System Panic Reboots with 'kernel BUG at net/core/skbuff.c:131!'

Solution Verified - Updated -

Issue

  • RHEL 7.5 keeps rebooting with the above panic message.
  • System generated a vmcore with RIP skb_panic+99
  • Panic with corrupt skb such as:
    [exception RIP: kfree+0x13c]
 #8 [ffff969fa7c03d80] skb_release_data at ffffffffa96386c5
 #9 [ffff969fa7c03da8] skb_release_all at ffffffffa9638734
#10 [ffff969fa7c03dc0] consume_skb at ffffffffa9638c1c
#11 [ffff969fa7c03de0] __dev_kfree_skb_any at ffffffffa964db9d
#12 [ffff969fa7c03e28] ipoib_tx_poll at ffffffffc0926f3a [ib_ipoib]
#13 [ffff969fa7c03e78] net_rx_action at ffffffffa965057f
  • OR
PID: 8120   TASK: ffff92bc44f941c0  CPU: 2   COMMAND: "mmfsd"
#10 [ffff92bc44fa7548] tcp_gso_segment at ffffffff8f6ca738
#11 [ffff92bc44fa75a8] tcp4_gso_segment at ffffffff8f6caae6
#12 [ffff92bc44fa75c8] inet_gso_segment at ffffffff8f6dc6d4
#13 [ffff92bc44fa7628] skb_mac_gso_segment at ffffffff8f655572
#14 [ffff92bc44fa7660] __skb_gso_segment at ffffffff8f6556b9

Environment

  • Red Hat Enterprise Linux 7.5 to 7.8
  • Mellanox ConnectX InfiniBand interface with IPoIB in Connected Mode

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