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Bug #3320

closed

vtnet: Panic when setting MTU to 16384

Added by tuxillo over 3 years ago. Updated almost 3 years ago.

Status:
Resolved
Priority:
High
Assignee:
tuxillo
Category:
Driver
Target version:
6.4
Start date:
07/30/2022
Due date:
% Done:

0%

Estimated time:

Description

As reported here , a kernel panic is triggered when trying to set MTU to 16384 for vtnet:

root@buildlet:~ # ifconfig vtnet0 mtu 16384
panic: overflowed mbuf 0xfffff8037c5bec00
cpuid = 8
Trace beginning at frame 0xfffff8037cf9c6e8
m_free() at m_free+0x351 0xffffffff806be5c1 
m_free() at m_free+0x351 0xffffffff806be5c1 
m_freem() at m_freem+0x15 0xffffffff806be845 
vtnet_newbuf() at vtnet_newbuf+0x4b 0xffffffff80a71e9b 
vtnet_init() at vtnet_init+0x108 0xffffffff80a73848 
vtnet_ioctl() at vtnet_ioctl+0x213 0xffffffff80a73d23 
Debugger("panic")

CPU8 stopping CPUs: 0x0000feff
 stopped
Stopped at      Debugger+0x7c:  movb    $0,0xbcc819(%rip)
db> 
db>
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