d 01 00 0f 1f 44 00 00 4c 89 ef e8 6b f8 01 00 49 89 c4 48 8d 58 51 48 89 d8 48 c1 e8 03 <0f> b6 04 28 84 c0 75 5e 80 3b 00 74 2e 48 8b 3c 24 4c 89 e6 ba 01 RSP: 0018:ffffc90000117798 EFLAGS: 00010006 RAX: 000000000000000a RBX: 0000000000000051 RCX: 1ffff1100f8afd05 RDX: 0000000000000070 RSI: dffffc0000000000 RDI: ffff88807c57e828 RBP: dffffc0000000000 R08: ffffffff901c362f R09: 1ffffffff20386c5 R10: dffffc0000000000 R11: ffffffff81666260 R12: 0000000000000000 R13: ffff88807c57e800 R14: ffff8880b903eb90 R15: 1ffff11017207d72 FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5012915f40 CR3: 00000000622d2000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pick_task kernel/sched/core.c:6028 [inline] pick_next_task kernel/sched/core.c:6130 [inline] __schedule+0x2eab/0x4b30 kernel/sched/core.c:6632 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6999 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707 RIP: 0010:debug_lockdep_rcu_enabled+0x2a/0x40 kernel/rcu/update.c:321 Code: f3 0f 1e fa 31 c0 83 3d 4f 23 5c 04 00 74 1e 83 3d b6 52 5c 04 00 74 15 65 48 8b 0c 25 00 d8 03 00 31 c0 83 b9 dc 0a 00 00 00 <0f> 94 c0 c3 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 RSP: 0018:ffffc90000117b50 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff88807e8242c0 RCX: ffff888017abda00 RDX: 0000000000000000 RSI: ffffffff8c6088a0 RDI: ffffffff8c608860 RBP: 0000000000000000 R08: ffffffff8b8a34c1 R09: 1ffffffff26f6f00 R10: dffffc0000000000 R11: fffffbfff26f6f01 R12: ffff8880787bccc0 R13: 00000000000001a2 R14: ffff88807e8242c0 R15: dffffc0000000000 rcu_read_unlock include/linux/rcupdate.h:878 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline] batadv_nc_worker+0x1f3/0x610 net/batman-adv/network-coding.c:719 process_one_work kernel/workqueue.c:3232 [inline] process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3313 worker_thread+0x86d/0xd10 kernel/workqueue.c:3390 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:pick_next_entity kernel/sched/fair.c:5613 [inline] RIP: 0010:pick_task_fair+0xc3/0x280 kernel/sched/fair.c:8742 Code: 00 00 80 3b 00 74 08 4c 89 ef e8 58 7d 01 00 0f 1f 44 00 00 4c 89 ef e8 6b f8 01 00 49 89 c4 48 8d 58 51 48 89 d8 48 c1 e8 03 <0f> b6 04 28 84 c0 75 5e 80 3b 00 74 2e 48 8b 3c 24 4c 89 e6 ba 01 RSP: 0018:ffffc90000117798 EFLAGS: 00010006 RAX: 000000000000000a RBX: 0000000000000051 RCX: 1ffff1100f8afd05 RDX: 0000000000000070 RSI: dffffc0000000000 RDI: ffff88807c57e828 RBP: dffffc0000000000 R08: ffffffff901c362f R09: 1ffffffff20386c5 R10: dffffc0000000000 R11: ffffffff81666260 R12: 0000000000000000 R13: ffff88807c57e800 R14: ffff8880b903eb90 R15: 1ffff11017207d72 FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5012915f40 CR3: 00000000622d2000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 80 3b 00 cmpb $0x0,(%rbx) 5: 74 08 je 0xf 7: 4c 89 ef mov %r13,%rdi a: e8 58 7d 01 00 call 0x17d67 f: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 14: 4c 89 ef mov %r13,%rdi 17: e8 6b f8 01 00 call 0x1f887 1c: 49 89 c4 mov %rax,%r12 1f: 48 8d 58 51 lea 0x51(%rax),%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 0f b6 04 28 movzbl (%rax,%rbp,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 75 5e jne 0x90 32: 80 3b 00 cmpb $0x0,(%rbx) 35: 74 2e je 0x65 37: 48 8b 3c 24 mov (%rsp),%rdi 3b: 4c 89 e6 mov %r12,%rsi 3e: ba .byte 0xba 3f: 01 .byte 0x1