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Description
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I ran into a panic when running GLDv3 test suite. Specifically, it panicked here:
> $C
000002a100bd4f01 mac_client_vid+4(0, 600109dc296, 0, ff, 0, 1912c00)
000002a100bd5041 proto_info_req+0x128(600113795f8, 2a100bd58f0, 7bf0c910,
30025d6ae50, 3018d7e16e0, 600109dc230)
000002a100bd5111 dld_wput_nondata_task+0x74(60011379698, 3000984d240, 7bf0cb80,
600113795f8, f749100, 7bf0c800)
000002a100bd51c1 taskq_d_thread+0xbc(3000984d250, 600102e92d8, 3000984d240,
60010011598, 7bf0bc18, 18be2c8)
000002a100bd5291 thread_start+4(600102e92d8, 0, baddcafebaddcafe,
baddcafebaddcafe, baddcafebaddcafe, baddcafebaddcafe)
> ::status
debugging crash dump vmcore.39 (64-bit) from data1
operating system: 5.11 onnv-clone (sun4u)
panic message:
BAD TRAP: type=31 rp=2a100bd5660 addr=178 mmu_fsr=0 occurred in module "mac" due
to a NULL pointer dereference
dump content: kernel pages only
> $C
000002a100bd4f01 mac_client_vid+4(0, 600109dc296, 0, ff, 0, 1912c00)
000002a100bd5041 proto_info_req+0x128(600113795f8, 2a100bd58f0, 7bf0c910,
30025d6ae50, 3018d7e16e0, 600109dc230)
000002a100bd5111 dld_wput_nondata_task+0x74(60011379698, 3000984d240, 7bf0cb80,
600113795f8, f749100, 7bf0c800)
000002a100bd51c1 taskq_d_thread+0xbc(3000984d250, 600102e92d8, 3000984d240,
60010011598, 7bf0bc18, 18be2c8)
000002a100bd5291 thread_start+4(600102e92d8, 0, baddcafebaddcafe,
baddcafebaddcafe, baddcafebaddcafe, baddcafebaddcafe)
It is due to NULL dsp->ds_mch in the following code:
/* Only VLAN links and links that have a normal tag mode support QOS. */
if (mac_client_vid(dsp->ds_mch) != VLAN_ID_NONE ||
dsp->ds_dlp->dl_tagmode == LINK_TAGMODE_NORMAL) {
...
}
Note that at this time, dsp->ds_mch is NULL.
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