batman_adv: batadv1: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv1: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv1: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-....: (1 GPs behind) idle=6ce/1/0x4000000000000002 softirq=230588/230589 fqs=5216
rcu: (t=10500 jiffies g=245597 q=1669)
NMI backtrace for cpu 1
CPU: 1 PID: 29073 Comm: syz-executor.0 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:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__local_bh_enable_ip+0x57/0x270 kernel/softirq.c:169
Code: 89 c1 83 e0 07 48 c1 e9 03 83 c0 03 0f b6 14 11 38 d0 7c 08 84 d2 0f 85 d6 01 00 00 8b 0d c1 cf 0c 09 85 c9 0f 84 89 00 00 00 <65> 4c 8b 24 25 c0 df 01 00 49 8d bc 24 84 08 00 00 48 b8 00 00 00
RSP: 0018:ffff88804688ee98 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000003 RBX: 0000000000000201 RCX: 0000000000000001
RDX: 0000000000000004 RSI: 0000000000000201 RDI: ffffffff87dbea0a
RBP: ffffffff87dbea0a R08: 0000000000000000 R09: ffffed100588cc1c
R10: ffff88802c4660e3 R11: 0000000000000000 R12: ffff88809269c620
R13: 0000000000000001 R14: ffff88809fbcd900 R15: 0000000000000014
spin_unlock_bh include/linux/spinlock.h:374 [inline]
batadv_tt_local_purge_pending_clients+0x2aa/0x3a0 net/batman-adv/translation-table.c:3924
batadv_tt_local_resize_to_mtu+0x96/0x130 net/batman-adv/translation-table.c:4208
batadv_hardif_activate_interface.part.0.cold+0x1bd/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: 0033:0x7f4eda154e99
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4ed8aa9168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f4eda268030 RCX: 00007f4eda154e99
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000006
RBP: 00007f4eda1aeff1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffefaad2aaf R14: 00007f4ed8aa9300 R15: 0000000000022000
net_ratelimit: 5461 callbacks suppressed
batman_adv: batadv1: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
batman_adv: batadv1: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
rcu: 1-....: (1 GPs behind) idle=6ce/1/0x4000000000000002 softirq=230588/230589 fqs=5216
batman_adv: batadv1: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
rcu: (detected by 0, t=10562 jiffies, g=86953, q=12)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 29073 Comm: syz-executor.0 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:native_apic_mem_write+0x8/0x10 arch/x86/include/asm/apic.h:109
Code: 3d cc 17 3d 0b 01 7f 02 5d c3 89 ef 5d e9 f5 fe c9 06 48 c7 c7 00 97 65 8c e8 84 e2 6f 00 eb df 66 90 89 ff 89 b7 00 c0 5f ff 0f 1f 80 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 53 89 fb 48
RSP: 0018:ffff8880ba107e98 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffffffff89cfb1a0 RCX: 0000000000000020
RDX: 1ffffffff139f636 RSI: 00000000000658b3 RDI: 0000000000000380
RBP: ffff8880ba11e2c0 R08: ffffffff8c665058 R09: 0000000000000000
R10: 0000000000000007 R11: ffffffff8c66505b R12: 00000000000658b3
R13: 0000000000000000 R14: ffff8880ba124cc0 R15: ffff8880ba124d30
FS: 00007f4ed8aa9700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffb3ba57000 CR3: 0000000043117000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
apic_write arch/x86/include/asm/apic.h:389 [inline]
lapic_next_event+0x4d/0x80 arch/x86/kernel/apic/apic.c:460
clockevents_program_event+0x234/0x350 kernel/time/clockevents.c:344
tick_program_event+0xac/0x140 kernel/time/tick-oneshot.c:48
hrtimer_interrupt+0x40a/0x9e0 kernel/time/hrtimer.c:1598
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:ffff88804688edd8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000040000 RBX: 0000000000000246 RCX: ffffc90007a47000
RDX: 0000000000040000 RSI: ffffffff814ddff3 RDI: 0000000000000246
RBP: ffff88804688ee18 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+0x1bd/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: 0033:0x7f4eda154e99
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4ed8aa9168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f4eda268030 RCX: 00007f4eda154e99
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000006
RBP: 00007f4eda1aeff1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffefaad2aaf R14: 00007f4ed8aa9300 R15: 0000000000022000
batman_adv: batadv1: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv1: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv1: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv1: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv1: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv1: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv1: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
net_ratelimit: 4976 callbacks suppressed
batman_adv: batadv1: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv1: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv1: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv1: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv1: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv1: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv1: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv1: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv1: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
batman_adv: batadv1: Forced to purge local tt entries to fit new maximum fragment MTU (-320)
----------------
Code disassembly (best guess):
0: 89 c1 mov %eax,%ecx
2: 83 e0 07 and $0x7,%eax
5: 48 c1 e9 03 shr $0x3,%rcx
9: 83 c0 03 add $0x3,%eax
c: 0f b6 14 11 movzbl (%rcx,%rdx,1),%edx
10: 38 d0 cmp %dl,%al
12: 7c 08 jl 0x1c
14: 84 d2 test %dl,%dl
16: 0f 85 d6 01 00 00 jne 0x1f2
1c: 8b 0d c1 cf 0c 09 mov 0x90ccfc1(%rip),%ecx # 0x90ccfe3
22: 85 c9 test %ecx,%ecx
24: 0f 84 89 00 00 00 je 0xb3
* 2a: 65 4c 8b 24 25 c0 df mov %gs:0x1dfc0,%r12 <-- trapping instruction
31: 01 00
33: 49 8d bc 24 84 08 00 lea 0x884(%r12),%rdi
3a: 00
3b: 48 rex.W
3c: b8 .byte 0xb8
3d: 00 00 add %al,(%rax)