rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (10556 ticks this GP) idle=5e5/1/0x4000000000000000 softirq=181516/181517 fqs=5196 (t=10500 jiffies g=229505 q=562) NMI backtrace for cpu 0 CPU: 0 PID: 24423 Comm: syz-executor.1 Tainted: G W 5.17.0-syzkaller-10748-g2975dbdc3989 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x262/0x3f0 kernel/rcu/tree_stall.h:343 print_cpu_stall kernel/rcu/tree_stall.h:639 [inline] check_cpu_stall kernel/rcu/tree_stall.h:723 [inline] rcu_pending kernel/rcu/tree.c:3923 [inline] rcu_sched_clock_irq.cold+0xa1/0x8d6 kernel/rcu/tree.c:2625 update_process_times+0x16d/0x200 kernel/time/timer.c:1785 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:243 tick_sched_timer+0xee/0x120 kernel/time/tick-sched.c:1473 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline] __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:135 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline] RIP: 0010:kasan_check_range+0x119/0x180 mm/kasan/generic.c:189 Code: 8d 1c 2c eb 0c 48 83 c2 01 4c 89 d8 4c 39 da 74 0e 80 3a 00 74 ef 49 8d 04 2c 48 85 d2 75 0b 48 89 da 48 29 c2 e9 55 ff ff ff <49> 39 d2 75 17 49 0f be 02 41 83 e1 07 49 39 c1 7d 0a 5b b8 01 00 RSP: 0018:ffffc9000461ef38 EFLAGS: 00000286 RAX: 0000000000000001 RBX: fffff520008c3df1 RCX: ffffffff815ddb40 RDX: fffff520008c3df0 RSI: 0000000000000004 RDI: ffffc9000461ef80 RBP: fffff520008c3df0 R08: 0000000000000001 R09: ffffc9000461ef83 R10: fffff520008c3df0 R11: 0000000000000000 R12: ffff88802d0f2708 R13: ffff88802d0f2710 R14: 000000000000009c R15: dffffc0000000000 instrument_atomic_read_write include/linux/instrumented.h:101 [inline] atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:542 [inline] queued_spin_lock include/asm-generic/qspinlock.h:82 [inline] do_raw_spin_lock+0x120/0x2a0 kernel/locking/spinlock_debug.c:115 spin_lock_bh include/linux/spinlock.h:354 [inline] batadv_tt_local_purge+0x114/0x370 net/batman-adv/translation-table.c:1355 batadv_tt_local_resize_to_mtu+0x8e/0x130 net/batman-adv/translation-table.c:3957 batadv_hardif_activate_interface.part.0.cold+0x65/0x1ba net/batman-adv/hard-interface.c:662 batadv_hardif_activate_interface net/batman-adv/hard-interface.c:753 [inline] batadv_hardif_enable_interface+0xaba/0xac0 net/batman-adv/hard-interface.c:745 batadv_softif_slave_add+0x64/0x130 net/batman-adv/soft-interface.c:839 do_set_master+0x1c8/0x220 net/core/rtnetlink.c:2534 __rtnl_newlink+0x13b3/0x1760 net/core/rtnetlink.c:3500 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3531 rtnetlink_rcv_msg+0x413/0xb80 net/core/rtnetlink.c:5990 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2496 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x543/0x7f0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x904/0xe00 net/netlink/af_netlink.c:1921 sock_sendmsg_nosec net/socket.c:705 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:725 ____sys_sendmsg+0x6e2/0x800 net/socket.c:2413 ___sys_sendmsg+0xf3/0x170 net/socket.c:2467 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2496 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f1868089049 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f18691ab168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f186819c030 RCX: 00007f1868089049 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000006 RBP: 00007f18680e308d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc030314bf R14: 00007f18691ab300 R15: 0000000000022000 </TASK> ---------------- Code disassembly (best guess): 0: 8d 1c 2c lea (%rsp,%rbp,1),%ebx 3: eb 0c jmp 0x11 5: 48 83 c2 01 add $0x1,%rdx 9: 4c 89 d8 mov %r11,%rax c: 4c 39 da cmp %r11,%rdx f: 74 0e je 0x1f 11: 80 3a 00 cmpb $0x0,(%rdx) 14: 74 ef je 0x5 16: 49 8d 04 2c lea (%r12,%rbp,1),%rax 1a: 48 85 d2 test %rdx,%rdx 1d: 75 0b jne 0x2a 1f: 48 89 da mov %rbx,%rdx 22: 48 29 c2 sub %rax,%rdx 25: e9 55 ff ff ff jmpq 0xffffff7f * 2a: 49 39 d2 cmp %rdx,%r10 <-- trapping instruction 2d: 75 17 jne 0x46 2f: 49 0f be 02 movsbq (%r10),%rax 33: 41 83 e1 07 and $0x7,%r9d 37: 49 39 c1 cmp %rax,%r9 3a: 7d 0a jge 0x46 3c: 5b pop %rbx 3d: b8 .byte 0xb8 3e: 01 00 add %eax,(%rax)