cvs commit: src/sys/net if_vlan.c

Maxim Konovalov maxim at
Thu Jun 29 09:24:59 UTC 2006

On Thu, 29 Jun 2006, 07:52-0000, Yar Tikhiy wrote:

> yar         2006-06-29 07:52:30 UTC
>   FreeBSD src repository
>   Modified files:
>     sys/net              if_vlan.c
>   Log:
>   Detach the interface first, do vlan_unconfig() then.
>   Previously, another thread could get a pointer to the
>   interface by scanning the system-wide list and sleep
>   on the global vlan mutex held by vlan_unconfig().
>   The interface was gone by the time the other thread
>   woke up.
>   In order to be able to call vlan_unconfig() on a detached
>   interface, remove the purely cosmetic bzero'ing of IF_LLADDR
>   from the function because a detached interface has no addresses.
>   Noticed by:     a stress-testing script by maxim
>   Reviewed by:    glebius

Still no cookie :-)

db> bt
Tracing pid 75800 tid 100098 td 0xc2b0e960
in_control(c2a1c67c,c02069f6,c40eece0,c2e66000,c2b0e960) at in_control+0x114
ifioctl(c2a1c67c,c02069f6,c40eece0,c2b0e960,0,...) at ifioctl+0xee
soo_ioctl(c27cb4c8,c02069f6,c40eece0,c2c04980,c2b0e960) at soo_ioctl+0x2db
ioctl(c2b0e960,d56a4d04) at ioctl+0x370
syscall(3b,3b,3b,bfbfe2c4,0,...) at syscall+0x27e
Xint0x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (54, FreeBSD ELF32, ioctl), eip = 0x2817cb43, esp =
0xbfbfe28c, ebp = 0xbfbfe2d8 ---

Let me know if you need more info.

Maxim Konovalov

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