[BUG]: 2.4.10 lockup using ppp on SMP

From: Till Immanuel Patzschke (tip@internetwork-ag.de)
Date: Fri Sep 28 2001 - 10:03:06 EST


2.4.10 (and all its 2.4.x predecessors) lock up in ppp_destroy_interface. Thanks
to the kdb I got the two tracebacks below - the all_ppp_lock interferes with
some other (socket?!) lock...
Any help is VERY much appreciated!


output from kdb:

    EBP EIP Function(args)
           0xc02ed78a stext_lock+0x4bce
                               kernel .text.lock 0xc02e8bbc 0xc02e8bbc 0xc02f20e

0xf63edf3c 0xc0205698 ppp_destroy_interface+0x38 (0xf63f1800)
                               kernel .text 0xc0100000 0xc0205660 0xc0205b28
0xf63edf94 0xc02018f0 ppp_ioctl+0x2e8 (0xf6c34100, 0xf64025e0, 0x4004743c, 0x22)

                               kernel .text 0xc0100000 0xc0201608 0xc0202304
0xf63edfbc 0xc0154e39 sys_ioctl+0x239 (0x4, 0x4004743c, 0x22, 0xbffff6e4, 0x804d

                               kernel .text 0xc0100000 0xc0154c00 0xc0154ed0
           0xc01076ef system_call+0x33
                               kernel .text 0xc0100000 0xc01076bc 0xc01076f4
[0]kdb> cpu 1

Entering kdb (current=0xf61a0000, pid 525) on processor 1 due to cpu switch
[1]kdb> bt
    EBP EIP Function(args)
           0xc02eeae0 stext_lock+0x5f24
                               kernel .text.lock 0xc02e8bbc 0xc02e8bbc 0xc02f20e

0xf61a1f94 0xc0276157 sock_ioctl+0xe3 (0xf61da760, 0xf61a2da0, 0x8914, 0xbffff42

                               kernel .text 0xc0100000 0xc0276074 0xc0276170
0xf61a1fbc 0xc0154e39 sys_ioctl+0x239 (0x5, 0x8914, 0xbffff42c, 0x4, 0xbffff44c)

                               kernel .text 0xc0100000 0xc0154c00 0xc0154ed0
           0xc01076ef system_call+0x33
                               kernel .text 0xc0100000 0xc01076bc 0xc01076f4

Till Immanuel Patzschke                 mailto: tip@internetwork-ag.de
interNetwork AG                         Phone:  +49-(0)611-1731-121
Bierstadter Str. 7                      Fax:    +49-(0)611-1731-31
D-65189 Wiesbaden                       Web:    http://www.internetwork-ag.de

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