kern/68323: (WITNESS report): malloc(M_WAITOK) of "Mbuf", forcing M_NOWAIT with the non-sleepable locks held

[Nikolai Saoukh]

>Number:         68323
>Category:       kern
>Synopsis:       (WITNESS report): malloc(M_WAITOK) of "Mbuf", forcing M_NOWAIT with the non-sleepable locks held
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Jun 25 13:10:11 GMT 2004
>Closed-Date:
>Last-Modified:
>Originator:     Nikolai Saoukh
>Release:        FreeBSD 5.2-CURRENT i386
>Organization:
none
>Environment:
FreeBSD otdel-1.org 5.2-CURRENT FreeBSD 5.2-CURRENT #1: Thu Jun 24 11:11:43 MSD 2004 nms at otdel-1.org:/usr/obj/usr/src/sys/XXX i386 
>Description:
Jun 25 16:32:04 xxx kernel: malloc(M_WAITOK) of "Mbuf", forcing M_NOWAIT with the following non-sleepable locks held:
Jun 25 16:32:04 xxx kernel: exclusive sleep mutex rip r = 0 (0xc068f50c) locked @ /usr/src/sys/netinet/raw_ip.c:736
Jun 25 16:32:04 xxx kernel: Stack backtrace:
Jun 25 16:32:04 xxx kernel: backtrace(1,c36bd600,c0c21b00,14,de72babc) at backtrace+0x12
Jun 25 16:32:04 xxx kernel: witness_warn(5,0,c061cf8c,c06024aa) at witness_warn+0x18e
Jun 25 16:32:04 xxx kernel: uma_zalloc_arg(c0c21b00,de72bae0,2) at uma_zalloc_arg+0x38
Jun 25 16:32:04 xxx kernel: m_prepend(c36bd600,14,2,c35ca768,0) at m_prepend+0x52
Jun 25 16:32:04 xxx kernel: rip_output(c36bd600,c35ca768,2d936c3,0,c38fc840) at rip_output+0x95
Jun 25 16:32:04 xxx kernel: rip_send(c35ca768,0,c36bd600,0,0) at rip_send+0x93
Jun 25 16:32:04 xxx kernel: sosend(c35ca768,0,0,c36bd600,0) at sosend+0x5a5
Jun 25 16:32:04 xxx kernel: ng_ksocket_rcvdata(c3806780,c38e5180,c0606f29,3,c3105580) at ng_ksocket_rcvdata+0x1ce
Jun 25 16:32:04 xxx kernel: ng_apply_item(c5f3e100,c38e5180,116,c38e5180,c36bd600) at ng_apply_item+0x1c4
Jun 25 16:32:04 xxx kernel: ng_snd_item(c38e5180,0,c36bd600,2,1) at ng_snd_item+0x753
Jun 25 16:32:04 xxx kernel: ng_pptpgre_xmit(c5f06b00,0,c5f06b00,c5e2a414,6) at ng_pptpgre_xmit+0x477
Jun 25 16:32:04 xxx kernel: ng_pptpgre_send_ack_timeout(c34e8ba0) at ng_pptpgre_send_ack_timeout+0x1e7
Jun 25 16:32:04 xxx kernel: softclock(0) at softclock+0x176
Jun 25 16:32:04 xxx kernel: ithread_loop(c3103080,de72bd48,c3103080,c049520c,0) at ithread_loop+0x134
Jun 25 16:32:04 xxx kernel: fork_exit(c049520c,c3103080,de72bd48) at fork_exit+0x98
Jun 25 16:32:04 xxx kernel: fork_trampoline() at fork_trampoline+0x8
Jun 25 16:32:04 xxx kernel: --- trap 0x1, eip = 0, esp = 0xde72bd7c, ebp = 0 ---

>How-To-Repeat:
      
>Fix:
      
>Release-Note:
>Audit-Trail:
>Unformatted: