batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (1 GPs behind) idle=b72/1/0x4000000000000002 softirq=98757/98758 fqs=5222
rcu: (t=10500 jiffies g=121049 q=2569)
NMI backtrace for cpu 0
CPU: 0 PID: 20837 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x15f/0x19c kernel/rcu/tree.c:1340
print_cpu_stall kernel/rcu/tree.c:1478 [inline]
check_cpu_stall kernel/rcu/tree.c:1550 [inline]
__rcu_pending kernel/rcu/tree.c:3293 [inline]
rcu_pending kernel/rcu/tree.c:3336 [inline]
rcu_check_callbacks.cold+0x62d/0xe19 kernel/rcu/tree.c:2682
update_process_times+0x2a/0x70 kernel/time/timer.c:1650
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:168
tick_sched_timer+0xfc/0x290 kernel/time/tick-sched.c:1278
__run_hrtimer kernel/time/hrtimer.c:1465 [inline]
__hrtimer_run_queues+0x3f6/0xe60 kernel/time/hrtimer.c:1527
hrtimer_interrupt+0x326/0x9e0 kernel/time/hrtimer.c:1585
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1071 [inline]
smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1096
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894
RIP: 0010:should_resched arch/x86/include/asm/preempt.h:99 [inline]
RIP: 0010:__local_bh_enable_ip+0x18d/0x270 kernel/softirq.c:196
Code: 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 dd 00 00 00 48 83 3d c8 5f b8 08 00 0f 84 8d 00 00 00 fb 66 0f 1f 44 00 00 <65> 8b 05 6c bc c8 7e 85 c0 74 7d 5b 5d 41 5c c3 80 3d f3 87 d5 09
RSP: 0018:ffff88804ad46e78 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff13e3053 RBX: 0000000000000201 RCX: 1ffff11013a919b2
RDX: dffffc0000000000 RSI: ffff88809d48cd70 RDI: ffff88809d48cd44
RBP: ffffffff87dbdb48 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809d48c4c0
R13: ffff888099d2fb98 R14: 0000000000000000 R15: dffffc0000000000
spin_unlock_bh include/linux/spinlock.h:374 [inline]
batadv_tt_local_purge+0x278/0x370 net/batman-adv/translation-table.c:1456
batadv_tt_local_resize_to_mtu+0x8e/0x130 net/batman-adv/translation-table.c:4207
batadv_hardif_activate_interface.part.0.cold+0x88/0x226 net/batman-adv/hard-interface.c:664
batadv_hardif_activate_interface net/batman-adv/hard-interface.c:825 [inline]
batadv_hardif_enable_interface+0xadf/0xba0 net/batman-adv/hard-interface.c:817
batadv_softif_slave_add+0x8a/0x100 net/batman-adv/soft-interface.c:898
do_set_master+0x1c8/0x220 net/core/rtnetlink.c:2321
rtnl_newlink+0x1279/0x15c0 net/core/rtnetlink.c:3170
rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4782
netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2463
netlink_unicast_kernel net/netlink/af_netlink.c:1325 [inline]
netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1351
netlink_sendmsg+0x6c3/0xc50 net/netlink/af_netlink.c:1917
sock_sendmsg_nosec net/socket.c:651 [inline]
sock_sendmsg+0xc3/0x120 net/socket.c:661
___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2227
__sys_sendmsg net/socket.c:2265 [inline]
__do_sys_sendmsg net/socket.c:2274 [inline]
__se_sys_sendmsg net/socket.c:2272 [inline]
__x64_sys_sendmsg+0x132/0x220 net/socket.c:2272
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f98bade7059
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:00007f98b973b168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f98baefa030 RCX: 00007f98bade7059
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000014
RBP: 00007f98bae4108d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffcf30e16f R14: 00007f98b973b300 R15: 0000000000022000
net_ratelimit: 5194 callbacks suppressed
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
rcu: 0-....: (10505 ticks this GP) idle=b72/1/0x4000000000000002 softirq=98748/98758 fqs=5220
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
rcu: (detected by 1, t=10553 jiffies, g=12445, q=20)
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 20837 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__wake_up_common+0xed/0x650 kernel/sched/wait.c:85
Code: 18 48 3b 3c 24 0f 84 6a 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 80 3c 01 00 0f 85 3e 05 00 00 49 8b 40 18 <89> 54 24 10 31 db 48 bd 00 00 00 00 00 fc ff df 4c 8d 60 e8 4c 89
RSP: 0018:ffff8880ba007bf8 EFLAGS: 00000046
RAX: ffffffff89f7afd8 RBX: ffffffff89f7afa0 RCX: 1ffff110146e87a6
RDX: 0000000000000001 RSI: 00000000ffffffff RDI: ffff8880a3743d30
RBP: 0000000000000001 R08: ffff8880a3743d18 R09: ffff8880ba007c98
R10: ffffffff89f7afa3 R11: 000000000001d8d9 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 00007f98b973b700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055c7c7808eb8 CR3: 0000000046f5c000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__wake_up_common_lock+0xcd/0x170 kernel/sched/wait.c:121
wake_up_klogd_work_func kernel/printk/printk.c:2937 [inline]
wake_up_klogd_work_func+0xc9/0xf0 kernel/printk/printk.c:2926
irq_work_run_list+0x140/0x1c0 kernel/irq_work.c:164
update_process_times+0x64/0x70 kernel/time/timer.c:1653
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:168
tick_sched_timer+0xfc/0x290 kernel/time/tick-sched.c:1278
__run_hrtimer kernel/time/hrtimer.c:1465 [inline]
__hrtimer_run_queues+0x3f6/0xe60 kernel/time/hrtimer.c:1527
hrtimer_interrupt+0x326/0x9e0 kernel/time/hrtimer.c:1585
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1071 [inline]
smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1096
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline]
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1724 [inline]
RIP: 0010:vprintk_emit+0x668/0x740 kernel/printk/printk.c:1964
Code: 48 b8 00 00 00 00 00 fc ff df 41 80 7c 05 00 00 0f 85 d9 00 00 00 48 83 3d 9c a2 a3 08 00 74 37 e8 7d a5 14 00 48 89 df 57 9d <0f> 1f 44 00 00 e9 82 fe ff ff e8 69 a5 14 00 0f 0b e8 62 a5 14 00
RSP: 0018:ffff88804ad46dd8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000040000 RBX: 0000000000000246 RCX: ffffc9000b4c0000
RDX: 0000000000040000 RSI: ffffffff814ddff3 RDI: 0000000000000246
RBP: ffff88804ad46e18 R08: ffffffff8cd47030 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000005c
R13: 1ffffffff13e3051 R14: 0000000000000200 R15: 0000000000000001
vprintk_func+0x79/0x180 kernel/printk/printk_safe.c:405
printk+0xba/0xed kernel/printk/printk.c:2040
batadv_tt_local_resize_to_mtu.cold+0x17/0x1c net/batman-adv/translation-table.c:4212
batadv_hardif_activate_interface.part.0.cold+0x88/0x226 net/batman-adv/hard-interface.c:664
batadv_hardif_activate_interface net/batman-adv/hard-interface.c:825 [inline]
batadv_hardif_enable_interface+0xadf/0xba0 net/batman-adv/hard-interface.c:817
batadv_softif_slave_add+0x8a/0x100 net/batman-adv/soft-interface.c:898
do_set_master+0x1c8/0x220 net/core/rtnetlink.c:2321
rtnl_newlink+0x1279/0x15c0 net/core/rtnetlink.c:3170
rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4782
netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2463
netlink_unicast_kernel net/netlink/af_netlink.c:1325 [inline]
netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1351
netlink_sendmsg+0x6c3/0xc50 net/netlink/af_netlink.c:1917
sock_sendmsg_nosec net/socket.c:651 [inline]
sock_sendmsg+0xc3/0x120 net/socket.c:661
___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2227
__sys_sendmsg net/socket.c:2265 [inline]
__do_sys_sendmsg net/socket.c:2274 [inline]
__se_sys_sendmsg net/socket.c:2272 [inline]
__x64_sys_sendmsg+0x132/0x220 net/socket.c:2272
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f98bade7059
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:00007f98b973b168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f98baefa030 RCX: 00007f98bade7059
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000014
RBP: 00007f98bae4108d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffcf30e16f R14: 00007f98b973b300 R15: 0000000000022000
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
net_ratelimit: 4691 callbacks suppressed
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
----------------
Code disassembly (best guess), 6 bytes skipped:
0: df 48 c1 fisttps -0x3f(%rax)
3: e8 03 80 3c 10 callq 0x103c800b
8: 00 0f add %cl,(%rdi)
a: 85 dd test %ebx,%ebp
c: 00 00 add %al,(%rax)
e: 00 48 83 add %cl,-0x7d(%rax)
11: 3d c8 5f b8 08 cmp $0x8b85fc8,%eax
16: 00 0f add %cl,(%rdi)
18: 84 8d 00 00 00 fb test %cl,-0x5000000(%rbp)
1e: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
* 24: 65 8b 05 6c bc c8 7e mov %gs:0x7ec8bc6c(%rip),%eax # 0x7ec8bc97 <-- trapping instruction
2b: 85 c0 test %eax,%eax
2d: 74 7d je 0xac
2f: 5b pop %rbx
30: 5d pop %rbp
31: 41 5c pop %r12
33: c3 retq
34: 80 .byte 0x80
35: 3d f3 87 d5 09 cmp $0x9d587f3,%eax