Messages in this thread | | | Date | Thu, 4 Nov 2004 13:12:42 +0200 | From | Sami Farin <> | Subject | Re: kernel 2.6.9 freezes upon dereferencing invalid C++ ref in xxdiff. |
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On Wed, Nov 03, 2004 at 07:42:02PM -0700, Zwane Mwaikambo wrote: > On Wed, 3 Nov 2004, Martin Blais wrote: > > > [1.] One line summary of the problem: > > > > kernel 2.6.9 freezes upon dereferenceing invalid C++ ref in xxdiff. > > Interesting, i could trigger it in 2.6.9 but not 2.6.10-rc1-mm2. > > ------------[ cut here ]------------ > kernel BUG at <bad filename>:25321! hmm > invalid operand: 0000 [#1] > SMP DEBUG_PAGEALLOC > Modules linked in: pcnet32 > CPU: 0 > EIP: 0060:[<c038a344>] Not tainted VLI > EFLAGS: 00010246 (2.6.9-rtl) > EIP is at tcp_transmit_skb+0x8f4/0x900 > eax: c19e9eb8 ebx: c2974f60 ecx: 00000020 edx: c2986f60 > esi: 00000020 edi: c21b1dc0 ebp: c2974f60 esp: c23cfd8c > ds: 007b es: 007b ss: 0068 > Process xxdiff (pid: 2194, threadinfo=c23ce000 task=c19e2aa0) > Stack: c013c879 c3e9b3c0 00000020 c2986000 c03616f7 00000246 c2974f60 00000020 > c2986f98 c21b1d28 c2974f60 00000020 c21b1bb0 c2974f60 c038c15a c21b1bb0 > c2986f60 c21b1dc0 c2970f60 c21b1bb0 00000218 c0388d23 c21b1bb0 c2970f60 > Call Trace: > [<c013c879>] kmem_cache_alloc+0x69/0xa0 > [<c03616f7>] skb_clone+0x17/0x140 > [<c038c15a>] tcp_send_synack+0x14a/0x150 > [<c0388d23>] tcp_rcv_synsent_state_process+0x543/0x5a0 > [<c0389723>] tcp_rcv_state_process+0x9a3/0xab0 > [<c0391236>] tcp_v4_do_rcv+0x76/0x110 > [<c0360a72>] __release_sock+0x42/0x60 > [<c0361186>] release_sock+0x56/0x60 > [<c039e58f>] inet_wait_for_connect+0x7f/0xe0 > [<c0118d40>] autoremove_wake_function+0x0/0x40 > [<c0118d40>] autoremove_wake_function+0x0/0x40 > [<c039e693>] inet_stream_connect+0xa3/0x180 > [<c035eecd>] sys_connect+0x5d/0x80 > [<c035fbcc>] sock_setsockopt+0x9c/0x500 > [<c035dad2>] sock_map_fd+0x102/0x140 ...
this looks familiar. probably fixed by this patch: [NET]: Make sure to copy TSO fields in copy_skb_header(). http://linux.bkbits.net:8080/linux-2.6/gnupatch@4175f00ayR2dZynZ8yUWYSVkL6Z5og
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