diff options
| author |   Steven <sluong@cisco.com> | 2017-09-30 10:50:20 -0700 |
|---|---|---|
| committer | steven luong <sluong@cisco.com> | 2017-10-05 04:07:59 +0000 |
| commit | 79bfbae54c8ecf4c87b42beee26b71e09e3eb494 (patch) | |
| tree | 6b860992f63c9e8a48d2443108edf22eedfc3882 | |
| parent | f3d627dd3c8130146429d3a884e0865b98d6a98d (diff) | |
memif: crash on slave mode (VPP-1006)
Crash was seen on recent image with this BT on top of the stack
(gdb) bt full
(mif=0x7fffb6226568) at
/vpp/build-data/../src/plugins/memif/memif.c:297
ring = 0x0 <<<<<<<<<<
i = 0
j = 0
buffer_offset = 65792
r = 0x7fffb5e59f80
alloc = {flags = 1, name = 0x7fffb449f965 "memif region",
size = 4260096, numa_node = 0, addr = 0x7fff41dac000,
fd = 11,
log2_page_size = 12, n_pages = 1041}
err = 0x0
__FUNCTION__ = "memif_init_regions_and_queues"
The crash happened at this line.
ring = memif_get_ring (mif, MEMIF_RING_S2M, i);
ring=>head = ring->tail = 0; <=====
Please note that the crash is caused by dereferencing NULL rinng.
Put breakpoint into the function. I notice that
mif->regions[0].shm is not initialized.
(gdb) p mif->regions[0].shm
$8 = (void *) 0x0
It looks like we forgot to set shm after clib_mem_vm_ext_alloc().
Add the missing cide and the crash is fixed.
Change-Id: Ib722a6c241c77acfa8e33962106b57faa50e1ea7
Signed-off-by: Steven <sluong@cisco.com>
(cherry picked from commit 9fefa9a697daf0e949ea7a2700ecaf2ba4d1d2cb)
| -rw-r--r-- | src/plugins/memif/memif.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/plugins/memif/memif.c b/src/plugins/memif/memif.c index 6a609a57..a3be49fa 100644 --- a/src/plugins/memif/memif.c +++ b/src/plugins/memif/memif.c @@ -290,6 +290,7 @@ memif_init_regions_and_queues (memif_if_t * mif) return err; r->fd = alloc.fd; + r->shm = alloc.addr; for (i = 0; i < mif->run.num_s2m_rings; i++) { |